Screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential
Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Döring, M. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2006 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag 2006 |
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| Übergeordnetes Werk: |
Enthalten in: The European physical journal - Berlin : Springer, 1998, 46(2006), 1 vom: 03. Feb., Seite 179-189 |
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| Übergeordnetes Werk: |
volume:46 ; year:2006 ; number:1 ; day:03 ; month:02 ; pages:179-189 |
| Links: |
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| DOI / URN: |
10.1140/epjc/s2005-02462-y |
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| Katalog-ID: |
SPR008306281 |
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| 100 | 1 | |a Döring, M. |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential |
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| 520 | |a Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of about 770 MeV and is thus not in the range of physical quark masses but the quark mass dependence is known to be small above Tc. At Nτ = 4 the lattices are coarse, however, we are using improved (p4 staggered) fermions. The Taylor expansion coefficients of color singlet and color averaged free energies are calculated and from this the expansion coefficients for the corresponding screening masses are determined. We find that for small $ μ_{b} $ the free energies of a static quark-antiquark pair decrease in a medium with a net excess of quarks and that screening is well described by a screening mass which increases with increasing $ μ_{b} $. The $ μ_{b} $-dependent corrections to the screening masses are well described by perturbation theory for T ≳ 2Tc. In particular, we find for all temperatures above Tc that the expansion coefficients for singlet and color averaged screening masses differ by a factor 2. PACS. 11.15.Ha, 11.10.Wx, 12.38Gc, 12.38.Mh | ||
| 650 | 4 | |a Expansion Coefficient |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Quark Mass |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Screening Masse |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Pion Mass |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Color Singlet |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Ejiri, S. |4 aut | |
| 700 | 1 | |a Kaczmarek, O. |4 aut | |
| 700 | 1 | |a Karsch, F. |4 aut | |
| 700 | 1 | |a Laermann, E. |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t The European physical journal |d Berlin : Springer, 1998 |g 46(2006), 1 vom: 03. Feb., Seite 179-189 |w (DE-627)253722934 |w (DE-600)1459069-4 |x 1434-6052 |7 nnns |
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10.1140/epjc/s2005-02462-y doi (DE-627)SPR008306281 (SPR)s2005-02462-y-e DE-627 ger DE-627 rakwb eng Döring, M. verfasserin aut Screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2006 Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of about 770 MeV and is thus not in the range of physical quark masses but the quark mass dependence is known to be small above Tc. At Nτ = 4 the lattices are coarse, however, we are using improved (p4 staggered) fermions. The Taylor expansion coefficients of color singlet and color averaged free energies are calculated and from this the expansion coefficients for the corresponding screening masses are determined. We find that for small $ μ_{b} $ the free energies of a static quark-antiquark pair decrease in a medium with a net excess of quarks and that screening is well described by a screening mass which increases with increasing $ μ_{b} $. The $ μ_{b} $-dependent corrections to the screening masses are well described by perturbation theory for T ≳ 2Tc. In particular, we find for all temperatures above Tc that the expansion coefficients for singlet and color averaged screening masses differ by a factor 2. PACS. 11.15.Ha, 11.10.Wx, 12.38Gc, 12.38.Mh Expansion Coefficient (dpeaa)DE-He213 Quark Mass (dpeaa)DE-He213 Screening Masse (dpeaa)DE-He213 Pion Mass (dpeaa)DE-He213 Color Singlet (dpeaa)DE-He213 Ejiri, S. aut Kaczmarek, O. aut Karsch, F. aut Laermann, E. aut Enthalten in The European physical journal Berlin : Springer, 1998 46(2006), 1 vom: 03. Feb., Seite 179-189 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:46 year:2006 number:1 day:03 month:02 pages:179-189 https://dx.doi.org/10.1140/epjc/s2005-02462-y 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 AR 46 2006 1 03 02 179-189 |
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10.1140/epjc/s2005-02462-y doi (DE-627)SPR008306281 (SPR)s2005-02462-y-e DE-627 ger DE-627 rakwb eng Döring, M. verfasserin aut Screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2006 Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of about 770 MeV and is thus not in the range of physical quark masses but the quark mass dependence is known to be small above Tc. At Nτ = 4 the lattices are coarse, however, we are using improved (p4 staggered) fermions. The Taylor expansion coefficients of color singlet and color averaged free energies are calculated and from this the expansion coefficients for the corresponding screening masses are determined. We find that for small $ μ_{b} $ the free energies of a static quark-antiquark pair decrease in a medium with a net excess of quarks and that screening is well described by a screening mass which increases with increasing $ μ_{b} $. The $ μ_{b} $-dependent corrections to the screening masses are well described by perturbation theory for T ≳ 2Tc. In particular, we find for all temperatures above Tc that the expansion coefficients for singlet and color averaged screening masses differ by a factor 2. PACS. 11.15.Ha, 11.10.Wx, 12.38Gc, 12.38.Mh Expansion Coefficient (dpeaa)DE-He213 Quark Mass (dpeaa)DE-He213 Screening Masse (dpeaa)DE-He213 Pion Mass (dpeaa)DE-He213 Color Singlet (dpeaa)DE-He213 Ejiri, S. aut Kaczmarek, O. aut Karsch, F. aut Laermann, E. aut Enthalten in The European physical journal Berlin : Springer, 1998 46(2006), 1 vom: 03. Feb., Seite 179-189 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:46 year:2006 number:1 day:03 month:02 pages:179-189 https://dx.doi.org/10.1140/epjc/s2005-02462-y 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 AR 46 2006 1 03 02 179-189 |
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10.1140/epjc/s2005-02462-y doi (DE-627)SPR008306281 (SPR)s2005-02462-y-e DE-627 ger DE-627 rakwb eng Döring, M. verfasserin aut Screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2006 Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of about 770 MeV and is thus not in the range of physical quark masses but the quark mass dependence is known to be small above Tc. At Nτ = 4 the lattices are coarse, however, we are using improved (p4 staggered) fermions. The Taylor expansion coefficients of color singlet and color averaged free energies are calculated and from this the expansion coefficients for the corresponding screening masses are determined. We find that for small $ μ_{b} $ the free energies of a static quark-antiquark pair decrease in a medium with a net excess of quarks and that screening is well described by a screening mass which increases with increasing $ μ_{b} $. The $ μ_{b} $-dependent corrections to the screening masses are well described by perturbation theory for T ≳ 2Tc. In particular, we find for all temperatures above Tc that the expansion coefficients for singlet and color averaged screening masses differ by a factor 2. PACS. 11.15.Ha, 11.10.Wx, 12.38Gc, 12.38.Mh Expansion Coefficient (dpeaa)DE-He213 Quark Mass (dpeaa)DE-He213 Screening Masse (dpeaa)DE-He213 Pion Mass (dpeaa)DE-He213 Color Singlet (dpeaa)DE-He213 Ejiri, S. aut Kaczmarek, O. aut Karsch, F. aut Laermann, E. aut Enthalten in The European physical journal Berlin : Springer, 1998 46(2006), 1 vom: 03. Feb., Seite 179-189 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:46 year:2006 number:1 day:03 month:02 pages:179-189 https://dx.doi.org/10.1140/epjc/s2005-02462-y 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 AR 46 2006 1 03 02 179-189 |
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10.1140/epjc/s2005-02462-y doi (DE-627)SPR008306281 (SPR)s2005-02462-y-e DE-627 ger DE-627 rakwb eng Döring, M. verfasserin aut Screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2006 Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of about 770 MeV and is thus not in the range of physical quark masses but the quark mass dependence is known to be small above Tc. At Nτ = 4 the lattices are coarse, however, we are using improved (p4 staggered) fermions. The Taylor expansion coefficients of color singlet and color averaged free energies are calculated and from this the expansion coefficients for the corresponding screening masses are determined. We find that for small $ μ_{b} $ the free energies of a static quark-antiquark pair decrease in a medium with a net excess of quarks and that screening is well described by a screening mass which increases with increasing $ μ_{b} $. The $ μ_{b} $-dependent corrections to the screening masses are well described by perturbation theory for T ≳ 2Tc. In particular, we find for all temperatures above Tc that the expansion coefficients for singlet and color averaged screening masses differ by a factor 2. PACS. 11.15.Ha, 11.10.Wx, 12.38Gc, 12.38.Mh Expansion Coefficient (dpeaa)DE-He213 Quark Mass (dpeaa)DE-He213 Screening Masse (dpeaa)DE-He213 Pion Mass (dpeaa)DE-He213 Color Singlet (dpeaa)DE-He213 Ejiri, S. aut Kaczmarek, O. aut Karsch, F. aut Laermann, E. aut Enthalten in The European physical journal Berlin : Springer, 1998 46(2006), 1 vom: 03. Feb., Seite 179-189 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:46 year:2006 number:1 day:03 month:02 pages:179-189 https://dx.doi.org/10.1140/epjc/s2005-02462-y 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 AR 46 2006 1 03 02 179-189 |
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10.1140/epjc/s2005-02462-y doi (DE-627)SPR008306281 (SPR)s2005-02462-y-e DE-627 ger DE-627 rakwb eng Döring, M. verfasserin aut Screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2006 Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of about 770 MeV and is thus not in the range of physical quark masses but the quark mass dependence is known to be small above Tc. At Nτ = 4 the lattices are coarse, however, we are using improved (p4 staggered) fermions. The Taylor expansion coefficients of color singlet and color averaged free energies are calculated and from this the expansion coefficients for the corresponding screening masses are determined. We find that for small $ μ_{b} $ the free energies of a static quark-antiquark pair decrease in a medium with a net excess of quarks and that screening is well described by a screening mass which increases with increasing $ μ_{b} $. The $ μ_{b} $-dependent corrections to the screening masses are well described by perturbation theory for T ≳ 2Tc. In particular, we find for all temperatures above Tc that the expansion coefficients for singlet and color averaged screening masses differ by a factor 2. PACS. 11.15.Ha, 11.10.Wx, 12.38Gc, 12.38.Mh Expansion Coefficient (dpeaa)DE-He213 Quark Mass (dpeaa)DE-He213 Screening Masse (dpeaa)DE-He213 Pion Mass (dpeaa)DE-He213 Color Singlet (dpeaa)DE-He213 Ejiri, S. aut Kaczmarek, O. aut Karsch, F. aut Laermann, E. aut Enthalten in The European physical journal Berlin : Springer, 1998 46(2006), 1 vom: 03. Feb., Seite 179-189 (DE-627)253722934 (DE-600)1459069-4 1434-6052 nnns volume:46 year:2006 number:1 day:03 month:02 pages:179-189 https://dx.doi.org/10.1140/epjc/s2005-02462-y 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 AR 46 2006 1 03 02 179-189 |
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Döring, M. Ejiri, S. Kaczmarek, O. Karsch, F. Laermann, E. |
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Elektronische Aufsätze |
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Döring, M. |
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10.1140/epjc/s2005-02462-y |
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screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential |
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Screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential |
| abstract |
Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of about 770 MeV and is thus not in the range of physical quark masses but the quark mass dependence is known to be small above Tc. At Nτ = 4 the lattices are coarse, however, we are using improved (p4 staggered) fermions. The Taylor expansion coefficients of color singlet and color averaged free energies are calculated and from this the expansion coefficients for the corresponding screening masses are determined. We find that for small $ μ_{b} $ the free energies of a static quark-antiquark pair decrease in a medium with a net excess of quarks and that screening is well described by a screening mass which increases with increasing $ μ_{b} $. The $ μ_{b} $-dependent corrections to the screening masses are well described by perturbation theory for T ≳ 2Tc. In particular, we find for all temperatures above Tc that the expansion coefficients for singlet and color averaged screening masses differ by a factor 2. PACS. 11.15.Ha, 11.10.Wx, 12.38Gc, 12.38.Mh © Springer-Verlag 2006 |
| abstractGer |
Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of about 770 MeV and is thus not in the range of physical quark masses but the quark mass dependence is known to be small above Tc. At Nτ = 4 the lattices are coarse, however, we are using improved (p4 staggered) fermions. The Taylor expansion coefficients of color singlet and color averaged free energies are calculated and from this the expansion coefficients for the corresponding screening masses are determined. We find that for small $ μ_{b} $ the free energies of a static quark-antiquark pair decrease in a medium with a net excess of quarks and that screening is well described by a screening mass which increases with increasing $ μ_{b} $. The $ μ_{b} $-dependent corrections to the screening masses are well described by perturbation theory for T ≳ 2Tc. In particular, we find for all temperatures above Tc that the expansion coefficients for singlet and color averaged screening masses differ by a factor 2. PACS. 11.15.Ha, 11.10.Wx, 12.38Gc, 12.38.Mh © Springer-Verlag 2006 |
| abstract_unstemmed |
Abstract. We analyze the dependence of heavy quark free energies on the baryon chemical potential $ μ_{b} $ in 2-flavor QCD by performing a 6th order Taylor expansion in the chemical potential which circumvents the sign problem. The bare quark mass at $\hat m / T = 0.4$ corresponds to a pion mass of about 770 MeV and is thus not in the range of physical quark masses but the quark mass dependence is known to be small above Tc. At Nτ = 4 the lattices are coarse, however, we are using improved (p4 staggered) fermions. The Taylor expansion coefficients of color singlet and color averaged free energies are calculated and from this the expansion coefficients for the corresponding screening masses are determined. We find that for small $ μ_{b} $ the free energies of a static quark-antiquark pair decrease in a medium with a net excess of quarks and that screening is well described by a screening mass which increases with increasing $ μ_{b} $. The $ μ_{b} $-dependent corrections to the screening masses are well described by perturbation theory for T ≳ 2Tc. In particular, we find for all temperatures above Tc that the expansion coefficients for singlet and color averaged screening masses differ by a factor 2. PACS. 11.15.Ha, 11.10.Wx, 12.38Gc, 12.38.Mh © Springer-Verlag 2006 |
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Screening of heavy quark free energies at finite temperatureand non-zero baryon chemical potential |
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