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Evidence for the rare decay B -> K(*)l(+)l(-) and measurement of the B -> Kl(+)l(-) branching fraction

Title:	Evidence for the rare decay B -> K(*)l(+)l(-) and measurement of the B -> Kl(+)l(-) branching fraction
Authors:	AUBERT B; BARATE R; BOUTIGNY D; GAILLARD JM; HICHEUR A; KARYOTAKIS Y; LEES JP; ROBBE P; TISSERAND V; ZGHICHE A; PALANO A; POMPILI A; CHEN JC; QI ND; RONG G; WANG P; ZHU YS; EIGEN G; OFTE I; STUGU B; ABRAMS GS; BORGLAND AW; BREON AB; BROWN DN; BUTTON SHAFER J; CAHN RN; CHARLES E; DAY CT; GILL MS; GRITSAN AV; GROYSMAN Y; JACOBSEN RG; KADEL RW; KADYK J; KERTH LT; KOLOMENSKY YG; KRAL JF; KUKARTSEV G; LECLERC C; LEVI ME; LYNCH G; MIR LM; ODDONE PJ; ORIMOTO TJ; PRIPSTEIN M; ROE NA; ROMOSAN A; RONAN MT; SHELKOV VG; TELNOV AV; WENZEL WA; FORD K; HARRISON TJ; HAWKES CM; KNOWLES DJ; MORGAN SE; PENNY RC; WATSON AT; WATSON NK; GOETZEN K; HELD T; KOCH H; LEWANDOWSKI B; PELIZAEUS M; PETERS K; SCHMUECKER H; STEINKE M; BARLOW NR; BOYD JT; CHEVALIER N; COTTINGHAM WN; KELLY MP; LATHAM TE; MACKAY C; WILSON FF; ABE K; CUHADAR DONSZELMANN T; HEARTY C; MATTISON TS; MCKENNA JA; THIESSEN D; KYBERD P; MCKEMEY AK; BLINOV VE; BUKIN AD; GOLUBEV VB; IVANCHENKO VN; KRAVCHENKO EA; ONUCHIN AP; SEREDNYAKOV SI; SKOVPEN YI; SOLODOV EP; YUSHKOV AN; BEST D; BRUINSMA M; CHAO M; KIRKBY D; LANKFORD AJ; MANDELKERN M; MOMMSEN RK; ROETHEL W; STOKER DP; BUCHANAN C; HARTFIEL BL; SHEN BC; DEL RE D; HADAVAND HK; HILL EJ; MACFARLANE DB; PAAR HP; RAHATLOU S; SHARMA V; BERRYHILL JW; CAMPAGNARI C; DAHMES B; KUZNETSOVA N; LEVY SL; LONG O; LU A; MAZUR MA; RICHMAN JD; VERKERKE W; BECK TW; BERINGER J; EISNER AM; HEUSCH CA; LOCKMAN WS; SCHALK T; SCHMITZ RE; SCHUMM BA; SEIDEN A; TURRI M; WALKOWIAK W; WILLIAMS DC; WILSON MG; ALBERT J; CHEN E; DUBOIS FELSMANN GP; DVORETSKII A; HITLIN DG; NARSKY I; PORTER FC; RYD A; SAMUEL A; YANG S; JAYATILLEKE S; MANCINELLI G; MEADOWS BT; SOKOLOFF MD; ABE T; BLANC F; BLOOM P; CHEN S; CLARK PJ; FORD WT; NAUENBERG U; OLIVAS A; RANKIN P; ROY J; SMITH JG; VAN HOEK WC; ZHANG L; HARTON JL; HU T; SOFFER A; TOKI WH; WILSON RJ; ZHANG J; ALTENBURG D; BRANDT T; BROSE J; COLBERG T; DICKOPP M; DUBITZKY RS; HAUKE A; LACKER HM; MALY E; MULLER PFEFFERKORN R; NOGOWSKI R; OTTO S; SCHUBERT J; SCHUBERT KR; SCHWIERZ R; SPAAN B; WILDEN L; BERNARD D; BONNEAUD GR; BROCHARD F; COHEN TANUGI J; GRENIER P; THIEBAUX C; VASILEIADIS G; VERDERI M; KHAN A; LAVIN D; MUHEIM F; PLAYFER S; SWAIN JE; ANDREOTTI, Mirco; AZZOLINI V; BETTONI D; BOZZI C; CALABRESE, Roberto; CIBINETTO G; LUPPI, Eleonora; NEGRINI M; PIEMONTESE L; SARTI A; TREADWELL E; ANULLI F; BALDINI FERROLI R; BIASINI M; CALCATERRA A; DE SANGRO R; FALCIAI D; FINOCCHIARO G; PATTERI P; PERUZZI IM; PICCOLO M; PIOPPI M; ZALLO A; BUZZO A; CAPRA R; CONTRI R; CROSETTI G; LO VETERE M; MACRI M; MONGE MR; PASSAGGIO S; PATRIGNANI C; ROBUTTI E; SANTRONI A; TOSI S; BAILEY S; MORII M; WON E; BHIMJI W; BOWERMAN DA; DAUNCEY PD; EGEDE U; ESCHRICH I; GAILLARD JR; MORTON GW; NASH JA; SANDERS P; TAYLOR GP; GRENIER GJ; LEE SJ; MALLIK U; COCHRAN J; CRAWLEY HB; LAMSA J; MEYER WT; PRELL S; ROSENBERG EI; YI J; DAVIER M; GROSDIDIER G; HOCKER A; LAPLACE S; LE DIBERDER F; LEPELTIER V; LUTZ AM; PETERSEN TC; PLASZCZYNSKI S; SCHUNE MH; TANTOT L; WORMSER G; BRIGLJEVIC V; CHENG CH; LANGE DJ; WRIGHT DM; BEVAN AJ; COLEMAN JP; FRY JR; GABATHULER E; GAMET R; KAY M; PARRY RJ; PAYNE DJ; SLOANE RJ; TOURAMANIS C; BACK JJ; HARRISON PF; SHORTHOUSE HW; STROTHER P; VIDAL PB; BROWN CL; COWAN G; FLACK RL; FLAECHER HU; GEORGE S; GREEN MG; KURUP A; MARKER CE; MCMAHON TR; RICCIARDI S; SALVATORE F; VAITSAS G; WINTER MA; BROWN D; DAVIS CL; ALLISON J; BARLOW RJ; FORTI AC; HART PA; HODGKINSON MC; JACKSON F; LAFFERTY GD; LYON AJ; WEATHERALL JH; WILLIAMS JC; FARBIN A; JAWAHERY A; KOVALSKYI D; LAE CK; LILLARD V; ROBERTS DA; BLAYLOCK G; DALLAPICCOLA C; FLOOD KT; HERTZBACH SS; KOFLER R; KOPTCHEV VB; MOORE TB; SAREMI S; STAENGLE H; WILLOCQ S; COWAN R; SCIOLLA G; TAYLOR F; YAMAMOTO RK; MANGEOL DJJ; PATEL PM; LAZZARO A; PALOMBO F; BAUER JM; CREMALDI L; ESCHENBURG V; GODANG R; KROEGER R; REIDY J; SANDERS DA; SUMMERS DJ; ZHAO HW; BRUNET S; COTE AHERN D; HAST C; TARAS P; NICHOLSON H; CARTARO C; CAVALLO N; DE NARDO G; FABOZZI F; GATTO C; LISTA L; PAOLUCCI P; PICCOLO D; SCIACCA C; BAAK MA; RAVEN G; LOSECCO JMIEL TA; BRAU B; GAN KK; HONSCHEID K; HUFNAGEL D; KAGAN H; KASS R; PULLIAM T; WONG QK; BRAU J; FREY R; POTTER CT; SINEV NB; STROM D; TORRENCE E; COLECCHIA F; DORIGO A; GALEAZZI F; MARGONI M; MORANDIN M; POSOCCO M; ROTONDO M; SIMONETTO F; STROILI R; TIOZZO G; VOCI C; BENAYOUN M; BRIAND H; CHAUVEAU J; DAVID P; DE LA VAISSIERE C; DEL BUONO L; HAMON O; JOHN MJJ; LERUSTE P; OCARIZ J; PIVK M; ROOS L; STARK J; T'JAMPENS S; THERIN G; MANFREDI PF; RE V; BEHERA PK; GLADNEY L; GUO QH; PANETTA J; ANGELINI C; BATIGNANI G; BETTARINI S; BONDIOLI M; BUCCI F; CALDERINI G; CARPINELLI M; DEL GAMBA V; FORTI F; GIORGI MA; LUSIANI A; MARCHIORI G; MARTINEZ VIDAL F; MORGANTI M; NERI N; PAOLONI E; RAMA M; RIZZO G; SANDRELLI F; WALSH J; HAIRE M; JUDD D; PAICK K; WAGONER DE; DANIELSON N; ELMER P; LU C; MIFTAKOV V; OLSEN J; SMITH AJS; TANAKA HA; VARNES EW; BELLINI F; CAVOTO G; FACCINI R; FERRAROTTO F; FERRONI F; GASPERO M; MAZZONI MA; MORGANTI S; PIERINI M; PIREDDA G; TEHRANI FS; VOENA C; CHRIST S; WAGNER G; WALDI R; ADYE T; DE GROOT N; FRANEK B; GEDDES NI; GOPAL GP; OLAIYA EO; XELLA SM; ALEKSAN R; EMERY S; GAIDOT A; GANZHUR SF; GIRAUD PF; DE MONCHENAULT GH; KOZANECKI W; LANGER M; LEGENDRE M; LONDON GW; MAYER B; SCHOTT G; VASSEUR G; YECHE C; ZITO M; PUROHIT MV; WEIDEMANN AW; YUMICEVA FX; ASTON D; BARTOLDUS R; BERGER N; BOYARSKI AM; BUCHMUELLER OL; CONVERY MR; COUPAL DP; DONG D; DORFAN J; DUJMIC D; DUNWOODIE W; FIELD RC; GLANZMAN T; GOWDY SJ; GRAUGES POUS E; HADIG T; HALYO V; HRYN'OVA T; INNES WR; JESSOP CP; KELSEY MH; KIM P; KOCIAN ML; LANGENEGGER U; LEITH DWGS; LUITZ S; LUTH V; LYNCH HL; MARSISKE H; MESSNER R; MULLER DR; O'GRADY CP; OZCAN VE; PERAZZO A; PERL M; PETRAK S; RATCLIFF BN; ROBERTSON SH; ROODMAN A; SALNIKOV AA; SCHINDLER RH; SCHWIENING J; SIMI G; SNYDER A; SOHA A; STELZER J; SU D; SULLIVAN MK; VA'VRA J; WAGNER SR; WEAVER M; WEINSTEIN AJR; WISNIEWSKI WJ; WRIGHT DH; YOUNG CC; BURCHAT PR; EDWARDS AJ; MEYER TI; PETERSEN BA; ROAT C; AHMED S; ALAM MS; ERNST JA; SALEEM M; WAPPLER FR; BUGG W; KRISHNAMURTHY M; SPANIER SM; ECKMANN R; KIM H; RITCHIE JL; SCHWITTERS RF; IZEN JM; KITAYAMA I; LOU XC; YE S; BIANCHI F; BONA M; GALLO F; GAMBA D; BOREAN C; BOSISIO L; DELLA RICCA G; DITTONGO S; GRANCAGNOLO S; LANCERI L; POROPAT P; VITALE L; VUAGNIN G; PANVINI RS; BANERJEE S; BROWN CM; FORTIN D; JACKSON PD; KOWALEWSKI R; RONEY JM; BAND HR; DASU S; DATTA M; EICHENBAUM AM; JOHNSON JR; KUTTER PE; LI H; LIU R; LODOVICO FD; MIHALYI A; MOHAPATRA AK; PAN Y; PREPOST R; SEKULA SJ; VON WIMMERSPERG TOELLER JH; WU J; WU SL; YU Z; NEAL H; CA BABAR COLLABORATION
Contributors:	Aubert, B; Barate, R; Boutigny, D; Gaillard, Jm; Hicheur, A; Karyotakis, Y; Lees, Jp; Robbe, P; Tisserand, V; Zghiche, A; Palano, A; Pompili, A; Chen, Jc; Qi, Nd; Rong, G; Wang, P; Zhu, Y; Eigen, G; Ofte, I; Stugu, B; Abrams, G; Borgland, Aw; Breon, Ab; Brown, Dn; BUTTON SHAFER, J; Cahn, Rn; Charles, E; Day, Ct; Gill, M; Gritsan, Av; Groysman, Y; Jacobsen, Rg; Kadel, Rw; Kadyk, J; Kerth, Lt; Kolomensky, Yg; Kral, Jf; Kukartsev, G; Leclerc, C; Levi, Me; Lynch, G; Mir, Lm; Oddone, Pj; Orimoto, Tj; Pripstein, M; Roe, Na; Romosan, A; Ronan, Mt; Shelkov, Vg; Telnov, Av; Wenzel, Wa; Ford, K; Harrison, Tj; Hawkes, Cm; Knowles, Dj; Morgan, Se; Penny, Rc; Watson, At; Watson, Nk; Goetzen, K; Held, T; Koch, H; Lewandowski, B; Pelizaeus, M; Peters, K; Schmuecker, H; Steinke, M; Barlow, Nr; Boyd, Jt; Chevalier, N; Cottingham, Wn; Kelly, Mp; Latham, Te; Mackay, C; Wilson, Ff; Abe, K; CUHADAR DONSZELMANN, T; Hearty, C; Mattison, T; Mckenna, Ja; Thiessen, D; Kyberd, P; Mckemey, Ak; Blinov, Ve; Bukin, Ad; Golubev, Vb; Ivanchenko, Vn; Kravchenko, Ea; Onuchin, Ap; Serednyakov, Si; Skovpen, Yi; Solodov, Ep; Yushkov, An; Best, D; Bruinsma, M; Chao, M; Kirkby, D; Lankford, Aj; Mandelkern, M; Mommsen, Rk
Publication Year:	2003
Collection:	Università degli Studi di Ferrara: CINECA IRIS
Description:	We present evidence for the flavor-changing neutral current decay B-->K-.(+).(-) and a measurement of the branching fraction for the related process B-->K.(+).(-), where .(+).(-) is either an e(+)e(-) or a mu(+)mu(-) pair. These decays are highly suppressed in the standard model, and they are sensitive to contributions from new particles in the intermediate state. The data sample comprises 123x10(6) Y(4S)-->B (B) over bar decays collected with the BABAR detector at the SLAC PEP-II e(+)e(-) storage ring. Averaging over K-() isospin and lepton flavor, we obtain the branching fractions B(B-->Kl(+)l(-))=(0.65(-0.13)(+0.14)+/-0.04)x10(-6) and B(B-->K()l(+)l(-))=(0.88(-0.29)(+0.33)+/-0.10)x10(-6), where the uncertainties are statistical and systematic, respectively. The significance of the B-->Kl(+)l(-) signal is over 8sigma, while for B-->K()l(+)l(-) it is 3.3sigma.
Document Type:	article in journal/newspaper
File Description:	STAMPA
Language:	English
Relation:	info:eu-repo/semantics/altIdentifier/wos/WOS:000186801900007; volume:91; issue:22; firstpage:221802-1; lastpage:221802-7; numberofpages:7; journal:PHYSICAL REVIEW LETTERS; https://hdl.handle.net/11392/1211549; https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.91.221802
DOI:	10.1103/PhysRevLett.91.221802
Availability:	https://hdl.handle.net/11392/1211549; https://doi.org/10.1103/PhysRevLett.91.221802; https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.91.221802; https://arxiv.org/pdf/hep-ex/0308042.pdf
Rights:	info:eu-repo/semantics/openAccess ; license:NON PUBBLICO - Accesso privato/ristretto ; license:Creative commons ; license uri:http://creativecommons.org/licenses/by/4.0/
Accession Number:	edsbas.5F8A5F27
Database:	BASE