Data di Pubblicazione:
2017
Citazione:
(2017). Test of lepton universality with B 0 → K *0 ℓ + ℓ − decays [journal article - articolo]. In JOURNAL OF HIGH ENERGY PHYSICS. Retrieved from https://hdl.handle.net/10446/265349
Abstract:
A test of lepton universality, performed by measuring the ratio of the branching fractions of the B-0 -> K*(0)mu(+) mu(-) and B-0 -> K*e(+)e(-) decays, R-K*0, is presented. The K*(0) meson is reconstructed in the final state K+pi(-), which is required to have an invariant mass within 100 MeV/c(2) of the known K*(892)(0) mass. The analysis is performed using proton-proton collision data, corresponding to an integrated luminosity of about 3 fb(-1), collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The ratio is measured in two regions of the dilepton invariant mass squared, q(2), to be R-K*0 - {0.66(-0.007)(+0.11)(stat) +/- 0.03(syst) for 0.045 < q(2) < GeV2/c(4), 0.69(-0.07)(+0.11)(stat) +/- 0.05(syst) for 1.1 < q(2) < 6.0 GeV2/c(4). The corresponding 95.4% confidence level intervals are [0.52, 0.89] and [0.53, 0.94]. The results, which represent the most precise measurements of R-K*0 to date, are compatible with the Standard Model expectations at the level of 2.1-2.3 and 2.4-2.5 standard deviations in the two q(2) regions, respectively.
Tipologia CRIS:
1.1.01 Articoli/Saggi in rivista - Journal Articles/Essays
Elenco autori:
Aaij, R; Adeva, B; Adinolfi, M; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Ali, S; Alkhazov, G; Cartelle, Pa; Alves, Aa; Amato, S; Amerio, S; Amhis, Y; An, L; Anderlini, L; Andreassi, G; Andreotti, M; Andrews, Je; Appleby, Rb; Archilli, F; D'Argent, P; Romeu, Ja; Artamonov, A; Artuso, M; Aslanides, E; Auriemma, G; Baalouch, M; Babuschkin, I; Bachmann, S; Back, Jj; Badalov, A; Baesso, C; Baker, S; Balagura, V; Baldini, W; Baranov, A; Barlow, Rj; Barschel, C; Barsuk, S; Barter, W; Baryshnikov, F; Baszczyk, M; Batozskaya, V; Battista, V; Bay, A; Beaucourt, L; Beddow, J; Bedeschi, F; Bediaga, I; Beiter, A; Bel, Lj; Bellee, V; Belloli, N; Belous, K; Belyaev, I; Ben-Haim, E; Bencivenni, G; Benson, S; Beranek, S; Berezhnoy, A; Bernet, R; Berninghoff, D; Bertolin, A; Betancourt, C; Betti, F; Bettler, Mo; van Beuzekom, M; Bezshyiko, I; Bifani, S; Billoir, P; Birnkraut, A; Bitadze, A; Bizzeti, A; Blake, T; Blanc, F; Blouw, J; Blusk, S; Bocci, V; Boettcher, T; Bondar, A; Bondar, N; Bonivento, W; Bordyuzhin, I; Borgheresi, A; Borghi, S; Borisyak, M; Borsato, M; Borysova, M; Bossu, F; Boubdir, M; Bowcock, Tjv; Bowen, E; Bozzi, C; Braun, S; Britton, T; Brodzicka, J; Buchanan, E; Burr, C; Bursche, A; Buytaert, J; Byczynski, W; Cadeddu, S; Cai, H; Calabrese, R; Calladine, R; Calvi, M; Gomez, Mc; Camboni, A; Campana, P; Perez, Dhc; Capriotti, L; Carbone, A; Carboni, G; Cardinale, R; Cardini, A; Carniti, P; Carson, L; Akiba, Kc; Casse, G; Cassina, L; Garcia, Lc; Cattaneo, M; Cavallero, G; Cenci, R; Chamont, D; Charles, M; Charpentier, P; Chatzikonstantinidis, G; Chefdeville, M; Chen, S; Cheung, Sf; Chobanova, V; Chrzaszcz, M; Chubykin, A; Vidal, Xc; Ciezarek, G; Clarke, Pel; Clemencic, M; Cliff, Hv; Closier, J; Coco, V; Cogan, J; Cogneras, E; Cogoni, V; Cojocariu, L; Collins, P; Colombo, T; Comerma-Montells, A; Contu, A; Cook, A; Coombs, G; Coquereau, S; Corti, G; Corvo, M; Sobral, Cmc; Couturier, B; Cowan, Ga; Craik, Dc; Crocombe, A; Torres, Mc; Cunliffe, S; Currie, R; D'Ambrosio, C; Marinho, Fd; Dall'Occo, E; Dalseno, J; Davis, A; Francisco, Od; De Bruyn, K; De Capua, S; De Cian, M; De Miranda, Jm; De Paula, L; De Serio, M; De Simone, P; Dean, Ct; Decamp, D; Deckenhoff, M; Del Buono, L; Dembinski, Hp; Demmer, M; Dendek, A; Derkach, D; Deschamps, O; Dettori, F; Dey, B; Di Canto, A; Di Nezza, P; Dijkstra, H; Dordei, F; Dorigo, M; Suarez, Ad; Douglas, L; Dovbnya, A; Dreimanis, K; Dufour, L; Dujany, G; Dungs, K; Durante, P; Dzhelyadin, R; Dziewiecki, M; Dziurda, A; Dzyuba, A; Deleage, N; Easo, S; Ebert, M; Egede, U; Egorychev, V; Eidelman, S; Eisenhardt, S; Eitschberger, U; Ekelhof, R; Eklund, L; Ely, S; Esen, S; Evans, Hm; Evans, T; Falabella, A; Farley, N; Farry, S; Fay, R; Fazzini, D; Federici, L; Ferguson, D; Fernandez, G; Declara, Pf; Prieto, Af; Ferrari, F; Rodrigues, Ff; Ferro-Luzzi, M; Filippov, S; Fini, Ra; Fiore, M; Fiorini, M; Firlej, M; Fitzpatrick, C; Fiutowski, T; Fleuret, F; Fohl, K; Fontana, M; Fontanelli, F; Forshaw, Dc; Forty, R; Lima, Vf; Frank, M; Frei, C; Fu, J; Funk, W; Furfaro, E; Farber, C; Gabrie, E; Torreira, Ag; Galli, D; Gallorini, S; Gambetta, S; Gandelman, M; Gandini, P; Gao, Y; Martin, Lmg; Pardinas, Jg; Tico, Jg; Garrido, L; Garsed, Pj; Gascon, D; Gaspar, C; Gavardi, L; Gazzoni, G; Gerick, D; Gersabeck, E; Gersabeck, M; Gershon, T; Ghez, P; Giani, S; Gibson, V; Girard, Og; Giubega, L; Gizdov, K; Gligorov, Vv; Golubkov, D; Golutvin, A; Gomes, A; Gorelov, Iv; Gotti, C; Govorkova, E; Diaz, Rg; Cardoso, Lag; Grauges, E; Graverini, E; Graziani, G; Grecu, A; Greim, R; Griffith, P; Grillo, L; Gruber, L; Cazon, Brg; Grunberg, O; Gushchin, E; Guz, Y; Gys, T; Gobel, C; Hadavizadeh, T; Hadjivasiliou, C; Haefeli, G; Haen, C; Haines, Sc; Hamilton, B; Han, X; Hansmann-Menzemer, S; Harnew, N; Harnew, St; Harrison, J; Hatch, M; He, J; Head, T; Heister, A; Hennessy, K; Henrard, P; Henry, L; van Herwijnen, E; Hess, M; Hicheur, A; Hill, D; Hombach, C; Hopchev, Ph; Huard, Zc; Hulsbergen, W; Humair, T; Hushchyn, M; H
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