Data di Pubblicazione:
2015
Citazione:
(2015). Differential branching fraction and angular analysis of Λb0 → Λμ+μ- decays [journal article - articolo]. In JOURNAL OF HIGH ENERGY PHYSICS. Retrieved from https://hdl.handle.net/10446/269170
Abstract:
The differential branching fraction of the rare decay Lambda(0)(b) -> Lambda mu(+)mu(-) is measured as a function of q(2), the square of the dimuon invariant mass. The analysis is performed using proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb(-1), collected by the LHCb experiment. Evidence of signal is observed in the q(2) region below the square of the J/psi mass. Integrating over 15 < q(2) < 20 GeV2/c(4) the differential branching fraction is measured as dB(Lambda(0)(b) -> Lambda mu(+)mu(-))/dq(2) = (1.18(-0.08)(+0.09) +/- 0.03 +/- 0.27) x 10(-7) (GeV2/c(4))(-1) where the uncertainties are statistical, systematic and due to the normalisation mode Lambda(0)(b) -> J/psi Lambda , respectively. In the q(2) intervals where the signal is observed, angular distributions are studied and the forward-backward asymmetries in the dimuon (A(FB)(l)) and hadron (A(FB)(h)) systems are measured for the first time. In the range 15 < q(2) < 20GeV(2)/c(4) they are found to be
A(FB)(l) = -0.05 +/- 0.09 (stat) +/- 0.03 (syst) and
A(FB)(h) = -0.29 +/- 0.07 (stat) +/- 0.03 (syst)
A(FB)(l) = -0.05 +/- 0.09 (stat) +/- 0.03 (syst) and
A(FB)(h) = -0.29 +/- 0.07 (stat) +/- 0.03 (syst)
Tipologia CRIS:
1.1.01 Articoli/Saggi in rivista - Journal Articles/Essays
Elenco autori:
Aaij, R; Adeva, B; Adinolfi, M; Affolder, A; 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; Anderson, J; Andreotti, M; Andrews, Je; Appleby, Rb; Gutierrez, Oa; Archilli, F; Artamonov, A; Artuso, M; Aslanides, E; Auriemma, G; Baalouch, M; Bachmann, S; Back, Jj; Badalov, A; Baesso, C; Baldini, W; Barlow, Rj; Barschel, C; Barsuk, S; Barter, W; Batozskaya, V; Battista, V; Bay, A; Beaucourt, L; Beddow, J; Bedeschi, F; Bediaga, I; Bel, Lj; Belyaev, I; Ben-Haim, E; Bencivenni, G; Benson, S; Benton, J; Berezhnoy, A; Bernet, R; Bertolin, A; Bettler, Mo; van Beuzekom, M; Bien, A; Bifani, S; Bird, T; Bizzeti, A; Blake, T; Blanc, F; Blouw, J; Blusk, S; Bocci, V; Bondar, A; Bondar, N; Bonivento, W; Borghi, S; Borsato, M; Bowcock, Tjv; Bowen, E; Bozzi, C; Braun, S; Brett, D; Britsch, M; Britton, T; Brodzicka, J; Brook, Nh; Bursche, A; Buytaert, J; Cadeddu, S; Calabrese, R; Calvi, M; Gomez, Mc; Campana, P; Perez, Dc; Capriotti, L; Carbone, A; Carboni, G; Cardinale, R; Cardini, A; Carniti, P; Carson, L; Akiba, Kc; Mohr, Rc; Casse, G; Cassina, L; Garcia, Lc; Cattaneo, M; Cauet, C; Cavallero, G; Cenci, R; Charles, M; Charpentier, P; Chefdeville, M; Chen, S; Cheung, Sf; Chiapolini, N; Chrzaszcz, M; Vidal, Xc; Ciezarek, G; Clarke, Pel; Clemencic, M; Cliff, Hv; Closier, J; Coco, V; Cogan, J; Cogneras, E; Cogoni, V; Cojocariu, L; Collazuol, G; Collins, P; Comerma-Montells, A; Contu, A; Cook, A; Coombes, M; Coquereau, S; Corti, G; Corvo, M; Counts, I; Couturier, B; Cowan, Ga; Craik, Dc; Crocombe, Ac; Torres, Mc; Cunliffe, S; Currie, R; D'Ambrosio, C; Dalseno, J; David, Pny; Davis, A; De Bruyn, K; De Capua, S; De Cian, M; De Miranda, Jm; De Paula, L; De Silva, W; De Simone, P; Dean, Ct; Decamp, D; Deckenhoff, M; Del Buono, L; Deleage, N; Derkach, D; Deschamps, O; Dettori, F; Dey, B; Di Canto, A; Di Ruscio, F; Dijkstra, H; Donleavy, S; Dordei, F; Dorigo, M; Suarez, Ad; Dossett, D; Dovbnya, A; Dreimanis, K; Dujany, G; Dupertuis, F; Durante, P; Dzhelyadin, R; Dziurda, A; Dzyuba, A; Easo, S; Egede, U; Egorychev, V; Eidelman, S; Eisenhardt, S; Eitschberger, U; Ekelhof, R; Eklund, L; El Rifai, I; Elsasser, C; Ely, S; Esen, S; Evans, Hm; Evans, T; Falabella, A; Farber, C; Farinelli, C; Farley, N; Farry, S; Fay, R; Ferguson, D; Albor, Vf; Ferrari, F; Rodrigues, Ff; Ferro-Luzzi, M; Filippov, S; Fiore, M; Fiorini, M; Firlej, M; Fitzpatrick, C; Fiutowski, T; Fol, P; Fontana, M; Fontanelli, F; Forty, R; Francisco, O; Frank, M; Frei, C; Frosini, M; Fu, J; Furfaro, E; Torreira, Ag; Galli, D; Gallorini, S; Gambetta, S; Gandelman, M; Gandini, P; Gao, Y; Pardinas, Jg; Garofoli, J; Tico, Jg; Garrido, L; Gascon, D; Gaspar, C; Gastaldi, U; Gauld, R; Gavardi, L; Gazzoni, G; Geraci, A; Gerick, D; Gersabeck, E; Gersabeck, M; Gershon, T; Ghez, P; Gianelle, A; Giani, S; Gibson, V; Giubega, L; Gligorov, Vv; Gobel, C; Golubkov, D; Golutvin, A; Gomes, A; Gotti, C; Gandara, Mg; Diaz, Rg; Cardoso, Lag; Grauges, E; Graverini, E; Graziani, G; Grecu, A; Greening, E; Gregson, S; Griffith, P; Grillo, L; Grunberg, O; Gui, B; Gushchin, E; Guz, Y; Gys, T; Hadjivasiliou, C; Haefeli, G; Haen, C; Haines, Sc; Hall, S; Hamilton, B; Hampson, T; Han, X; Hansmann-Menzemer, S; Harnew, N; Harnew, St; Harrison, J; He, J; Head, T; Heijne, V; Hennessy, K; Henrard, P; Henry, L; Morata, Jah; van Herwijnen, E; Hess, M; Hicheur, A; Hill, D; Hoballah, M; Hombach, C; Hulsbergen, W; Humair, T; Hussain, N; Hutchcroft, D; Hynds, D; Idzik, M; Ilten, P; Jacobsson, R; Jaeger, A; Jalocha, J; Jans, E; Jawahery, A; Jing, F; John, M; Johnson, D; Jones, Cr; Joram, C; Jost, B; Jurik, N; Kandybei, S; Kanso, W; Karacson, M; Karbach, Tm; Karodia, S; Kelsey, M; Kenyon, Ir; Kenzie, M; Ketel, T; Khanji, B; Khurewathanakul, C; Klaver, S; Klimaszewski, K; Kochebina, O; Kolpin, M; Komarov, I; Koopman, Rf; Koppenburg, P; Korolev, M; Kravchuk, L; Kreplin, K; Kreps, M; Krocker, G; Krokovny, P; Kruse, F; Kucewicz, W; Ku
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