A light Higgs at the LHC and the B-anomalies

Liu, Da; Liu, Jia; Wagner, Carlos E.  M.; Wang, Xiao-Ping

doi:10.1007/JHEP06(2018)150

Title: A light Higgs at the LHC and the B-anomalies

Journal Article · Wed Jun 27 00:00:00 EDT 2018 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP06(2018)150· OSTI ID:1593989

Liu, Da ^[1]; Liu, Jia ^[2]; Wagner, Carlos E. M. ^[3]; Wang, Xiao-Ping ^[1]

Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Chicago, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)

After the Higgs discovery, the LHC has been looking for new resonances, decaying into pairs of Standard Model (SM) particles. Recently, the CMS experimen observed an excess in the di-photon channel, with a di-photon invariant mass of about 96 GeV. This mass range is similar to the one of an excess observed in the search for the associated production of Higgs bosons with the Z neutral gauge boson at LEP, with the Higgs bosons decaying to bottom quark pairs. On the other hand, the LHCb experiment observed a discrepancy with respect to the SM expectations of the ratio of the decay of B-mesons to K-mesons and a pair of leptons, $ {R}_{K^{\left(\ast \right)}}=BR\left(B\to {K}^{\left(\ast \right)}{\mu}^{+}{\mu}^{-}\right)/BR\left(B\to {K}^{\left(\ast \right)}{e}^{+}{e}^{-}\right) $. This observation provides a hint of the violation of lepton-flavor universality in the charged lepton sector and may be explained by the existence of a vector boson originating form a $ U{(1)_{L_{\mu}}}_{-{L}_{{}_{\tau }}} $ symmetry and heavy quarks that mix with the left-handed down quarks. Since the coupling to heavy quarks could lead to sizable Higgs di-photon rates in the gluon fusion channel, in this article we propose a common origin of these anomalies identifying a Higgs associated with the breakdown of the $ U{(1)_{L_{\mu}}}_{-{L}_{{}_{\tau }}} $ symmetry and at the same time responsible to the quark mixing, with the one observed at the LHC. We also discuss the constraints on the identification of the same Higgs with the one associated with the bottom quark pair excess observed at LEP.

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Research Organization:: Univ. of Chicago, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

Grant/Contract Number:: SC0009924; FG02-13ER41958; AC02-06CH11357; PHY-1607611

OSTI ID:: 1593989

Journal Information:: Journal of High Energy Physics (Online), Vol. 2018, Issue 6; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 25 works

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