Publication
Search for a standard model-like Higgs boson in the $μ^+μ^−$ and $e^+e^−$ decay channels at the LHC
| dc.contributor.author | CMS collaboration (2145 authors) | |
| dc.contributor.author | Hollar, Jonathan | |
| dc.contributor.author | Nayak, Aruna | |
| dc.contributor.author | Bargassa, Pedrame | |
| dc.contributor.author | Beirão Da Cruz E Silva, Cristóvão | |
| dc.contributor.author | Faccioli, Pietro | |
| dc.contributor.author | Ferreira Parracho, Pedro Guilherme | |
| dc.contributor.author | Gallinaro, Michele | |
| dc.contributor.author | Lloret Iglesias, Lara | |
| dc.contributor.author | Nguyen, Federico | |
| dc.contributor.author | Rodrigues Antunes, Joao | |
| dc.contributor.author | Seixas, Joao | |
| dc.contributor.author | Varela, Joao | |
| dc.contributor.author | Vischia, Pietro | |
| dc.contributor.author | David Tinoco Mendes, Andre | |
| dc.contributor.author | Musella, Pasquale | |
| dc.contributor.author | Silva, Pedro | |
| dc.contributor.author | Pela, Joao | |
| dc.contributor.author | Leonardo, Nuno | |
| dc.date.accessioned | 2019-02-04T05:17:09Z | |
| dc.date.available | 2019-02-04T05:17:09Z | |
| dc.date.issued | 2015-05-11 | |
| dc.date.updated | 2019-02-04T05:17:09Z | |
| dc.description.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 ( 6.5−1.9+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 ≈3.7×105 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. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Lett. B744 (2015) 184-207; DOI 10.1016/j.physletb.2015.03.048 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physletb.2015.03.048 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26713 | |
| dc.language.iso | eng | |
| dc.title | Search for a standard model-like Higgs boson in the $μ^+μ^−$ and $e^+e^−$ decay channels at the LHC | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |