Axions and axion-like particles
نویسندگان
چکیده
منابع مشابه
Evading Astrophysical Constraints on Axion-Like Particles
Stellar energy loss arguments lead to strong constraints on the coupling φγγ of a light axion-like particle to two photons. Helioscopes, like CAST, are able to put competitive bounds. The PVLAS experiment has recently observed a rotation of the polarization of a laser propagating in a magnetic field that can be interpreted as the effect of a quite strong φγγ coupling. We present scenarios where...
متن کاملAxion Searches with Helioscopes and astrophysical signatures for axion(-like) particles
Axions should be produced copiously in Stars such as the Sun. The first part of the article reviews the capabilities and performance of axion helioscopes. The mechanism they rely on is described and the achieved experimental results for the interaction of solar axions and axion-like particles with matter are given. The second part is observationally driven. New results obtained with Monte Carlo...
متن کاملPolarization mesurements of gamma ray bursts and axion like particles
A polarized gamma ray emission spread over a sufficiently wide energy band from a strongly magnetized astrophysical object like gamma ray bursts (GRBs) offers an opportunity to test the hypothesis of axion like particles (ALPs). Based on evidences of polarized gamma ray emission detected in several gamma ray bursts we estimated the level of ALPs induced dichroism, which could take place in the ...
متن کاملAxion-Like Particles, Cosmic Magnetic Fields and Gamma-Ray Astrophysics
Axion-Like Particles (ALPs) are predicted by many extensions of the Standard Model and give rise to characteristic dimming and polarization effects in a light beam travelling in a magnetic field. In this Letter, we demonstrate that photonALP mixing in cosmic magnetic fields produces an observable distortion in the energy spectra of distant gamma-ray sources (like AGN) for ranges of the ALP para...
متن کاملThe Gammev Suite of Experimental Searches for Axion-like Particles
We report on the design and results of the GammeV search for axion-like particles and for chameleon particles. We also discuss plans for an improved experiment to search for chameleon particles, one which is sensitive to both cosmological and power-law chameleon models. Plans for an improved axion-like particle search using coupled resonant cavities are also presented. This experiment will be m...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2003
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(02)01893-5