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Title: Solar constraints on hidden photons re-visited

We re-examine solar emission of hidden photons γ' (mass m) caused by kinetic γ–γ' mixing. We calculate the emission rate with thermal field theory methods and with a kinetic equation that includes γ–γ' ''flavor oscillations'' and γ absorption and emission by the thermal medium. In the resonant case both methods yield identical emission rates which, in the longitudinal channel, are enhanced by a factor ω{sub P}{sup 2}/m{sup 2} (plasma frequency ω{sub P}) in agreement with An, Pospelov and Pradler (2013). The Sun must not emit more energy in a ''dark channel'' than allowed by solar neutrino measurements, i.e., not more than 10% of its photon luminosity. Together with the revised emission rate, this conservative requirement implies χ < 4 × 10{sup −12}(eV/m) for the kinetic mixing parameter. This is the most restrictive stellar limit below m ∼ 3eV, whereas for larger masses the transverse channel dominates together with limits from other stars. A recent analysis of XENON10 data marginally improves the solar limit, leaving open the opportunity to detect solar hidden photons with future large-scale dark matter experiments. Detecting low-mass hidden photons with the ALPS-II photon-regeneration experiment also remains possible.
Authors:
;  [1]
  1. Arnold Sommerfeld Center, Ludwig-Maximilians-Universität, Theresienstr. 37, 80333 München (Germany)
Publication Date:
OSTI Identifier:
22282726
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION; EMISSION; EV RANGE; FIELD THEORIES; FLAVOR MODEL; KINETIC EQUATIONS; LANGMUIR FREQUENCY; LIMITING VALUES; LUMINOSITY; MASS; NONLUMINOUS MATTER; OSCILLATIONS; PHOTONS; SOLAR NEUTRINOS; SUN