English

The LFU Ratio $R_\pi$ in the Standard Model and Beyond

High Energy Physics - Phenomenology 2021-10-13 v1 High Energy Physics - Experiment

Abstract

We discuss the possibility of performing precise tests of μ/e\mu/e universality in Bπ+B \to\pi \ell^+\ell^- decays. We show that in wide regions of the dilepton invariant mass spectrum the ratio between muonic and electronic decay widths can be predicted with high accuracy, both within and beyond the Standard Model. We present numerical expressions which can be used to extract precise information on short-distance dynamics if a deviation from universality is observed in the data.

Keywords

Cite

@article{arxiv.2101.11626,
  title  = {The LFU Ratio $R_\pi$ in the Standard Model and Beyond},
  author = {Marzia Bordone and Claudia Cornella and Gino Isidori and Matthias König},
  journal= {arXiv preprint arXiv:2101.11626},
  year   = {2021}
}

Comments

9 pages, 3 figures