English

Charged Current Anomalies with Baryons

High Energy Physics - Phenomenology 2022-10-24 v1

Abstract

Motivated by the first observation of ΛbΛc τνˉ\Lambda_b\to\Lambda_c~\tau\bar{\nu} by LHCb, we discuss various observables that can be derived from angular distribution of this decay which, if measured, could be essential for explanation of the bcτνˉb\to c\tau\bar{\nu} anomalies. Furthermore, we show that the measurement of RΛc=B(ΛbΛcτνˉ)/B(ΛbΛcμνˉ)R_{\Lambda_c}=\mathcal{B}(\Lambda_b\to\Lambda_c\tau\bar{\nu})/\mathcal{B}(\Lambda_b\to\Lambda_c\mu\bar{\nu}) does not change the current global picture arising from RDR_D^{\rm} and RDR_{D^*}^{\rm} being larger than predicted in the Standard Model. Finally, we show the example of a few angular observables, with and without a secondary decay, that could have a strong discriminating power on New Physics.

Keywords

Cite

@article{arxiv.2210.12071,
  title  = {Charged Current Anomalies with Baryons},
  author = {Damir Becirevic and Florentin Jaffredo},
  journal= {arXiv preprint arXiv:2210.12071},
  year   = {2022}
}

Comments

6 pages, 4 figures, contribution to the 2022 EW session of the 56th Rencontres de Moriond. Based on arXiv:2209.13409

R2 v1 2026-06-28T04:11:47.231Z