Search for a standard model-like Higgs boson in the μ[superscript +]μ[superscript −] and e[superscript +]e[superscript −] decay channels at the LHC

Search for a standard model-like Higgs boson in the μ[superscript +]μ[superscript −] and e[superscript +]e[superscript −] decay channels at the LHC

A search is presented for a standard model-like Higgs boson decaying to the μ[superscript +]μ[superscript −] or e[superscript +]e[superscript −] final states based on proton–proton collisions recorded by the CMS experiment at the CERN LHC. The data correspond to integrated luminosities of 5.0 fb[sup...

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Bibliographic Details
Main Authors: Apyan, Aram, Barbieri, Richard Alexander, Busza, Wit, Cali, Ivan Amos, Di Matteo, Leonardo, Dutta, Valentina, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Gulhan, Doga Can, Klute, Markus, Lai, Yue Shi, Lee, Yen-Jie, Levin, Andrew Michael, Ma, Teng, Paus, Christoph M. E., Ralph, Duncan Kelley, Stephans, George S. F., Velicanu, Dragos Alexandru, Veverka, Jan, Wyslouch, Boleslaw, Yang, Mingming, Zanetti, Marco, Bauer, Gerry P, Chan, M., Luckey Jr, P David, Roland, Christof E, Roland, Gunther M, Stoeckli, Fabian, Sumorok, Konstanty C, Wyslouch, Victoria
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: Elsevier 2015
Online Access:http://hdl.handle.net/1721.1/98212
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0001-6332-5839
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0002-9418-6656
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0002-7945-005X
https://orcid.org/0000-0003-3681-0649
https://orcid.org/0000-0003-1486-606X
https://orcid.org/0000-0003-2593-7767
https://orcid.org/0000-0001-9236-6621
https://orcid.org/0000-0002-0869-5631
https://orcid.org/0000-0002-1136-6900
Description
Summary:A search is presented for a standard model-like Higgs boson decaying to the μ[superscript +]μ[superscript −] or e[superscript +]e[superscript −] final states based on proton–proton collisions recorded by the CMS experiment at the CERN LHC. The data correspond to integrated luminosities of 5.0 fb[superscript −1] at a centre-of-mass energy of 7 TeV and 19.7 fb[superscript −1] at 8 TeV for the μ[superscript +]μ[superscript −] search, and of 19.7 fb[superscript −1] at 8 TeV for the e[superscript +]e[superscript −] search. Upper limits on the production cross section times branching fraction at the 95% confidence level are reported for Higgs boson masses in the range from 120 to 150 GeV. For a Higgs boson with a mass of 125 GeV decaying to μ[superscript +]μ[superscript −], the observed (expected) upper limit on the production rate is found to be 7.4 (6.5[+2.8 over −1.9]) times the standard model value. This corresponds to an upper limit on the branching fraction of 0.0016. Similarly, for e[superscript +]e[superscript −], an upper limit of 0.0019 is placed on the branching fraction, which is ≈3.7 × 10[superscript 5] times the standard model value. These results, together with recent evidence of the 125 GeV boson coupling to τ-leptons with a larger branching fraction consistent with the standard model, confirm that the leptonic couplings of the new boson are not flavour-universal.

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