## Abstract

We consider higher-curvature corrections to the R-current correlator by studying the propagation of a U(1) field in Einstein-Gauss-Bonnet gravity with a negative cosmological constant. We numerically solve the Maxwell equations and plot an R-current spectral function with lightlike momenta, which contains pivotal information of thermal photon emission. We also analytically compute the R-current correlator in the long-distance limit by using the holographic membrane paradigm. In the high-energy regime, the inelastic scattering between R-current and gauge theory plasma is expected to happen, which will reveal the structure of the plasma at strong coupling. It turns out that the Gauss-Bonnet correction effectively rescales all physical quantities considered here by some functions of the Gauss-Bonnet coefficient. In particular, the Gauss-Bonnet terms will enhance or weaken signatures calculated here in accordance with the sign of the Gauss-Bonnet coefficient.

Original language | English |
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Article number | 086008 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 89 |

Issue number | 8 |

DOIs | |

State | Published - 11 Apr 2014 |

## ASJC Scopus subject areas

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)