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 / J.P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, D.N. Brown, L.T. Kerth, Y.G. Kolomensky, M.J. Lee, G. Lynch, H. Koch, T. Schroeder, C. Hearty, T.S. Mattison, J.A. Mckenna, R.Y. So, A. Khan, V.E. Blinov, A.R. Buzykaev, V.P. Druzhinin, V.B. Golubev, E.A. Kravchenko, A.P. Onuchin, S.I. Serednyakov, Y.I. Skovpen, E.P. Solodov, K.Y. Todyshev, A.J. Lankford, M. Mandelkern, B. Dey, J.W. Gary, O. Long, C. Campagnari, M. Franco Sevilla, T.M. Hong, D. Kovalskyi, J.D. Richman, C.A. West, A.M. Eisner, W.S. Lockman, W. Panduro Vazquez, B.A. Schumm, A. Seiden, D.S. Chao, C.H. Cheng, B. Echenard, K.T. Flood, D.G. Hitlin, T.S. Miyashita, P. Ongmongkolkul, F.C. Porter, M. Rohrken, R. Andreassen, Z. Huard, B.T. Meadows, B.G. Pushpawela, M.D. Sokoloff, L. Sun, P.C. Bloom, W.T. Ford, A. Gaz, J.G. Smith, S.R. Wagner, R. Ayad, W.H. Toki, B. Spaan, D. Bernard, M. Verderi, S. Playfer, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, L. Piemontese, V. Santoro, A. Calcaterra, R. De Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I.M. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, M. Lo Vetere, M.R. Monge, S. Passaggio, C. Patrignani, E. Robutti, B. Bhuyan, V. Prasad, A. Adametz, U. Uwer, H.M. Lacker, P.D. Dauncey, U. Mallik, C. Chen, J. Cochran, S. Prell, H. Ahmed, A.V. Gritsan, N. Arnaud, M. Davier, D. Derkach, G. Grosdidier, F. Le Diberder, A.M. Lutz, B. Malaescu, P. Roudeau, A. Stocchi, G. Wormser, D.J. Lange, D.M. Wright, J.P. Coleman, J.R. Fry, E. Gabathuler, D.E. Hutchcroft, D.J. Payne, C. Touramanis, A.J. Bevan, F. Di Lodovico, R. Sacco, G. Cowan, J. Bougher, D.N. Brown, C.L. Davis, A.G. Denig, M. Fritsch, W. Gradl, K. Griessinger, A. Hafner, K.R. Schubert, R.J. Barlow, G.D. Lafferty, R. Cenci, B. Hamilton, A. Jawahery, D.A. Roberts, R. Cowan, G. Sciolla, R. Cheaib, P.M. Patel, S.H. Robertson, N. Neri, F. Palombo, L. Cremaldi, R. Godang, P. Sonnek, D.J. Summers, M. Simard, P. Taras, G. De Nardo, G. Onorato, C. Sciacca, M. Martinelli, G. Raven, C.P. Jessop, J.M. Losecco, K. Honscheid, R. Kass, E. Feltresi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, G. Simi, F. Simonetto, R. Stroili, S. Akar, E. Ben-Haim, M. Bomben, G.R. Bonneaud, H. Briand, G. Calderini, J. Chauveau, P. Leruste, G. Marchiori, J. Ocariz, M. Biasini, E. Manoni, S. Pacetti, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, M. Chrzaszcz, F. Forti, M.A. Giorgi, A. Lusiani, B. Oberhof, E. Paoloni, A. Perez, G. Rizzo, J.J. Walsh, D. Lopes Pegna, J. Olsen, A.J.S. Smith, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, A. Pilloni, G. Piredda, C. Bunger, S. Dittrich, O. Grunberg, M. Hess, T. Leddig, C. Voss, R. Waldi, T. Adye, E.O. Olaiya, F.F. Wilson, S. Emery, G. Vasseur, F. Anulli, D. Aston, D.J. Bard, C. Cartaro, M.R. Convery, J. Dorfan, G.P. Dubois-Felsmann, W. Dunwoodie, M. Ebert, R.C. Field, B.G. Fulsom, M.T. Graham, C. Hast, W.R. Innes, P. Kim, D.W.G.S. Leith, P. Lewis, D. Lindemann, S. Luitz, V. Luth, H.L. Lynch, D.B. Macfarlane, D.R. Muller, H. Neal, M. Perl, T. Pulliam, B.N. Ratcliff, A. Roodman, A.A. Salnikov, R.H. Schindler, A. Snyder, D. Su, M.K. Sullivan, J. Va'Vra, W.J. Wisniewski, H.W. Wulsin, M.V. Purohit, R.M. White, J.R. Wilson, A. Randle-Conde, S.J. Sekula, M. Bellis, P.R. Burchat, E.M.T. Puccio, M.S. Alam, J.A. Ernst, R. Gorodeisky, N. Guttman, D.R. Peimer, A. Soffer, S.M. Spanier, J.L. Ritchie, A.M. Ruland, R.F. Schwitters, B.C. Wray, J.M. Izen, X.C. Lou, F. Bianchi, F. De Mori, A. Filippi, D. Gamba, L. Lanceri, L. Vitale, F. Martinez-Vidal, A. Oyanguren, P. Villanueva-Perez, J. Albert, S. Banerjee, A. Beaulieu, F.U. Bernlochner, H.H.F. Choi, G.J. King, R. Kowalewski, M.J. Lewczuk, T. Lueck, I.M. Nugent, J.M. Roney, R.J. Sobie, N. Tasneem, T.J. Gershon, P.F. Harrison, T.E. Latham, H.R. Band, S. Dasu, Y. Pan, R. Prepost, S.L. Wu. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 91:5(2015 Mar 31), pp. 052022.1-052022.30. [10.1103/PhysRevD.91.052022]
Measurement of the D⁰ →π⁻e⁺νₑ differential decay branching fraction as a function of q₂ and study of form factor parametrizations
N. Neri;F. Palombo;F. Simonetto;
2015
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|.
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