학술논문

Measurement of the branching fraction of the decay $B^- \to D^0 \rho(770)^-$ at Belle II
Document Type
Working Paper
Author
Belle II CollaborationAdachi, I.Aggarwal, L.Aihara, H.Akopov, N.Aloisio, A.Ky, N. AnhAsner, D. M.Atmacan, H.Aushev, V.Aversano, M.Ayad, R.Babu, V.Bae, H.Bahinipati, S.Bambade, P.Banerjee, Sw.Bansal, S.Barrett, M.Baudot, J.Baur, A.Beaubien, A.Becherer, F.Becker, J.Bennett, J. V.Bertacchi, V.Bertemes, M.Bertholet, E.Bessner, M.Bettarini, S.Bianchi, F.Bilka, T.Biswas, D.Bobrov, A.Bodrov, D.Bolz, A.Bondar, A.Boschetti, A.Bozek, A.Bračko, M.Branchini, P.Briere, R. A.Browder, T. E.Budano, A.Bussino, S.Campajola, M.Cao, L.Casarosa, G.Cecchi, C.Cerasoli, J.Chang, M. -C.Cheema, P.Cheon, B. G.Chilikin, K.Chirapatpimol, K.Cho, H. -E.Cho, K.Cho, S. -J.Choi, S. -K.Choudhury, S.Corona, L.Cui, J. X.Dattola, F.De La Cruz-Burelo, E.De La Motte, S. A.de Marino, G.De Nardo, G.De Nuccio, M.De Pietro, G.de Sangro, R.Destefanis, M.Dey, S.Dhamija, R.Di Canto, A.Di Capua, F.Dingfelder, J.Doležal, Z.Jiménez, I. DomínguezDong, T. V.Dorigo, M.Dorner, D.Dort, K.Dossett, D.Dreyer, S.Dubey, S.Dugic, K.Dujany, G.Ecker, P.Eliachevitch, M.Feichtinger, P.Ferber, T.Fillinger, T.Finck, C.Finocchiaro, G.Fodor, A.Forti, F.Frey, A.Fulsom, B. G.Gabrielli, A.Ganiev, E.Garcia-Hernandez, M.Garg, R.Gaudino, G.Gaur, V.Gaz, A.Gellrich, A.Ghevondyan, G.Ghosh, D.Ghumaryan, H.Giakoustidis, G.Giordano, R.Giri, A.Glazov, A.Gobbo, B.Godang, R.Gogota, O.Goldenzweig, P.Gradl, W.Granderath, S.Graziani, E.Greenwald, D.Gruberová, Z.Gu, T.Gudkova, K.Halder, S.Han, Y.Hara, T.Hayasaka, K.Hayashii, H.Hazra, S.Hearty, C.Hedges, M. T.Heidelbach, A.de la Cruz, I. HerediaVillanueva, M. HernándezHiguchi, T.Hoek, M.Hohmann, M.Horak, P.Hsu, C. -L.Humair, T.Iijima, T.Inami, K.Ipsita, N.Ishikawa, A.Itoh, R.Iwasaki, M.Jacobs, W. W.Jaffe, D. E.Jang, E. -J.Jia, S.Jin, Y.Junkerkalefeld, H.Kalita, D.Kaliyar, A. B.Kandra, J.Kang, S.Karyan, G.Kawasaki, T.Keil, F.Kiesling, C.Kim, C. -H.Kim, D. Y.Kim, K. -H.Kim, Y. -K.Kindo, H.Kinoshita, K.Kodyš, P.Koga, T.Kohani, S.Kojima, K.Konno, T.Korobov, A.Korpar, S.Kovalenko, E.Kowalewski, R.Kraetzschmar, T. M. G.Križan, P.Krokovny, P.Kuhr, T.Kulii, Y.Kumar, J.Kumar, M.Kumar, R.Kumara, K.Kunigo, T.Kuzmin, A.Kwon, Y. -J.Lacaprara, S.Lalwani, K.Lam, T.Lanceri, L.Lange, J. S.Laurenza, M.Leboucher, R.Diberder, F. R. LeLee, M. J.Leo, P.Lemettais, C.Levit, D.Lewis, P. M.Li, L. K.Li, S. X.Li, Y.Li, Y. B.Libby, J.Liptak, Z.Liu, M. H.Liu, Q. Y.Liu, Z. Q.Liventsev, D.Longo, S.Lueck, T.Lyu, C.Ma, Y.Maggiora, M.Maiti, R.Maity, S.Mancinelli, G.Manfredi, R.Manoni, E.Mantovano, M.Marcantonio, D.Marcello, S.Marinas, C.Martellini, C.Martens, A.Martinov, T.Massaccesi, L.Masuda, M.Matsuoka, K.Matvienko, D.Maurya, S. K.Mawas, F.McKenna, J. A.Mehta, R.Meier, F.Merola, M.Miller, C.Mirra, M.Mitra, S.Mohanty, G. B.Mondal, S.Moneta, S.Moser, H. -G.Mrvar, M.Mussa, R.Nakamura, I.Nakao, M.Nakazawa, Y.Charan, A. NarimaniNaruki, M.Narwal, D.Natkaniec, Z.Natochii, A.Nayak, L.Nayak, M.Nazaryan, G.Neu, M.Niiyama, M.Nishida, S.Novosel, A.Ogawa, S.Onishchuk, Y.Ono, H.Pakhlova, G.Pardi, S.Parham, K.Park, H.Park, S. -H.Paschen, B.Passeri, A.Patra, S.Pedlar, T. K.Peschke, R.Pestotnik, R.Piccolo, M.Piilonen, L. E.Podesta-Lerma, P. L. M.Podobnik, T.Pokharel, S.Praz, C.Prell, S.Prencipe, E.Prim, M. T.Purwar, H.Raeuber, G.Raiz, S.Rauls, N.Reif, M.Reiter, S.Ripp-Baudot, I.Rizzo, G.Roehrken, M.Roney, J. M.Rostomyan, A.Rout, N.Sanders, D. A.Sandilya, S.Santelj, L.Sato, Y.Savinov, V.Scavino, B.Schnepf, M.Schwanda, C.Seino, Y.Selce, A.Senyo, K.Serrano, J.Sevior, M. E.Sfienti, C.Shan, W.Shen, C. P.Shi, X. D.Shillington, T.Shiu, J. -G.Shtol, D.Shwartz, B.Sibidanov, A.Simon, F.Singh, J. B.Skorupa, J.Sobie, R. J.Sobotzik, M.Soffer, A.Sokolov, A.Solovieva, E.Spataro, S.Spruck, B.Starič, M.Stavroulakis, P.Stefkova, S.Stroili, R.Sumihama, M.Sumisawa, K.Sutcliffe, W.Suwonjandee, N.Svidras, H.Takahashi, M.Takizawa, M.Tamponi, U.Tanida, K.Tenchini, F.Thaller, A.Tittel, O.Tiwary, R.Tonelli, D.Torassa, E.Trabelsi, K.Tsaklidis, I.Ueda, I.Unger, K.Unno, Y.Uno, K.Uno, S.Vahsen, S. E.van Tonder, R.Varvell, K. E.Veronesi, M.Vinokurova, A.Vismaya, V. S.Vitale, L.Vobbilisetti, V.Volpe, R.Wakai, M.Wallner, S.Wang, E.Wang, M. -Z.Wang, Z.Warburton, A.Watanabe, M.Watanuki, S.Werbycka, O.Wessel, C.Xu, X. P.Yabsley, B. D.Yamada, S.Yan, W.Yang, S. B.Yin, J. H.Yoshihara, K.Yuan, C. Z.Yusa, Y.Zani, L.Zeng, F.Zhang, B.Zhang, Y.Zhilich, V.Zhou, Q. D.Zhou, X. Y.Zhukova, V. I.Žlebčík, R.
Source
Subject
High Energy Physics - Experiment
Language
Abstract
We measure the branching fraction of the decay $B^- \to D^0 \rho(770)^-$ using data collected with the Belle II detector. The data contain 387 million $B\overline{B}$ pairs produced in $e^+e^-$ collisions at the $\Upsilon(4S)$ resonance. We reconstruct $8360\pm 180$ decays from an analysis of the distributions of the $B^-$ energy and the $\rho(770)^-$ helicity angle. We determine the branching fraction to be $(0.939 \pm 0.021\mathrm{(stat)} \pm 0.050\mathrm{(syst)})\%$, in agreement with previous results. Our measurement improves the relative precision of the world average by more than a factor of two.