English

Accumulating Hints for Flavour Violating Higgses at the Electroweak Scale

High Energy Physics - Phenomenology 2024-07-16 v3 High Energy Physics - Experiment

Abstract

We show that supplementing the Standard Model by only a second Higgs doublet, a combined explanation of heτh\to e\tau, hμτh\to \mu\tau, bs+b\to s \ell^+ \ell^-, the WW mass and R(D())R({D^{(*)}}) as well as the excess in tbH+(130GeV)bbct\to bH^+(130\,{\rm GeV})\to b\overline{b}c is possible. While this requires flavour violating couplings, the stringent bounds from e.g. μeγ\mu\to e\gamma, τμγ\tau\to \mu\gamma, BsBˉsB_s-\bar B_s mixing, bsγb\to s\gamma, low mass di-jet and ppH+Hτ+τννˉpp\to H^+H^-\to \tau^+\tau^-\nu\bar\nu searches can be avoided. However, the model is very constrained, it inevitably predicts a shift in the SM Higgs coupling strength to tau leptons as well as a non-zero thct\to hc rate, as indeed preferred by recent measurements. We study three benchmark points providing such a simultaneous explanation and calculate their predictions, including collider signatures which can be tested with upcoming LHC run-3 data.

Keywords

Cite

@article{arxiv.2311.03430,
  title  = {Accumulating Hints for Flavour Violating Higgses at the Electroweak Scale},
  author = {Andreas Crivellin and Syuhei Iguro},
  journal= {arXiv preprint arXiv:2311.03430},
  year   = {2024}
}

Comments

10 pages, 3 figures, 1 table, typo corrected in Bs meson mixing

R2 v1 2026-06-28T13:13:08.786Z