Search for a standard model-like Higgs boson in the and decay channels at the LHC
A search is presented for a standard model-like Higgs boson decaying to the μ+μ- ore+e- 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-1 at a centre-of-mass energy of 7 TeV and 19.7 fb-1 at 8 TeV for the μ+μ- search, and of 19.7 fb-1 at 8 TeV for the e+e- 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+μ-, the observed (expected) upper limit on the production rate is found to be 7.4 ( ) times the standard model value. This corresponds to an upper limit on the branching fraction of 0.0016. Similarly, for e+e-, an upper limit of 0.0019 is placed on the branching fraction, which is ≈3.7×105 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.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- CMS Collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1213874
- Alternate ID(s):
- OSTI ID: 1234860
- Report Number(s):
- FERMILAB-PUB-14-438-CMS; CERN-PH-EP-2014-243; CMS-HIG-13-007; S0370269315002117; PII: S0370269315002117
- Journal Information:
- Physics Letters B, Journal Name: Physics Letters B Vol. 744 Journal Issue: C; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
Web of Science
Similar Records
Search for a low-mass pseudoscalar Higgs boson produced in association with a pair in pp collisions at
Search for heavy Majorana neutrinos in + jets events in proton–proton collisions at