Role of vector interaction and axial anomaly in the PNJL modeling of the QCD phase diagram

Nino Bratovic; Tetsuo Hatsuda; Wolfram Weise

doi:10.1016/j.physletb.2013.01.003

Role of vector interaction and axial anomaly in the PNJL modeling of the QCD phase diagram

Nino Bratovic
, Tetsuo Hatsuda
, Wolfram Weise

Department of Physics

Technical University of Munich
Riken
ECT

Research output: Contribution to journal › Article › peer-review

126 Scopus citations

Abstract

Effects of a flavor singlet vector interaction in the Polyakov-Nambu-Jona-Lasinio (PNJL) Model are studied in combination with the axial U(1) breaking Kobayashi-Maskawa-'t Hooft interaction, using an improved, consistent cutoff scheme. We confirm that the first-order chiral phase transition at moderate baryon chemical potentials and its critical point, a generic feature of NJL-type models without vector coupling, disappear for sufficiently large vector coupling strength g_v. New results are presented concerning the curvature of the crossover boundary in the T-μ plane close to μ=0 and its dependence on g_v.

Original language	English
Pages (from-to)	131-135
Number of pages	5
Journal	Physics Letters B
Volume	719
Issue number	1-3
DOIs	https://doi.org/10.1016/j.physletb.2013.01.003
State	Published - 12 Feb 2013

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title = "Role of vector interaction and axial anomaly in the PNJL modeling of the QCD phase diagram",

abstract = "Effects of a flavor singlet vector interaction in the Polyakov-Nambu-Jona-Lasinio (PNJL) Model are studied in combination with the axial U(1) breaking Kobayashi-Maskawa-'t Hooft interaction, using an improved, consistent cutoff scheme. We confirm that the first-order chiral phase transition at moderate baryon chemical potentials and its critical point, a generic feature of NJL-type models without vector coupling, disappear for sufficiently large vector coupling strength gv. New results are presented concerning the curvature of the crossover boundary in the T-μ plane close to μ=0 and its dependence on gv.",

author = "Nino Bratovic and Tetsuo Hatsuda and Wolfram Weise",

note = "Funding Information: This work was supported in part by BMBF , GSI , the DFG Excellence Cluster “Origin and Structure of the Universe” , and by JSPS grant No. 22340052 . Useful and stimulating discussions with Kenji Fukushima, Thomas Hell and Jan Pawlowski are gratefully acknowledged. Two of us (N.B. and W.W.) thank the RIKEN Nishina Center for kind hospitality; N.B. thanks for support by the RIKEN IPA program and the TUM Graduate School .",

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doi = "10.1016/j.physletb.2013.01.003",

language = "English",

volume = "719",

pages = "131--135",

journal = "Physics Letters B",

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TY - JOUR

T1 - Role of vector interaction and axial anomaly in the PNJL modeling of the QCD phase diagram

AU - Bratovic, Nino

AU - Hatsuda, Tetsuo

AU - Weise, Wolfram

N1 - Funding Information: This work was supported in part by BMBF , GSI , the DFG Excellence Cluster “Origin and Structure of the Universe” , and by JSPS grant No. 22340052 . Useful and stimulating discussions with Kenji Fukushima, Thomas Hell and Jan Pawlowski are gratefully acknowledged. Two of us (N.B. and W.W.) thank the RIKEN Nishina Center for kind hospitality; N.B. thanks for support by the RIKEN IPA program and the TUM Graduate School .

PY - 2013/2/12

Y1 - 2013/2/12

N2 - Effects of a flavor singlet vector interaction in the Polyakov-Nambu-Jona-Lasinio (PNJL) Model are studied in combination with the axial U(1) breaking Kobayashi-Maskawa-'t Hooft interaction, using an improved, consistent cutoff scheme. We confirm that the first-order chiral phase transition at moderate baryon chemical potentials and its critical point, a generic feature of NJL-type models without vector coupling, disappear for sufficiently large vector coupling strength gv. New results are presented concerning the curvature of the crossover boundary in the T-μ plane close to μ=0 and its dependence on gv.

AB - Effects of a flavor singlet vector interaction in the Polyakov-Nambu-Jona-Lasinio (PNJL) Model are studied in combination with the axial U(1) breaking Kobayashi-Maskawa-'t Hooft interaction, using an improved, consistent cutoff scheme. We confirm that the first-order chiral phase transition at moderate baryon chemical potentials and its critical point, a generic feature of NJL-type models without vector coupling, disappear for sufficiently large vector coupling strength gv. New results are presented concerning the curvature of the crossover boundary in the T-μ plane close to μ=0 and its dependence on gv.

UR - https://www.scopus.com/pages/publications/84873138535

U2 - 10.1016/j.physletb.2013.01.003

DO - 10.1016/j.physletb.2013.01.003

M3 - Article

AN - SCOPUS:84873138535

SN - 0370-2693

VL - 719

SP - 131

EP - 135

JO - Physics Letters B

JF - Physics Letters B

IS - 1-3

ER -

Role of vector interaction and axial anomaly in the PNJL modeling of the QCD phase diagram

Abstract

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