A determination of the charm content of the proton

Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic s...
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Autor*in:	Ball, Richard D. [verfasserIn] Bertone, Valerio [verfasserIn] Bonvini, Marco [verfasserIn] Carrazza, Stefano [verfasserIn] Forte, Stefano [verfasserIn] Guffanti, Alberto [verfasserIn] Hartland, Nathan P. [verfasserIn] Rojo, Juan [verfasserIn] Rottoli, Luca [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2016

Schlagwörter:	Parton Distribution Function Charm Quark Momentum Fraction Charm Production Charm Mass

Übergeordnetes Werk:	Enthalten in: The European physical journal - Berlin : Springer, 1998, 76(2016), 11 vom: 24. Nov.
Übergeordnetes Werk:	volume:76 ; year:2016 ; number:11 ; day:24 ; month:11

Links:	Volltext

DOI / URN:	10.1140/epjc/s10052-016-4469-y

Katalog-ID:	SPR008348936

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520			\|a Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data.
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650		4	\|a Momentum Fraction \|7 (dpeaa)DE-He213
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700	1		\|a Bertone, Valerio \|e verfasserin \|4 aut
700	1		\|a Bonvini, Marco \|e verfasserin \|4 aut
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700	1		\|a Forte, Stefano \|e verfasserin \|4 aut
700	1		\|a Guffanti, Alberto \|e verfasserin \|4 aut
700	1		\|a Hartland, Nathan P. \|e verfasserin \|4 aut
700	1		\|a Rojo, Juan \|e verfasserin \|4 aut
700	1		\|a Rottoli, Luca \|e verfasserin \|4 aut
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allfields	10.1140/epjc/s10052-016-4469-y doi (DE-627)SPR008348936 (SPR)s10052-016-4469-y-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl Ball, Richard D. verfasserin aut A determination of the charm content of the proton 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data. Parton Distribution Function (dpeaa)DE-He213 Charm Quark (dpeaa)DE-He213 Momentum Fraction (dpeaa)DE-He213 Charm Production (dpeaa)DE-He213 Charm Mass (dpeaa)DE-He213 Bertone, Valerio verfasserin aut Bonvini, Marco verfasserin aut Carrazza, Stefano verfasserin aut Forte, Stefano verfasserin aut Guffanti, Alberto verfasserin aut Hartland, Nathan P. verfasserin aut Rojo, Juan verfasserin aut Rottoli, Luca verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 76(2016), 11 vom: 24. Nov. (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:76 year:2016 number:11 day:24 month:11 https://dx.doi.org/10.1140/epjc/s10052-016-4469-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2119 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.50 ASE AR 76 2016 11 24 11
spelling	10.1140/epjc/s10052-016-4469-y doi (DE-627)SPR008348936 (SPR)s10052-016-4469-y-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl Ball, Richard D. verfasserin aut A determination of the charm content of the proton 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data. Parton Distribution Function (dpeaa)DE-He213 Charm Quark (dpeaa)DE-He213 Momentum Fraction (dpeaa)DE-He213 Charm Production (dpeaa)DE-He213 Charm Mass (dpeaa)DE-He213 Bertone, Valerio verfasserin aut Bonvini, Marco verfasserin aut Carrazza, Stefano verfasserin aut Forte, Stefano verfasserin aut Guffanti, Alberto verfasserin aut Hartland, Nathan P. verfasserin aut Rojo, Juan verfasserin aut Rottoli, Luca verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 76(2016), 11 vom: 24. Nov. (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:76 year:2016 number:11 day:24 month:11 https://dx.doi.org/10.1140/epjc/s10052-016-4469-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2119 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.50 ASE AR 76 2016 11 24 11
allfields_unstemmed	10.1140/epjc/s10052-016-4469-y doi (DE-627)SPR008348936 (SPR)s10052-016-4469-y-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl Ball, Richard D. verfasserin aut A determination of the charm content of the proton 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data. Parton Distribution Function (dpeaa)DE-He213 Charm Quark (dpeaa)DE-He213 Momentum Fraction (dpeaa)DE-He213 Charm Production (dpeaa)DE-He213 Charm Mass (dpeaa)DE-He213 Bertone, Valerio verfasserin aut Bonvini, Marco verfasserin aut Carrazza, Stefano verfasserin aut Forte, Stefano verfasserin aut Guffanti, Alberto verfasserin aut Hartland, Nathan P. verfasserin aut Rojo, Juan verfasserin aut Rottoli, Luca verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 76(2016), 11 vom: 24. Nov. (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:76 year:2016 number:11 day:24 month:11 https://dx.doi.org/10.1140/epjc/s10052-016-4469-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2119 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.50 ASE AR 76 2016 11 24 11
allfieldsGer	10.1140/epjc/s10052-016-4469-y doi (DE-627)SPR008348936 (SPR)s10052-016-4469-y-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl Ball, Richard D. verfasserin aut A determination of the charm content of the proton 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data. Parton Distribution Function (dpeaa)DE-He213 Charm Quark (dpeaa)DE-He213 Momentum Fraction (dpeaa)DE-He213 Charm Production (dpeaa)DE-He213 Charm Mass (dpeaa)DE-He213 Bertone, Valerio verfasserin aut Bonvini, Marco verfasserin aut Carrazza, Stefano verfasserin aut Forte, Stefano verfasserin aut Guffanti, Alberto verfasserin aut Hartland, Nathan P. verfasserin aut Rojo, Juan verfasserin aut Rottoli, Luca verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 76(2016), 11 vom: 24. Nov. (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:76 year:2016 number:11 day:24 month:11 https://dx.doi.org/10.1140/epjc/s10052-016-4469-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2119 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.50 ASE AR 76 2016 11 24 11
allfieldsSound	10.1140/epjc/s10052-016-4469-y doi (DE-627)SPR008348936 (SPR)s10052-016-4469-y-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl Ball, Richard D. verfasserin aut A determination of the charm content of the proton 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data. Parton Distribution Function (dpeaa)DE-He213 Charm Quark (dpeaa)DE-He213 Momentum Fraction (dpeaa)DE-He213 Charm Production (dpeaa)DE-He213 Charm Mass (dpeaa)DE-He213 Bertone, Valerio verfasserin aut Bonvini, Marco verfasserin aut Carrazza, Stefano verfasserin aut Forte, Stefano verfasserin aut Guffanti, Alberto verfasserin aut Hartland, Nathan P. verfasserin aut Rojo, Juan verfasserin aut Rottoli, Luca verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 76(2016), 11 vom: 24. Nov. (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:76 year:2016 number:11 day:24 month:11 https://dx.doi.org/10.1140/epjc/s10052-016-4469-y kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2119 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.50 ASE AR 76 2016 11 24 11
language	English
source	Enthalten in The European physical journal 76(2016), 11 vom: 24. Nov. volume:76 year:2016 number:11 day:24 month:11
sourceStr	Enthalten in The European physical journal 76(2016), 11 vom: 24. Nov. volume:76 year:2016 number:11 day:24 month:11
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Parton Distribution Function Charm Quark Momentum Fraction Charm Production Charm Mass
dewey-raw	530
isfreeaccess_bool	true
container_title	The European physical journal
authorswithroles_txt_mv	Ball, Richard D. @@aut@@ Bertone, Valerio @@aut@@ Bonvini, Marco @@aut@@ Carrazza, Stefano @@aut@@ Forte, Stefano @@aut@@ Guffanti, Alberto @@aut@@ Hartland, Nathan P. @@aut@@ Rojo, Juan @@aut@@ Rottoli, Luca @@aut@@
publishDateDaySort_date	2016-11-24T00:00:00Z
hierarchy_top_id	253722934
dewey-sort	3530
id	SPR008348936
language_de	englisch
fullrecord	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">SPR008348936</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20220110202231.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">201005s2016 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1140/epjc/s10052-016-4469-y</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)SPR008348936</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(SPR)s10052-016-4469-y-e</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">530</subfield><subfield code="q">ASE</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">33.50</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Ball, Richard D.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="2"><subfield code="a">A determination of the charm content of the proton</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2016</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. 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author	Ball, Richard D.
spellingShingle	Ball, Richard D. ddc 530 bkl 33.50 misc Parton Distribution Function misc Charm Quark misc Momentum Fraction misc Charm Production misc Charm Mass A determination of the charm content of the proton
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topic_title	530 ASE 33.50 bkl A determination of the charm content of the proton Parton Distribution Function (dpeaa)DE-He213 Charm Quark (dpeaa)DE-He213 Momentum Fraction (dpeaa)DE-He213 Charm Production (dpeaa)DE-He213 Charm Mass (dpeaa)DE-He213
topic	ddc 530 bkl 33.50 misc Parton Distribution Function misc Charm Quark misc Momentum Fraction misc Charm Production misc Charm Mass
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title	A determination of the charm content of the proton
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title_full	A determination of the charm content of the proton
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author_browse	Ball, Richard D. Bertone, Valerio Bonvini, Marco Carrazza, Stefano Forte, Stefano Guffanti, Alberto Hartland, Nathan P. Rojo, Juan Rottoli, Luca
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title_sort	determination of the charm content of the proton
title_auth	A determination of the charm content of the proton
abstract	Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data.
abstractGer	Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data.
abstract_unstemmed	Abstract We present an unbiased determination of the charm content of the proton, in which the charm parton distribution function (PDF) is parametrized on the same footing as the light quarks and the gluon in a global PDF analysis. This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data.
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title_short	A determination of the charm content of the proton
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up_date	2024-07-03T19:36:28.932Z
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This determination relies on the NLO calculation of deep-inelastic structure functions in the FONLL scheme, generalized to account for massive charm-initiated contributions. When the EMC charm structure function dataset is included, it is well described by the fit, and PDF uncertainties in the fitted charm PDF are significantly reduced. We then find that the fitted charm PDF vanishes within uncertainties at a scale %$Q\sim 1.6%$ GeV for all %$x\lesssim 0.1%$, independent of the value of %$m_c%$ used in the coefficient functions. We also find some evidence that the charm PDF at large %$x\gtrsim 0.1%$ and low scales does not vanish, but rather has an “intrinsic” component, very weakly scale dependent and almost independent of the value of %$m_c%$, carrying less than %$1\%%$ of the total momentum of the proton. The uncertainties in all other PDFs are only slightly increased by the inclusion of fitted charm, while the dependence of these PDFs on %$m_c%$ is reduced. The increased stability with respect to %$m_c%$ persists at high scales and is the main implication of our results for LHC phenomenology. Our results show that if the EMC data are correct, then the usual approach in which charm is perturbatively generated leads to biased results for the charm PDF, though at small x this bias could be reabsorbed if the uncertainty due to the charm mass and missing higher orders were included. We show that LHC data for processes, such as high %$p_T%$ and large rapidity charm pair production and %$Z+c%$ production, have the potential to confirm or disprove the implications of the EMC data.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Parton Distribution Function</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Charm Quark</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Momentum Fraction</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Charm Production</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Charm Mass</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Bertone, Valerio</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Bonvini, Marco</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Carrazza, Stefano</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Forte, Stefano</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Guffanti, Alberto</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Hartland, Nathan P.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Rojo, Juan</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Rottoli, Luca</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">The European physical journal</subfield><subfield code="d">Berlin : Springer, 1998</subfield><subfield code="g">76(2016), 11 vom: 24. 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A determination of the charm content of the proton

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