학술논문

Measurement of the $B^0$ lifetime using fully reconstructed hadronic decays in the 2019 Belle II dataset
Document Type
Working Paper
Author
Belle II CollaborationAbudinén, F.Adachi, I.Adak, R.Adamczyk, K.Ahlburg, P.Ahn, J. K.Aihara, H.Akopov, N.Aloisio, A.Ameli, F.Andricek, L.Ky, N. AnhAsner, D. M.Atmacan, H.Aulchenko, V.Aushev, T.Aushev, V.Aziz, T.Babu, V.Bacher, S.Baehr, S.Bahinipati, S.Bakich, A. M.Bambade, P.Banerjee, Sw.Bansal, S.Barrett, M.Bartel, W.Batignani, G.Baudot, J.Beaulieu, A.Becker, J.Behera, P. K.Bender, M.Bennett, J. V.Bernieri, E.Bernlochner, F. U.Bertemes, M.Bessner, M.Bettarini, S.Bhardwaj, V.Bhuyan, B.Bianchi, F.Bilka, T.Bilokin, S.Biswas, D.Bobrov, A.Bondar, A.Bonvicini, G.Bozek, A.Bračko, M.Branchini, P.Braun, N.Briere, R. A.Browder, T. E.Brown, D. N.Budano, A.Burmistrov, L.Bussino, S.Campajola, M.Cao, L.Caria, G.Casarosa, G.Cecchi, C.Červenkov, D.Chang, M. -C.Chang, P.Cheaib, R.Chekelian, V.Chen, Y. Q.Chen, Y. -T.Cheon, B. G.Chilikin, K.Cho, H. -E.Cho, K.Cho, S. -J.Choi, S. -K.Choudhury, S.Cinabro, D.Corona, L.Cremaldi, L. M.Cuesta, D.Cunliffe, S.Czank, T.Dash, N.Dattola, F.De La Cruz-Burelo, E.De Nardo, G.De Nuccio, M.De Pietro, G.de Sangro, R.Deschamps, B.Destefanis, M.Dey, S.De Yta-Hernandez, A.Di Capua, F.Di Carlo, S.Dingfelder, J.Doležal, Z.Jiménez, I. DomínguezDong, T. V.Dort, K.Dossett, D.Dubey, S.Duell, S.Dujany, G.Eidelman, S.Eliachevitch, M.Epifanov, D.Fast, J. E.Ferber, T.Ferlewicz, D.Finocchiaro, G.Fiore, S.Fischer, P.Fodor, A.Forti, F.Frey, A.Friedl, M.Fulsom, B. G.Gabriel, M.Gabyshev, N.Ganiev, E.Garcia-Hernandez, M.Garg, R.Garmash, A.Gaur, V.Gaz, A.Gebauer, U.Gelb, M.Gellrich, A.Gemmler, J.Geßler, T.Getzkow, D.Giordano, R.Giri, A.Glazov, A.Gobbo, B.Godang, R.Goldenzweig, P.Golob, B.Gomis, P.Grace, P.Gradl, W.Graziani, E.Greenwald, D.Guan, Y.Hadjivasiliou, C.Halder, S.Hara, K.Hara, T.Hartbrich, O.Hauth, T.Hayasaka, K.Hayashii, H.Hearty, C.Heck, M.Hedges, M. T.de la Cruz, I. HerediaVillanueva, M. HernándezHershenhorn, A.Higuchi, T.Hill, E. C.Hirata, H.Hirose, S.Hoek, M.Hohmann, M.Hollitt, S.Hotta, T.Hsu, C. -L.Hu, Y.Huang, K.Iijima, T.Inami, K.Inguglia, G.Jabbar, J. IrakkathilIshikawa, A.Itoh, R.Iwasaki, M.Iwasaki, Y.Iwata, S.Jackson, P.Jacobs, W. W.Jaegle, I.Jaffe, D. E.Jang, E. -J.Jeandron, M.Jeon, H. B.Jia, S.Jin, Y.Joo, C.Joo, K. K.Kadenko, I.Kahn, J.Kakuno, H.Kaliyar, A. B.Kandra, J.Kang, K. H.Kapusta, P.Karyan, G.Kato, Y.Kawai, H.Kawasaki, T.Keck, T.Ketter, C.Kichimi, H.Kiesling, C.Kim, B. H.Kim, C. -H.Kim, D. Y.Kim, H. J.Kim, J. B.Kim, K. -H.Kim, K.Kim, S. -H.Kim, Y. -K.Kim, Y.Kimmel, T. D.Kindo, H.Kinoshita, K.Kirby, B.Kleinwort, C.Knysh, B.Kodyš, P.Koga, T.Kohani, S.Koirala, S.Komarov, I.Konno, T.Korpar, S.Kou, E.Kovalchuk, N.Kraetzschmar, T. M. G.Križan, P.Kroeger, R.Krohn, J. F.Krokovny, P.Krüger, H.Kuehn, W.Kuhr, T.Kumar, J.Kumar, M.Kumar, R.Kumara, K.Kumita, T.Kunigo, T.Künzel, M.Kurz, S.Kuzmin, A.Kvasnička, P.Kwon, Y. -J.Lacaprara, S.Lai, Y. -T.La Licata, C.Lalwani, K.Lanceri, L.Lange, J. S.Lautenbach, K.Laycock, P. J.Diberder, F. R. LeLee, I. -S.Lee, S. C.Leitl, P.Levit, D.Lewis, P. M.Li, C.Li, L. K.Li, S. X.Li, Y. M.Li, Y. B.Libby, J.Lieret, K.Gioi, L. LiLin, J.Liptak, Z.Liu, Q. Y.Liu, Z. A.Liventsev, D.Longo, S.Loos, A.Lu, P.Lubej, M.Lueck, T.Luetticke, F.Luo, T.MacQueen, C.Maeda, Y.Maggiora, M.Maity, S.Manfredi, R.Manoni, E.Marcello, S.Marinas, C.Martini, A.Masuda, M.Matsuda, T.Matsuoka, K.Matvienko, D.McNeil, J.Meggendorfer, F.Mei, J. C.Meier, F.Merola, M.Metzner, F.Milesi, M.Miller, C.Miyabayashi, K.Miyake, H.Miyata, H.Mizuk, R.Azmi, K.Mohanty, G. B.Moon, H.Moon, T.Grimaldo, J. A. MoraMorda, A.Morii, T.Moser, H. -G.Mrvar, M.Mueller, F.Müller, F. J.Muller, Th.Muroyama, G.Mussa, R.Nakagiri, K.Nakamura, I.Nakamura, K. R.Nakano, E.Nakao, M.Nakayama, H.Nakazawa, H.Nanut, T.Natkaniec, Z.Nayak, M.Nazaryan, G.Neverov, D.Niebuhr, C.Niiyama, M.Ninkovic, J.Nisar, N. K.Nishida, S.Nishimura, K.Nishimura, M.Nouxman, M. H. A.Oberhof, B.Ogawa, K.Ogawa, S.Olsen, S. L.Onishchuk, Y.Ono, H.Onuki, Y.Oskin, P.Oxford, E. R.Ozaki, H.Pakhlov, P.Pakhlova, G.Paladino, A.Pang, T.Panta, A.Paoloni, E.Park, C.Park, H.Park, S. -H.Paschen, B.Passeri, A.Pathak, A.Patra, S.Paul, S.Pedlar, T. K.Peruzzi, I.Peschke, R.Pestotnik, R.Piccolo, M.Piilonen, L. E.Podesta-Lerma, P. L. M.Popov, V.Praz, C.Prencipe, E.Prim, M. T.Purohit, M. V.Rados, P.Rasheed, R.Reif, M.Reiter, S.Remnev, M.Resmi, P. K.Ripp-Baudot, I.Ritter, M.Ritzert, M.Rizzo, G.Rizzuto, L. B.Robertson, S. H.Pérez, D. RodríguezRoney, J. M.Rosenfeld, C.Rostomyan, A.Rout, N.Rozanska, M.Rummel, S.Russo, G.Sahoo, D.Sakai, Y.Sanders, D. A.Sandilya, S.Sangal, A.Santelj, L.Sartori, P.Sasaki, J.Sato, Y.Savinov, V.Scavino, B.Schram, M.Schreeck, H.Schueler, J.Schwanda, C.Schwartz, A. J.Schwenker, B.Seddon, R. M.Seino, Y.Selce, A.Senyo, K.Seong, I. S.Sevior, M. E.Sfienti, C.Shebalin, V.Shen, C. P.Shibuya, H.Shiu, J. -G.Shwartz, B.Sibidanov, A.Simon, F.Singh, J. B.Skambraks, S.Smith, K.Sobie, R. J.Soffer, A.Sokolov, A.Soloviev, Y.Solovieva, E.Spataro, S.Spruck, B.Starič, M.Stefkova, S.Stottler, Z. S.Stroili, R.Strube, J.Stypula, J.Sumihama, M.Sumisawa, K.Sumiyoshi, T.Summers, D. J.Sutcliffe, W.Suzuki, K.Suzuki, S. Y.Tabata, M.Takahashi, M.Takizawa, M.Tamponi, U.Tanaka, S.Tanida, K.Tanigawa, H.Taniguchi, N.Tao, Y.Taras, P.Tenchini, F.Tonelli, D.Torassa, E.Trabelsi, K.Tsuboyama, T.Tsuzuki, N.Uchida, M.Ueda, I.Uehara, S.Ueno, T.Uglov, T.Unger, K.Unno, Y.Uno, S.Urquijo, P.Ushiroda, Y.Usov, Y.Vahsen, S. E.van Tonder, R.Varner, G. S.Varvell, K. E.Vinokurova, A.Vitale, L.Vorobyev, V.Vossen, A.Waheed, E.Wakeling, H. M.Wan, K.Abdullah, W. WanWang, B.Wang, C. H.Wang, M. -Z.Wang, X. L.Warburton, A.Watanabe, M.Watanuki, S.Watson, I.Webb, J.Wehle, S.Welsch, M.Wessel, C.Wiechczynski, J.Wieduwilt, P.Windel, H.Won, E.Wu, L. J.Xu, X. P.Yabsley, B.Yamada, S.Yan, W.Yang, S. B.Ye, H.Yelton, J.Yeo, I.Yin, J. H.Yonenaga, M.Yook, Y. M.Yoshinobu, T.Yuan, C. Z.Yuan, G.Yuan, W.Yusa, Y.Zani, L.Zhang, J. Z.Zhang, Y.Zhang, Z.Zhilich, V.Zhou, Q. D.Zhou, X. Y.Zhukova, V. I.Zhulanov, V.Zupanc, A.
Source
Subject
High Energy Physics - Experiment
Language
Abstract
This document presents the measurement of $B^0$ meson lifetimes using the 2019 Belle II dataset that corresponds to an integrated luminosity of $8.7 \pm 0.2$ fb$^{-1}$. Each candidate is fully reconstructed with hadronic decay final states on the signal side, while the rest-of-event technique allows to infer the decay vertex position on the other (tag) side. $B^0$ lifetime is extracted from an unbinned maximum likelihood fit to the distribution of the difference between the signal side $B^0$ candidate and the tag side decay times. The measured lifetime is $\tau_{B^0} = 1.48 \pm 0.28 \pm 0.06 $ ps, where the first uncertainty is statistical and the second is systematic.
Comment: 16 pages, 5 figures