Research output: Contribution to journal › Article
The axion shield. / Andrianov, A.; Espriu, D.; Mescia, F.; Renau, A.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 684, No. 2-3, 2010, p. 101-105.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The axion shield
AU - Andrianov, A.
AU - Espriu, D.
AU - Mescia, F.
AU - Renau, A.
PY - 2010
Y1 - 2010
N2 - We investigate the propagation of a charged particle in a spatially constant, but time dependent, pseudoscalar background. Physically this pseudoscalar background could be provided by a relic axion density. The background leads to an explicit breaking of Lorentz invariance; as a consequence the process p → pγ is possible and the background acts as a shield against extremely energetic cosmic rays, an effect somewhat similar to the GZK cut-off effect. The effect is model independent and can be computed exactly. The hypothetical detection of the photons radiated via this mechanism would provide an indirect way of verifying the cosmological relevance of axions.
AB - We investigate the propagation of a charged particle in a spatially constant, but time dependent, pseudoscalar background. Physically this pseudoscalar background could be provided by a relic axion density. The background leads to an explicit breaking of Lorentz invariance; as a consequence the process p → pγ is possible and the background acts as a shield against extremely energetic cosmic rays, an effect somewhat similar to the GZK cut-off effect. The effect is model independent and can be computed exactly. The hypothetical detection of the photons radiated via this mechanism would provide an indirect way of verifying the cosmological relevance of axions.
U2 - 10.1016/j.physletb.2010.01.005
DO - 10.1016/j.physletb.2010.01.005
M3 - статья
VL - 684
SP - 101
EP - 105
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 2-3
ER -
ID: 5048004