6533b823fe1ef96bd127e0d5
RESEARCH PRODUCT
New physics in $B$ meson mixing: future sensitivity and limitations
Luiz Vale SilvaSébastien Descotes-genonMichele PapucciKarim TrabelsiZoltan LigetiJérôme CharlesS. Monteilsubject
BELLE: upgradeLHC-B: upgradeParticle physicsMesonPhysics beyond the Standard ModelFOS: Physical sciences01 natural sciencesAtomicStandard ModelHigh Energy Physics - ExperimentPhenomenological aspects of field theoryHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)Particle and Plasma Physicseffective field theory0103 physical sciencesEffective field theory[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]B mesonNuclearmeson: mixing010306 general physicsMixing (physics)PhysicsQuantum Physics010308 nuclear & particles physicsCabibbo–Kobayashi–Maskawa matrixhep-exMolecularhep-phFCC-eesensitivityNuclear & Particles Physicsgeneral methodsHigh Energy Physics - PhenomenologyUpgradeCKM matrix[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]High Energy Physics::Experimentluminosity: highAstronomical and Space Sciencesdescription
The mixing of neutral mesons is sensitive to some of the highest scales probed in laboratory experiments. In light of the planned LHCb Upgrade II, a possible upgrade of Belle II, and the broad interest in flavor physics in the tera-Z phase of the proposed FCC-ee program, we study constraints on new physics contributions to Bd and Bs mixings which can be obtained in these benchmark scenarios. We explore the limitations of this program, and identify the measurement of |Vcb| as one of the key ingredients in which progress beyond current expectations is necessary to maximize future sensitivity. We speculate on possible solutions to this bottleneck. Given the current tension with the standard model (SM) in semileptonic B decays, we explore how its resolution may impact the search for new physics in mixing. Even if new physics has the same Cabibbo-Kobayashi-Maskawa and loop suppressions of flavor changing processes as the SM, the sensitivity will reach 2 TeV, and it can be much higher if any SM suppressions are lifted. We illustrate the discovery potential of this program.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-09-28 |