2014/10/31 by V. Khachatryan, CMS Collaboration, A. M. Sirunyan +98 · 2 citations
Physics and Astronomy · #Boson #Branching fraction #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Lepton #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Standard Model (mathematical formulation) #hep-ex
paper · pdf · doi:10.1016/j.physletb.2015.03.048
published as Phys. Lett. B 744 (2015) 184 · Replaced with published version. Added journal reference and DOI
openalex publication_date 2015/04/03 · arxiv created 2015/04/22 · arxiv updated 2015/04/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 − 1.9 + 2.8 ) 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 × 10 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.