@Article{Murgui_etal2019,
author="Murgui, C.
and Pe{\~{n}}uelas, A.
and Jung, M.
and Pich, A.",
title="Global fit to b -> c tau nu transitions",
journal="Journal of High Energy Physics",
year="2019",
publisher="Springer",
volume="09",
number="9",
pages="103--45pp",
optkeywords="Beyond Standard Model; Effective Field Theories",
abstract="We perform a general model-independent analysis of b -> c tau(nu) over bar (tau) transitions, including measurements of R-D, R-D*, their q(2) differential distributions, the recently measured longitudinal D* polarization F-L(D)*, and constraints from the B-c -> tau(nu) over bar (tau) lifetime, each of which has significant impact on the fit. A global fit to a general set of Wilson coefficients of an effective low-energy Hamiltonian is presented, the solutions of which are interpreted in terms of hypothetical new-physics mediators. From the obtained results we predict selected b -> c tau(nu) over bar (tau) observables, such as the baryonic transition Lambda(b) -> Lambda(c)tau(nu) over bar (tau), the ratio R-J/psi, the forward-backward asymmetries A(FB)(D()*()), the tau polarization asymmetries P-tau(D()*()), and the longitudinal D* polarization fraction F-L(D)*. The latter shows presently a slight tension with any new-physics model, such that an improved measurement could have an important impact. We also discuss the potential change due the very recently announced preliminary R-D(*) measurement by the Belle collaboration.",
optnote="WOS:000490861200001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4177), last updated on Tue, 29 Oct 2019 08:32:01 +0000",
issn="1029-8479",
doi="10.1007/JHEP09(2019)103",
opturl="https://arxiv.org/abs/1904.09311",
opturl="https://doi.org/10.1007/JHEP09(2019)103",
language="English"
}