TY  - JOUR
AU  - Du, M. L.
AU  - Penalva, N.
AU  - Hernandez, E.
AU  - Nieves, J.
PY  - 2022
DA  - 2022//
TI  - New physics effects on Lambda(b) -> Lambda(c)*tau(nu)over-bar(tau) decays
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 055039
EP  - 21pp
VL  - 106
IS  - 5
PB  - Amer Physical Soc
AB  - We benefit from a recent lattice determination of the full set of vector, axial and tensor form factors for the Lambda(b) -> Lambda(c)* (2595)tau(nu) over bar (tau) and Lambda(c) (2625)tau(nu) over bar (tau) semileptonic decays to study the possible role of these two reactions in lepton flavor universality violation studies. Using an effective theory approach, we analyze different observables that can be accessed through the visible kinematics of the charged particles produced in the tau decay, for which we consider the pi(-)nu(tau), rho(-) nu(tau) and mu(-)(nu) over bar (mu)nu(tau) channels. We compare the results obtained in the Standard Model and other schemes containing new physics (NP) interactions, with either left-handed or right-handed neutrino operators. We find a discriminating power between models similar to the one of the Lambda(b) -> Lambda(c) decay, although somewhat hindered in this case by the larger errors of the Lambda(b) -> Lambda(c)* lattice form factors. Notwithstanding this, the analysis of these reactions is already able to discriminate between some of the NP scenarios and its potentiality will certainly improve when more precise form factors are available.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2207.10529
UR  - https://doi.org/10.1103/PhysRevD.106.055039
DO  - 10.1103/PhysRevD.106.055039
LA  - English
N1  - WOS:000870152800009
ID  - Du_etal2022
ER  -