Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC

Abstract This paper discusses the potential of ATLAS to study supersymmetry in the “focus point” region of the parameter space of mSUGRA models. The potential to discover a deviation from standard model expectations with the first few $ fb^{-1} $ of LHC data was studied using the parametrized simula...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	De Sanctis, U. [verfasserIn] Lari, T. [verfasserIn] Montesano, S. [verfasserIn] Troncon, C. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2007

Schlagwörter:	Invariant Mass Invariant Mass Distribution Standard Model Background Standard Model Expectation Light SUSY Particle

Übergeordnetes Werk:	Enthalten in: The European physical journal - Berlin : Springer, 1998, 52(2007), 3 vom: 26. Sept., Seite 743-758
Übergeordnetes Werk:	volume:52 ; year:2007 ; number:3 ; day:26 ; month:09 ; pages:743-758

Links:	Volltext

DOI / URN:	10.1140/epjc/s10052-007-0415-3

Katalog-ID:	SPR008312095

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allfields	10.1140/epjc/s10052-007-0415-3 doi (DE-627)SPR008312095 (SPR)s10052-007-0415-3-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl De Sanctis, U. verfasserin aut Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses the potential of ATLAS to study supersymmetry in the “focus point” region of the parameter space of mSUGRA models. The potential to discover a deviation from standard model expectations with the first few $ fb^{-1} $ of LHC data was studied using the parametrized simulation of the ATLAS detector. Several signatures were considered, involving hard jets, large missing energy, and either b-tagged jets, opposite-sign isolated electron or muon pairs, or top quarks reconstructed exploiting their fully-hadronic decays. With only 1 $ fb^{-1} $ of data each of these signatures may allow for observing an excess of events over standard model expectations with a statistical significance exceeding five standard deviations. Furthermore, each of the two invariant mass distributions of the two leptons produced by the $\tilde\chi^0_3\rightarrow\tilde\chi^0_1 l^+ l^-$ and the $\tilde\chi^0_2\rightarrow\tilde\chi^0_1 l^+ l^-$ three-body decays has a kinematic endpoint that measures the difference between the masses of the parent and daughter neutralino. An analytical expression was derived for the shape of this distribution and was used to fit the simulated LHC data. A measurement of the $\tilde\chi^0_2-\tilde\chi^0_1$ and $\tilde\chi^0_3-\tilde\chi^0_1$ mass differences was obtained and this information was used to constrain the MSSM parameter space. Invariant Mass (dpeaa)DE-He213 Invariant Mass Distribution (dpeaa)DE-He213 Standard Model Background (dpeaa)DE-He213 Standard Model Expectation (dpeaa)DE-He213 Light SUSY Particle (dpeaa)DE-He213 Lari, T. verfasserin aut Montesano, S. verfasserin aut Troncon, C. verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 52(2007), 3 vom: 26. Sept., Seite 743-758 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:52 year:2007 number:3 day:26 month:09 pages:743-758 https://dx.doi.org/10.1140/epjc/s10052-007-0415-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_267 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 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_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4338 33.50 ASE AR 52 2007 3 26 09 743-758
spelling	10.1140/epjc/s10052-007-0415-3 doi (DE-627)SPR008312095 (SPR)s10052-007-0415-3-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl De Sanctis, U. verfasserin aut Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses the potential of ATLAS to study supersymmetry in the “focus point” region of the parameter space of mSUGRA models. The potential to discover a deviation from standard model expectations with the first few $ fb^{-1} $ of LHC data was studied using the parametrized simulation of the ATLAS detector. Several signatures were considered, involving hard jets, large missing energy, and either b-tagged jets, opposite-sign isolated electron or muon pairs, or top quarks reconstructed exploiting their fully-hadronic decays. With only 1 $ fb^{-1} $ of data each of these signatures may allow for observing an excess of events over standard model expectations with a statistical significance exceeding five standard deviations. Furthermore, each of the two invariant mass distributions of the two leptons produced by the $\tilde\chi^0_3\rightarrow\tilde\chi^0_1 l^+ l^-$ and the $\tilde\chi^0_2\rightarrow\tilde\chi^0_1 l^+ l^-$ three-body decays has a kinematic endpoint that measures the difference between the masses of the parent and daughter neutralino. An analytical expression was derived for the shape of this distribution and was used to fit the simulated LHC data. A measurement of the $\tilde\chi^0_2-\tilde\chi^0_1$ and $\tilde\chi^0_3-\tilde\chi^0_1$ mass differences was obtained and this information was used to constrain the MSSM parameter space. Invariant Mass (dpeaa)DE-He213 Invariant Mass Distribution (dpeaa)DE-He213 Standard Model Background (dpeaa)DE-He213 Standard Model Expectation (dpeaa)DE-He213 Light SUSY Particle (dpeaa)DE-He213 Lari, T. verfasserin aut Montesano, S. verfasserin aut Troncon, C. verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 52(2007), 3 vom: 26. Sept., Seite 743-758 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:52 year:2007 number:3 day:26 month:09 pages:743-758 https://dx.doi.org/10.1140/epjc/s10052-007-0415-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_267 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 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_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4338 33.50 ASE AR 52 2007 3 26 09 743-758
allfields_unstemmed	10.1140/epjc/s10052-007-0415-3 doi (DE-627)SPR008312095 (SPR)s10052-007-0415-3-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl De Sanctis, U. verfasserin aut Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses the potential of ATLAS to study supersymmetry in the “focus point” region of the parameter space of mSUGRA models. The potential to discover a deviation from standard model expectations with the first few $ fb^{-1} $ of LHC data was studied using the parametrized simulation of the ATLAS detector. Several signatures were considered, involving hard jets, large missing energy, and either b-tagged jets, opposite-sign isolated electron or muon pairs, or top quarks reconstructed exploiting their fully-hadronic decays. With only 1 $ fb^{-1} $ of data each of these signatures may allow for observing an excess of events over standard model expectations with a statistical significance exceeding five standard deviations. Furthermore, each of the two invariant mass distributions of the two leptons produced by the $\tilde\chi^0_3\rightarrow\tilde\chi^0_1 l^+ l^-$ and the $\tilde\chi^0_2\rightarrow\tilde\chi^0_1 l^+ l^-$ three-body decays has a kinematic endpoint that measures the difference between the masses of the parent and daughter neutralino. An analytical expression was derived for the shape of this distribution and was used to fit the simulated LHC data. A measurement of the $\tilde\chi^0_2-\tilde\chi^0_1$ and $\tilde\chi^0_3-\tilde\chi^0_1$ mass differences was obtained and this information was used to constrain the MSSM parameter space. Invariant Mass (dpeaa)DE-He213 Invariant Mass Distribution (dpeaa)DE-He213 Standard Model Background (dpeaa)DE-He213 Standard Model Expectation (dpeaa)DE-He213 Light SUSY Particle (dpeaa)DE-He213 Lari, T. verfasserin aut Montesano, S. verfasserin aut Troncon, C. verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 52(2007), 3 vom: 26. Sept., Seite 743-758 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:52 year:2007 number:3 day:26 month:09 pages:743-758 https://dx.doi.org/10.1140/epjc/s10052-007-0415-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_267 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 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_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4338 33.50 ASE AR 52 2007 3 26 09 743-758
allfieldsGer	10.1140/epjc/s10052-007-0415-3 doi (DE-627)SPR008312095 (SPR)s10052-007-0415-3-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl De Sanctis, U. verfasserin aut Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses the potential of ATLAS to study supersymmetry in the “focus point” region of the parameter space of mSUGRA models. The potential to discover a deviation from standard model expectations with the first few $ fb^{-1} $ of LHC data was studied using the parametrized simulation of the ATLAS detector. Several signatures were considered, involving hard jets, large missing energy, and either b-tagged jets, opposite-sign isolated electron or muon pairs, or top quarks reconstructed exploiting their fully-hadronic decays. With only 1 $ fb^{-1} $ of data each of these signatures may allow for observing an excess of events over standard model expectations with a statistical significance exceeding five standard deviations. Furthermore, each of the two invariant mass distributions of the two leptons produced by the $\tilde\chi^0_3\rightarrow\tilde\chi^0_1 l^+ l^-$ and the $\tilde\chi^0_2\rightarrow\tilde\chi^0_1 l^+ l^-$ three-body decays has a kinematic endpoint that measures the difference between the masses of the parent and daughter neutralino. An analytical expression was derived for the shape of this distribution and was used to fit the simulated LHC data. A measurement of the $\tilde\chi^0_2-\tilde\chi^0_1$ and $\tilde\chi^0_3-\tilde\chi^0_1$ mass differences was obtained and this information was used to constrain the MSSM parameter space. Invariant Mass (dpeaa)DE-He213 Invariant Mass Distribution (dpeaa)DE-He213 Standard Model Background (dpeaa)DE-He213 Standard Model Expectation (dpeaa)DE-He213 Light SUSY Particle (dpeaa)DE-He213 Lari, T. verfasserin aut Montesano, S. verfasserin aut Troncon, C. verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 52(2007), 3 vom: 26. Sept., Seite 743-758 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:52 year:2007 number:3 day:26 month:09 pages:743-758 https://dx.doi.org/10.1140/epjc/s10052-007-0415-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_267 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 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_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4338 33.50 ASE AR 52 2007 3 26 09 743-758
allfieldsSound	10.1140/epjc/s10052-007-0415-3 doi (DE-627)SPR008312095 (SPR)s10052-007-0415-3-e DE-627 ger DE-627 rakwb eng 530 ASE 33.50 bkl De Sanctis, U. verfasserin aut Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC 2007 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses the potential of ATLAS to study supersymmetry in the “focus point” region of the parameter space of mSUGRA models. The potential to discover a deviation from standard model expectations with the first few $ fb^{-1} $ of LHC data was studied using the parametrized simulation of the ATLAS detector. Several signatures were considered, involving hard jets, large missing energy, and either b-tagged jets, opposite-sign isolated electron or muon pairs, or top quarks reconstructed exploiting their fully-hadronic decays. With only 1 $ fb^{-1} $ of data each of these signatures may allow for observing an excess of events over standard model expectations with a statistical significance exceeding five standard deviations. Furthermore, each of the two invariant mass distributions of the two leptons produced by the $\tilde\chi^0_3\rightarrow\tilde\chi^0_1 l^+ l^-$ and the $\tilde\chi^0_2\rightarrow\tilde\chi^0_1 l^+ l^-$ three-body decays has a kinematic endpoint that measures the difference between the masses of the parent and daughter neutralino. An analytical expression was derived for the shape of this distribution and was used to fit the simulated LHC data. A measurement of the $\tilde\chi^0_2-\tilde\chi^0_1$ and $\tilde\chi^0_3-\tilde\chi^0_1$ mass differences was obtained and this information was used to constrain the MSSM parameter space. Invariant Mass (dpeaa)DE-He213 Invariant Mass Distribution (dpeaa)DE-He213 Standard Model Background (dpeaa)DE-He213 Standard Model Expectation (dpeaa)DE-He213 Light SUSY Particle (dpeaa)DE-He213 Lari, T. verfasserin aut Montesano, S. verfasserin aut Troncon, C. verfasserin aut Enthalten in The European physical journal Berlin : Springer, 1998 52(2007), 3 vom: 26. Sept., Seite 743-758 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:52 year:2007 number:3 day:26 month:09 pages:743-758 https://dx.doi.org/10.1140/epjc/s10052-007-0415-3 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_206 GBV_ILN_267 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2007 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_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2068 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4338 33.50 ASE AR 52 2007 3 26 09 743-758
language	English
source	Enthalten in The European physical journal 52(2007), 3 vom: 26. Sept., Seite 743-758 volume:52 year:2007 number:3 day:26 month:09 pages:743-758
sourceStr	Enthalten in The European physical journal 52(2007), 3 vom: 26. Sept., Seite 743-758 volume:52 year:2007 number:3 day:26 month:09 pages:743-758
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Invariant Mass Invariant Mass Distribution Standard Model Background Standard Model Expectation Light SUSY Particle
dewey-raw	530
isfreeaccess_bool	false
container_title	The European physical journal
authorswithroles_txt_mv	De Sanctis, U. @@aut@@ Lari, T. @@aut@@ Montesano, S. @@aut@@ Troncon, C. @@aut@@
publishDateDaySort_date	2007-09-26T00:00:00Z
hierarchy_top_id	253722934
dewey-sort	3530
id	SPR008312095
language_de	englisch
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author	De Sanctis, U.
spellingShingle	De Sanctis, U. ddc 530 bkl 33.50 misc Invariant Mass misc Invariant Mass Distribution misc Standard Model Background misc Standard Model Expectation misc Light SUSY Particle Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC
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topic_title	530 ASE 33.50 bkl Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC Invariant Mass (dpeaa)DE-He213 Invariant Mass Distribution (dpeaa)DE-He213 Standard Model Background (dpeaa)DE-He213 Standard Model Expectation (dpeaa)DE-He213 Light SUSY Particle (dpeaa)DE-He213
topic	ddc 530 bkl 33.50 misc Invariant Mass misc Invariant Mass Distribution misc Standard Model Background misc Standard Model Expectation misc Light SUSY Particle
topic_unstemmed	ddc 530 bkl 33.50 misc Invariant Mass misc Invariant Mass Distribution misc Standard Model Background misc Standard Model Expectation misc Light SUSY Particle
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title	Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC
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title_full	Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC
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title_sort	perspectives for the detection and measurement of supersymmetry in the focus point region of msugra models with the atlas detector at lhc
title_auth	Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC
abstract	Abstract This paper discusses the potential of ATLAS to study supersymmetry in the “focus point” region of the parameter space of mSUGRA models. The potential to discover a deviation from standard model expectations with the first few $ fb^{-1} $ of LHC data was studied using the parametrized simulation of the ATLAS detector. Several signatures were considered, involving hard jets, large missing energy, and either b-tagged jets, opposite-sign isolated electron or muon pairs, or top quarks reconstructed exploiting their fully-hadronic decays. With only 1 $ fb^{-1} $ of data each of these signatures may allow for observing an excess of events over standard model expectations with a statistical significance exceeding five standard deviations. Furthermore, each of the two invariant mass distributions of the two leptons produced by the $\tilde\chi^0_3\rightarrow\tilde\chi^0_1 l^+ l^-$ and the $\tilde\chi^0_2\rightarrow\tilde\chi^0_1 l^+ l^-$ three-body decays has a kinematic endpoint that measures the difference between the masses of the parent and daughter neutralino. An analytical expression was derived for the shape of this distribution and was used to fit the simulated LHC data. A measurement of the $\tilde\chi^0_2-\tilde\chi^0_1$ and $\tilde\chi^0_3-\tilde\chi^0_1$ mass differences was obtained and this information was used to constrain the MSSM parameter space.
abstractGer	Abstract This paper discusses the potential of ATLAS to study supersymmetry in the “focus point” region of the parameter space of mSUGRA models. The potential to discover a deviation from standard model expectations with the first few $ fb^{-1} $ of LHC data was studied using the parametrized simulation of the ATLAS detector. Several signatures were considered, involving hard jets, large missing energy, and either b-tagged jets, opposite-sign isolated electron or muon pairs, or top quarks reconstructed exploiting their fully-hadronic decays. With only 1 $ fb^{-1} $ of data each of these signatures may allow for observing an excess of events over standard model expectations with a statistical significance exceeding five standard deviations. Furthermore, each of the two invariant mass distributions of the two leptons produced by the $\tilde\chi^0_3\rightarrow\tilde\chi^0_1 l^+ l^-$ and the $\tilde\chi^0_2\rightarrow\tilde\chi^0_1 l^+ l^-$ three-body decays has a kinematic endpoint that measures the difference between the masses of the parent and daughter neutralino. An analytical expression was derived for the shape of this distribution and was used to fit the simulated LHC data. A measurement of the $\tilde\chi^0_2-\tilde\chi^0_1$ and $\tilde\chi^0_3-\tilde\chi^0_1$ mass differences was obtained and this information was used to constrain the MSSM parameter space.
abstract_unstemmed	Abstract This paper discusses the potential of ATLAS to study supersymmetry in the “focus point” region of the parameter space of mSUGRA models. The potential to discover a deviation from standard model expectations with the first few $ fb^{-1} $ of LHC data was studied using the parametrized simulation of the ATLAS detector. Several signatures were considered, involving hard jets, large missing energy, and either b-tagged jets, opposite-sign isolated electron or muon pairs, or top quarks reconstructed exploiting their fully-hadronic decays. With only 1 $ fb^{-1} $ of data each of these signatures may allow for observing an excess of events over standard model expectations with a statistical significance exceeding five standard deviations. Furthermore, each of the two invariant mass distributions of the two leptons produced by the $\tilde\chi^0_3\rightarrow\tilde\chi^0_1 l^+ l^-$ and the $\tilde\chi^0_2\rightarrow\tilde\chi^0_1 l^+ l^-$ three-body decays has a kinematic endpoint that measures the difference between the masses of the parent and daughter neutralino. An analytical expression was derived for the shape of this distribution and was used to fit the simulated LHC data. A measurement of the $\tilde\chi^0_2-\tilde\chi^0_1$ and $\tilde\chi^0_3-\tilde\chi^0_1$ mass differences was obtained and this information was used to constrain the MSSM parameter space.
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title_short	Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC
url	https://dx.doi.org/10.1140/epjc/s10052-007-0415-3
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Perspectives for the detection and measurement of supersymmetry in the focus point region of mSUGRA models with the ATLAS detector at LHC

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