Constraints on Light Dark Matter and U bosons, from psi, Upsilon, K+, pi0, eta and eta' decays
| dc.creator | Fayet, Pierre | |
| dc.date | 2006-07-28 | |
| dc.date.accessioned | 2026-07-07T11:05:21Z | |
| dc.date.available | 2026-07-07T11:05:21Z | |
| dc.description | Following searches for photinos and very light gravitinos in invisible decays of psi and Upsilon, we discuss new limits on Light Dark Matter and U bosons, from psi and Upsilon decays, as well as rare decays of K+ and invisible decays of pi0, eta and eta' ... . The new limits involving the vector couplings of the U to quarks turn out, not surprisingly, to be much less restrictive than existing ones on axial couplings, from an axionlike behavior of a light U boson, tested in psi --> gamma U, Upsilon --> gamma U and K+ --> pi+ U decays (or as compared to the limit from parity-violation in atomic physics, in the presence of an axial coupling to the electron). Altogether the hypothesis of light U bosons, and light dark matter particles, remains compatible with particle physics constraints, while allowing for the appropriate annihilation cross sections required, both at freeze-out (for the relic abundance) and nowadays (if e+ from LDM annihilations are at the origin of the 511 keV line from the galactic bulge). | |
| dc.description | 8 pages | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0607318 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0607318 | |
| dc.identifier | Phys.Rev.D74:054034,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.74.054034 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/189177 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Constraints on Light Dark Matter and U bosons, from psi, Upsilon, K+, pi0, eta and eta' decays | |
| dc.type | text |