Measurement of the B->X(s)l(+)l(-) Branching Fraction and Search for Direct Violation from a Sum of Exclusive Final States
Articolo
Data di Pubblicazione:
2014
Abstract:
We measure the total branching fraction of the flavor-changing neutral-current process B → Xslþl−,
along with partial branching fractions in bins of dilepton and hadronic system (Xs) mass, using a sample
of 471 × 106 ϒð4SÞ → BB¯ events recorded with the BABAR detector. The admixture of charged and neutral
B mesons produced at PEP-II2 are reconstructed by combining a dilepton pair with 10 different Xs final
states. Extrapolating from a sum over these exclusive modes, we measure a lepton-flavor-averaged
inclusive branching fraction BðB → Xslþl−Þ ¼ ½6.73
þ0.70
−0.64
ðstatÞþ0.34
−0.25
ðexp systÞ 0.50ðmodel systÞ ×
10−6 for m2
lþl− > 0.1 GeV2=c4. Restricting our analysis exclusively to final states from which a decaying
B meson’s flavor can be inferred, we additionally report measurements of the direct CP asymmetry ACP in
bins of dilepton mass; over the full dilepton mass range, we find ACP ¼ 0.04 0.11 0.01 for a leptonflavor-
averaged sample.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
J. P. Lees;V. Poireau;V. Tisserand;E. Grauges;A. Palano;G. Eigen;B. Stugu;D. N. Brown;L. T. Kerth;Yu. G. Kolomensky;M. J. Lee;G. Lynch;H. Koch;T. Schroeder;C. Hearty;T. S. Mattison;J. A. McKenna;R. Y. So;A. Khan;V. E. Blinov;A. R. Buzykaev;V. P. Druzhinin;V. B. Golubev;E. A. Kravchenko;A. P. Onuchin;S. I. Serednyakov;Yu. I. Skovpen;E. P. Solodov;K. Yu. Todyshev;A. N. Yushkov;A. J. Lankford;M. Mandelkern;B. Dey;J. W. Gary;O. Long;C. Campagnari;M. Franco Sevilla;T. M. Hong;D. Kovalskyi;J. D. Richman;C. A. West;A. M. Eisner;W. S. Lockman;B. A. Schumm;A. Seiden;D. S. Chao;C. H. Cheng;B. Echenard;K. T. Flood;D. G. Hitlin;T. S. Miyashita;P. Ongmongkolkul;F. C. Porter;R. Andreassen;Z. Huard;B. T. Meadows;B. G. Pushpawela;M. D. Sokoloff;L. Sun;P. C. Bloom;W. T. Ford;A. Gaz;U. Nauenberg;J. G. Smith;S. R. Wagner;R. Ayad;W. H. Toki;B. Spaan;R. Schwierz;D. Bernard;M. Verderi;S. Playfer;D. Bettoni;C. Bozzi;R. Calabrese;G. Cibinetto;E. Fioravanti;I. Garzia;E. Luppi;L. Piemontese;V. Santoro;A. Calcaterra;R. de Sangro;G. Finocchiaro;S. Martellotti;P. Patteri;I. M. Peruzzi;M. Piccolo;M. Rama;A. Zallo;R. Contri;E. Guido;M. Lo Vetere;M. R. Monge;S. Passaggio;C. Patrignani;E. Robutti;B. Bhuyan;V. Prasad;M. Morii;A. Adametz;U. Uwer;H. M. Lacker;P. D. Dauncey;U. Mallik;C. Chen;J. Cochran;W. T. Meyer;S. Prell;H. Ahmed;A. V. Gritsan;N. Arnaud;M. Davier;D. Derkach;G. Grosdidier;F. Le Diberder;A. M. Lutz;B. Malaescu;P. Roudeau;A. Stocchi;G. Wormser;D. J. Lange;D. M. Wright;J. P. Coleman;J. R. Fry;E. Gabathuler;D. E. Hutchcroft;D. J. Payne;C. Touramanis;A. J. Bevan;F. Di Lodovico;R. Sacco;G. Cowan;J. Bougher;D. N. Brown;C. L. Davis;A. G. Denig;M. Fritsch;W. Gradl;K. Griessinger;A. Hafner;E. Prencipe;K. R. Schubert;R. J. Barlow;G. D. Lafferty;R. Cenci;B. Hamilton;A. Jawahery;D. A. Roberts;R. Cowan;D. Dujmic;G. Sciolla;R. Cheaib;P. M. Patel;S. H. Robertson;P. Biassoni;N. Neri;F. Palombo;L. Cremaldi;R. Godang;P. Sonnek;D. J. Summers;M. Simard;P. Taras;G. De Nardo;D. Monorchio;G. Onorato;C. Sciacca;M. Martinelli;G. Raven;C. P. Jessop;J. M. LoSecco;K. Honscheid;R. Kass;J. Brau;R. Frey;N. B. Sinev;D. Strom;E. Torrence;E. Feltresi;M. Margoni;M. Morandin;M. Posocco;M. Rotondo;G. Simi;F. Simonetto;R. Stroili;S. Akar;E. Ben-Haim;M. Bomben;G. R. Bonneaud;H. Briand;G. Calderini;J. Chauveau;Ph. Leruste;G. Marchiori;J. Ocariz;S. Sitt;M. Biasini;E. Manoni;S. Pacetti;A. Rossi;C. Angelini;G. Batignani;S. Bettarini;M. Carpinelli;G. Casarosa;A. Cervelli;M. Chrzaszcz;F. Forti;M. A. Giorgi;A. Lusiani;B. Oberhof;E. Paoloni;A. Perez;G. Rizzo;J. J. Walsh;D. Lopes Pegna;J. Olsen;A. J. S. Smith;R. Faccini;F. Ferrarotto;F. Ferroni;M. Gaspero;L. Li Gioi;G. Piredda;C. Bünger;O. Grünberg;T. Hartmann;T. Leddig;C. Voß;R. Waldi;T. Adye;E. O. Olaiya;F. F. Wilson;S. Emery;G. Hamel de Monchenault;G. Vasseur;Ch. Yèche;F. Anulli;D. Aston;D. J. Bard;J. F. Benitez;C. Cartaro;M. R. Convery;J. Dorfan;G. P. Dubois-Felsmann;W. Dunwoodie;M. Ebert;R. C. Field;B. G. Fulsom;A. M. Gabareen;M. T. Graham;C. Hast;W. R. Innes;P. Kim;M. L. Kocian;D. W. G. S. Leith;P. Lewis;D. Lindemann;B. Lindquist;S. Luitz;V. Luth;H. L. Lynch;D. B. MacFarlane;D. R. Muller;H. Neal;S. Nelson;M. Perl;T. Pulliam;B. N. Ratcliff;A. Roodman;A. A. Salnikov;R. H. Schindle
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