E-viri
PDF
Recenzirano
Odprti dostop
-
Madlener, T.; Rad, N.; Schieck, J.; Di Croce, D.; Van Haevermaet, H.; Cornelis, T.; Leggat, D.; Shaheen, S.M.; Levin, A.; Mao, Y.; González Hernández, C.F.; Antunovic, Z.; Konstantinou, S.; Mavromanolakis, G.; Carrera Jarrin, E.; Kinnunen, R.; Lampén, T.; Collard, C.; Chierici, R.; Müller, T.; Geiser, A.; Kogler, R.; Lange, J.; Husemann, U.; Panagiotou, A.; Pasztor, G.; Horvath, D.; Raics, P.; Trocsanyi, Z.L.; Sahoo, D.K.; Kumari, P.; Nandan, S.; De Palma, M.; Ciocca, C.; Siroli, G.P.; Re, V.; Rizzi, A.; Tenchini, R.; Meridiani, P.; Quaranta, C.; Demaria, N.; Moon, D.H.; Castaneda Hernandez, A.; Murillo Quijada, J.A.; Raicevic, N.; Bunkowski, K.; Byszuk, A.; Gninenko, S.; Polikarpov, S.; Bayshev, I.; Volkov, A.; Milenovic, P.; Folgueras, S.; Rodríguez Bouza, V.; Vila, I.; Bocci, A.; Brondolin, E.; Deelen, N.; Deile, M.; Funk, W.; Pfeiffer, A.; Dorfer, C.; Neutelings, I.; Lin, W.; Chen, P.H.; Steen, A.; Bat, A.; Ball, F.; Sakuma, T.; Wardle, N.; Brainerd, C.; Flores, C.; Bachtis, M.; Wimpenny, S.; Yates, B.R.; Klein, D.; Ulmer, K.A.; Frankenthal, A.; Abdullin, S.; Freeman, J.; Gottschalk, E.; Johnson, M.; Tkaczyk, S.; Uplegger, L.; Joshi, Y.R.; Tonjes, M.B.; Baringer, P.; Abercrombie, D.; Niu, X.; Gunter, T.; Mcalister, I.; Winer, B.L.; Bodek, A.; Somalwar, S.; De Mattia, M.; Eusebi, R.; Damgov, J.; De Guio, F.; Kunori, S.; Caillol, C.
Physics letters. B, 10/2019, Letnik: 797Journal Article
A search for decays of the Higgs and Z boson to pairs of J/ψ or Y(nS) (n = 1, 2, 3) mesons, with their subsequent decay to μ+μ− pairs, is presented. The analysis uses data from proton-proton collisions at s=13TeV, collected with the CMS detector at the LHC in 2017 and corresponding to an integrated luminosity of 37.5fb−1. While an observation of such a decay with this sample would indicate the presence of physics beyond the standard model, no significant excess is observed. Upper limits at 95% confidence level are placed on the branching fractions of these decays. In the J/ψ pair channel, the limits are 1.8×10−3 and 2.2×10−6 for the Higgs and Z boson, respectively, while in the combined Y(nS) pair channel, the limits are 1.4×10−3 and 1.5×10−6, respectively, when the mesons from the Higgs and Z boson decay are assumed to be unpolarized. When fully longitudinal and transverse polarizations are considered the limits reduce by about 22–29% and increase by about 10–13%, respectively.
