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Lattice QCD with small number of flavours

Irbäck, A. LU orcid ; Karsch, F. ; Petersson, B. and Wyld, H. W. (1989) In Physics Letters B 216(1-2). p.177-183
Abstract

The finite temperature behaviour of lattice QCD with dynamical quarks for small number of flavours Nf is investigated. Simulations have been performed on lattices of size N3σ·4 with Nσ=8 and 12 and staggered fermions of mass ma=0.1 using a hybrid algorithm. We find that the two state signal at the critical point of the pure gauge theory, which is taken as sign for a fiorst order phase transition, persists for the values of Nf we have investigated, namely Nf=0.5, 1 and 2. It is, however, considerably weaker for Nf=1 and 2. Moreover, for Nf=2 the discontinuity at βc decreases with increasing lattice size. Thid puts doubt o order nature of... (More)

The finite temperature behaviour of lattice QCD with dynamical quarks for small number of flavours Nf is investigated. Simulations have been performed on lattices of size N3σ·4 with Nσ=8 and 12 and staggered fermions of mass ma=0.1 using a hybrid algorithm. We find that the two state signal at the critical point of the pure gauge theory, which is taken as sign for a fiorst order phase transition, persists for the values of Nf we have investigated, namely Nf=0.5, 1 and 2. It is, however, considerably weaker for Nf=1 and 2. Moreover, for Nf=2 the discontinuity at βc decreases with increasing lattice size. Thid puts doubt o order nature of the Nf=2 transition at intermediate masses.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics Letters B
volume
216
issue
1-2
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:45249130086
ISSN
0370-2693
DOI
10.1016/0370-2693(89)91391-9
language
English
LU publication?
yes
id
250e762a-5f2c-4dea-a0d3-8cb802eb29c1
date added to LUP
2019-05-14 15:12:50
date last changed
2024-01-01 04:32:10
@article{250e762a-5f2c-4dea-a0d3-8cb802eb29c1,
  abstract     = {{<p>The finite temperature behaviour of lattice QCD with dynamical quarks for small number of flavours N<sub>f</sub> is investigated. Simulations have been performed on lattices of size N<sup>3</sup><sub>σ</sub>·4 with N<sub>σ</sub>=8 and 12 and staggered fermions of mass ma=0.1 using a hybrid algorithm. We find that the two state signal at the critical point of the pure gauge theory, which is taken as sign for a fiorst order phase transition, persists for the values of N<sub>f</sub> we have investigated, namely N<sub>f</sub>=0.5, 1 and 2. It is, however, considerably weaker for N<sub>f</sub>=1 and 2. Moreover, for N<sub>f</sub>=2 the discontinuity at β<sub>c</sub> decreases with increasing lattice size. Thid puts doubt o order nature of the N<sub>f</sub>=2 transition at intermediate masses.</p>}},
  author       = {{Irbäck, A. and Karsch, F. and Petersson, B. and Wyld, H. W.}},
  issn         = {{0370-2693}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{1-2}},
  pages        = {{177--183}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters B}},
  title        = {{Lattice QCD with small number of flavours}},
  url          = {{http://dx.doi.org/10.1016/0370-2693(89)91391-9}},
  doi          = {{10.1016/0370-2693(89)91391-9}},
  volume       = {{216}},
  year         = {{1989}},
}