Impact of spin-zero particle-photon interactions on light polarization in external magnetic fields
| dc.creator | Liao, Yi | |
| dc.date | 2007-04-16 | |
| dc.date | 2007-05-17 | |
| dc.date.accessioned | 2026-07-07T10:59:35Z | |
| dc.date.available | 2026-07-07T10:59:35Z | |
| dc.description | If the recent PVLAS results on polarization changes of a linearly polarized laser beam passing through a magnetic field are interpreted by an axion-like particle, it is almost certain that it is not a standard QCD axion. Considering this, we study the general effective interactions of photons with spin-zero particles without restricting the latter to be a pseudo-scalar or a scalar, i.e., a parity eigenstate. At the lowest order in effective field theory, there are two dimension-5 interactions, each of which has previously been treated separately for a pseudo-scalar or a scalar particle. By following the evolution in an external magnetic field of the system of spin-zero particles and photons, we compute the changes in light polarization and the transition probability for two experimental set-ups: one-way propagation and round-trip propagation. While the first may be relevant for astrophysical sources of spin-zero particles, the second applies to laboratory optical experiments like PVLAS. In the one-way propagation, interesting phenomena can occur for special configurations of polarization where, for instance, transition occurs but light polarization does not change. For the round-trip propagation, however, the standard results of polarization changes for a pseudoscalar or a scalar are only modified by a factor that depends on the relative strength of the two interactions. | |
| dc.description | To appear in PLB, 10 pp, 0 figs; thanks to the anonymous referee for useful comments/suggestions. Main changes: (1)English hopefully improved. (2)The word `interference' deleted. (3)Results unchanged but discussions extended. (4)Quote Ref [26] where spin-zero particles with mixed parity appear. (5)Acknowledgements added | |
| dc.identifier | https://arxiv.org/abs/0704.1961 | |
| dc.identifier | http://arxiv.org/abs/0704.1961 | |
| dc.identifier | Phys.Lett.B650:257-261,2007 | |
| dc.identifier | doi:10.1016/j.physletb.2007.05.020 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/187451 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Impact of spin-zero particle-photon interactions on light polarization in external magnetic fields | |
| dc.type | text |