Semileptonic $B_{(s)}$ decays to excited charmed mesons with $e,\mu,\tau$ and searching for new physics with $R(D^{**})$ - INSPIRE

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Semileptonic $B_{(s)}$ decays to excited charmed mesons with $e,\mu,\tau$ and searching for new physics with $R(D^{**})$

Florian U. Bernlochner
(
- Bonn U.
)
,
Zoltan Ligeti
(
- LBNL, Berkeley
)

Jun 29, 2016

18 pages

Published in:

Phys.Rev.D 95 (2017) 1, 014022

Published: Jan 23, 2017

e-Print:

1606.09300 [hep-ph]

DOI:

10.1103/PhysRevD.95.014022

View in:

ADS Abstract Service

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Abstract: (APS)

Semileptonic B meson decays into the four lightest excited charmed meson states (D0*, D1*, D1, and D2*) and their counterparts with s quarks are investigated, including the full lepton mass dependence. We derive the standard model predictions for the differential branching fractions, as well as predictions for the ratios of the semitauonic and light-lepton semileptonic branching fractions. These can be systematically improved using future measurements of the total or differential semileptonic rates to e and μ, as well as the two-body hadronic branching fractions with a pion, related by factorization to the semileptonic rate at maximal recoil. To illustrate the different sensitivities to new physics, we explore the dependence of the ratio of semitauonic and light-lepton branching fractions to possible four-fermion scalar interactions.

Note:

17 pages

B: semileptonic decay
B: branching ratio
Higgs particle: doublet: 2
Heavy Quark Effective Theory
form factor
branching ratio: ratio
charmed meson
Isgur-Wise function
CKM matrix
factorization

References(56)

Figures(16)

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