English

Tree-level new physics in $R(K^{(*)})$

High Energy Physics - Phenomenology 2023-03-17 v2

Abstract

We implement the χ2\chi^2 fit for R(K())R(K^{(*)}) with possible tree-level new physics in a model-independent parametrization. Relevant Wilson coefficients are decomposed into the new physics scale, its power, and the fermionic couplings. Constraints from the branching ratio of Bsμ+μB_s\to\mu^+\mu^- can be naturally incorporated with the scheme. For a reasonable set of the parameter ranges it is found that the new physics is less than 5 TeV\sim 5~{\rm TeV}. Some new physics models including the leptoquark, ZZ', etc. can be embraced within our framework. We give comments on new LHCb data which are close to the standard model predictions.

Keywords

Cite

@article{arxiv.2208.09675,
  title  = {Tree-level new physics in $R(K^{(*)})$},
  author = {Jong-Phil Lee},
  journal= {arXiv preprint arXiv:2208.09675},
  year   = {2023}
}

Comments

13 pages, 3 figures; more discussions

R2 v1 2026-06-25T01:50:20.639Z