Charged pions tagged with polarized photons probing strong 
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 violation in a chiral-imbalance medium

Kawaguchi, Mamiya; Harada, Masayasu; Matsuzaki, Shinya; Ouyang, Ruiwen

doi:10.1103/physrevc.95.065204

Cited by 13 publications

(13 citation statements)

References 21 publications

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“…• We draw also attention to the recent proposal to measure the photon polarization asymmetry in πγ scattering [14,17,18] as a way to detect LPB due to chiral imbalance. It happens in the ChPT including electromagnetic fields due to the Wess-Zumino-Witten operators.…”

Section: Resultsmentioning

confidence: 99%

Chiral Perturbation Theory vs. Linear Sigma Model in A Chiral Imbalance Medium

Andrianov¹,

Andrianov²,

Espriu³

2019

Preprint

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We compare Chiral Perturbation Theory (ChPT) and the Linear Sigma Model (LSM) as realizations of low energy QCD for light mesons in a chirally imbalanced medium. The relations between the low-energy constants of the Chiral Lagrangian and the corresponding constants of the Linear Sigma Model are established as well as the expressions for the decay constant of $\pi $-meson in the medium and for the mass of the $a_0$. In the large $N_c$ count taken from QCD the correspondence of ChPT and LSM is remarkably good and give a solid ground for search of chiral imbalance manifestation in pion physics. A possible experimental detection of chiral imbalance (and therefore a phase with Local Parity Breaking) is outlined in the charged pion decays inside the fireball.

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Section: Resultsmentioning

confidence: 99%

Chiral Perturbation Theory vs. Linear Sigma Model in A Chiral Imbalance Medium

Andrianov¹,

Andrianov²,

Espriu³

2019

Preprint

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“…After our work was finished, we found a recent paper [59], where it was discussed a possibility for charged pions to act as a probe for measuring the strong CP violation in chirally imbalance matter. Since in the charged PC phase the isotopic density is nonzero, which also implies the possibility of a nonzero density of charged pions, we guess that our results support this mechanism for detecting the CP violation in chirally asymmetric baryon matter.…”

Section: Discussionmentioning

confidence: 99%

Inhomogeneous charged pion condensation in chiral asymmetric dense quark matter in the framework of a NJL2 model

et al. 2017

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In this paper we investigate the phase structure of a (1+1)-dimensional quark model with fourquark interaction and in the presence of baryon (µB), isospin (µI ) and chiral isospin (µI5) chemical potentials. Spatially inhomogeneous chiral density wave (for chiral condensate) and single wave (for charged pion condensate) approaches are used. It is established that in the large-Nc limit (Nc is the number of colored quarks) there exists a duality correspondence between the chiral symmetry breaking phase and the charged pion condensation (PC) one. Moreover, it is shown that inhomogeneous charged PC phase with nonzero baryon density is induced in the model by arbitrary small values of the chemical potential µI5 (for a rather large region of µB and µI ).

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“…• Recently an interesting proposal was given in [21] to detect the LPB by measuring photon polarization asymmetry in the process π ± γ → π ± γ. We extend this proposal indicating the resonance enhancement at energies comparable with the mass ofã ± 0 scalars.…”

Section: Discussionmentioning

confidence: 99%

Exotic meson decays in the environment with chiral imbalance

Andrianov

Espriu

et al. 2017

EPJ Web Conf.

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Abstract. An emergence of Local Parity Breaking (LPB) in central heavy-ion collisions (HIC) at high energies is discussed. LPB in the fireball can be produced by a difference between the number densities of right-and left-handed chiral fermions (Chiral Imbalance) which is implemented by a chiral (axial) chemical potential. The effective meson lagrangian induced by QCD is extended to the medium with Chiral Imbalance and the properties of light scalar and pseudoscalar mesons (π, a 0 ) are analyzed. It is shown that exotic decays of scalar mesons arise as a result of mixing of π and a 0 vacuum states in the presence of chiral imbalance. The pion electromagnetic formfactor obtains an unusual parity-odd supplement which generates a photon polarization asymmetry in pion polarizability. We hope that the above pointed indications of LPB can be identified in experiments on LHC, RHIC, CBM FAIR and NICA accelerators. Topological charge, Chiral Imbalance and axial chemical potentialThe behaviour of baryonic matter under extreme conditions has got recently a lot of interest [1,2]. A medium generated in the heavy ion collisions may serve for detailed studies, both experimental and theoretical, of various phases of hadron matter. In this context new properties of QCD in the hot and dense environment are tested in current accelerator experiments on RHIC and LHC [3,4].In heavy ion collisions, in principle, there are two distinct experimental situations for peripheral and central collisions. In the first case the so-called Chiral Magnetic Effect (CME) can be detected, details see in [5] and also [6] for a review and additional references.In the second case there are some experimental indications of an abnormal dilepton excess in the range of low invariant masses and rapidities and moderate values of the transverse momenta [7]-[11] (see the reviews in [12]), which can be thought of as a result of LPB in the medium (the details can be found in [13]). In particular, in heavy-ion collisions at high energies, with raising temperatures and baryon densities, metastable states can appear in the finite-volume fireball with a nontrivial topological ⋆

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Charged pions tagged with polarized photons probing strong CP violation in a chiral-imbalance medium

Cited by 13 publications

References 21 publications

Chiral Perturbation Theory vs. Linear Sigma Model in A Chiral Imbalance Medium

Chiral Perturbation Theory vs. Linear Sigma Model in A Chiral Imbalance Medium

Inhomogeneous charged pion condensation in chiral asymmetric dense quark matter in the framework of a NJL2 model

Exotic meson decays in the environment with chiral imbalance

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