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Search for a light charged Higgs boson decaying to $c\bar{s}$ in $pp$ collisions at $\sqrt{s}$ = 8 TeV


LHCb Collaboration; Aaij, R; Adeva, B; Adinolfi, M; Anderson, J; Bernet, R; Bowen, E; Bursche, A; Chiapolini, N; Chrzaszcz, M; Dey, B; Elsasser, C; Graverini, E; Lionetto, F; Lowdon, P; Mauri, A; Müller, K; Serra, N; Steinkamp, O; Storaci, B; Straumann, U; Tresch, M; Vollhardt, A; Weiden, A; et al (2015). Search for a light charged Higgs boson decaying to $c\bar{s}$ in $pp$ collisions at $\sqrt{s}$ = 8 TeV. Journal of High Energy Physics, 2015(11):190.

Abstract

A search for a light charged Higgs boson, originating from the decay of a top quark and subsequently decaying into a charm quark and a strange antiquark, is presented. The data used in the analysis correspond to an integrated luminosity of 19.7 $fb^{−1}$ recorded in proton-proton collisions at $\sqrt {\bar{s}}$ = 8 TeV by the CMS experiment at the LHC. The search is performed in the process $t\bar{t} \to W ^{\pm} bH ^{\pm} \bar{b}$, where the W boson decays to a lepton (electron or muon) and a neutrino. The decays lead to a final state comprising an isolated lepton, at least four jets and large missing transverse energy. No significant deviation is observed in the data with respect to the standard model predictions, and model-independent upper limits are set on the branching fraction $B(t \to H^{+}b)$, ranging from 1.2 to 6.5% for a charged Higgs boson with mass between 90 and 160 GeV, under the assumption that $B(H^+ \to cs)$ = 100%.

Abstract

A search for a light charged Higgs boson, originating from the decay of a top quark and subsequently decaying into a charm quark and a strange antiquark, is presented. The data used in the analysis correspond to an integrated luminosity of 19.7 $fb^{−1}$ recorded in proton-proton collisions at $\sqrt {\bar{s}}$ = 8 TeV by the CMS experiment at the LHC. The search is performed in the process $t\bar{t} \to W ^{\pm} bH ^{\pm} \bar{b}$, where the W boson decays to a lepton (electron or muon) and a neutrino. The decays lead to a final state comprising an isolated lepton, at least four jets and large missing transverse energy. No significant deviation is observed in the data with respect to the standard model predictions, and model-independent upper limits are set on the branching fraction $B(t \to H^{+}b)$, ranging from 1.2 to 6.5% for a charged Higgs boson with mass between 90 and 160 GeV, under the assumption that $B(H^+ \to cs)$ = 100%.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2015
Deposited On:15 Feb 2016 14:11
Last Modified:08 Dec 2017 19:00
Publisher:Springer
ISSN:1029-8479
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP11(2015)190
Related URLs:http://arxiv.org/abs/1509.07645 (Organisation)

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