Holographic photon production with magnetic field in anisotropic plasmas

Shang Yu Wu, Di-Lun Yang

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We investigate the thermal photon production from constant magnetic field in a strongly coupled and anisotropic plasma via the gauge/gravity duality. The dual geometry with pressure anisotropy is generated from the axion-dilaton gravity action introduced by Mateos and Trancancelli and the magnetic field is coupled to fundamental matters(quarks) through the D3/D7 embeddings. We find that the photon spectra with different quark mass are enhanced at large frequency when the photons are emitted parallel to the anisotropic direction with larger pressure or perpendicular to the magnetic field. However, in the opposite conditions for the emitted directions, the spectra approximately saturate isotropic results in the absence of magnetic field. On the other hand, a resonance emerges at moderate frequency for the photon spectrum with heavy quarks when the photons move perpendicular to the magnetic field. The resonance is more robust when the photons are polarized along the magnetic field. On the contrary, in the presence of pressure anisotropy, the resonance will be suppressed. There exist competing effects of magnetic field and pressure anisotropy on meson melting in the strongly coupled super Yang-Mills plasma, while we argue that the suppression led by anisotropy may not be applied to the quark gluon plasma.

Original languageEnglish
Article number032
JournalJournal of High Energy Physics
Volume2013
Issue number8
DOIs
Publication statusPublished - 2013 Sep 30
Externally publishedYes

Fingerprint

photons
magnetic fields
quarks
anisotropy
gravitation
embedding
mesons
melting
retarding
geometry

Keywords

  • Holography and quark-gluon plasmas
  • Quark-Gluon Plasma

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Holographic photon production with magnetic field in anisotropic plasmas. / Wu, Shang Yu; Yang, Di-Lun.

In: Journal of High Energy Physics, Vol. 2013, No. 8, 032, 30.09.2013.

Research output: Contribution to journalArticle

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