https://doi.org/10.1140/epjc/s10052-017-4794-9
Regular Article - Theoretical Physics
The 
decay in the aligned two-Higgs-doublet model
Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics (MOE), Central China Normal University, Wuhan, 430079, Hubei, China
* e-mail: xqli@mail.ccnu.edu.cn
Received:
29
January
2017
Accepted:
27
March
2017
Published online:
11
April
2017
The rare baryonic decay 
provides valuable complementary information compared to the corresponding mesonic 
transition. In this paper, using the latest high-precision lattice QCD calculation of the 
transition form factors, we study this interesting decay within the aligned two-Higgs-doublet model, paying particularly attention to the effects of the chirality-flipped operators generated by the charged scalars. In order to extract the full set of angular coefficients in this decay, we consider the following ten angular observables, which can be derived from the analysis of the subsequent parity-violating 
decay: the differential branching fraction 
, the longitudinal polarization fraction 
, the lepton-, hadron- and combined lepton–hadron-side forward–backward asymmetries 
, 
and 
, as well as the other five asymmetry observables 
(
). Detailed numerical comparisons are made between the SM and NP values for these angular observables. It is found that, under the constraints from the inclusive 
branching fraction and the latest global fit results of 
data, the contributions of right-handed semileptonic operators 
, besides reconciling the 
anomaly observed in 
decay, could also enhance the values of and in the bin 
, leading to results consistent with the current LHCb measurements.
© The Author(s), 2017
