학술논문

Measurement of branching-fraction ratios and $CP$ asymmetries in $B^{\pm} \to D_{CP\pm}K^{\pm}$ decays at Belle and Belle II
Document Type
Working Paper
Author
Belle, TheCollaborations, Belle IIAdachi, I.Aggarwal, L.Aihara, H.Akopov, N.Aloisio, A.Ky, N. AnhAsner, D. M.Atmacan, H.Aushev, T.Aushev, V.Aversano, M.Ayad, R.Babu, V.Bae, H.Bahinipati, S.Bambade, P.Banerjee, Sw.Barrett, M.Baudot, J.Bauer, M.Baur, A.Beaubien, A.Becherer, F.Becker, J.Behera, P. K.Belous, K.Bennett, J. V.Bernlochner, F. U.Bertacchi, V.Bertemes, M.Bertholet, E.Bessner, M.Bettarini, S.Bhuyan, B.Bianchi, F.Bilka, T.Biswas, D.Bobrov, A.Bodrov, D.Bolz, A.Bondar, A.Borah, J.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.Chang, P.Cheema, P.Chekelian, V.Cheon, B. G.Chilikin, K.Chirapatpimol, K.Cho, H. -E.Cho, K.Choi, S. -K.Choi, Y.Choudhury, S.Cochran, J.Corona, L.Cremaldi, L. M.Czank, T.Das, S.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.De Yta-Hernandez, A.Dhamija, R.Di Canto, A.Di Capua, F.Dingfelder, J.Doležal, Z.Jiménez, I. DomínguezDong, T. V.Dorigo, M.Dort, K.Dossett, D.Dreyer, S.Dubey, S.Dujany, G.Ecker, P.Eliachevitch, M.Feichtinger, P.Ferber, T.Ferlewicz, D.Fillinger, T.Finck, C.Finocchiaro, G.Fodor, A.Forti, F.Frey, A.Fulsom, B. G.Gabrielli, A.Ganiev, E.Garcia-Hernandez, M.Garg, R.Garmash, A.Gaudino, G.Gaur, V.Gaz, A.Gellrich, A.Ghevondyan, G.Ghosh, D.Ghumaryan, H.Giakoustidis, G.Giordano, R.Giri, A.Gobbo, B.Godang, R.Gogota, O.Goldenzweig, P.Gradl, W.Granderath, S.Graziani, E.Greenwald, D.Gruberová, Z.Gu, T.Guan, Y.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. HernándezHershenhorn, A.Higuchi, T.Hill, E. C.Hoek, M.Hohmann, M.Horak, P.Hou, W. -S.Hsu, C. -L.Iijima, T.Inami, K.Ipsita, N.Ishikawa, A.Ito, S.Itoh, R.Iwasaki, M.Jackson, P.Jacobs, W. W.Jang, E. -J.Ji, Q. P.Jia, S.Jin, Y.Johnson, A.Junkerkalefeld, H.Kakuno, H.Kaliyar, A. B.Kandra, J.Kang, K. H.Karyan, G.Kawasaki, T.Keil, F.Ketter, C.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.Korobov, A.Korpar, S.Kovalenko, E.Kowalewski, R.Kraetzschmar, T. M. G.Križan, P.Krokovny, P.Kuhr, T.Kumar, M.Kumar, R.Kumara, K.Kunigo, T.Kuzmin, A.Kwon, Y. -J.Lacaprara, S.Lai, Y. -T.Lam, T.Lanceri, L.Lange, J. S.Laurenza, M.Leboucher, R.Diberder, F. R. LeLee, M. J.Leitl, P.Levit, D.Lewis, P. M.Li, C.Li, J.Li, L. K.Li, Y.Libby, J.Liu, Q. Y.Liu, Z. Q.Liventsev, D.Longo, S.Lueck, T.Luo, T.Lyu, C.Ma, Y.Maggiora, M.Maharana, S. P.Maiti, R.Maity, S.Mancinelli, G.Manfredi, R.Manoni, E.Mantovano, M.Marcantonio, D.Marcello, S.Marinas, C.Martel, L.Martellini, C.Martini, A.Martinov, T.Massaccesi, L.Masuda, M.Matsuda, T.Matvienko, D.Maurya, S. K.McKenna, J. A.Mehta, R.Meier, F.Merola, M.Metzner, F.Milesi, M.Miller, C.Mirra, M.Miyabayashi, K.Mizuk, R.Mohanty, G. B.Molina-Gonzalez, N.Mondal, S.Moneta, S.Moser, H. -G.Mrvar, M.Mussa, R.Nakamura, I.Nakano, T.Nakazawa, Y.Charan, A. NarimaniNaruki, M.Natkaniec, Z.Natochii, A.Nayak, L.Nazaryan, G.Nisar, N. K.Nishida, S.Ogawa, S.Ono, H.Onuki, Y.Oskin, P.Otani, F.Pakhlov, P.Pakhlova, G.Paladino, A.Panta, A.Paoloni, E.Pardi, S.Parham, K.Park, H.Park, S. -H.Paschen, B.Passeri, A.Patra, S.Paul, S.Pedlar, T. K.Peruzzi, I.Peschke, R.Pestotnik, R.Pham, F.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.Rad, N.Rados, P.Raeuber, G.Raiz, S.Reif, M.Reiter, S.Remnev, M.Ripp-Baudot, I.Rizzo, G.Rizzuto, L. B.Robertson, S. H.Roehrken, M.Roney, J. M.Rostomyan, A.Rout, N.Russo, G.Sahoo, D.Sandilya, S.Sangal, A.Santelj, L.Sato, Y.Savinov, V.Scavino, B.Schmitt, C.Schnell, G.Schwanda, C.Schwartz, A. J.Seino, Y.Selce, A.Senyo, K.Serrano, J.Sevior, M. E.Sfienti, C.Shan, W.Sharma, C.Shi, X. D.Shillington, T.Shiu, J. -G.Shtol, D.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.Stottler, Z. S.Stroili, R.Strube, J.Sumihama, M.Sumisawa, K.Sutcliffe, W.Svidras, H.Takahashi, M.Takizawa, M.Tamponi, U.Tanida, K.Tenchini, F.Thaller, A.Tittel, O.Tiwary, R.Tonelli, D.Torassa, E.Toutounji, N.Trabelsi, K.Tsaklidis, I.Uchida, M.Ueda, I.Uehara, S.Uematsu, Y.Uglov, T.Unger, K.Unno, Y.Uno, K.Uno, S.Urquijo, P.Ushiroda, Y.Vahsen, S. E.van Tonder, R.Varner, G. S.Varvell, K. E.Vinokurova, A.Vismaya, V. S.Vitale, L.Vobbilisetti, V.Volpe, R.Wach, B.Wakai, M.Wallner, S.Wang, D.Wang, E.Wang, M. -Z.Wang, Z.Warburton, A.Watanabe, M.Watanuki, S.Welsch, M.Wessel, C.Xu, X. P.Yabsley, B. D.Yamada, S.Yan, W.Yang, S. B.Yin, J. H.Yoshihara, K.Yuan, C. Z.Zani, L.Zhang, Y.Zhilich, V.Zhou, J. S.Zhou, Q. D.Zhukova, V. I.Žlebčík, R.
Source
Subject
High Energy Physics - Experiment
Language
Abstract
We report results from a study of $B^\pm \rightarrow DK^\pm$ decays followed by $D$ decaying to $CP$~eigenstates, where $D$ indicates a $D^0$ or $\bar{D}^{0}$ meson. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity-triangle angle $\phi_{3}$. The results are based on a combined analysis of the final data set of $772 \times 10^6~B\bar{B}$ pairs collected by the Belle experiment and a data set of $198 \times 10^6~B\bar{B}$ pairs collected by the Belle~II experiment, both in electron-positron collisions at the $\Upsilon(4S)$ resonance. We measure the $CP$ asymmetries to be $\mathcal{ A}_{CP +} =~(+12.5 \pm 5.8 \pm 1.4)\% $ and $\mathcal{ A}_{CP -} =~(-16.7 \pm 5.7 \pm 0.6)\%$, and the ratios of branching fractions to be $\mathcal{ R}_{CP+}=~1.164 \pm 0.081 \pm 0.036 $ and $\mathcal{ R}_{CP-} =~1.151 \pm 0.074 \pm 0.019$. The first contribution to the uncertainties is statistical, and the second is systematic. The asymmetries $\mathcal{A}_{CP +}$ and $\mathcal{A}_{CP -}$ have similar magnitudes and opposite signs; their difference corresponds to 3.5~standard deviations. From these values we calculate 68.3\% confidence intervals of ($8.5^{\circ}<\phi_{3}<16.5^{\circ}$) or ($84.5^{\circ}<\phi_{3}<95.5^{\circ}$) or ($163.3^{\circ}<\phi_{3}<171.5^{\circ}$) and $0.321