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Measurement of the D0 → π −e +νe differential decay branching fraction as a function of q 2 and study of form factor parameterizations

Author(s): Lees, JP; Poireau, V; Tisserand, V; Grauges, E; Palano, A; et al

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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, fπ+,D(q2), and the normalization |Vcd|×fπ+,D(q2=0)=0.1374±0.0038stat.±0.0022syst.±0.0009ext. is extracted from a fit to data. Using the most recent LQCD prediction of fπ+,D(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 fπ+,D(q2=0)=0.610±0.020exp.±0.005ext.. The q2 dependence of fπ+,D(q2) is compared to a variety of multi-pole parameterizations. 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|.
Publication Date: Mar-2015
Electronic Publication Date: 31-Mar-2015
Citation: 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, Mandelkern, M, Dey, B, Gary, JW, Long, O, Campagnari, C, 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, Miyashita, TS, Ongmongkolkul, P, Porter, FC, Röhrken, 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, Ph, Marchiori, G, Ocariz, J, Biasini, M, Manoni, E, Pacetti, S, Rossi, A, Angelini, C, Batignani, G, Bettarini, S, Carpinelli, M, Casarosa, G, Cervelli, A, Chrzaszcz, M, Forti, F, Giorgi, MA, Lusiani, A, Oberhof, B, Paoloni, E, Perez, A, Rizzo, G, Walsh, JJ, Lopes Pegna, D, Olsen, J, Smith, AJS, Faccini, R, Ferrarotto, F, Ferroni, F, Gaspero, M, Li Gioi, L, 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, 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, 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. (2015). Measurement of the D0 → π −e +νe differential decay branching fraction as a function of q 2 and study of form factor parameterizations. Physical Review D, 91 (5), 10.1103/PhysRevD.91.052022
DOI: doi:10.1103/PhysRevD.91.052022
ISSN: 1550-7998
EISSN: 1550-2368
Pages: 1 - 28
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review D
Version: Author's manuscript



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