Measurement of the CP asymmetry amplitude sin2 beta with B-0 mesons

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doi:10.1103/PhysRevLett.89.201802

We present results on time-dependent CP asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 88x10(6) Y(4S)-->B (B) over bar decays collected between 1999 and 2002 with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We study events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B-0 or (B) over bar (0) from its decay products. The amplitude of the CP asymmetry, which in the standard model is proportional to sin2beta, is derived from the decay-time distributions in such events. We measure sin2beta=0.741+/-0.067(stat)+/-0.034(syst) and \lambda\=0.948+/-0.051(stat)+/-0.030(syst). The magnitude of lambda is consistent with unity, in agreement with the standard model expectation of no direct CP violation in these modes.

Titolo:	Measurement of the CP asymmetry amplitude sin2 beta with B-0 mesons
Autori:	Aubert B 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 Gill MS Gritsan AV Groysman Y Jacobsen RG Kadel RW Kadyk J Kerth LT Kolomensky YG Kral JF 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 Harrison TJ Hawkes CM Knowles DJ O'Neale SW Penny RC Watson AT Watson NK Deppermann T Goetzen K Koch H Lewandowski B Peters K Schmuecker H Steinke M Barlow NR Bhimji W Boyd JT Chevalier N Clark PJ Cottingham WN Mackay C Wilson FF Abe K Hearty C Mattison TS McKenna JA Thiessen D Jolly S McKemey AK Blinov VE Bukin AD Buzykaev AR Golubev VB Ivanchenko VN Korol AA Kravchenko EA Onuchin AP Serednyakov SI Skovpen YI Yushkov AN Best D Chao M Kirkby D Lankford AJ Mandelkern M McMahon S Stoker DP Buchanan C Chun S Hadavand HK Hill EJ MacFarlane DB Paar H Prell S Rahatlou S Raven G Schwanke U Sharma V Berryhill JW 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 Porter FC Ryd A Samuel A Yang S Jayatilleke S Mancinelli G Meadows BT Sokoloff MD Barillari T Bloom P Ford WT Nauenberg U Olivas A Rankin P Roy J Smith JG van Hoek WC Zhang L Harton JL Hu T Krishnamurthy M Soffer A Toki WH Wilson RJ Zhang J Altenburg D 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 Sarti A Treadwell E Anulli F Baldini Ferroli R Calcaterra A de Sangro R Falciai D Finocchiaro G Patteri P Peruzzi IM Piccolo M Zallo A Bagnasco S Buzzo A Contri R Crosetti G Lo Vetere M Macri M Monge MR Passaggio S Pastore FC Patrignani C Robutti E Santroni A Tosi S Bailey S Morii M Bartoldus R Grenier GJ Mallik U Cochran J Crawley HB Lamsa J Meyer WT Rosenberg EI Yi J Davier M Grosdidier G Hocker A Lacker HM Laplace S Le Diberder F Lepeltier V Lutz AM Petersen TC Plaszczynski S Schune MH Tantot L Trincaz Duvoid S Wormser G Bionta RM Brigljevic V Lange DJ 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 Morton GW Nash JA Sanders P Smith D Taylor GP Back JJ Bellodi G Dixon P Harrison PF Potter RJL Shorthouse HW Strother P Vidal PB Cowan G 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 Jackson F Lafferty GD Lyon AJ Savvas N Weatherall JH Williams JC Farbin A Jawahery A Lillard V 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 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 LoSecco JM Alsmiller JRG Gabriel TA Brau J Frey R Iwasaki M 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 Voci C Benayoun M Briand H Chauveau J David P de la Vaissiere C Del Buono L Hamon O Leruste P Ocariz J Pivk M Roos L Stark J Manfredi PF Re V Speziali V Gladney L Guo QH Panetta J Angelini C Batignani G Bettarini S Bondioli M Bucci F Calderini G Campagna E Carpinelli M Forti F Giorgi MA LUSIANI, Alberto 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 Danielson N Elmer P Lu C Miftakov V Olsen J Schaffner SF Smith AJS Tumanov A Varnes EW Bellini F Cavoto G del Re D Faccini R Ferrarotto F Ferroni F Leonardi E Mazzoni MA Morganti S Piredda G Tehrani FS Serra M Voena C Christ S Wagner G Waldi R Adye T De Groot N Franek B Geddes NI Gopal GP Xella SM Aleksan R Emery S Gaidot A Giraud PF de Monchenault GH Kozanecki W Langer M London GW Mayer B Schott G Serfass B Vasseur G Yeche C Zito M Purohit MV Weidemann AW Yumiceva FX Adam I Aston D Berger N Boyarski AM Convery MR Coupal DP Dong D Dorfan J Dunwoodie W Field RC Glanzman T Gowdy SJ Grauges E Haas T Hadig 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 Simi G Snyder A Soha A Spanier SM Stelzer J Su D Sullivan MK Tanaka HA Va'vra J Wagner SR Weaver M 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 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 Hu H Johnson JR Liu R Di Lodovico F Mohapatra A Pan Y Prepost R Scott IJ Sekula SJ von Wimmersperg Toeller JH Wu J Wu SL Yu Z Neal H. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2002
Rivista:	PHYSICAL REVIEW LETTERS
Digital Object Identifier (DOI):	http://dx.doi.org/10.1103/PhysRevLett.89.201802
Handle:	http://hdl.handle.net/11384/4832
Appare nelle tipologie:	1.1 Articolo in rivista

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