skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Impact of electromagnetism on phase structure for Wilson and twisted-mass fermions including isospin breaking

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1223028
Grant/Contract Number:
SC0011637
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 92; Journal Issue: 7; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Horkel, Derek P., and Sharpe, Stephen R. Impact of electromagnetism on phase structure for Wilson and twisted-mass fermions including isospin breaking. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.92.074501.
Horkel, Derek P., & Sharpe, Stephen R. Impact of electromagnetism on phase structure for Wilson and twisted-mass fermions including isospin breaking. United States. doi:10.1103/PhysRevD.92.074501.
Horkel, Derek P., and Sharpe, Stephen R. Tue . "Impact of electromagnetism on phase structure for Wilson and twisted-mass fermions including isospin breaking". United States. doi:10.1103/PhysRevD.92.074501.
@article{osti_1223028,
title = {Impact of electromagnetism on phase structure for Wilson and twisted-mass fermions including isospin breaking},
author = {Horkel, Derek P. and Sharpe, Stephen R.},
abstractNote = {},
doi = {10.1103/PhysRevD.92.074501},
journal = {Physical Review D},
number = 7,
volume = 92,
place = {United States},
year = {Tue Oct 06 00:00:00 EDT 2015},
month = {Tue Oct 06 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevD.92.074501

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

Save / Share:
  • Cited by 1
  • We present numerical results for the phase diagram of lattice QCD at finite temperature in the formulation with twisted mass Wilson fermions and a tree-level Symanzik-improved gauge action. Our simulations are performed on lattices with temporal extent N{sub {tau}}=8, and lattice coupling {beta} ranging from strong coupling to the scaling domain. Covering a wide range in the space spanned by the lattice coupling {beta} and the hopping and twisted mass parameters {kappa} and {mu}, respectively, we obtain a comprehensive picture of the rich phase structure of the lattice theory. In particular, we verify the existence of an Aoki phase inmore » the strong coupling region and the realization of the Sharpe-Singleton scenario at intermediate couplings. In the weak coupling region we identify the phase boundary for the physical finite temperature phase transition/crossover. Its shape in the three-dimensional parameter space is consistent with Creutz's conjecture of a cone-shaped thermal transition surface.« less
  • The pion masses and the pion decay constant are calculated to 1-loop order in SU(2) twisted mass Wilson chiral perturbation theory, assuming a large pion mass splitting and tuning to maximal twist. Taking the large mass splitting at leading order in the chiral expansion leads to significant modifications in the chiral logarithms. For example, the result for the charged pion mass contains a chiral logarithm that involves the neutral pion mass instead of the charged one. Similar modifications appear in the results for the neutral pion mass and the decay constant. These new results are used in fits to latticemore » data obtained recently by the European twisted mass collaboration. The data can be fitted well, in general better than with the standard chiral perturbation theory expressions that ignore the mass splitting. The impact on the extraction of low-energy couplings is briefly discussed.« less
  • We present data testing the existence of a parity-flavor-breaking phase in simulations of QCD with two flavors of light Wilson fermions. This is done by explicit simulations on lattice sizes of 6{sup 4}, 8{sup 4}, and 10{sup 4} for a variety of values of {beta} and {kappa} as well as the coefficient h of an explicit breaking term included in the action. We find that at {beta}=6/g{sup 2} equal to or greater than 5.0 extrapolation in the parameter h as well as in the lattice volume show no indication of a phase where parity and flavor are spontaneously broken inmore » the limit of zero h. {copyright} {ital 1997} {ital The American Physical Society}« less
  • Cited by 3