Journal article
Search for a standard model-like Higgs boson in the μ+μ− and e+e− decay channels at the LHC
Physics letters B Nuclear, elementary particle and high-energy physics, Vol.744, pp.184-207
05/11/2015
DOI: 10.1016/j.physletb.2015.03.048
Appears in Diamond Open Access
Abstract
A search is presented for a standard model-like Higgs boson decaying to the μ+μ− or e+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 (6.5+2.8
−1.9) 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.
Details
- Title: Subtitle
- Search for a standard model-like Higgs boson in the μ+μ− and e+e− decay channels at the LHC
- Creators
- CMS Collaboration (Institution)
- Contributors
- Elif A Albayrak (Contributor) - University of Iowa, Physics and AstronomyB. Bilki (Contributor) - University of IowaW Clarida (Contributor) - University of IowaKamuran Dilsiz (Contributor) - University of Iowa, Physics and AstronomyF. Duru (Contributor) - University of IowaM. Haytmyradov (Contributor) - University of IowaJ-P Merlo (Contributor) - University of IowaH Mermerkaya (Contributor) - University of IowaAlexi Mestvirishvili (Contributor) - University of Iowa, Physics and AstronomyA. Moeller (Contributor) - University of IowaJane M Nachtman (Contributor) - University of Iowa, Physics and AstronomyHasan Ogul (Contributor) - University of Iowa, Physics and AstronomyYasar Onel (Contributor) - University of Iowa, Physics and AstronomyF. Ozok (Contributor) - University of IowaAldo Penzo (Contributor) - University of Iowa, Physics and AstronomyR Rahmat (Contributor) - University of IowaS. Sen (Contributor) - University of IowaP Tan (Contributor) - University of IowaE. Tiras (Contributor) - University of IowaTaylan Yetkin (Contributor) - University of Iowa, Physics and AstronomyJames W Wetzel (Contributor) - University of Iowa, Physics and AstronomyKai Yi (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physics letters B Nuclear, elementary particle and high-energy physics, Vol.744, pp.184-207
- DOI
- 10.1016/j.physletb.2015.03.048
- ISSN
- 1873-2445
- Publisher
- Elsevier
- Grant note
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- Language
- English
- Date published
- 05/11/2015
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984439154902771
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