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http://bura.brunel.ac.uk/handle/2438/11660
Title: | Limits on the Higgs boson lifetime and width from its decay to four charged leptons |
Authors: | Khachatryan, V Sirunyan, AM Tumasyan, A Adam, W Asilar, E Bergauer, T Brandstetter, J Brondolin, E Dragicevic, M Erö, J Flechl, M Friedl, M Frühwirth, R Ghete, VM Hartl, C Hörmann, N Hrubec, J Jeitler, M Knünz, V König, A Krammer, M Krätschmer, I Liko, D Matsushita, T Mikulec, I Rabady, D Rahbaran, B Rohringer, H Schieck, J Schöfbeck, R Strauss, J Treberer-Treberspurg, W Waltenberger, W Wulz, CE Mossolov, V Shumeiko, N Suarez Gonzalez, J Alderweireldt, S Cornelis, T De Wolf, EA Janssen, X Knutsson, A Lauwers, J Luyckx, S Ochesanu, S Rougny, R Van De Klundert, M Van Haevermaet, H Van Mechelen, P Van Remortel, N Van Spilbeeck, A Abu Zeid, S Blekman, F D'Hondt, J Daci, N De Bruyn, I Deroover, K Heracleous, N Keaveney, J Lowette, S Moreels, L Olbrechts, A Python, Q Strom, D Tavernier, S Van Doninck, W Van Mulders, P Van Onsem, GP Van Parijs, I Barria, P Caillol, C Clerbaux, B De Lentdecker, G Delannoy, H Fasanella, G Favart, L Gay, APR Grebenyuk, A Lenzi, T Léonard, A Maerschalk, T Marinov, A Perniè, L Randle-Conde, A Reis, T Seva, T Vander Velde, C Vanlaer, P Yonamine, R Zenoni, F Zhang, F Beernaert, K Benucci, L Cimmino, A Crucy, S Dobur, D Fagot, A Garcia, G Gul, M McCartin, J |
Issue Date: | 2015 |
Citation: | Physical Review D - Particles, Fields, Gravitation and Cosmology, 2015, 92 (7) |
Abstract: | © 2015 CERN, for the CMS. Published by the American Physical Society. Constraints on the lifetime and width of the Higgs boson are obtained from H→ZZ→4ℓ events using data recorded by the CMS experiment during the LHC run 1 with an integrated luminosity of 5.1 and 19.7fb-1 at a center-of-mass energy of 7 and 8 TeV, respectively. The measurement of the Higgs boson lifetime is derived from its flight distance in the CMS detector with an upper bound of τH<1.9×10-13s at the 95% confidence level (C.L.), corresponding to a lower bound on the width of ΓH>3.5×10-9MeV. The measurement of the width is obtained from an off-shell production technique, generalized to include anomalous couplings of the Higgs boson to two electroweak bosons. From this measurement, a joint constraint is set on the Higgs boson width and a parameter fΛQ that expresses an anomalous coupling contribution as an on-shell cross-section fraction. The limit on the Higgs boson width is ΓH<46MeV with fΛQ unconstrained and ΓH<26MeV for fΛQ=0 at the 95% C.L. The constraint fΛQ<3.8×10-3 at the 95% C.L. is obtained for the expected standard model Higgs boson width. |
URI: | http://bura.brunel.ac.uk/handle/2438/11660 |
DOI: | http://dx.doi.org/10.1103/PhysRevD.92.072010 |
ISSN: | 1550-7998 1550-2368 |
Appears in Collections: | Publications |
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