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Search for narrow high-mass resonances in proton–proton collisions at $\sqrt{s} = 8 TeV$ decaying to a $Z$ and a Higgs Boson


CMS Collaboration; Khachatryan, V; Sirunyan, A M; Tumasyan, A; Amsler, C; Canelli, F; Chiochia, V; Hinzmann, A; De Cosa, A; Hreus, T; Kilminster, B; Lange, C; Ngadiuba, J; Pinna, D; Robmann, P; Ronga, F J; Taroni, S; Yang, Y; et al (2015). Search for narrow high-mass resonances in proton–proton collisions at $\sqrt{s} = 8 TeV$ decaying to a $Z$ and a Higgs Boson. Physics Letters B, 748:255-277.

Abstract

The first search for a narrow, high-mass resonance decaying into $Z$ and Higgs (H) bosons is presented. The final state studied consists of a merged jet pair and a tau pair resulting from the decays of $Z$ and $H$ bosons, respectively. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 8 TeV, collected with the CMS experiment in 2012, and corresponding to an integrated luminosity of 19.7 inverse femtobarns. In the resonance mass range of interest, which extends from 0.8 to 2.5 TeV, the $Z$ and $H$ bosons are produced with large momenta, which implies that the final products of the two quarks or the two tau leptons must be detected within a small angular interval. From a combination of all possible decay modes of the tau leptons, production cross sections in a range between 0.9 and 27.8 fb are excluded at 95% confidence level, depending on the resonance mass.

Abstract

The first search for a narrow, high-mass resonance decaying into $Z$ and Higgs (H) bosons is presented. The final state studied consists of a merged jet pair and a tau pair resulting from the decays of $Z$ and $H$ bosons, respectively. The analysis is based on a data sample of proton-proton collisions at a center-of-mass energy of 8 TeV, collected with the CMS experiment in 2012, and corresponding to an integrated luminosity of 19.7 inverse femtobarns. In the resonance mass range of interest, which extends from 0.8 to 2.5 TeV, the $Z$ and $H$ bosons are produced with large momenta, which implies that the final products of the two quarks or the two tau leptons must be detected within a small angular interval. From a combination of all possible decay modes of the tau leptons, production cross sections in a range between 0.9 and 27.8 fb are excluded at 95% confidence level, depending on the resonance mass.

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:17 February 2015
Deposited On:18 Feb 2016 10:35
Last Modified:14 Feb 2018 11:08
Publisher:Elsevier
ISSN:0370-2693
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1016/j.physletb.2015.07.011
Other Identification Number:arXiv:1502.04994v2

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