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New Signatures of Flavor Violating Higgs Couplings | Malte Buschmann
; Joachim Kopp
; Jia Liu
; Xiao-Ping Wang
; | Date: |
11 Jan 2016 | Abstract: | We explore several novel LHC signatures arising from quark or lepton flavor
violating couplings in the Higgs sector, and we constrain such couplings using
LHC data. Since the largest signals are possible in channels involving top
quarks or tau leptons, we consider in particular the following flavor violating
processes: (1) $pp o thh$ (top plus di-Higgs final state) arising from a
dimension six coupling of up-type quarks to three insertions of the Higgs
field. We develop a search strategy for this final state and demonstrate that
detection is possible at the high luminosity LHC if flavor violating
top--up--Higgs couplings are not too far below the current limit. (2) $pp o
tH^0$, where $H^0$ is the heavy neutral CP-even Higgs boson in a two Higgs
doublet model (2HDM). We consider the decay channels $H^0 o tu, WW, ZZ, hh$
and use existing LHC data to constrain the first three of them. For the fourth,
we adapt our search for the $thh$ final state, and we demonstrate that in large
regions of the parameter space, it is superior to other searches, including
searches for flavor violating top quark decays ($t o hq$). (3) $H^0 o
aumu$, again in the context of a 2HDM. This channel is particularly well
motivated by the recent CMS excess in $h o aumu$, and we use the data from
this search to constrain the properties of $H^0$. | Source: | arXiv, 1601.2616 | Services: | Forum | Review | PDF | Favorites |
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