Titel
Constraints on the Anomalous Wtb Couplings from B-Physics Experiments
Autor*in
Anastasiia Kozachuk
D. V. Skobeltsyn Institute of Nuclear Physics, M. V. Lomonosov Moscow State University,
Abstract
We analyze constraints on the anomalous Wtb couplings from B-physics experiments, performing a correlated analysis and allowing all anomalous couplings to differ simultaneously from their Standard Model (SM) values. The B-physics observables allow one to probe three linear combinations out of the four anomalous couplings, which parameterize the Wtb vertex under the assumption that the SM symmetries remain the symmetries of the effective theory. The constraints in this work are obtained by taking into account the following B-physics observables: the B¯¯¯0−B0 oscillations, the leptonic B→μ+μ− decays, the inclusive radiative B→Xsγ decays, and the differential branching fractions in the semileptonic inclusive B→Xsμ+μ− and exclusive B→(K,K∗)μ+μ− decays at small q2, with q the momentum of the μ+μ− pair. We find that the SM values of the anomalous couplings belong to the 95% CL allowed region obtained this way, but lie beyond the 68% allowed region. We also report that the distributions of the anomalous couplings obtained within our scenario differ from the results of the 1D scenario, when only one of the couplings is allowed to deviate from its SM value.
Stichwort
standard modelnew physicstop quark
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:1244356
Erschienen in
Titel
Symmetry
Band
12
Ausgabe
9
ISSN
2073-8994
Erscheinungsdatum
2020
Publication
MDPI AG
Erscheinungsdatum
2020
Zugänglichkeit
Rechte
Rechteangabe
© 2020 by the authors
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