Observation of a significant excess of $\pi^{0}\pi^{0}$ events in B meson decays - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review Letters Year : 2003

Observation of a significant excess of $\pi^{0}\pi^{0}$ events in B meson decays

B. Aubert (1) , R. Barate (1) , D. Boutigny (1) , J.M. Gaillard (1) , A. Hicheur (1) , Y. Karyotakis (1) , J.P. Lees (1) , P. Robbe (1) , V. Tisserand (1) , A. Zghiche (1) , A. Palano , A. Pompili , J.C. Chen , N.D. Qi , G. Rong , P. Wang , Y.S. Zhu , G. Eigen , I. Ofte , B. Stugu , G.S. Abrams , A.W. Borgland , A.B. Breon , D.N. Brown , J. Button-Shafer , R.N. Cahn , E. Charles , M.S. Gill , A.V. Gritsan , Y. Groysman , R.G. Jacobsen , R.W. Kadel , J. Kadyk , L.T. Kerth , Yu.G. Kolomensky , J.F. Kral , Céline Leclerc , G. Lynch , L.M. Mir , P.J. Oddone , T.J. Orimoto , M. Pripstein , N.A. Roe , A. Romosan , M.T. Ronan , V.G. Shelkov , A.V. Telnov , W.A. Wenzel , T.J. Harrison , C.M. Hawkes , D.J. Knowles , S.W. O'Neale , R.C. Penny , A.T. Watson , N.K. Watson , T. Deppermann , K. Goetzen , H. Koch , B. Lewandowski , K. Peters , H. Schmuecker , M. Steinke , N.R. Barlow , W. Bhimji , J.T. Boyd , N. Chevalier , P.J. Clark , W.N. Cottingham , C. Mackay , F.F. Wilson , K. Abe , C. Hearty , T.S. Mattison , J.A. Mckenna , D. Thiessen , S. Jolly , A.K. Mckemey , V.E. Blinov , A.D. Bukin , A.R. Buzykaev , V.B. Golubev , V.N. Ivanchenko , A.A. Korol , E.A. Kravchenko , A.P. Onuchin , S.I. Serednyakov , Yu.I. Skovpen , A.N. Yushkov , D. Best , M. Chao , D. Kirkby , A.J. Lankford , M. Mandelkern , S. Mcmahon , D.P. Stoker , C. Buchanan , S. Chun , H.K. Hadavand , E.J. Hill , D.B. Macfarlane , H. Paar , S. Prell , S. Rahatlou , G. Raven , V. Sharma , J.W. Berryhill , C. Campagnari , B. Dahmes , P.A. Hart , N. Kuznetsova , S.L. Levy , O. Long , M.A. Mazur , J.D. Richman , W. Verkerke , J. Beringer , A.M. Eisner , M. Grothe , C.A. Heusch , W.S. Lockman , T. Pulliam , T. Schalk , R.E. Schmitz , B.A. Schumm , A. Seiden , M. Turri , W. Walkowiak , D.C. Williams , M.G. Wilson , E. Chen , G.P. Dubois-Felsmann , A. Dvoretskii , D.G. Hitlin , F.C. Porter , A. Ryd , A. Samuel , S. L. Yang , S. Jayatilleke , G. Mancinelli , B.T. Meadows , M.D. Sokoloff , T. Barillari , P. Bloom , W.T. Ford , U. Nauenberg , A. Olivas , P. Rankin , J. Roy , J.G. Smith , W.C. van Hoek , L. Zhang , J.L. Harton , T. Hu , M. Krishnamurthy , A. Soffer , W.H. Toki , R.J. Wilson , J. Zhang , D. Altenburg , T. Brandt , J. Brose , T. Colberg , M. Dickopp , R.S. Dubitzky , A. Hauke , E. Maly , R. Muller-Pfefferkorn , S. Otto , K.R. Schubert , R. Schwierz , B. Spaan , L. Wilden , D. Bernard , G.R. Bonneaud , F. Brochard , J. Cohen-Tanugi , P. Grenier , C. Thiebaux , G. Vasileiadis , M. Verderi , A. Anjomshoaa , R. Bernet , A. Khan , D. Lavin , F. Muheim , S. Playfer , J.E. Swain , J. Tinslay , M. Falbo , C. Borean , C. Bozzi , L. Piemontese , A. Sarti , E. Treadwell , F. Anulli , 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 , M. Lo Vetere , M. Macri , M.R. Monge , F.C. Pastore , C. Patrignani , E. Robutti , A. Santroni , S. Tosi , S. Bailey , M. Morii , R. Bartoldus , G.J. Grenier , U. Mallik , J. Cochran , H.B. Crawley , J. Lamsa , W.T. Meyer , E.I. Rosenberg , J. Yi , M. Davier (2) , G. Grosdidier (2) , A. Hocker (2) , S. Laplace (2) , F. Le Diberder (2) , V. Lepeltier (2) , A.M. Lutz (2) , T.C. Petersen (2) , Stéphane Plaszczynski (2) , M.H. Schune (2) , L. Tantot (2) , G. Wormser (2) , R.M. Bionta , V. Brigljevic , D.J. Lange , K. van Bibber , D.M. Wright , A.J. Bevan , J.R. Fry , E. Gabathuler , R. Gamet , M. George , M. Kay , D.J. Payne , R.J. Sloane , C. Touramanis , M.L. Aspinwall , D.A. Bowerman , P.D. Dauncey , U. Egede , I. Eschrich , G.W. Morton , J.A. Nash , P. Sanders , D. Smith , G.P. Taylor , J.J. Back , G. Bellodi , P. Dixon , P.F. Harrison , R.J.L. Potter , H.W. Shorthouse , P. Strother , P.B. Vidal , G. Cowan , H.U. Flaecher , S. George , M.G. Green , A. Kurup , C.E. Marker , T.R. Mcmahon , S. Ricciardi , F. Salvatore , G. Vaitsas , M.A. Winter , D. Brown , C.L. Davis , J. Allison , R.J. Barlow , A.C. Forti , F. Jackson , G.D. Lafferty , A.J. Lyon , N. Savvas , J.H. Weatherall , J.C. Williams , A. Farbin , A. Jawahery , V. Lillard , D.A. Roberts , J.R. Schieck , G. Blaylock , C. Dallapiccola , K.T. Flood , S.S. Hertzbach , R. Kofler , V.B. Koptchev , T.B. Moore , H. Staengle , S. Willocq , B. Brau , R. Cowan , G. Sciolla , F. Taylor , R.K. Yamamoto , M. Milek , P.M. Patel , F. Palombo , J.M. Bauer , L. Cremaldi , V. Eschenburg , R. Kroeger , J. Reidy , D.A. Sanders , D.J. Summers , C. Hast , P. Taras , H. Nicholson , N. Cavallo , G. de Nardo , F. Fabozzi , C. Gatto , L. Lista , P. Paolucci , D. Piccolo , C. Sciacca , J.M. Losecco , J.R.G. Alsmiller , T.A. Gabriel , J. Brau , R. Frey , M. Iwasaki , C.T. Potter , N.B. Sinev , D. Strom , E. Torrence , F. Colecchia , A. Dorigo , F. Galeazzi , M. Margoni , M. Morandin , M. Posocco , M. Rotondo , F. Simonetto , R. Stroili , C. Voci , M. Benayoun , H. Briand , J. Chauveau , P. David , C. de La Vaissiere , L. del Buono , O. Hamon , M.J.J. John , P. Leruste , J. Ocariz , M. Pivk , L. Roos , J. Stark , S. t'Jampens , G. Therin , P.F. Manfredi , V. Re , V. Speziali , L. Gladney , Q.H. Guo , J. Panetta , C. Angelini , G. Batignani , S. Bettarini , M. Bondioli , F. Bucci , G. Calderini , E. Campagna , M. Carpinelli , F. Forti , M.A. Giorgi , A. Lusiani , G. Marchiori , F. Martinez-Vidal , M. Morganti , N. Neri , E. Paoloni , M. Rama , G. Rizzo , F. Sandrelli , G. Triggiani , J. Walsh , M. Haire , D. Judd , K. Paick , L. Turnbull , D.E. Wagoner , J. Albert , N. Danielson , P. Elmer , C. Lu , V. Miftakov , J. Olsen , S.F. Schaffner , A.J.S. Smith , A. Tumanov , E.W. Varnes , F. Bellini , G. Cavoto , D. del Re , R. Faccini , F. Ferrarotto , F. Ferroni , Emilio Leonardi , S. Morganti , G. Piredda , F. Safai Tehrani , M. Serra , C. Voena , S. Christ , G. B. Wagner , R. Waldi , T. Adye , N. de Groot , B. Franek , N.I. Geddes , G.P. Gopal , S.M. Xella , R. Aleksan , S. Emery , A. Gaidot , P.F. Giraud S.F. Ganzhur , G. Hamel de Monchenault , W. Kozanecki , M. Langer , M. Legendre , G.W. London , B. Mayer , G. Schott , G. Vasseur , C. Yeche , M. Zito , M.V. Purohit , A.W. Weidemann , F.X. Yumiceva , I. Adam , D. Aston , N. Berger , A.M. Boyarski , M.R. Convery , D.P. Coupal , D. Dong , J. Dorfan , W. Dunwoodie , R.C. Field , T. Glanzman , S.J. Gowdy , E. Grauges , T. Haas , T. Hadig , V. Halyo , T. Himel , T. Hrynova , M.E. Huffer , W.R. Innes , C.P. Jessop , M.H. Kelsey , P. Kim , M.L. Kocian , U. Langenegger , D.W.G.S. Leith , S. Luitz , V. Luth , H.L. Lynch , H. Marsiske , S. Menke , R. Messner , D.R. Muller , C.P. O'Grady , V.E. Ozcan , A. Perazzo , M. Perl , S. Petrak , H. Quinn , B.N. Ratcliff , S.H. Robertson , A. Roodman , A.A. Salnikov , T. Schietinger , R.H. Schindler , J. Schwiening , G. Simi , A. Snyder , A. Soha , S.M. Spanier , J. Stelzer , D. Su , M.K. Sullivan , H.A. Tanaka , J. Vavra , S.R. Wagner , M. Weaver , A.J.R. Weinstein , W.J. Wisniewski , D.H. Wright , C.C. Young , P.R. Burchat , C.H. Cheng , T.I. Meyer , C. Roat , R. Henderson , W. Bugg , H. Cohn , J.M. Izen , I. Kitayama , X.C. Lou , F. Bianchi , M. Bona , D. Gamb , L. Bosisio , G. Della Ricca , S. Dittongo , L. Lanceri , P. Poropat , L. Vitale , G. Vuagnin , R.S. Panvini , S. Banerjee , C.M. Brown , D. Fortin , P.D. Jackson , R. Kowalewski , J.M. Roney , H.R. Band , S. Dasu , M. Datta , A.M. Eichenbaum , H. Hu , J.R. Johnson , R. Liu , F. Di Lodovico , A. Mohapatra , Y. Pan , R. Prepost , I.J. Scott , S.J. Sekula , J.H. von Wimmersperg-Toeller , J. Wu , S.L. Wu , Z. Yu , H. Neal
A. Palano
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A. Pompili
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J.C. Chen
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N.D. Qi
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G. Rong
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P. Wang
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Y.S. Zhu
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G. Eigen
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I. Ofte
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B. Stugu
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G.S. Abrams
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A.W. Borgland
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A.B. Breon
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D.N. Brown
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J. Button-Shafer
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R.N. Cahn
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E. Charles
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M.S. Gill
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A.V. Gritsan
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Y. Groysman
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R.G. Jacobsen
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R.W. Kadel
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J. Kadyk
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L.T. Kerth
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Yu.G. Kolomensky
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J.F. Kral
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Céline Leclerc
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G. Lynch
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L.M. Mir
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P.J. Oddone
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T.J. Orimoto
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M. Pripstein
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N.A. Roe
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A. Romosan
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M.T. Ronan
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V.G. Shelkov
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A.V. Telnov
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W.A. Wenzel
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T.J. Harrison
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C.M. Hawkes
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D.J. Knowles
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S.W. O'Neale
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R.C. Penny
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A.T. Watson
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N.K. Watson
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T. Deppermann
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K. Goetzen
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H. Koch
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B. Lewandowski
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K. Peters
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H. Schmuecker
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M. Steinke
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N.R. Barlow
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W. Bhimji
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J.T. Boyd
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N. Chevalier
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P.J. Clark
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W.N. Cottingham
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C. Mackay
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F.F. Wilson
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K. Abe
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C. Hearty
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T.S. Mattison
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J.A. Mckenna
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D. Thiessen
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S. Jolly
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A.K. Mckemey
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V.E. Blinov
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A.D. Bukin
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A.R. Buzykaev
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V.B. Golubev
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V.N. Ivanchenko
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A.A. Korol
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E.A. Kravchenko
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A.P. Onuchin
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S.I. Serednyakov
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Yu.I. Skovpen
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A.N. Yushkov
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D. Best
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M. Chao
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D. Kirkby
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A.J. Lankford
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M. Mandelkern
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S. Mcmahon
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D.P. Stoker
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C. Buchanan
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S. Chun
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H.K. Hadavand
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E.J. Hill
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D.B. Macfarlane
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H. Paar
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S. Prell
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S. Rahatlou
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G. Raven
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V. Sharma
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J.W. Berryhill
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C. Campagnari
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B. Dahmes
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P.A. Hart
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N. Kuznetsova
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S.L. Levy
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O. Long
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M.A. Mazur
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J.D. Richman
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W. Verkerke
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J. Beringer
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C.A. Heusch
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W.S. Lockman
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T. Pulliam
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T. Schalk
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R.E. Schmitz
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B.A. Schumm
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A. Seiden
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M. Turri
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W. Walkowiak
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D.C. Williams
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M.G. Wilson
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E. Chen
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G.P. Dubois-Felsmann
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A. Dvoretskii
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D.G. Hitlin
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F.C. Porter
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A. Ryd
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A. Samuel
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S. L. Yang
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S. Jayatilleke
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G. Mancinelli
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B.T. Meadows
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M.D. Sokoloff
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T. Barillari
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P. Bloom
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W.T. Ford
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U. Nauenberg
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A. Olivas
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P. Rankin
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J. Roy
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J.G. Smith
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W.C. van Hoek
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L. Zhang
J.L. Harton
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T. Hu
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M. Krishnamurthy
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A. Soffer
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W.H. Toki
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D. Altenburg
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R.S. Dubitzky
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A. Hauke
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E. Maly
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R. Muller-Pfefferkorn
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S. Otto
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K.R. Schubert
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R. Schwierz
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B. Spaan
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L. Wilden
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D. Bernard
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P. Grenier
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A. Kurup
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C.E. Marker
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T.R. Mcmahon
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S. Ricciardi
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F. Salvatore
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G. Vaitsas
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M.A. Winter
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D. Brown
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C.L. Davis
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G.D. Lafferty
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N. Savvas
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J.H. Weatherall
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J.C. Williams
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A. Farbin
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A. Jawahery
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V. Lillard
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D.A. Roberts
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J.R. Schieck
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G. Blaylock
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C. Dallapiccola
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K.T. Flood
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S.S. Hertzbach
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R. Kofler
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V.B. Koptchev
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T.B. Moore
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H. Staengle
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S. Willocq
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B. Brau
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R. Cowan
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G. Sciolla
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F. Taylor
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R.K. Yamamoto
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M. Milek
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P.M. Patel
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F. Palombo
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J.M. Bauer
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L. Cremaldi
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V. Eschenburg
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R. Kroeger
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J. Reidy
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D.A. Sanders
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D.J. Summers
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C. Hast
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P. Taras
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H. Nicholson
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N. Cavallo
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G. de Nardo
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F. Fabozzi
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C. Gatto
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L. Lista
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P. Paolucci
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D. Piccolo
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C. Sciacca
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J.M. Losecco
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J.R.G. Alsmiller
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T.A. Gabriel
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J. Brau
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R. Frey
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M. Iwasaki
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C.T. Potter
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N.B. Sinev
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D. Strom
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E. Torrence
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F. Colecchia
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A. Dorigo
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F. Galeazzi
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M. Margoni
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M. Morandin
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M. Posocco
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M. Rotondo
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F. Simonetto
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Abstract

We present an observation of the decay $B^{0} \to \pi^{0} \pi^{0}$ based on a sample of 124 million $B\bar{B}$ pairs recorded by the BABAR detector at the PEP-II asymmetric-energy $B$ Factory at SLAC. We observe $46 \pm 13 \pm 3$ events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction $\BR(B^{0} \to \pi^{0} \pi^{0}) = (2.1 \pm 0.6 \pm 0.3) \times 10^{-6}$, averaged over $B^{0}$ and $\bar{B}^{0}$ decays.
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Dates and versions

in2p3-00020250 , version 1 (16-01-2004)

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  • HAL Id : in2p3-00020250 , version 1

Cite

B. Aubert, R. Barate, D. Boutigny, J.M. Gaillard, A. Hicheur, et al.. Observation of a significant excess of $\pi^{0}\pi^{0}$ events in B meson decays. Physical Review Letters, 2003, 91, pp.241801-1-7. ⟨in2p3-00020250⟩
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