6533b836fe1ef96bd12a0ab9
RESEARCH PRODUCT
A new way to search for right-handed currents in semileptonic B→ρℓν‾ decay
Florian Urs BernlochnerFlorian Urs BernlochnerZoltan LigetiSascha Turczyksubject
PhysicsQuarkNuclear and High Energy PhysicsParticle physicsCurrent (mathematics)Meson010308 nuclear & particles physicsCabibbo–Kobayashi–Maskawa matrix01 natural sciencesStandard ModelRange (mathematics)Variable (computer science)0103 physical sciencesHigh Energy Physics::ExperimentSensitivity (control systems)010306 general physicsdescription
AbstractThere exist a long standing tension among determinations of the CKM matrix element |Vub| from various (semi)leptonic B decay channels with varying significance of up to ∼3σ. An interesting possibility to ease this tension is to allow for a right-handed contribution to the standard model left-handed weak current mediating the b→u quark decay. Current bounds on such a contribution are fairly weak. We propose a new way to search for such a right-handed current in semileptonic B→ρ meson decays. We describe a new variable that we propose, and discuss the theoretical uncertainties. Especially we investigate the uncertainties and their correlations among all contributing form factors with the assumed z-expansion for its shape, valid over the whole q2 range. Then we study the achievable sensitivity both from the available Babar and Belle data sets, as well as from an anticipated 50 ab−1 at Belle II.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-04-01 | Nuclear and Particle Physics Proceedings |