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Measurement of the $B^{0}$ meson properties using partially reconstructed $B^{0} \to D^{*-}\pi^{+}$ and $B^{0} \to D^{*-}l^{+}\nu$ decay with the BABAR detector

B. Aubert 1 A. Boucham 1 D. Boutigny 1 I. de Bonis 1 J. Favier 1 J.M. Gaillard 1 F. Galeazzi 1 A. Jeremie 1 Y. Karyotakis 1 J.P. Lees 1 P. Robbe 1 V. Tisserand 1 K. Zachariadou 1 A. Palano G.P. Chen J.C. Chen N.D. Qi G. Rong P. Wang Y.S. Zhu G. Eigen P.L. Reinertsen B. Stugu B. Abbott G.S. Abrams A.W. Borgland A.B. Breon D.N. Brown J. Button-Shafer R.N. Cahn A.R. Clark Q. Fan M.S. Gill S.J. Gowdy Y. Groysman R.G. Jacobsen R.W. Kadel J. Kadyk L.T. Kerth S. Kluth J.F. Kral Céline Leclerc M.E. Levi T. Liu G. Lynch A.B. Meyer M. Momayezi P.J. Oddone A. Perazzo M. Pripstein N.A. Roe A. Romosan M.T. Ronan V.G. Shelkov P. Strother A.V. Telnov W.A. Wenzel P.G. Bright-Thomas T.J. Champion C.M. Hawkes A. Kirk S.W. O'Neale A.T. Watson N.K. Watson T. Deppermann H. Koch J. Krug M. Kunze B. Lewandowski K. Peters H. Schmuecker M. Steinke J.C. Andress N. Chevalier P.J. Clark N. Cottingham N. de Groot N. Dyce B. Foster A. Mass D. Wallom F.F. Wislon K. Abe C. Hearty T.S. Mattison J.A. Mckenna D. Thiessen B. Camanzi A.K. Mckemey J. Tinslay V.E. Blinov A.D. Bukin D.A. Bukin A.R. Buzykaev M.S. Dubrovin V.B. Golubev V.N. Ivanchenko A.A. Korol E.A. Kravchenko A.P. Onuchin A.A. Salnikov S.I. Serednyakov Y.I. Skovpen A.N. Yushkov A.J. Lankford M. Mandelkern D.P. Stoker A. Ahsan K. Arisaka C. Buchanan S. Chun J.G. Branson R. Faccini D.B. Macfarlane S. Rahatlou G. Raven V. Sharma C. Campagnari B. Dahmes P.A. Hart N. Kuznetsova S.L. Levy O. Long A. Lu J.D. Richman W. Verkerke M. Witherell S. Yellin J. Beringer D.E. Dorfan A. Eisner A. Frey A.A. Grillo M. Grothe C.A. Heusch R.P. Johnson W. Kroeger W.S. Lockman T. Pulliam H. Sadrozinski T. Schalk R.E. Schmitz B.A. Schumm A. Seiden M. Turri D.C. Williams E. Chen G.P. Dubois-Felsmann A. Dvoretskii D.G. Hitlin Y.G. Kolomensky S. Metzler J. Oyang F.C. Porter A. Ryd A. Samuel M. Weaver S. Yang R.Y. Zhu R. Aleksan G. de Domenico A. de Lesquen S. Emery A. Gaidot S.F. Ganzhur G. Hamel de Monchenault W. Kozanecki M. Langer G.W. London B. Mayer B. Serfass G. Vasseur C. Yeche M. Zito S. Devmal T.L. Geld S. Jayatilleke S.M. Jayatilleke G. Mancinelli B.T. Meadows M.D. Sokoloff J. Blouw M. Krishnamurthy A. Soffer W.H. Toki R.J. Wilson J. Zhang S. Fahey F. Gaede U. Nauenberg A. Olivas H. Park P. Rankin J. Roy S. Sen D.L. Wagner T. Brandt J. Brose G. Dahlinger M. Dickopp R.S. Dubitzky M.L. Kocian R. Muller-Pfefferkorn K.R. Schubert R. Schwierz B. Spaan L. Wilden L. Behr 2 D. Bernard 2 G.R. Bonneaud 2 F. Brochard 2 J. Cohen-Tanugi 2 S. Ferrag 2 E. Roussot 2 C. Thiebaux 2 G. Vasileiadis 2 M. Verderi 2 A. Anjomshoaa R. Bernet F. Di Lodovico F. Muheim S. Playfer J.E. Swain C. Bozzi S. Dittongo M. Folegani L. Piemontese E. Treadwell R. Baldini-Ferroli A. Calcaterra R. de Sangro D. Falciai G. Finocchiaro P. Patteri I.M. Peruzzi M. Piccolo A. Zallo S. Bagnasco A. Buzzo R. Contri G. Crosetti P. Fabbricatore S. Farinon M. Lo Vetere M. Macri M.R. Monge R. Musenich R. Parodi S. Passaggio F.C. Pastore C. Patrignani M.G. Pia C. Priano E. Robutti A. Santroni J. Cochran H.B. Crawley P.A. Fischer J. Lamsa W.T. Meyer E.I. Rosenberg R. Bartoldus T. Dignan R. Hamilton U. Mallik C. Angelini G. Batignani S. Bettarini M. Bondioli M. Carpinelli F. Forti M.A. Giorgi A. Lusiani M. Morganti E. Paoloni M. Rama G. Rizzo F. Sandrelli G. Simi G. Triggiani M. Benkebil 3 G. Grosdidier 3 C. Hast 3 A. Hoecker 3 V. Lepeltier 3 A.M. Lutz 3 Stéphane Plaszczynski 3 M.H. Schune 3 S. Trincaz-Duvoid 3 A. Valassi 3 G. Wormser 3 R.M. Bionta V. Brigljevic O. Fackler D. Fujino M. Mugge X. Shi T.J. Wenaus D.M. Wright C.R. Wuest M. Carroll J.R. Fry E. Gabathuler R. Gamet M. George M. Kay S. Mcmahon T.R. Mcmahon D.J. Payne C. Touramanis M.L. Aspinwall P.D. Dauncey I. Eschrich N.J.W. Gunawardane Roland Martin P. Sanders D. Smith D.E. Azzopardi J.J. Back P. Dixon P.F. Harrison P.B. Vidal M.I. Williams G. Cowan M.G. Green A. Kurup P. Mcgrath I. Scott D. Brown C.L. Davis Y. Li J. Pavlovich A. Trunov J. Allison R.J. Barlow J. Fullwood A. Khan G.D. Lafferty N. Savvas E.T. Simopoulos R.J. Thompson J.H. Weatherall C. Dallapiccola A. Farbin A. Jawahery V. Lillard J. Olsen D.A. Roberts B. Brau R. Cowan F. Taylor R.K. Yamamoto G. Blaylock K.T. Flood S.S. Hertzbach R. Kofler C.S. Lin S. Willocq J. Wittlin P. Bloom D.I. Britton M. Milek P.M. Patel J. Trischuk F. Lanni F. Palombo J.M. Bauer M. Booke L. Cremaldi R. Kroeger J. Reidy D. Sanders D.J. Summers J.F. Arguin J.-P. Martin J.Y. Nief R. Seitz P. Taras A. Woch V. Zacek H. Nicholson C.S. Sutton N. Cavallo G. de Nardo F. Fabozzi C. Gatto L. Lista D. Piccolo C. Sciacca M. Falbo J.M. Losecco T. Handler F. Colecchia F. Dal Corso G. Michelon M. Morandin M. Posocco R. Stroili E. Torassa C. Voci M. Benayoun 4 H. Briand 4 J. Chauveau 4 P. David 4 C. de la Vaissiere 4 L. del Buono 4 O. Hamon 4 F. Le Diberder 4 P. Leruste 4 J. Lory 4 F. Martinez-Vidal 4 L. Roos 4 J. Stark 4 S. Versille P.F. Manfredi V. Re V. Speziali E.D. Frank L. Gladney Q.H. Guo J.H. Panetta M. Haire D. Judd K. Paick L. Turnbull D.E. Wagoner J. Albert C. Bula M.H. Kelsey C. Lu K.T. Mcdonald V. Miftakov S.F. Schaffner A.J.S. Smith A. Tumanov E.W. Varnes G. Cavoto F. Ferrarotto F. Ferroni K. Fratini E. Lamanna Emilio Leonardi M.A. Mazzoni S. Morganti G. Piredda F. Safai Tehrani M. Serra R. Waldi P.F. Jacques M. Kalelkar R.J. Plano T. Adye U. Egede B. Franek G.P. Gopal N. Copty M.V. Purohit F.X. Yumiceva I. Adam P.L. Anthony F. Anulli D. Aston K. Baird E. Bloom A.M. Boyarski F. Bulos G. Calderini M.R. Convery D.P. Coupal D.H. Coward J. Dorfan M. Doser W. Dunwoodie T. Glanzman G.L. Godfrey P. Grosso J.L. Hewett T. Himel M.E. Huffer W.R. Innes C.P. Jessop P. Kim U. Langenegger D.W.G.S. Leith S. Luitz V. Luth H.L. Lynch G. Manzin H. Marsiske S. Menke R. Messner K.C. Moffeit M. Morii R. Mount D.R. Muller C.P. O'Grady P. Paolucci S. Petrak H. Quinn B.N. Ratcliff S.H. Robertson L.S. Rochester A. Roodman T. Schietinger R.H. Schindler J. Schwiening G. Sciolla V.V. Serbo A. Snyder A. Soha S.M. Spanier A. Stahl D. Su M.K. Sullivan M. Talby H.A. Tanaka J. Vavra S.R. Wagner A.J.R. Weinstein W.J. Wisniewski C.C. Young P.R. Burchat C.H. Cheng D. Kirkby T.I. Meyer C. Roat A. de Silva R. Henderson W. Bugg H. Cohn E. Hart A.W. Weidemann T. Benninger J.M. Izen I. Kitayama X.C. Lou M. Turcotte F. Bianchi M. Bona B. Di Girolamo D. Gamba A. Smol D. Zanin L. Bosisio G. Della Ricca L. Lanceri A. Pompili P. Poropat M. Prest E. Vallazza G. Vaugnin R.S. Panvini C.M. Brown P.D. Jackson R. Kowalewski J.M. Roney H.R. Band E. Charles S. Dasu P. Elmer J.R. Johnson J. Nielsen W. Orejudos Y. Pan R. Prepost J. Walsh Z. Yu H. Zobernig
Abstract : The two B^0 decay processes B^0 --> D^{*-}pi^+ and B^0 --> D^{*-}l^+nu have been studied by means of a partial reconstruction technique using a data sample collected with the BABAR detector at the PEP-II storage ring. To increase statistics, only the soft pi^- from the decay D^{*-} --> pi^-D^0 was used in association with either an oppositely-charged high-momentum pion or lepton. Events were then identified by exploiting the constraints from the simple kinematics of Y(4S) decays. A clear signature is obtained in each case. The position of the B^0 decay point was obtained from the reconstructed pi^+(l^+)pi^- vertex. The position of the other anti-B^0 in the event was also determined. Taking advantage of the boost given to the Y(4S) system by the asymmetric beam energies of PEP-II, the lifetime of the B^0 meson has been measured from the separation distance between the two vertices along the beam direction. The preliminary results are tau_B0 = 1.55+/-0.05+/-0.07 ps, tau_B0 = 1.62+/-0.02+/-0.09 ps, respectively for the B^0 --> D^{*-}pi^+ and B^0 --> D^{*-}l^+nu channels.
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Submitted on : Tuesday, September 19, 2000 - 4:48:02 PM
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B. Aubert, A. Boucham, D. Boutigny, I. de Bonis, J. Favier, et al.. Measurement of the $B^{0}$ meson properties using partially reconstructed $B^{0} \to D^{*-}\pi^{+}$ and $B^{0} \to D^{*-}l^{+}\nu$ decay with the BABAR detector. International Conference on High-Energy Physics 30 ICHEP 2000, Jul 2000, Osaka, Japan. pp.1-20. ⟨in2p3-00006098⟩

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