An effective QCD Lagrangian in the presence of an axial chemical potential

被引:47
作者
Andrianov, A. A. [1 ,2 ,3 ]
Espriu, D. [2 ,3 ]
Planells, X. [2 ,3 ]
机构
[1] St Petersburg State Univ, VA Fock Dept Theoret Phys, St Petersburg 198504, Russia
[2] Univ Barcelona, Dept Estruct & Constituents Mat, E-08028 Barcelona, Spain
[3] Univ Barcelona, Inst Ciencies Cosmos ICCUB, E-08028 Barcelona, Spain
来源
EUROPEAN PHYSICAL JOURNAL C | 2013年 / 73卷 / 01期
关键词
MASS INEQUALITIES; PARITY VIOLATION; P-VIOLATION;
D O I
10.1140/epjc/s10052-013-2294-0
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We consider the low energy realization of QCD in terms of mesons when an axial chemical potential is present; a situation that may be relevant in heavy ion collisions. We shall demonstrate that the presence of an axial charge has profound consequences on meson physics. The most notorious effect is the appearance of an explicit source of parity breaking. The eigenstates of strong interactions do not have a definite parity and interactions that would otherwise be forbidden compete with the familiar ones. In this work we focus on scalars and pseudoscalars that are described by a generalized linear sigma model. We comment briefly on the screening role of axial vectors in formation of effective axial charge and on the possible experimental relevance of our results, whose consequences may have been already seen at RHIC.
引用
收藏
页码:1 / 10
页数:10
相关论文
共 45 条
  • [1] Azimuthal Charged-Particle Correlations and Possible Local Strong Parity Violation
    Abelev, B. I.
    Aggarwal, M. M.
    Ahammed, Z.
    Alakhverdyants, A. V.
    Anderson, B. D.
    Arkhipkin, D.
    Averichev, G. S.
    Balewski, J.
    Barannikova, O.
    Barnby, L. S.
    Baumgart, S.
    Beavis, D. R.
    Bellwied, R.
    Benedosso, F.
    Betancourt, M. J.
    Betts, R. R.
    Bhasin, A.
    Bhati, A. K.
    Bichsel, H.
    Bielcik, J.
    Bielcikova, J.
    Biritz, B.
    Bland, L. C.
    Bnzarov, I.
    Bonner, B. E.
    Bouchet, J.
    Braidot, E.
    Brandin, A. V.
    Bridgeman, A.
    Bruna, E.
    Bueltmann, S.
    Burton, T. P.
    Cai, X. Z.
    Caines, H.
    Sanchez, M. Calderon de la Barca
    Catu, O.
    Cebra, D.
    Cendejas, R.
    Cervantes, M. C.
    Chajecki, Z.
    Chaloupka, P.
    Chattopadhyay, S.
    Chen, H. F.
    Chen, J. H.
    Chen, J. Y.
    Cheng, J.
    Cherney, M.
    Chikanian, A.
    Choi, K. E.
    Christie, W.
    [J]. PHYSICAL REVIEW LETTERS, 2009, 103 (25)
  • [2] Detailed measurement of the e+e- pair continuum in p plus p and Au plus Au collisions at √sNN=200 GeV and implications for direct photon production
    Adare, A.
    Afanasiev, S.
    Aidala, C.
    Ajitanand, N. N.
    Akiba, Y.
    Al-Bataineh, H.
    Alexander, J.
    Al-Jamel, A.
    Aoki, K.
    Aphecetche, L.
    Armendariz, R.
    Aronson, S. H.
    Asai, J.
    Atomssa, E. T.
    Averbeck, R.
    Awes, T. C.
    Azmoun, B.
    Babintsev, V.
    Baksay, G.
    Baksay, L.
    Baldisseri, A.
    Barish, K. N.
    Barnes, P. D.
    Bassalleck, B.
    Bathe, S.
    Batsouli, S.
    Baublis, V.
    Bauer, F.
    Bazilevsky, A.
    Belikov, S.
    Bennett, R.
    Berdnikov, Y.
    Bickley, A. A.
    Bjorndal, M. T.
    Boissevain, J. G.
    Borel, H.
    Boyle, K.
    Brooks, M. L.
    Brown, D. S.
    Bucher, D.
    Buesching, H.
    Bumazhnov, V.
    Bunce, G.
    Burward-Hoy, J. M.
    Butsyk, S.
    Campbell, S.
    Chai, J-S.
    Chang, B. S.
    Charvet, J-L.
    Chernichenko, S.
    [J]. PHYSICAL REVIEW C, 2010, 81 (03)
  • [3] On the possibility of P-violation at finite baryon-number densities
    Andrianov, A. A.
    Espriu, D.
    [J]. PHYSICS LETTERS B, 2008, 663 (05) : 450 - 455
  • [4] Dilepton excess from local parity breaking in baryon matter
    Andrianov, A. A.
    Andrianov, V. A.
    Espriu, D.
    Planells, X.
    [J]. PHYSICS LETTERS B, 2012, 710 (01) : 230 - 235
  • [5] Abnormal dilepton yield from parity breaking in dense nuclear matter
    Andrianov, A. A.
    Andrianov, V. A.
    Espriu, D.
    Planells, X.
    [J]. IX INTERNATIONAL CONFERENCE ON QUARK CONFINEMENT AND THE HADRON SPECTRUM (QCHS IX), 2011, 1343 : 450 - 452
  • [6] Spontaneous P-violation in QCD in extreme conditions
    Andrianov, A. A.
    Espriu, D.
    Andrianov, V. A.
    [J]. PHYSICS LETTERS B, 2009, 678 (04) : 416 - 421
  • [7] Andrianov A.A., 2010, POS QFTHEP2010, P053
  • [8] [Anonymous], 2009, PoS
  • [9] NA60 results on thermal dimuons
    Arnaldi, R.
    Banicz, K.
    Borer, K.
    Castor, J.
    Chaurand, B.
    Chen, W.
    Cicalo, C.
    Colla, A.
    Cortese, P.
    Damjanovic, S.
    David, A.
    de Falco, A.
    Devaux, A.
    Ducroux, L.
    En'yo, H.
    Fargeix, J.
    Ferretti, A.
    Floris, M.
    Foerster, A.
    Force, P.
    Guettet, N.
    Guichard, A.
    Gulkanian, H.
    Heuser, J. M.
    Keil, M.
    Kluberg, L.
    Li, Z.
    Lourenco, C.
    Lozano, J.
    Manso, F.
    Martins, P.
    Masoni, A.
    Neves, A.
    Ohnishi, H.
    Oppedisano, C.
    Parracho, P.
    Pillot, P.
    Poghosyan, T.
    Puddu, G.
    Radermacher, E.
    Ramalhete, P.
    Rosinsky, P.
    Scomparin, E.
    Seixas, J.
    Serci, S.
    Shahoyan, R.
    Sonderegger, P.
    Specht, H. J.
    Tieulent, R.
    Usai, G.
    [J]. EUROPEAN PHYSICAL JOURNAL C, 2009, 61 (04): : 711 - 720
  • [10] NONLINEAR REALIZATION AND HIDDEN LOCAL SYMMETRIES
    BANDO, M
    KUGO, T
    YAMAWAKI, K
    [J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1988, 164 (4-5): : 217 - 314