Charmonium spectral functions from 2+1 flavour lattice QCD

Szabolcs Borsányi; Stephan Dürr; Zoltán Fodor; Christian Hoelbling; Sándor D. Katz; Stefan Krieg; Simon Mages; Dániel Nógrádi; Attila Pásztor; Andreas Schäfer; Kálmán K. Szabó; Bálint C. Tóth; Norbert Trombitás

doi:10.1007/JHEP04(2014)132

Charmonium spectral functions from 2+1 flavour lattice QCD

Szabolcs Borsányi, Stephan Dürr, Zoltán Fodor, Christian Hoelbling, Sándor D. Katz, Stefan Krieg, Simon Mages, Dániel Nógrádi, Attila Pásztor, Andreas Schäfer, Kálmán K. Szabó, Bálint C. Tóth, Norbert Trombitás

Physics

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33 Scopus citations

Abstract

Finite temperature charmonium spectral functions in the pseudoscalar and vector channels are studied in lattice QCD with 2+1 flavours of dynamical Wilson quarks, on fine isotropic lattices (with a lattice spacing of 0.057fm), with a non-physical pion mass of m_φ ≡ 545 MeV. The highest temperature studied is approximately 1.4T_c. Up to this temperature no significant variation of the spectral function is seen in the pseudoscalar channel. The vector channel shows some temperature dependence, which seems to be consistent with a temperature dependent low frequency peak related to heavy quark transport, plus a temperature independent term at ω > 0. These results are in accord with previous calculations using the quenched approximation.

Original language	English (US)
Article number	132
Journal	Journal of High Energy Physics
Volume	2014
Issue number	4
DOIs	https://doi.org/10.1007/JHEP04(2014)132
State	Published - Apr 2014

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1007/JHEP04(2014)132

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title = "Charmonium spectral functions from 2+1 flavour lattice QCD",

abstract = "Finite temperature charmonium spectral functions in the pseudoscalar and vector channels are studied in lattice QCD with 2+1 flavours of dynamical Wilson quarks, on fine isotropic lattices (with a lattice spacing of 0.057fm), with a non-physical pion mass of mφ ≡ 545 MeV. The highest temperature studied is approximately 1.4Tc. Up to this temperature no significant variation of the spectral function is seen in the pseudoscalar channel. The vector channel shows some temperature dependence, which seems to be consistent with a temperature dependent low frequency peak related to heavy quark transport, plus a temperature independent term at ω > 0. These results are in accord with previous calculations using the quenched approximation.",

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AU - Borsányi, Szabolcs

AU - Dürr, Stephan

AU - Fodor, Zoltán

AU - Hoelbling, Christian

AU - Katz, Sándor D.

AU - Krieg, Stefan

AU - Mages, Simon

AU - Nógrádi, Dániel

AU - Pásztor, Attila

AU - Schäfer, Andreas

AU - Szabó, Kálmán K.

AU - Tóth, Bálint C.

AU - Trombitás, Norbert

PY - 2014/4

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AB - Finite temperature charmonium spectral functions in the pseudoscalar and vector channels are studied in lattice QCD with 2+1 flavours of dynamical Wilson quarks, on fine isotropic lattices (with a lattice spacing of 0.057fm), with a non-physical pion mass of mφ ≡ 545 MeV. The highest temperature studied is approximately 1.4Tc. Up to this temperature no significant variation of the spectral function is seen in the pseudoscalar channel. The vector channel shows some temperature dependence, which seems to be consistent with a temperature dependent low frequency peak related to heavy quark transport, plus a temperature independent term at ω > 0. These results are in accord with previous calculations using the quenched approximation.

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Charmonium spectral functions from 2+1 flavour lattice QCD

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