- Main
Observation of B¯→D(*) π+π-ℓ-ν¯ Decays in e+e- Collisions at the Υ(4S) Resonance
- Lees, JP;
- Poireau, V;
- Tisserand, V;
- Grauges, E;
- Palano, A;
- Eigen, G;
- Stugu, B;
- Brown, DN;
- Kerth, LT;
- Kolomensky, Yu G;
- Lee, MJ;
- Lynch, G;
- Koch, H;
- Schroeder, T;
- Hearty, C;
- Mattison, TS;
- McKenna, JA;
- So, RY;
- Khan, A;
- Blinov, VE;
- Buzykaev, AR;
- Druzhinin, VP;
- Golubev, VB;
- Kravchenko, EA;
- Onuchin, AP;
- Serednyakov, SI;
- Skovpen, Yu I;
- Solodov, EP;
- Todyshev, K Yu;
- Lankford, AJ;
- Gary, JW;
- Long, O;
- Franco Sevilla, M;
- Hong, TM;
- Kovalskyi, D;
- Richman, JD;
- West, CA;
- Eisner, AM;
- Lockman, WS;
- Panduro Vazquez, W;
- Schumm, BA;
- Seiden, A;
- Chao, DS;
- Cheng, CH;
- Echenard, B;
- Flood, KT;
- Hitlin, DG;
- Kim, J;
- Miyashita, TS;
- Ongmongkolkul, P;
- Porter, FC;
- Röhrken, M;
- Andreassen, R;
- Huard, Z;
- Meadows, BT;
- Pushpawela, BG;
- Sokoloff, MD;
- Sun, L;
- Ford, WT;
- Smith, JG;
- Wagner, SR;
- Ayad, R;
- Toki, WH;
- Spaan, B;
- Bernard, D;
- Verderi, M;
- Playfer, S;
- Bettoni, D;
- Bozzi, C;
- Calabrese, R;
- Cibinetto, G;
- Fioravanti, E;
- Garzia, I;
- Luppi, E;
- Santoro, V;
- Calcaterra, A;
- de Sangro, R;
- Finocchiaro, G;
- Martellotti, S;
- Patteri, P;
- Peruzzi, IM;
- Piccolo, M;
- Zallo, A;
- Contri, R;
- Monge, MR;
- Passaggio, S;
- Patrignani, C;
- Bhuyan, B;
- Prasad, V;
- Adametz, A;
- Uwer, U;
- Lacker, HM;
- Mallik, U;
- Chen, C;
- Cochran, J;
- Prell, S;
- Ahmed, H;
- Gritsan, AV;
- Arnaud, N;
- Davier, M;
- Derkach, D;
- Grosdidier, G;
- Le Diberder, F;
- Lutz, AM;
- Malaescu, B;
- Roudeau, P;
- Stocchi, A;
- Wormser, G;
- Lange, DJ;
- Wright, DM;
- Coleman, JP;
- Fry, JR;
- Gabathuler, E;
- Hutchcroft, DE;
- Payne, DJ;
- Touramanis, C;
- Bevan, AJ;
- Di Lodovico, F;
- Sacco, R;
- Cowan, G;
- Brown, DN;
- Davis, CL;
- Denig, AG;
- Fritsch, M;
- Gradl, W;
- Griessinger, K;
- Hafner, A;
- Schubert, KR;
- Barlow, RJ;
- Lafferty, GD;
- Cenci, R;
- Hamilton, B;
- Jawahery, A;
- Roberts, DA;
- Cowan, R;
- Cheaib, R;
- Patel, PM;
- Robertson, SH;
- Dey, B;
- Neri, N;
- Palombo, F;
- Cremaldi, L;
- Godang, R;
- Summers, DJ;
- Simard, M;
- Taras, P;
- De Nardo, G;
- Onorato, G;
- Sciacca, C;
- Raven, G;
- Jessop, CP;
- LoSecco, JM;
- Honscheid, K;
- Kass, R;
- Margoni, M;
- Morandin, M;
- Posocco, M;
- Rotondo, M;
- Simi, G;
- Simonetto, F;
- Stroili, R;
- Akar, S;
- Ben-Haim, E;
- Bomben, M;
- Bonneaud, GR;
- Briand, H;
- Calderini, G;
- Chauveau, J;
- Leruste, Ph;
- Marchiori, G;
- Ocariz, J;
- Biasini, M;
- Manoni, E;
- Rossi, A;
- Angelini, C;
- Batignani, G;
- Bettarini, S;
- Carpinelli, M;
- Casarosa, G;
- Chrzaszcz, M;
- Forti, F;
- Giorgi, MA;
- Lusiani, A;
- Oberhof, B;
- Paoloni, E;
- Rama, M;
- Rizzo, G;
- Walsh, JJ;
- Lopes Pegna, D;
- Olsen, J;
- Smith, AJS;
- Anulli, F;
- Faccini, R;
- Ferrarotto, F;
- Ferroni, F;
- Gaspero, M;
- Pilloni, A;
- Piredda, G;
- Bünger, C;
- Dittrich, S;
- Grünberg, O;
- Hess, M;
- Leddig, T;
- Voß, C;
- Waldi, R;
- Adye, T;
- Olaiya, EO;
- Wilson, FF;
- Emery, S;
- Vasseur, G;
- Aston, D;
- Bard, DJ;
- Cartaro, C;
- Convery, MR;
- Dorfan, J;
- Dubois-Felsmann, GP;
- Dunwoodie, W;
- Ebert, M;
- Field, RC;
- Fulsom, BG;
- Graham, MT;
- Hast, C;
- Innes, WR;
- Kim, P;
- Leith, DWGS;
- Luitz, S;
- Luth, V;
- MacFarlane, DB;
- Muller, DR;
- Neal, H;
- Pulliam, T;
- Ratcliff, BN;
- Roodman, A;
- Schindler, RH;
- Snyder, A;
- Su, D;
- Sullivan, MK;
- Va'vra, J;
- Wisniewski, WJ;
- Wulsin, HW;
- Purohit, MV;
- Wilson, JR;
- Randle-Conde, A;
- Sekula, SJ;
- Bellis, M;
- Burchat, PR;
- Puccio, EMT;
- Alam, MS;
- Ernst, JA;
- Gorodeisky, R;
- Guttman, N;
- Peimer, DR;
- Soffer, A;
- Spanier, SM;
- Ritchie, JL;
- Schwitters, RF;
- Izen, JM;
- Lou, XC;
- Bianchi, F;
- De Mori, F;
- Filippi, A;
- Gamba, D;
- Lanceri, L;
- Vitale, L;
- Martinez-Vidal, F;
- Oyanguren, A;
- Albert, J;
- Banerjee, Sw;
- Beaulieu, A;
- Bernlochner, FU;
- Choi, HHF;
- King, GJ;
- Kowalewski, R;
- Lewczuk, MJ;
- Lueck, T;
- Nugent, IM;
- Roney, JM;
- Sobie, RJ;
- Tasneem, N;
- Gershon, TJ;
- Harrison, PF;
- Latham, TE;
- Band, HR;
- Dasu, S;
- Pan, Y;
- Prepost, R;
- Wu, SL
- et al.
Abstract
We report on measurements of the decays of B¯ mesons into the semileptonic final states B¯→D^(*)π^(+)π^(-)ℓ^(-)ν¯, where D^(*) represents a D or D^(*) meson and ℓ^(-) is an electron or a muon. These measurements are based on 471×10^(6) BB ¯ pairs recorded with the BABAR detector at the SLAC asymmetric B factory PEP-II. We determine the branching fraction ratios R_{π^{+}π^{-}}^{(*)}=B(B[over ¯]→D^{(*)}π^{+}π^{-}ℓ^{-}ν[over ¯])/B(B[over ¯]→D^{(*)}ℓ^{-}ν[over ¯]) using events in which the second B meson is fully reconstructed. We find R_{π^{+}π^{-}}=0.067±0.010±0.008 and R_{π^{+}π^{-}}^{*}=0.019±0.005±0.004, where the first uncertainty is statistical and the second is systematic. Based on these results and assuming isospin invariance, we estimate that B[over ¯]→D^{(*)}ππℓ^{-}ν[over ¯] decays, where π denotes either a π^{±} and π^{0} meson, account for up to half the difference between the measured inclusive semileptonic branching fraction to charm hadrons and the corresponding sum of previously measured exclusive branching fractions.
Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.
Main Content
Enter the password to open this PDF file:
-
-
-
-
-
-
-
-
-
-
-
-
-
-