Search for B Mesogenesis at BABAR

J. P. Lees,V. Poireau,V. Tisserand,E. Grauges, A. Palano,G. Eigen,D. N. Brown, Yu. G. Kolomensky,M. Fritsch,H. Koch,R. Cheaib,C. Hearty,T. S. Mattison,J. A. McKenna,R. Y. So,V. E. Blinov,A. R. Buzykaev,V. P. Druzhinin,E. A. Kozyrev,E. A. Kravchenko,S. I. Serednyakov,Yu. I. Skovpen,E. P. Solodov,K. Yu. Todyshev,A. J. Lankford,B. Dey,J. W. Gary,O. Long,A. M. Eisner,W. S. Lockman,W. Panduro Vazquez,D. S. Chao,C. H. Cheng,B. Echenard, K. T. Flood,D. G. Hitlin,Y. Li,D. X. Lin,S. Middleton,T. S. Miyashita,P. Ongmongkolkul,J. Oyang,F. C. Porter,M. Roehrken,B. T. Meadows,M. D. Sokoloff,J. G. Smith, S. R. Wagner,D. Bernard,M. Verderi,D. Bettoni, C. Bozzi,R. Calabrese,G. Cibinetto,E. Fioravanti,I. Garzia,E. Luppi,V. Santoro,A. Calcaterra,R. de Sangro,G. Finocchiaro,S. Martellotti,P. Patteri,I. M. Peruzzi,M. Piccolo,M. Rotondo,A. Zallo,S. Passaggio, C. Patrignani,B. J. Shuve,H. M. Lacker,B. Bhuyan,U. Mallik,C. Chen,J. Cochran,S. Prell,A. V. Gritsan, N. Arnaud,M. Davier,F. Le Diberder,A. M. Lutz,G. Wormser,D. J. Lange,D. M. Wright,J. P. Coleman,D. E. Hutchcroft,D. J. Payne,C. Touramanis,A. J. Bevan,F. Di Lodovico,G. Cowan,Sw. Banerjee,C. L. Davis,A. G. Denig,W. Gradl, K. Griessinger,A. Hafner,K. R. Schubert,R. J. Barlow,G. D. Lafferty,R. Cenci,A. Jawahery,D. A. Roberts,R. Cowan,S. H. Robertson, R. M. Seddon,N. Neri,F. Palombo,L. Cremaldi,R. Godang,D. J. Summers,G. De Nardo, C. Sciacca,C. P. Jessop,J. M. LoSecco,K. Honscheid,A. Gaz,M. Margoni,G. Simi,F. Simonetto,R. Stroili,S. Akar,E. Ben-Haim,M. Bomben,G. R. Bonneaud, G. Calderini,J. Chauveau,G. Marchiori,J. Ocariz,M. Biasini,E. Manoni,A. Rossi,G. Batignani,S. Bettarini,M. Carpinelli,G. Casarosa,M. Chrzaszcz,F. Forti,M. A. Giorgi,A. Lusiani,B. Oberhof,E. Paoloni,M. Rama, G. Rizzo,J. J. Walsh,L. Zani,A. J. S. Smith,F. Anulli,R. Faccini,F. Ferrarotto,F. Ferroni,A. Pilloni, C. Bunger,S. Dittrich,O. Grunberg,T. Leddig,C. Voss,R. Waldi,T. Adye,F. F. Wilson,S. Emery,G. Vasseur,D. Aston,C. Cartaro,M. R. Convery,W. Dunwoodie,M. Ebert,R. C. Field,B. G. Fulsom,M. T. Graham,C. Hast, P. Kim,S. Luitz,D. B. MacFarlane,D. R. Muller,H. Neal,B. N. Ratcliff,A. Roodman,M. K. Sullivan,J. Va,W. J. Wisniewski,M. V. Purohit,J. R. Wilson, S. J. Sekula,H. Ahmed,N. Tasneem,M. Bellis, P. R. Burchat, E. M. T. Puccio,J. A. Ernst, R. Gorodeisky,N. Guttman,D. R. Peimer,A. Soffer,S. M. Spanier,J. L. Ritchie,J. M. Izen,X. C. Lou,F. Bianchi,F. De Mori,A. Filippi,L. Lanceri,L. Vitale,F. Martinez-Vidal,A. Oyanguren,J. Albert, A. Beaulieu,F. U. Bernlochner,G. J. King,R. Kowalewski,T. Lueck,C. Miller,I. M. Nugent,J. M. Roney,R. J. Sobie,T. J. Gershon,P. F. Harrison,T. E. Latham,S. L. Wu

PHYSICAL REVIEW D（2023）

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摘要

A new mechanism has been proposed to simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the Universe. This scenario predicts exotic B -meson decays into a baryon and a dark-sector antibaryon (psi D) with branching fractions accessible at B factories. We present a search for B -> ?psi D decays using data collected by the BABAR experiment at SLAC. This reaction is identified by fully reconstructing the accompanying B meson and requiring the presence of a single ? baryon in the remaining particles. No significant signal is observed, and bounds on the B -> ?psi D branching fraction are derived in the range 0.13-5.2 x 10-5 for 1.0 < m psi D < 4.2 GeV/c2. These results set strong constraints on the parameter space allowed by the theory.

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