Search for a pseudoscalar boson decaying into a Z boson and the 125 GeV Higgs boson in llbb final states

Results are reported on a search for decays of a pseudoscalar A boson into a Z boson and a light scalar h boson, where the Z boson decays into a pair of oppositely-charged electrons or muons, and the h boson decays into b anti-b. The search is based on data from proton-proton collisions at a center-...

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Veröffentlicht in:	Physics letters. B 2015-09, Vol.748, p.221-243
Hauptverfasser:	Khachatryan, V., Besançon, M., Couderc, F., Dejardin, M., Denegri, D., Fabbro, B., Faure, J.L., Favaro, C., Ferri, F., Ganjour, S., Givernaud, A., Gras, P., Monchenault, G. Hamel De, Jarry, P., Locci, E., Machet, M., Malcles, J., Rander, J., Rosowsky, A., Titov, M., Zghiche, A., Baffioni, S., Beaudette, F., Busson, P., Cadamuro, L., Chapon, E., Charlot, C., Dahms, T., Davignon, O., Filipovic, N., Florent, A., Granier de Cassagnac, R., Lisniak, S., Mastrolorenzo, L., Mine, P., Naranjo, I.N., Nguyen, M., Ochando, C., Ortona, G., Paganini, P., Regnard, S., Salerno, R., Sauvan, J.B., Sirois, Y., Strebler, T., Yilmaz, Y., Zabi, A., Agram, J.-L., Andrea, J., Aubin, A., Bloch, D., Brom, J.-M., Buttignol, M., Chabert, E.C., Chanon, N., Collard, C., Conte, E., Fontaine, J.-C., Gele, D., Goerlach, U., Goetzmann, C., Bihan, A.-C. Le, Merlin, J.A., Skovpen, K., Hove, P. Van, Gadrat, S., Beauceron, S., Beaupere, N., Bernet, C., Boudoul, G., Bouvier, E., Brochet, S., Montoya, C.A. Carrillo, Chasserat, J., Chierici, R., Contardo, D., Courbon, B., Depasse, P., Mamouni, H. El, Fan, J., Fay, J., Gascon, S., Gouzevitch, M., Ille, B., Laktineh, I.B., Lethuillier, M., Mirabito, L., Pequegnot, A.L., Perries, S., Alvarez, J.D. Ruiz, Sabes, D., Sgandurra, L., Sordini, V., Donckt, M. Vander, Verdier, P., Viret, S., Xiao, H.
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Experiment Physics
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Zusammenfassung:	Results are reported on a search for decays of a pseudoscalar A boson into a Z boson and a light scalar h boson, where the Z boson decays into a pair of oppositely-charged electrons or muons, and the h boson decays into b anti-b. The search is based on data from proton-proton collisions at a center-of-mass energy sqrt(s)=8 TeV collected with the CMS detector, corresponding to an integrated luminosity of 19.7 inverse femtobarns. The h boson is assumed to be the recently discovered standard model-like Higgs boson with a mass of 125 GeV. With no evidence for signal, upper limits are obtained on the product of the production cross section and the branching fraction of the A boson in the Zh channel. Results are also interpreted in the context of two Higgs doublet models.
ISSN:	0370-2693
DOI:	10.1016/j.physletb.2015.07.010