Constraining photon axion oscillations using quasar spectra
نویسندگان
چکیده
منابع مشابه
Constraining resonant photon-axion conversions in the Early Universe
The presence of a primordial magnetic field would have induced resonant conversions between photons and axion-like particles (ALPs) during the thermal history of the Universe. These conversions would have distorted the blackbody spectrum of the cosmic microwave background (CMB). In this context, we derive bounds on the photon-ALP resonant conversions using the high precision CMB spectral data c...
متن کاملString compactification, QCD axion and axion-photon-photon coupling
It is pointed out that there exist a few problems to be overcome toward an observable sub-meV QCD axion in superstring compactification. We give a general expression for the axion decay constant. For a large domain wall number NDW , the axion decay constant can be substantially lowered from a generic value of a scalar singlet VEV. The Yukawa coupling structure in the recent Z12−I model is studi...
متن کاملAxion-photon couplings in invisible axion models.
We reexamine the axion-photon couplings in various invisible axion models motivated by the recent proposal of using optical interferometry at the ASST facility in the SSCL to search for axion. We illustrate that the assignment of U(1)PQ charges for the fermion fields plays an important role in determining the couplings. Several simple non-minimal invisible axion models with suppressed and enhan...
متن کاملResonantly Enhanced Axion-Photon Regeneration
Photon-regeneration experiments which search for the axion, or axionlike particles, may be resonantly enhanced by employing matched Fabry-Perot optical cavities encompassing both the axion production and conversion magnetic field regions. Compared to a simple photon-regeneration experiment, which uses the laser in a single-pass geometry, this technique can result in a gain in rate of order F 2,...
متن کاملEffects of the Intergalactic Plasma on Supernova Dimming via Photon-Axion Oscillations
We have recently proposed a mechanism of photon-axion oscillations as a way of rendering supernovae dimmer without cosmic acceleration. Subsequently, it has been argued that the intergalactic plasma may interfere adversely with this mechanism by rendering the oscillations energy dependent. Here we show that this energy dependence is extremely sensitive to the precise value of the free electron ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2003
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2003/04/003