English

Constraints on $Z^\prime$ Boson within Minimal Flavor Violation

High Energy Physics - Phenomenology 2016-05-25 v2

Abstract

We explore a ZZ^\prime boson coupled only with the Standard Model (SM) fermions (ZffˉZ^\prime f\bar{f}) in the framework of Minimal Flavor Violation. We study its effects on the processes with lepton flavor violation jikˉl\ell_j\to \ell_i\ell_k\bar{\ell}_l, jiγ\ell_j\to\ell_i\gamma, μNeN\mu^{-}N\to e^- N, quark flavor changing neutral currents bs+b\to s \ell^+\ell^-, neutral BB and KK meson mixing, and e+effˉe^+e^-\to f\bar{f} at the LEP experiment to constrain the parameter space of ZZ^\prime mass and couplings. We find that among those relevant processes, μeγ\mu\to e\gamma, μ3e\mu\to 3e, μ\mu-ee conversion and e+effˉe^+e^-\to f\bar{f} can put more stringent bounds on ZffˉZ^\prime f\bar{f} couplings normalized by ZZ^\prime mass. Its implications on various processes are obtained, such as BB and KK mixing and B/KM1ˉ2B/K\to M \ell_1 \bar\ell_2 decays. In addition, we also make analysis on ZZ^\prime signatures at the LHC with s=8\sqrt{s}=8 and 13 TeV.

Keywords

Cite

@article{arxiv.1602.08107,
  title  = {Constraints on $Z^\prime$ Boson within Minimal Flavor Violation},
  author = {C. S. Kim and Xing-Bo Yuan and Ya-Juan Zheng},
  journal= {arXiv preprint arXiv:1602.08107},
  year   = {2016}
}

Comments

30 pages, 2 tables, 5 figures. v2: references and minor corrections for Fig.4 included