Based on a sample of 500 million e+e-→cc¯ events recorded by the BABAR detector at c.m. energies of close to 10.6 GeV, we report on a study of the decay D0→π-e+νe. We measure the ratio of branching fractions, RD=B(D0→π-e+νe)/B(D0→K-π+)=0.0713±0.0017stat±0.0024syst, and use the present world average for B(D0→K-π+) to obtain B(D0→π-e+νe)=(2.770±0.068stat±0.092syst±0.037ext)×10-3 where the third error accounts for the uncertainty on the branching fraction for the reference channel. The measured dependence of the differential branching fraction on q2, the four-momentum transfer squared between the D and the π meson, is compared to various theoretical predictions for the hadronic form factor, f+,Dπ(q2), and the normalization |Vcd|×f+,Dπ(q2=0)=0.1374±0.0038stat±0.0022syst±0.0009ext. is extracted from a fit to data. Using the most recent LQCD prediction of f+,Dπ(q2=0)=0.666±0.029, we obtain |Vcd|=0.206±0.007exp±0.009LQCD. Assuming, instead, |Vcd|=|Vus|=0.2252±0.0009, we obtain f+,Dπ(q2=0)=0.610±0.020exp±0.005ext. The q2 dependence of f+,Dπ(q2) is compared to a variety of multipole parametrizations. This information is applied to B0→π-e+νe decays and, combined with an earlier B0→π-e+νe measurement by BABAR, is used to derive estimates of |Vub|.

Measurement of the D0 →π-e+νe differential decay branching fraction as a function of q2 and study of form factor parametrizations

ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;CASAROSA, GIULIA;FORTI, FRANCESCO;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2015-01-01

Abstract

Based on a sample of 500 million e+e-→cc¯ events recorded by the BABAR detector at c.m. energies of close to 10.6 GeV, we report on a study of the decay D0→π-e+νe. We measure the ratio of branching fractions, RD=B(D0→π-e+νe)/B(D0→K-π+)=0.0713±0.0017stat±0.0024syst, and use the present world average for B(D0→K-π+) to obtain B(D0→π-e+νe)=(2.770±0.068stat±0.092syst±0.037ext)×10-3 where the third error accounts for the uncertainty on the branching fraction for the reference channel. The measured dependence of the differential branching fraction on q2, the four-momentum transfer squared between the D and the π meson, is compared to various theoretical predictions for the hadronic form factor, f+,Dπ(q2), and the normalization |Vcd|×f+,Dπ(q2=0)=0.1374±0.0038stat±0.0022syst±0.0009ext. is extracted from a fit to data. Using the most recent LQCD prediction of f+,Dπ(q2=0)=0.666±0.029, we obtain |Vcd|=0.206±0.007exp±0.009LQCD. Assuming, instead, |Vcd|=|Vus|=0.2252±0.0009, we obtain f+,Dπ(q2=0)=0.610±0.020exp±0.005ext. The q2 dependence of f+,Dπ(q2) is compared to a variety of multipole parametrizations. This information is applied to B0→π-e+νe decays and, combined with an earlier B0→π-e+νe measurement by BABAR, is used to derive estimates of |Vub|.
2015
By:lees, Jp; Poireau, V; Tisserand, V; Grauges, E; Palano, A; Eigen, G; Stugu, B; Brown, Dn; Kerth, Lt; Kolomensky, Yg; 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, Yi; Solodov, Ep; Todyshev, Ky; Lankford, Aj; Mandelkern, M; Dey, B; Gary, Jw; Long, O; Campagnari, C; Sevilla, Mf; Hong, Tm; Kovalskyi, D; Richman, Jd; West, Ca; Eisner, Am; Lockman, Ws; Vazquez, Wp; Schumm, Ba; Seiden, A; Chao, Ds; Cheng, Ch; Echenard, B; Flood, Kt; Hitlin, Dg; Miyashita, Ts; Ongmongkolkul, P; Porter, Fc; Rohrken, M; Andreassen, R; Huard, Z; Meadows, Bt; Pushpawela, Bg; Sokoloff, Md; Sun, L; Bloom, Pc; Ford, Wt; Gaz, A; 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; Piemontese, L; Santoro, V; Calcaterra, A; De Sangro, R; Finocchiaro, G; Martellotti, S; Patteri, P; Peruzzi, Im; Piccolo, M; Rama, M; Zallo, A; Contri, R; Lo Vetere, M; Monge, Mr; Passaggio, S; Patrignani, C; Robutti, E; Bhuyan, B; Prasad, V; Adametz, A; Uwer, U; Lacker, Hm; Dauncey, Pd; 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; Bougher, J; 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; Sciolla, G; Cheaib, R; Patel, Pm; Robertson, Sh; Neri, N; Palombo, F; Cremaldi, L; Godang, R; Sonnek, P; Summers, Dj; Simard, M; Taras, P; De Nardo, G; Onorato, G; Sciacca, C; Martinelli, M; Raven, G; Jessop, Cp; Losecco, Jm; Honscheid, K; Kass, R; Feltresi, E; 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, P; Marchiori, G; Ocariz, J; Biasini, M; Manoni, E; Pacetti, S; Rossi, A; Angelini, Carlo; Batignani, Giovanni; Bettarini, Stefano; Carpinelli, M; Casarosa, Giulia; Cervelli, A; Chrzaszcz, M; Forti, Francesco; Giorgi, Ma; Lusiani, A; Oberhof, B; Paoloni, Eugenio; Perez, A; Rizzo, Giuliana; Walsh, Jj; Pegna, Dl; Olsen, J; Smith, Ajs; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Gioi, Ll; Pilloni, A; Piredda, G; Bunger, C; Dittrich, S; Grunberg, O; Hess, M; Leddig, T; Voss, C; Waldi, R; Adye, T; Olaiya, Eo; Wilson, Ff; Emery, S; Vasseur, G; Anulli, F; 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; Lewis, P; Lindemann, D; Luitz, S; Luth, V; Lynch, Hl; Macfarlane, Db; Muller, Dr; Neal, H; Perl, M; Pulliam, T; Ratcliff, Bn; Roodman, A; Salnikov, Aa; Schindler, Rh; Snyder, A; Su, D; Sullivan, Mk; Va'Vra, J; Wisniewski, Wj; Wulsin, Hw; Purohit, Mv; White, Rm; 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; Ruland, Am; Schwitters, Rf; Wray, Bc; Izen, Jm; Lou, Xc; Bianchi, F; De Mori, F; Filippi, A; Gamba, D; Lanceri, L; Vitale, L; Martinez Vidal, F; Oyanguren, A; Villanueva Perez, P; Albert, J; Banerjee, S; Beaulieu, A; Bernlochner, Fu; King, Hhfcgj; 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[ 89 ] . . . Less
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