A New Light Particle in B Decays?
| Autor: | Filippo Sala, David M. Straub |
|---|---|
| Přispěvatelé: | Laboratoire de Physique Théorique et Hautes Energies (LPTHE), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Nuclear and High Energy Physics
Particle physics B: semileptonic decay Dark matter Flavour resonance: vector FOS: Physical sciences 01 natural sciences dark matter Nuclear physics High Energy Physics - Phenomenology (hep-ph) lepton: flavor: universality 0103 physical sciences Decay product B: branching ratio 010306 general physics numerical calculations Physics Muon Missing energy Anomalous magnetic dipole moment muon: magnetic moment 010308 nuclear & particles physics new physics branching ratio: ratio LHC-B lcsh:QC1-999 Universality (dynamical systems) missing-energy High Energy Physics - Phenomenology invisible decay [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] High Energy Physics::Experiment lcsh:Physics Lepton |
| Zdroj: | Physics Letters B Physics Letters B, Elsevier, 2017, 774, pp.205-209. ⟨10.1016/j.physletb.2017.09.072⟩ Physics Letters B, Vol 774, Iss C, Pp 205-209 (2017) Phys.Lett.B Phys.Lett.B, 2017, 774, pp.205-209. ⟨10.1016/j.physletb.2017.09.072⟩ |
| ISSN: | 0370-2693 |
| DOI: | 10.1016/j.physletb.2017.09.072⟩ |
| Popis: | We investigate the possibility whether the tensions with SM expectations observed in several b -> sll transitions, including hints for lepton flavour non-universality, could be due to the decay of B into a new light resonance. We find that qualitative agreement with the data can be obtained with a light vector resonance dominantly decaying invisibly. This scenario predicts a shift in the muon anomalous magnetic moment that could explain the long-standing discrepancy. The most stringent constraint comes from searches for B decays with missing energy. A striking prediction is a strong q^2 dependence of the lepton flavour universality ratios R_K and R_K* that should allow to clearly confirm or rule out this possibility experimentally. We also comment on the possible connection of the invisible decay product with Dark Matter. 5 pages, 2 figures. v2: typos corrected, references and clarifications added |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect