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Title :The order of the deconfinement phase transition in a heavy quark mass region
Authors :Saito, H.
Aoki, S.
Kanaya, K.
Ohno, H.
Ejiri, S.
Hatsuda, T.
Maezawa, Y.
Umeda, T.
WHOT-QCD Collaboration
Publisher :SISSA
Issue Date :Jul-2010
Journal Title :PoS - Proceedings of Science
Volume :Lattice2010
Issue :212
Start Page :1
End Page :7
ISSN :1824-8039
Description :The XXVIII Internaitonal Symposium on Lattice Field Theory, Lattice2010 July 14-19, 2010 Villasimius, Italy
Abstract :We study the quark mass dependence of the QCD phase transition by an effective potential defined through the distribution function of observables. As a test of the method, we study the first order deconfinement phase transition in the heavy quark mass limit and its fate at lighter quark masses. We confirm that the distribution function for the plaquette has two peaks indicating that the phase transition is of first order in the heavy quark limit. We then study the quark mass dependence of the distribution function by a reweighting method combined with the hopping parameter expansion. We find that the first order transition turns into a crossover as the quark mass decreases. We determine the critical point for the cases of Nf = 1, 2, 3 and 2+1. We find that the probability distribution function provides us with a powerful tool to study the order of transitions.
Type Local :会議発表論文
Language :eng
Format :application/pdf
URI :http://hdl.handle.net/10191/27696
fullTextURL :http://dspace.lib.niigata-u.ac.jp/dspace/bitstream/10191/27696/1/Lattice 2010_212.pdf
Rights :© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
Appears in Collections:99 その他学会発表資料

Please use this identifier to cite or link to this item: http://hdl.handle.net/10191/27696