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

Abstract

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 ofmore » 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.« less

Authors:
 [1];  [2];  [3];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Univ. of Chicago, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
Publication Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF)
OSTI Identifier:
1593989
Grant/Contract Number:  
SC0009924; FG02-13ER41958; AC02-06CH11357; PHY-1607611
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2018; Journal Issue: 6; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Higgs Physics; Gauge Symmetry

Citation Formats

Liu, Da, Liu, Jia, Wagner, Carlos E. M., and Wang, Xiao-Ping. A light Higgs at the LHC and the B-anomalies. United States: N. p., 2018. Web. doi:10.1007/JHEP06(2018)150.
Liu, Da, Liu, Jia, Wagner, Carlos E. M., & Wang, Xiao-Ping. A light Higgs at the LHC and the B-anomalies. United States. doi:10.1007/JHEP06(2018)150.
Liu, Da, Liu, Jia, Wagner, Carlos E. M., and Wang, Xiao-Ping. Wed . "A light Higgs at the LHC and the B-anomalies". United States. doi:10.1007/JHEP06(2018)150. https://www.osti.gov/servlets/purl/1593989.
@article{osti_1593989,
title = {A light Higgs at the LHC and the B-anomalies},
author = {Liu, Da and Liu, Jia and Wagner, Carlos E. M. and Wang, Xiao-Ping},
abstractNote = {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.},
doi = {10.1007/JHEP06(2018)150},
journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 6,
volume = 2018,
place = {United States},
year = {2018},
month = {6}
}

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