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Study of time-dependent CP-violating asymmetries and flavor oscillations in neutral B decays at the Υ(4S)

Title:	Study of time-dependent CP-violating asymmetries and flavor oscillations in neutral B decays at the Υ(4S)
Authors:	AUBERT B; BOUTIGNY D; GAILLARD JM; HICHEUR A; KARYOTAKIS Y; LEES JP; ROBBE P; TISSERAND V; PALANO A; POMPILI A; CHEN GP; CHEN JC; QI ND; RONG G; WANG P; ZHU YS; EIGEN G; STUGU B; ABRAMS GS; BORGLAND AW; BREON AB; BROWN DN; BUTTON SHAFER J; CAHN RN; CLARK AR; GILL MS; GRITSAN AV; GROYSMAN Y; JACOBSEN RG; KADEL RW; KADYK J; KERTH LT; KOLOMENSKY YG; KRAL JF; LECLERC C; LEVI ME; LYNCH G; ODDONE PJ; PRIPSTEIN M; ROE NA; ROMOSAN A; RONAN MT; SHELKOV VG; TELNOV AV; WENZEL WA; HARRISON TJ; HAWKES CM; KNOWLES DJ; O'NEALE SW; PENNY RC; WATSON AT; WATSON NK; DEPPERMANN T; GOETZEN K; KOCH H; KUNZE M; LEWANDOWSKI B; PETERS K; SCHMUECKER H; STEINKE M; BARLOW NR; BHIMJI W; CHEVALIER N; CLARK PJ; COTTINGHAM WN; FOSTER B; MACKAY C; WILSON FF; ABE K; HEARTY C; MATTISON TS; MCKENNA JA; THIESSEN D; JOLLY S; MCKEMEY AK; BLINOV VE; BUKIN AD; BUKIN DA; BUZYKAEV AR; GOLUBEV VB; IVANCHENKO VN; KOROL AA; KRAVCHENKO EA; ONUCHIN AP; SEREDNYAKOV SI; SKOVPEN YI; TELNOV VI; YUSHKOV AN; BEST D; CHAO M; KIRKBY D; LANKFORD AJ; MANDELKERN M; MCMAHON S; STOKER DP; ARISAKA K; BUCHANAN C; CHUN S; MACFARLANE DB; PRELL S; RAHATLOU S; RAVEN G; SHARMA V; CAMPAGNARI C; DAHMES B; HART PA; KUZNETSOVA N; LEVY SL; LONG O; LU A; MAZUR MA; RICHMAN JD; VERKERKE W; BERINGER J; EISNER AM; GROTHE M; HEUSCH CA; LOCKMAN WS; PULLIAM T; SCHALK T; SCHMITZ RE; SCHUMM BA; SEIDEN A; TURRI M; WALKOWIAK W; WILLIAMS DC; WILSON MG; CHEN E; DUBOIS FELSMANN GP; DVORETSKII A; HITLIN DG; METZLER S; OYANG J; PORTER FC; RYD A; SAMUEL A; WEAVER M; YANG S; ZHU RY; DEVMAL S; GELD TL; JAYATILLEKE S; MANCINELLI G; MEADOWS BT; SOKOLOFF MD; BARILLARI T; BLOOM P; DIMA MO; FORD WT; NAUENBERG U; OLIVAS A; RANKIN P; ROY J; SMITH JG; VAN HOEK WC; BLOUW J; HARTON JL; KRISHNAMURTHY M; SOFFER A; TOKI WH; WILSON RJ; ZHANG J; BRANDT T; BROSE J; COLBERG T; DICKOPP M; DUBITZKY RS; HAUKE A; MALY E; MULLER PFEFFERKORN R; OTTO S; SCHUBERT KR; SCHWIERZ R; SPAAN B; WILDEN L; BERNARD D; BONNEAUD GR; BROCHARD F; COHEN TANUGI J; FERRAG S; T'JAMPENS S; THIEBAUX C; VASILEIADIS G; VERDERI M; ANJOMSHOAA A; BERNET R; KHAN A; LAVIN D; MUHEIM F; PLAYFER S; SWAIN JE; TINSLAY J; FALBO M; BOREAN C; BOZZI C; PIEMONTESE L; TREADWELL E; ANULLI F; BALDINI FERROLI R; CALCATERRA A; DE SANGRO R; FALCIAI D; FINOCCHIARO G; PATTERI P; PERUZZI IM; PICCOLO M; XIE Y; ZALLO A; BAGNASCO S; BUZZO A; CONTRI R; CROSETTI G; LO VETERE M; MACRI M; MONGE MR; PASSAGGIO S; PASTORE FC; PATRIGNANI C; PIA MG; ROBUTTI E; SANTRONI A; TOSI S; MORII M; BARTOLDUS R; HAMILTON R; MALLIK U; COCHRAN J; CRAWLEY HB; FISCHER PA; LAMSA J; MEYER WT; ROSENBERG EI; GROSDIDIER G; HAST C; HOCKER A; LACKER HM; LAPLACE S; LEPELTIER V; LUTZ AM; PLASZCZYNSKI S; SCHUNE MH; TRINCAZ DUVOID S; WORMSER G; BIONTA RM; BRIGLJEVIC V; LANGE DJ; MUGGE M; VAN BIBBER K; WRIGHT DM; BEVAN AJ; FRY JR; GABATHULER E; GAMET R; GEORGE M; KAY M; PAYNE DJ; SLOANE RJ; TOURAMANIS C; ASPINWALL ML; BOWERMAN DA; DAUNCEY PD; EGEDE U; ESCHRICH I; GUNAWARDANE NJW; NASH JA; SANDERS P; SMITH D; AZZOPARDI DE; BACK JJ; BELLODI G; DIXON P; HARRISON PF; POTTER RJL; SHORTHOUSE HW; STROTHER P; VIDAL PB; COWAN G; GEORGE S; GREEN MG; KURUP A; MARKER CE; MCGRATH P; MCMAHON TR; RICCIARDI S; SALVATORE F; VAITSAS G; BROWN D; DAVIS CL; ALLISON J; BARLOW RJ; BOYD JT; FORTI AC; FULLWOOD J; JACKSON F; LAFFERTY GD; SAVVAS N; WEATHERALL JH; WILLIAMS JC; FARBIN A; JAWAHERY A; LILLARD V; OLSEN J; ROBERTS DA; SCHIECK JR; BLAYLOCK G; DALLAPICCOLA C; FLOOD KT; HERTZBACH SS; KOFLER R; KOPTCHEV VB; MOORE TB; STAENGLE H; WILLOCQ S; BRAU B; COWAN R; SCIOLLA G; TAYLOR F; YAMAMOTO RK; MILEK M; PATEL PM; PALOMBO F; BAUER JM; CREMALDI L; ESCHENBURG V; KROEGER R; REIDY J; SANDERS DA; SUMMERS DJ; NIEF JY; TARAS P; NICHOLSON H; CARTARO C; CAVALLO N; DE NARDO G; FABOZZI F; GATTO C; LISTA L; PAOLUCCI P; PICCOLO D; SCIACCA C; LOSECCO JM; ALSMILLER JRG; GABRIEL TA; BRAU J; FREY R; GRAUGES E; IWASAKI M; SINEV NB; STROM D; COLECCHIA F; DAL CORSO F; DORIGO A; GALEAZZI F; MICHELON G; MORANDIN M; POSOCCO M; ROTONDO M; TORASSA E; VOCI C; BENAYOUN M; BRIAND H; CHAUVEAU J; DAVID P; DE LA VAISSIERE C; DEL BUONO L; HAMON O; LE DIBERDER F; LERUSTE P; OCARIZ J; ROOS L; STARK J; MANFREDI PF; RE V; SPEZIALI V; FRANK ED; GLADNEY L; GUO QH; PANETTA J; ANGELINI C; BATIGNANI G; BETTARINI S; BONDIOLI M; BUCCI F; CAMPAGNA E; CARPINELLI M; FORTI F; GIORGI MA; LUSIANI A; MARCHIORI G; MARTINEZ VIDAL F; MORGANTI M; NERI N; PAOLONI E; RAMA M; RIZZO G; SANDRELLI F; TRIGGIANI G; WALSH J; HAIRE M; JUDD D; PAICK K; TURNBULL L; WAGONER DE; ALBERT J; ELMER P; LU C; MIFTAKOV V; SCHAFFNER SF; SMITH AJS; TUMANOV A; VARNES EW; CAVOTO G; DEL RE D; FERRAROTTO F; FERRONI F; LAMANNA E; MAZZONI MA; MORGANTI S; PIREDDA G; TEHRANI FS; SERRA M; VOENA C; FACCINI R; CHRIST S; WALDI R; ADYE T; DE GROOT N; FRANEK B; GEDDES NI; GOPAL GP; XELLA SM; ALEKSAN R; EMERY S; GAIDOT A; GANZHUR SF; GIRAUD PF; DE MONCHENAULT GH; KOZANECKI W; LANGER M; LONDON GW; MAYER B; SERFASS B; VASSEUR G; YECHE C; ZITO M; PUROHIT MV; SINGH H; WEIDEMANN AW; YUMICEVA FX; ADAM I; ASTON D; BERGER N; BOYARSKI AM; CALDERINI G; CONVERY MR; COUPAL DP; DONG D; DORFAN J; DUNWOODIE W; FIELD RC; GLANZMAN T; GOWDY SJ; HAAS T; HALYO V; HIMEL T; HRYN'OVA T; HUFFER ME; INNES WR; JESSOP CP; KELSEY MH; KIM P; KOCIAN ML; LANGENEGGER U; LEITH DWGS; LUITZ S; LUTH V; LYNCH HL; MARSISKE H; MENKE S; MESSNER R; MULLER DR; O'GRADY CP; OZCAN VE; PERAZZO A; PERL M; PETRAK S; QUINN H; RATCLIFF BN; ROBERTSON SH; ROODMAN A; SALNIKOV AA; SCHIETINGER T; SCHINDLER RH; SCHWIENING J; SNYDER A; SOHA A; SPANIER SM; STELZER J; SU D; SULLIVAN MK; TANAKA HA; VA'VRA J; WAGNER SR; WEINSTEIN AJR; WISNIEWSKI WJ; WRIGHT DH; YOUNG CC; BURCHAT PR; CHENG CH; MEYER TI; ROAT C; HENDERSON R; BUGG W; COHN H; IZEN JM; KITAYAMA I; LOU XC; BIANCHI F; BONA M; GAMBA D; BOSISIO L; DELLA RICCA G; DITTONGO S; LANCERI L; POROPAT P; VUAGNIN G; PANVINI RS; BROWN CM; JACKSON PD; KOWALEWSKI R; RONEY JM; BAND HR; CHARLES E; DASU S; EICHENBAUM AM; HU H; JOHNSON JR; LIU R; DI LODOVICO F; PAN Y; PREPOST R; SCOTT IJ; SEKULA SJ; VON WIMMERSPERG TOELLER JH; WU SL; YU Z; KORDICH TMB; NEAL H; CA BABAR COLLABORATION; MARGONI, MARTINO; SIMONETTO, FRANCO; STROILI, ROBERTO; SIMI, GABRIELE
Contributors:	Aubert, B; Boutigny, D; Gaillard, Jm; Hicheur, A; Karyotakis, Y; Lees, Jp; Robbe, P; Tisserand, V; Palano, A; Pompili, A; Chen, Gp; Chen, Jc; Qi, Nd; Rong, G; Wang, P; Zhu, Y; Eigen, G; Stugu, B; Abrams, G; Borgland, Aw; Breon, Ab; Brown, Dn; BUTTON SHAFER, J; Cahn, Rn; Clark, Ar; Gill, M; Gritsan, Av; Groysman, Y; Jacobsen, Rg; Kadel, Rw; Kadyk, J; Kerth, Lt; Kolomensky, Yg; Kral, Jf; Leclerc, C; Levi, Me; Lynch, G; Oddone, Pj; Pripstein, M; Roe, Na; Romosan, A; Ronan, Mt; Shelkov, Vg; Telnov, Av; Wenzel, Wa; Harrison, Tj; Hawkes, Cm; Knowles, Dj; O'Neale, Sw; Penny, Rc; Watson, At; Watson, Nk; Deppermann, T; Goetzen, K; Koch, H; Kunze, M; Lewandowski, B; Peters, K; Schmuecker, H; Steinke, M; Barlow, Nr; Bhimji, W; Chevalier, N; Clark, Pj; Cottingham, Wn; Foster, B; Mackay, C; Wilson, Ff; Abe, K; Hearty, C; Mattison, T; Mckenna, Ja; Thiessen, D; Jolly, S; Mckemey, Ak; Blinov, Ve; Bukin, Ad; Bukin, Da; Buzykaev, Ar; Golubev, Vb; Ivanchenko, Vn; Korol, Aa; Kravchenko, Ea; Onuchin, Ap; Serednyakov, Si; Skovpen, Yi; Telnov, Vi; Yushkov, An; Best, D; Chao, M; Kirkby, D; Lankford, Aj; Mandelkern, M; Mcmahon, S; Stoker, Dp; Arisaka, K; Buchanan, C; Chun, S; Macfarlane, Db; Prell, S
Publication Year:	2002
Collection:	Padua Research Archive (IRIS - Università degli Studi di Padova)
Description:	We present a measurement of time-dependent CP-violating asymmetries in neutral B meson decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. The data sample consists of 29.7 fb-1 recorded at the Υ(4S) resonance and 3.9 fb-1 off resonance. One of the neutral B mesons, which are produced in pairs at the Υ(4S), is fully reconstructed in the CP decay modes J/ψKS0, ψ(2S)KS0, χc1KS0, J/ψK0 (K0→KS0π0) and J/ψKL0, or in flavor-eigenstate modes involving D()π/ρ/a1 and J/ψK0 (K*0→K+π-). The flavor of the other neutral B meson is tagged at the time of its decay, mainly with the charge of identified leptons and kaons. A neural network tagging algorithm is used to recover events without a clear lepton or kaon tag. The proper time elapsed between the decays is determined by measuring the distance between the decay vertices. Wrong-tag probabilities, the time-difference resolution function, and the B0-B0 oscillation frequency Δmd are measured with a sample of about 6350 fully-reconstructed B0 decays in hadronic flavor-eigenstate modes. A maximum-likelihood fit to this flavor eigenstate sample finds Δmd=0.516±0.016(stat)±0.010(syst)ps-1. The value of the asymmetry amplitude sin2β is determined from a simultaneous maximum-likelihood fit to the time-difference distribution of the flavor-eigenstate sample and about 642 tagged B0 decays in the CP-eigenstate modes. We find sin2β=0.59±0.14(stat)±0.05(syst), demonstrating that CP violation exists in the neutral B meson system. We also determine the value of the CP violation parameter \|λ\|=0.93±0.09(stat)±0.03(syst), which is consistent with the expectation of \|λ\|=1 for no direct CP violation.
Document Type:	article in journal/newspaper
Language:	English
Relation:	info:eu-repo/semantics/altIdentifier/wos/WOS:000177873600007; volume:66; numberofpages:54; journal:PHYSICAL REVIEW D; https://hdl.handle.net/11577/2464406
DOI:	10.1103/PhysRevD.66.032003
Availability:	https://hdl.handle.net/11577/2464406; https://doi.org/10.1103/PhysRevD.66.032003
Accession Number:	edsbas.D0BD9F03
Database:	BASE