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Title: The topological susceptibility in finite temperature QCD and axion cosmology

Abstract

We study the topological susceptibility in 2+1 flavor QCD above the chiral crossover transition temperature using Highly Improved Staggered Quark action and several lattice spacings corresponding to temporal extent of the lattice, Nτ=6,8,10 and 12. We observe very distinct temperature dependences of the topological susceptibility in the ranges above and below 250MeV. While for temperatures above 250MeV, the dependence is found to be consistent with dilute instanton gas approximation, at lower temperatures the fall-off of topological susceptibility is milder. We discuss the consequence of our results for cosmology wherein we estimate the bounds on the axion decay constant and the oscillation temperature if indeed the QCD axion is a possible dark matter candidate.

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1328256
Alternate Identifier(s):
OSTI ID: 1376101
Report Number(s):
BNL-113932-2017-JA
Journal ID: ISSN 0370-2693; S0370269316305718; PII: S0370269316305718
Grant/Contract Number:  
SC0012704
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Name: Physics Letters B Journal Volume: 762 Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Petreczky, Peter, Schadler, Hans-Peter, and Sharma, Sayantan. The topological susceptibility in finite temperature QCD and axion cosmology. Netherlands: N. p., 2016. Web. doi:10.1016/j.physletb.2016.09.063.
Petreczky, Peter, Schadler, Hans-Peter, & Sharma, Sayantan. The topological susceptibility in finite temperature QCD and axion cosmology. Netherlands. doi:10.1016/j.physletb.2016.09.063.
Petreczky, Peter, Schadler, Hans-Peter, and Sharma, Sayantan. Tue . "The topological susceptibility in finite temperature QCD and axion cosmology". Netherlands. doi:10.1016/j.physletb.2016.09.063.
@article{osti_1328256,
title = {The topological susceptibility in finite temperature QCD and axion cosmology},
author = {Petreczky, Peter and Schadler, Hans-Peter and Sharma, Sayantan},
abstractNote = {We study the topological susceptibility in 2+1 flavor QCD above the chiral crossover transition temperature using Highly Improved Staggered Quark action and several lattice spacings corresponding to temporal extent of the lattice, Nτ=6,8,10 and 12. We observe very distinct temperature dependences of the topological susceptibility in the ranges above and below 250MeV. While for temperatures above 250MeV, the dependence is found to be consistent with dilute instanton gas approximation, at lower temperatures the fall-off of topological susceptibility is milder. We discuss the consequence of our results for cosmology wherein we estimate the bounds on the axion decay constant and the oscillation temperature if indeed the QCD axion is a possible dark matter candidate.},
doi = {10.1016/j.physletb.2016.09.063},
journal = {Physics Letters B},
number = C,
volume = 762,
place = {Netherlands},
year = {2016},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2016.09.063

Citation Metrics:
Cited by: 21 works
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