Lepton flavour universality violation from composite muons

Peter Stangl

Lepton flavour universality violation from composite muons

High Energy Physics - Phenomenology 2015-10-16 v1

Authors: Peter Stangl

Abstract

We describe a possibility to explain the $2.6\sigma$ deviation from lepton flavour universality observed by the LHCb collaboration in $B^+\to K^+\ell^+\ell^-$ decays in the context of minimal composite Higgs models. We find that a sizable degree of compositeness of partially composite muons can lead to a good agreement with the experimental data. Our construction predicts a new physics contribution to $B_s$ - $\bar{B}_s$ mixing. Additionally, it accounts for the deficit in the invisible $Z$ width measured at LEP.

Keywords

lepton flavor universality lepton flavor violation flavor physics beyond the standard model

Cite

@article{arxiv.1510.04596,
  title  = {Lepton flavour universality violation from composite muons},
  author = {Peter Stangl},
  journal= {arXiv preprint arXiv:1510.04596},
  year   = {2015}
}

Comments

8 pages, 3 figures. To be published in the proceedings of the European Physical Society Conference on High Energy Physics (EPS-HEP), 22-29 July 2015, Vienna, Austria

Lepton flavour universality violation from composite muons

Abstract

Keywords

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