Aarts, G. and Kim, S. and Lombardo, M. P. and Oktay, M. B. and Ryan, S. M. and Sinclair, D. K. and Skullerud, J.-I.
Bottomonium above Deconfinement in Lattice Nonrelativistic QCD.
Physical Review Letters, 106 (061602).
We study the temperature dependence of bottomonium for temperatures in the range 0:4Tc <T <2:1Tc, using nonrelativistic dynamics for the bottom quark and full relativistic lattice QCD simulations for Nf = 2 light flavors on a highly anisotropic lattice. We find that the У is insensitive to the temperature in this range, while the Xb propagators show a crossover from the exponential decay characterizing the hadronic phase to a power-law behavior consistent with nearly free dynamics at T ≈ 2Tc.
||M. P. L. thanks Helmut Satz, Peter Petreczky, and participants
in the ‘‘In Media’’ group of the Quarkonium
Working Group for fruitful discussions. S. K. and M. P. L.
thank the Yukawa Institute of Theoretical Physics, Kyoto,
and G. A. and M. P. L. thank Trinity College Dublin and the
National University of Ireland Maynooth, for their hospitality.
S.M.R. and J. I. S. are grateful to the Trinity Centre
for High-Performance Computing for their support. G. A.
is supported by STFC. S. K. is supported by the National
Research Foundation of Korea grant funded by the Korea
government (MEST) No. 2010-0022219. D.K. S. is supported
in part by U.S. Department of Energy Contract
No. DE-AC02-06CH11357. J. I. S. is supported by
Science Foundation Ireland Grant No. 08-RFP-PHY1462.
S. M. R. is supported by the Research Executive Agency
(REA) of the European Union under Grant Agreement
No. PITN-GA-2009-238353 (ITN STRONGnet).
||Bottomonium; Deconfinement; Lattice; Nonrelativistic; QCD;
||Science & Engineering > Mathematical Physics
Dr. Jonivar Skullerud
||07 Jul 2011 11:36
|Journal or Publication Title:
||Physical Review Letters
||American Physical Society
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