Authors
Serguei Chatrchyan, Vardan Khachatryan, AM Sirunyan, A Tumasyan, Wolfgang Adam, T Bergauer, M Dragicevic, J Erö, C Fabjan, M Friedl, R Frühwirth, VM Ghete, C Hartl, N Hörmann, J Hrubec, M Jeitler, W Kiesenhofer, V Knünz, M Krammer, I Krätschmer, D Liko, I Mikulec, D Rabady, B Rahbaran, H Rohringer, R Schöfbeck, J Strauss, A Taurok, W Treberer-Treberspurg, W Waltenberger, C-E Wulz, V Mossolov, N Shumeiko, J Suarez Gonzalez, S Alderweireldt, M Bansal, S Bansal, T Cornelis, EA De Wolf, X Janssen, A Knutsson, S Luyckx, L Mucibello, S Ochesanu, B Roland, R Rougny, H Van Haevermaet, P Van Mechelen, A Van Spilbeeck, F Blekman, S Blyweert, J D’Hondt, N Heracleous, A Kalogeropoulos, J Keaveney, TJ Kim, S Lowette, M Maes, A Olbrechts, D Strom, S Tavernier, W Van Doninck, P Van Mulders, GP Van Onsem, I Villella, C Caillol, B Clerbaux, G De Lentdecker, L Favart, APR Gay, A Léonard, PE Marage, A Mohammadi, L Perniè, T Reis
Publication date
2014/5/14
Journal
Physical Review D
Volume
89
Issue
9
Pages
092007
Publisher
American Physical Society
Description
The properties of a Higgs boson candidate are measured in the H→ Z Z→ 4 ℓ decay channel, with ℓ= e, μ, using data from p p collisions corresponding to an integrated luminosity of 5.1 fb− 1 at the center-of-mass energy of s= 7 TeV and 19.7 fb− 1 at s= 8 TeV, recorded with the CMS detector at the LHC. The new boson is observed as a narrow resonance with a local significance of 6.8 standard deviations, a measured mass of 125.6±0.4 (stat)±0.2 (syst) GeV, and a total width≤ 3.4 GeV at the 95% confidence level. The production cross section of the new boson times its branching fraction to four leptons is measured to be 0.93− 0.23+ 0.26 (stat)− 0.09+ 0.13 (syst) times that predicted by the standard model. Its spin-parity properties are found to be consistent with the expectations for the standard-model Higgs boson. The hypotheses of a pseudoscalar and all tested spin-1 boson hypotheses are excluded at the 99 …
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