Measurement of the properties of a Higgs boson in the four-lepton final state

The properties of a Higgs boson candidate are measured in the H arrow right ZZ arrow right 4l decay channel, with l = e, mu , using data from pp collisions corresponding to an integrated luminosity of 5.1 fb super(-1) at the center-of-mass energy of [radical]s = 7 TeV and 19.7 fb super(-1) at [radic...

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Veröffentlicht in:	Physical review. D 2014-05, Vol.89 (9), Article 092007
Hauptverfasser:	Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Erö, J., Fabjan, C., Friedl, M., Frühwirth, R., Ghete, V. M., Hartl, C., Hörmann, N., Hrubec, J., Jeitler, M., Kiesenhofer, W., Knünz, V., Krammer, M., Krätschmer, I., Liko, D., Mikulec, I., Rabady, D., Rahbaran, B., Rohringer, H., Schöfbeck, R., Strauss, J., Taurok, A., Treberer-Treberspurg, W., Waltenberger, W., Wulz, C.-E., Mossolov, V., Shumeiko, N., Suarez Gonzalez, J., Alderweireldt, S., Bansal, M., Bansal, S., Cornelis, T., De Wolf, E. A., Janssen, X., Knutsson, A., Luyckx, S., Mucibello, L., Ochesanu, S., Roland, B., Rougny, R., Van Haevermaet, H., Van Mechelen, P., Van Remortel, N., Van Spilbeeck, A., Blekman, F., Blyweert, S., D’Hondt, J., Heracleous, N., Kalogeropoulos, A., Keaveney, J., Kim, T. J., Lowette, S., Maes, M., Olbrechts, A., Strom, D., Tavernier, S., Van Doninck, W., Van Mulders, P., Van Onsem, G. P., Villella, I., Caillol, C., Clerbaux, B., De Lentdecker, G., Favart, L., Gay, A. P. R., Léonard, A., Marage, P. E., Mohammadi, A., Perniè, L., Reis, T., Seva, T., Thomas, L., Vander Velde, C., Vanlaer, P., Wang, J., Adler, V., Beernaert, K., Benucci, L., Cimmino, A., Costantini, S., Dildick, S., Garcia, G., Klein, B., Lellouch, J., Mccartin, J., Ocampo Rios, A. A., Ryckbosch, D., Salva Diblen, S., Sigamani, M., Strobbe, N., Thyssen, F., Tytgat, M., Walsh, S., Yazgan, E.
Format:	Artikel
Sprache:	eng
Schlagworte:	Bosons Channels Confidence intervals Higgs bosons High Energy Physics - Experiment Hypotheses Large Hadron Collider Luminosity Physics Texts
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Beschreibung
Zusammenfassung:	The properties of a Higgs boson candidate are measured in the H arrow right ZZ arrow right 4l decay channel, with l = e, mu , using data from pp collisions corresponding to an integrated luminosity of 5.1 fb super(-1) at the center-of-mass energy of [radical]s = 7 TeV and 19.7 fb super(-1) at [radical]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 + or - 0.4(stat) + or - 0.2(syst) GeV, and a total width [< or =] 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 (ProQuest: Formulae and/or non-USASCII text omitted) (stat) (ProQuest: Formulae and/or non-USASCII text omitted) (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% confidence level or higher. All tested spin-2 boson hypotheses are excluded at the 95% confidence level or higher.
ISSN:	1550-7998 2470-0010 1550-2368 2470-0029
DOI:	10.1103/PhysRevD.89.092007