Bottomonium above Deconfinement in Lattice Nonrelativistic QCD

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. (2011) Bottomonium above Deconfinement in Lattice Nonrelativistic QCD. Physical Review Letters, 106 (061602). pp. 1-4. ISSN 1079-7114

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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.

Item Type: Article
Additional Information: 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).
Keywords: Bottomonium; Deconfinement; Lattice; Nonrelativistic; QCD;
Academic Unit: Faculty of Science and Engineering > Mathematical Physics
Item ID: 2604
Identification Number: DOI: 10.1103/PhysRevLett.106.061602
Depositing User: Dr. Jonivar Skullerud
Date Deposited: 07 Jul 2011 11:36
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
Refereed: Yes
Funders: National Research Foundation of Korea, U.S. Department of Energy Contract, Science Foundation Ireland, Research Executive Agency (REA) of the European Union

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