A new bound on 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 کاملA Cosmological Bound on the Invisible Axion
where v is the magnitude of the vacuum expectation value which breaks the U(1)pQ symmetry. An axion of mass (1) with v of order the weak interaction scale has not been observed. However, it has been pointed out [3] that v may be much larger, for example of order the grand unification mass. The axion is then extremely light and weakly coupled and is essentially invisible to laboratory experiment...
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...
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 کاملSearching for Axion-like Particles with Active Galac- tic Nuclei
An Axion-Like Particle (ALP) is any scalar or pseudo-scalar field which couples to the kinetic terms of the photon. The pseudo scalar coupling to photons is identical to that of the axion; L ⊃ φ 4M ǫμνλρFF, and a scalar field couples through the Lagrangian term; L ⊃ φ 4MFμνF μν . The presence of contact interactions between ALPs and photons means that ALPs affect the propagation of photons thro...
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: 2017
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2017/12/036