Author: "S. Korpar" / Publisher: american physical society (aps) - Searchworks@Jio Institute Digital Library Search Results

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322 results on '"S. Korpar"'

1. Search for B+→K+νν¯ Decays Using an Inclusive Tagging Method at Belle II

Author: T. Pang, S. Patra, A. Pathak, K. Adamczyk, G.V. Russo, J. Libby, D. M. Asner, T. Matsuda, Enrico Bernieri, K. Hayasaka, T. V. Dong, Tomoyuki Konno, E. Kovalenko, L. Zani, S. Fiore, F. R. Le Diberder, C. Lyu, A. Vinokurova, S. Dubey, I. Heredia-De La Cruz, P. Grace, J. Baudot, C. H. Li, I. M. Peruzzi, S.-J. Cho, Y. Seino, A. De Yta-Hernandez, O. Hartbrich, Y. Ushiroda, C. Niebuhr, X. Y. Zhou, B. Wach, H. Windel, E. Graziani, E. De La Cruz-Burelo, M. T. Prim, D. Liventsev, P. Krokovny, Rakesh Kumar, C. La Licata, B.A. Shwartz, Takeo Kawasaki, F. Bianchi, H. M. Wakeling, L. E. Piilonen, I. Domínguez Jiménez, Hitoshi Hirata, K. H. Kang, K. Cho, P. Oskin, Agnese Martini, S. Sandilya, A. Kuzmin, M. Welsch, R. Mizuk, E. Ganiev, P. Taras, D. Biswas, A. B. Kaliyar, T. Iijima, C. W. Joo, A. Sangal, T. M. G. Kraetzschmar, S. Stefkova, M. Starič, M. Z. Wang, Andrey Sokolov, Nils Braun, K. Matsuoka, T. Kuhr, Y.-T. Lai, S. Ogawa, D. Cinabro, R. Giordano, A. Baur, H. Ye, J. Schueler, M. E. Sevior, Claudia Cecchi, A. Panta, M. Merola, W. Gradl, P. L. M. Podesta-Lerma, Antonio Budano, K. Chilikin, N. Akopov, G. Inguglia, G. Nazaryan, T. Kunigo, C. Ketter, P. Goldenzweig, A. Gaz, A. Korobov, P. Chang, M. Kumar, M. De Nuccio, K. Nishimura, Frank Simon, R. M. Seddon, D. E. Jaffe, Abner Soffer, N. Anh Ky, H. Ozaki, V. Babu, K. Senyo, S. H. Robertson, S. Nishida, C. H. Chen, S. E. Vahsen, A. J. Schwartz, Kazuhiko Hara, A. Frey, D. Epifanov, Marco Milesi, M. Hernandez Villanueva, G. Finocchiaro, Dipak Kumar Sahoo, P. Bambade, K. Tanida, Y. M. Yook, J. Serrano, T. Ferber, S. Cunliffe, X. L. Wang, Yizeng Li, A. Di Canto, S. Bussino, Sunil Bansal, J. Bennett, Andreas Warburton, Y. Iwasaki, F. Abudinén, Y. J. Kwon, Somnath Choudhury, Tagir Aushev, S. Kurz, Semen Eidelman, S. Pardi, S. Spataro, T. Humair, K. Nakamura, V. Zhukova, Y. Onuki, Makoto Tabata, V. Chekelian, D. Rodríguez Pérez, G. De Nardo, S. Y. Suzuki, S. Hazra, T. K. Pedlar, N. Taniguchi, M. Takizawa, J. G. Shiu, R. Mussa, Jakub Kandra, M. Campajola, N. Rout, X. P. Xu, B. Paschen, Paul Jackson, Y.-T. Chen, Soumen Paul, M. Uchida, Felix Metzner, A. Gellrich, S. Raiz, H. Svidras, A. Garmash, C. Hadjivasiliou, Daniel Greenwald, John Yelton, L. K. Li, R. Van Tonder, M. Hohmann, A. Lozar, Z. Doležal, A. Natochii, A. Ishikawa, K. Inami, N. Toutounji, N. Rad, R. Pestotnik, E. Paoloni, M. Nakao, Stefano Longo, F. Tenchini, I. Ripp-Baudot, F. Meier, P. Križan, M. Remnev, H. Miyake, C.-L. Hsu, L. Cao, B. Scavino, D. A. Sanders, D. Matvienko, J. Wiechczynski, Seongbae Yang, H. Tanigawa, T. Podobnik, B. Spruck, K. Dort, B. Golob, Melissa K. Takahashi, S. Prell, S. Bettarini, Bruce Yabsley, Shih-Chang Lee, S. Duell, C. Miller, C. Hearty, E. Prencipe, Q. Y. Liu, P. Ahlburg, Martin Ritter, Dmytro Levit, M. Maggiora, Phillip Urquijo, N. K. Nisar, K. Lieret, K. Trabelsi, C. H. Kim, Z. Liptak, E. C. Hill, H. Park, S. X. Li, A. Bozek, W. A. T. Wan Abdullah, H. G. Moser, H. Atmacan, D. J. Summers, J. S. Lange, K. Uno, T. Koga, A. Selce, A. Passeri, M. Piccolo, Peter Kodys, R. Karl, T. D. Kimmel, E. Waheed, V.N. Zhilich, V. Aushev, Carlos Marinas, W. W. Jacobs, M. Bertemes, D. Ferlewicz, H. Hayashii, W. Sutcliffe, Elisa Manoni, R. J. Sobie, John Webb, L. Vitale, K. Chirapatpimol, M. Eliachevitch, J. Kumar, S.-H. Park, Yuki Sato, V. Popov, C. Z. Yuan, L. Santelj, S. Dey, K. Miyabayashi, Y. Guan, A. Paladino, R. Manfredi, E. Solovieva, T. Lueck, A. Sibidanov, A. Glazov, M. Laurenza, L. B. Rizzuto, G. de Marino, G. S. Varner, A. Hershenhorn, J. H. Yin, R. Cheaib, P. Branchini, G. Karyan, K. Kumara, Florian Urs Bernlochner, K. Gudkova, S. Lacaprara, V. Savinov, C. Kiesling, R. de Sangro, Z. S. Stottler, G. B. Mohanty, Alberto Aloisio, F. Krinner, A. K. Giri, Y. Yusa, S. Marcello, S. Baehr, G. Rizzo, M. Bračko, M. Destefanis, R. Itoh, K. Yoshihara, Concettina Sfienti, M. Masuda, G. Dujany, M. Iwasaki, F. Dattola, Sw. Banerjee, Satoshi Tanaka, E. Torassa, B. G. Cheon, L. M. Cremaldi, C. Murphy, C. Wessel, N. Gabyshev, D. Červenkov, A. Rostomyan, S. Korpar, F. Forti, M. Mrvar, B. G. Fulsom, R. Godang, S. Watanuki, Prafulla Kumar Behera, K. Sumisawa, S. Kohani, L. Corona, J. Irakkathil Jabbar, M. Garcia-Hernandez, G. Pakhlova, A. Fodor, H. Kichimi, Kevin Varvell, E. Bertholet, Takeo Higuchi, H. Aihara, F. Müller, Y. Usov, K. Lautenbach, Pere Rados, G. De Pietro, J. M. Roney, V. Gaur, M. Sumihama, C. Praz, M. Nayak, Ya-Qiu Jin, D. Tonelli, M. Hoek, Yongsun Kim, B. Gobbo, S. Uno, C. Schwanda, H. Ono, P. Leitl, R. Stroili, Y. Unno, D. Y. Kim, Q. D. Zhou, Iki Adachi, G. Polat, T. Fillinger, S. Pokharel, F. Di Capua, Y. Onishchuk, P. Pakhlov, P. Lewis, G. Casarosa, T. Czank, Jürgen Becker, S. Yamada, Jochen Dingfelder, W. B. Yan, Z. Natkaniec, U. Tamponi, M. Bessner, Surajit Maity, L. Lanceri, H. Junkerkalefeld, S. Halder, T. Bilka, and T. E. Browder
Subjects: Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, Resonance, 01 natural sciences, law.invention, Pair production, law, 0103 physical sciences, High Energy Physics::Experiment, B meson, 010306 general physics, Collider, Energy (signal processing)
Abstract: A search for the flavor-changing neutral-current decay B^{+}→K^{+}νν[over ¯] is performed at the Belle II experiment at the SuperKEKB asymmetric energy electron-positron collider. The data sample corresponds to an integrated luminosity of 63 fb^{-1} collected at the ϒ(4S) resonance and a sample of 9 fb^{-1} collected at an energy 60 MeV below the resonance. Because the measurable decay signature involves only a single charged kaon, a novel measurement approach is used that exploits not only the properties of the B^{+}→K^{+}νν[over ¯] decay, but also the inclusive properties of the other B meson in the ϒ(4S)→BB[over ¯] event, to suppress the background from other B meson decays and light-quark pair production. This inclusive tagging approach offers a higher signal efficiency compared to previous searches. No significant signal is observed. An upper limit on the branching fraction of B^{+}→K^{+}νν[over ¯] of 4.1×10^{-5} is set at the 90% confidence level.
Published: 2021

2. Measurement of the branching fraction of Λc+→pω decay at Belle

Author: T. Matsuda, A. Vinokurova, P. Pakhlov, D. Y. Kim, P. Krokovny, K. H. Kang, K. Cho, H. Park, A. Bozek, C.-L. Hsu, K. T. Kim, D. Epifanov, P. Goldenzweig, C. Sharma, J. Libby, Peter Kodys, W. W. Jacobs, M. Uchida, S. X. Li, K. K. Joo, L. K. Li, R. Mizuk, S. Sandilya, R. Dhamija, D. Liventsev, S. K. Choi, K. Tanida, Y. Yusa, E. Kovalenko, P. K. Behera, Y. Seino, S.-J. Cho, V.N. Zhilich, Y. Kato, V. Bhardwaj, T. K. Pedlar, G. De Pietro, P. Branchini, G. S. Varner, K.-H. Kim, Y.-T. Lai, Z. P. Zhang, Andrey Sokolov, M. T. Prim, M. Niiyama, J. H. Yin, M. Starič, C. Hadjivasiliou, M. Merola, C. P. Shen, K. Miyabayashi, T. Gu, M. Nayak, A. K. Giri, R. Itoh, H. Kichimi, F. Tenchini, Victoria Zhukova, A. Chen, S. Nishida, T. V. Dong, Y. Choi, M. Masuda, L. Nayak, T. Aushev, L. Santelj, A. Rostomyan, P. Wang, T. Podobnik, M. Takizawa, T. Sumiyoshi, H. Hayashii, Ya-Qiu Jin, J. G. Shiu, S. Al Said, S. E. Vahsen, T. Ferber, O. Hartbrich, T. Uglov, K. Gudkova, C. H. Kim, B. Golob, G. Schnell, Phillip Urquijo, T. Sanuki, T. Iijima, John Yelton, Z. Doležal, S. Das, M. Z. Wang, K. Kinoshita, N. K. Nisar, J. Li, A. Korobov, K. Kumara, N. Gabyshev, D. Červenkov, J. V. Bennett, H. Aihara, J. S. Lange, K. Uno, Y. Usov, S. Cunliffe, Jyoti Prakash Biswal, T. Pang, Y. B. Li, Yongsun Kim, T. Konno, Y. Guan, Y. Iwasaki, M. C. Chang, S. Uno, Y. J. Kwon, C. Schwanda, Seongbae Yang, G.V. Russo, K. Senyo, Z. S. Stottler, M. Shapkin, Antonio Budano, V. Gaur, Shih-Chang Lee, W. S. Hou, L. E. Piilonen, M. Nakao, B. G. Cheon, M. Röhrken, K. Chilikin, J. F. Strube, G. Pakhlova, P. Oskin, R. Mussa, S. Ogawa, N. Rout, R. Van Tonder, C. MacQueen, A. Ishikawa, Frank Simon, D. Bodrov, E. Wang, Vladimir Popov, Rahul Kumar, E. Waheed, R. B. Garg, B. Bhuyan, K. Hayasaka, A. Bobrov, K. Belous, S. Korpar, R. Kroeger, M. E. Sevior, Sudhanwa Patra, B. G. Fulsom, E. Graziani, T. E. Browder, P. Križan, Seokhee Park, H. E. Cho, R. Pestotnik, M. Campajola, A. B. Kaliyar, K. Lieret, M. Sumihama, M. Laurenza, Motoki Iwasaki, E. Won, Doyen Sahoo, W. Sutcliffe, V. Savinov, J. Borah, E. Solovieva, G. De Nardo, A. Natochii, K. Inami, M. Bračko, E. Prencipe, Bruce Yabsley, D. Cinabro, P. Chang, Somnath Choudhury, I. Adachi, F. Di Capua, W. B. Yan, H. Ono, Y. Unno, L. Li Gioi, H. Ye, S. Halder, Martin Florian Bessner, T. Bilka, U. Tamponi, S. Jia, C. H. Wang, S. Paul, and D. M. Asner
Subjects: Nuclear physics, Physics, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, 010306 general physics, 01 natural sciences
Published: 2021

3. Measurements of the Branching Fractions of the Semileptonic Decays Ξc0→Ξ−ℓ+νℓ and the Asymmetry Parameter of Ξc0→Ξ−π+

Author: S. Jia, U. Tamponi, Dipak Kumar Sahoo, S. Pardi, A. Garmash, M. Bessner, G. Bonvicini, A. Natochii, N. K. Nisar, A. Vinokurova, M. Iwasaki, O. Hartbrich, B. Bhuyan, J. S. Lange, K. Uno, Andrey Sokolov, P. Krokovny, O. Grzymkowska, C. H. Wang, K.-H. Kim, L. E. Piilonen, Rakesh Kumar, J. Bennett, Jyoti Prakash Biswal, B. G. Cheon, D. Liventsev, K. H. Kang, K. Cho, S. Paul, S. Al Said, D. Cinabro, M. Z. Wang, K. Kinoshita, Yizeng Li, Semen Eidelman, Y. Jin, R. Kroeger, I. S. Lee, V. Savinov, M. Uchida, R. Mussa, T. Pang, A. Ishikawa, S. Patra, M. Kumar, P. Križan, P. Goldenzweig, H. Ye, R. Mizuk, S. Nishida, H. Ono, V. Bhardwaj, K. Adamczyk, S. Korpar, D. Epifanov, G.V. Russo, S. Das, Y. Iwasaki, A. Kuzmin, L. Nayak, V. Babu, G. Schnell, Y. J. Kwon, X. P. Xu, X. L. Wang, Prafulla Kumar Behera, S. Ogawa, G. S. Varner, J. T. McNeil, L. Li Gioi, A. Korobov, C. W. Joo, E. Prencipe, Somnath Choudhury, R. Van Tonder, N. Rout, M. Sumihama, P. L. Wang, T. Ferber, T. K. Pedlar, T. Kuhr, S. Cunliffe, H. Hayashii, R. Ayad, K. Kumara, M. Niiyama, R. Itoh, R. Dhamija, A. Rostomyan, J. G. Shiu, J. Libby, D. M. Asner, L. K. Li, M. C. Chang, K. Hayasaka, A. K. Giri, T. Mori, H. Aihara, B. G. Fulsom, K. Tanida, D. Y. Kim, Y. Usov, Seongbae Yang, T. Bilka, Tagir Aushev, Z. S. Stottler, E. Kovalenko, V. Zhukova, Y. Onuki, K. Lalwani, C. H. Li, S. Uno, A. Vossen, M. Masuda, Iki Adachi, M. Watanabe, T. E. Browder, H. Park, A. Bozek, Tomoyuki Konno, K. Nishimura, Y. Seino, C. Schwanda, M. Hernandez Villanueva, M. Campajola, E. Won, S. Watanuki, T. Uglov, M. T. Prim, Z. P. Zhang, T. V. Dong, Y. Sakai, V.N. Zhilich, Y. Kato, S. Sandilya, K. Lieret, F. Tenchini, V. Gaur, S.-J. Cho, T. Podobnik, G. Pakhlova, C.-L. Hsu, M. Starič, N. Dash, E. Solovieva, C. Sharma, M. Nayak, K. Senyo, Peter Kodys, W. W. Jacobs, T. Sanuki, C. P. Shen, Seok Kim, Shih-Chang Lee, D. Matvienko, F. Di Capua, C. H. Kim, G. Karyan, H. Kichimi, P. Pakhlov, N. Gabyshev, D. Červenkov, Rocky Bala Garg, W. B. Yan, Sadaharu Uehara, C. Hadjivasiliou, J. H. Yin, M. Bračko, A. Chen, G. De Nardo, G. B. Mohanty, M. Shapkin, M. Röhrken, K. Chilikin, C. Z. Yuan, Y. Choi, V. Popov, L. Santelj, R. Pestotnik, S. K. Choi, K. Gudkova, Felix Metzner, K. K. Joo, and T. J. Moon
Subjects: Physics, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Zero (complex analysis), General Physics and Astronomy, Branching (polymer chemistry), 01 natural sciences, Asymmetry, Crystallography, KEKB, 0103 physical sciences, 010306 general physics, media_common, Lepton
Abstract: Using data samples of 89.5 and 711fb$^{-1}$ recorded at energies of $\sqrt{s}$=10.52 and 10.58 GeV, respectively, with the Belle detector at the KEKB e$^{+}$e$^{-}$ collider, we report measurements of branching fractions of semileptonic decays Ξ$_{c}$$^{0}$ → Ξ$^{-}$l$^{+}$ν$_{l}$(l=e or μ) and the CP-asymmetry parameter of Ξ$_{c}$$^{0}$ → Ξ$^{-}$π$^{+}$ decay. The branching fractions are measured to be B(Ξ$_{c}$$^{0}$ → Ξ$^{-}$e$^{+}$ν$_{e}$)= 1.31±0.04±0.07±0.38)% and B(Ξ$_{c}$$^{0}$ → Ξ$^{-}$μ$^{+}$ν$_{μ}$ = (1.27±0.06±0.10±0.37)% , and the decay parameter α$_{Ξπ}$ is measured to be 0.63±0.03±0.01 with much improved precision compared with the current world average. The corresponding ratio B(Ξ$_{c}$$^{0}$ → Ξ$^{-}$e$^{+}$ν$_{e}$) /B(Ξ$_{c}$$^{0}$ → Ξ$^{-}$μ$^{+}$ν$_{μ}$) is 1.03±0.05±0.07, which is consistent with the expectation of lepton flavor universality. The first measured asymmetry parameter A$_{CP}$=(α$_{Ξ^{-}π^{+}}$+α$_{Ξ^{+}π^{-}}$)/(α$_{Ξ^{-}π^{+}}$+α$_{Ξ^{+}π^{-}}$) = 0.024±0.052±0.014 is found to be consistent with zero. The first and the second uncertainties above are statistical and systematic, respectively, while the third ones arise due to the uncertainty of the Ξ$_{c}$$^{0}$ → Ξ$^{-}$π$^{+}$ branching fraction.
Published: 2021

4. Evidence for the decay Ωc0→π+Ω(2012)−→π+(K¯Ξ)−

Author: G. Schnell, F. Tenchini, S. Das, T. Kuhr, Y. Sakai, T. Podobnik, T. Sumiyoshi, S.-J. Cho, Antonio Budano, L. Li Gioi, K. Senyo, K. Lieret, J. Libby, K. Trabelsi, Y. Yusa, K. Kumara, P. Pakhlov, Shih-Chang Lee, C. Hadjivasiliou, G. De Pietro, F. Di Capua, E. Kovalenko, T. Sanuki, Z. S. Stottler, L. E. Piilonen, G. Pakhlova, T. Gu, P. Oskin, H. Ye, J. T. McNeil, Andrey Sokolov, A. Bozek, Y. Seino, E. Solovieva, D. Epifanov, C. H. Li, R. Ayad, M. Nayak, M. T. Prim, B. G. Cheon, K. Nishimura, M. Z. Wang, K. Kinoshita, D. Červenkov, Ya-Qiu Jin, Seema Bahinipati, T. V. Dong, Y. Choi, Shoichi Watanuki, Victoria Zhukova, R. Kroeger, L. Santelj, S. Nishida, T. K. Pedlar, D. Cinabro, A. Chen, H. Ono, S. Cunliffe, V. Chekelian, T. Mori, H. Aihara, Y. Usov, P. Chang, K. Tanida, C. Z. Yuan, K. Hayasaka, E. Prencipe, D. Matvienko, W. Sutcliffe, Jyoti Prakash Biswal, Y. Onuki, R. Van Tonder, V.E. Shebalin, A. Sangal, M. C. Chang, S. Al Said, S. Korpar, W. B. Yan, T. Matsuda, R. Mussa, R. B. Garg, B. G. Fulsom, Y. Unno, Somnath Choudhury, M. Takizawa, I. Adachi, S. Pardi, H. E. Cho, T. E. Browder, Z. Natkaniec, A. Ishikawa, Seokhee Park, S. Halder, N. Dash, M. Laurenza, John Yelton, E. Won, Z. Doležal, Seongbae Yang, Yongsun Kim, A. Vinokurova, T. Uglov, T. Bilka, M. Merola, K. Lalwani, V. M. Aulchenko, V. Gaur, G. De Nardo, S. Uno, C. Schwanda, V. Savinov, Bruce Yabsley, P. Križan, P. Krokovny, K. K. Joo, Vladimir Popov, M. Nakao, K. H. Kang, K. Cho, Doyen Sahoo, J. G. Shiu, A. Natochii, K. Inami, C. Kiesling, P. K. Behera, M. Bračko, E.-J. Jang, D. Y. Kim, T. Konno, E. Waheed, M. Sumihama, Martin Florian Bessner, Motoki Iwasaki, D. M. Asner, A. Passeri, K.-H. Kim, A. Korobov, M. Shapkin, O. Werbycka, H. Atmacan, K. Chilikin, Mukesh Kumar, Y. B. Li, H. Hayashii, M. Niiyama, E. Wang, C. H. Kim, Z. P. Zhang, R. Pestotnik, J. H. Yin, M. Uchida, L. K. Li, D. Liventsev, G. S. Varner, S. S. Tang, P. Wang, K. Gudkova, B. Golob, N. K. Nisar, C. P. Shen, Seok Kim, K. Uno, L. Nayak, V. Babu, T. Aushev, T. Ferber, G.V. Russo, V.N. Zhilich, K. Miyabayashi, W. S. Hou, Alexei Kuzmin, R. Mizuk, E. Graziani, M. Campajola, C. Sharma, Peter Kodys, W. W. Jacobs, S. E. Vahsen, P. Branchini, G. Karyan, Y. Iwasaki, Y. J. Kwon, A. K. Giri, N. Rout, M. Masuda, G. B. Mohanty, P. Goldenzweig, S. Sandilya, M. Starič, S. Jia, C. H. Wang, and S. Paul
Subjects: Physics, KEKB, 010308 nuclear & particles physics, Branching fraction, Isospin, 0103 physical sciences, Atomic physics, 010306 general physics, 01 natural sciences
Abstract: Using a data sample of 980 fb$^{-1}$ collected with the Belle detector operating at the KEKB asymmetric-energy e$^{+}$e$^{-}$ collider, we present evidence for the Ω(2012)$^{-}$ in the resonant substructure of Ω$_{c}$$^{0}$ → π$^{+}$ ($\overline{K}$ Ξ)$^{-}$ (($\overline{K}$ Ξ)$^{-}$ = K$^{-}$Ξ$^{0}$ + K$^{0}$Ξ$^{-}$ ecays. The significance of the decays. The significance of the Ω(2012)$^{-}$ signal is 4.2σ after considering the systematic uncertainties. The ratio of the branching fraction of Ω$_{c}$$^{0}$ → π$^{+}$ Ω(2012)$^{-}$ π$^{+}$ ($\overline{K}$ Ξ)$^{-}$ relative to that of Ω$_{c}$$^{0}$ → π$^{+}$ Ω$^{-}$ is calculated to be 0.220±0.059(stat.)±0.035(syst.). The individual ratios of the branching fractions of the two isospin modes are also determined and found to be B (Ω$_{c}$$^{0}$ → π$^{+}$ Ω(2012)$^{-}$) x B(Ω(2012)$^{-}$ → $\overline{K}$ Ξ$^{0}$) / B(Ω$_{c}$$^{0}$ → π$^{+}$ K$^{-}$Ξ$^{0}$ = (9.6±3.2(stat.) ±1.8(syst.))% and B (Ω$_{c}$$^{0}$ → π$^{+}$ Ω(2012)$^{-}$) x B(Ω(2012)$^{-}$ → $\overline{K}$$^{0}$ Ξ$^{-}$) / B(Ω$_{c}$$^{0}$ → π$^{+}$ $\overline{K}$$^{0}$Ξ$^{-}$) =(5.5±2.8(stat.) ±0.7(syst.))%
Published: 2021

5. Measurement of the masses and widths of the Σc(2455)+ and Σc(2520)+ baryons

Author: S-H Park, B. G. Cheon, Seema Bahinipati, T. V. Dong, M. Takizawa, Y. Choi, S. Das, T. Hara, J. V. Bennett, Y. Tao, S. Al Said, L. Santelj, H. Aihara, S. E. Vahsen, M. Uchida, L. K. Li, D. Liventsev, G. S. Varner, Y. Usov, R. Itoh, A. Rostomyan, P. Wang, Zhukova, K. Gudkova, K. Belous, L. Nayak, John Yelton, S. Korpar, D. Matvienko, Gaur, O. Hartbrich, Y. Iwasaki, U. Tamponi, N. Dash, T. Aushev, K. Senyo, S. Pardi, R. B. Garg, A. Chen, B. Bhuyan, G. De Nardo, A. Korobov, M. Sumihama, M. Niiyama, N. Rout, Motoki Iwasaki, T. Ferber, Chekelian, B. G. Fulsom, J-G Shiu, G. Schnell, S. Jia, S. Uno, C. Schwanda, T. E. Browder, Z. P. Zhang, R. Mizuk, S. Cunliffe, M. Shapkin, Andrey Sokolov, G. De Pietro, M. Laurenza, K. Chilikin, P. Goldenzweig, T. Matsuda, A. Sangal, T. Kuhr, S. Sandilya, Shih-Chang Lee, I. Adachi, M. C. Chang, Jyoti Prakash Biswal, Babu, M. Merola, Antonio Budano, Phillip Urquijo, T. Gu, Y-J Kwon, R. Kroeger, M. E. Sevior, P. Krizan, K. Kumara, M. Nakao, R. Pestotnik, M. Nayak, Ya-Qiu Jin, M. Starič, Y. B. Li, R. Dhamija, Seongbae Yang, D Wang, C.-L. Hsu, A. Vinokurova, C. Hadjivasiliou, C. H. Wang, Z. S. Stottler, L. E. Piilonen, Bruce Yabsley, K. Tanida, T. Uglov, P. Pakhlov, E. Wang, Y. Onuki, G. Pakhlova, P. Oskin, R. Kulasiri, W-S Hou, S. Paul, L. Li Gioi, C. Z. Yuan, E. Prencipe, P. Krokovny, C. Sharma, Peter Kodys, S-J Cho, J. Li, W. W. Jacobs, K. Trabelsi, H. Ye, Y. Sakai, K. H. Kang, K. Cho, S. K. Choi, T. J. Moon, K. T. Kim, D. Cinabro, C. P. Shen, Zdenek Dolezal, Seok Kim, H. Park, T. Konno, A. Bozek, K. Lieret, Martin Florian Bessner, R. Ayad, N. Gabyshev, D. Červenkov, D. Epifanov, A. Garmash, P. Branchini, D. Y. Kim, K. Sumisawa, S. Nishida, D. M. Asner, T. K. Pedlar, Zhilich, P. K. Behera, F. Tenchini, A. K. Giri, E. Solovieva, P. Chang, T. Podobnik, T. Sumiyoshi, Yk Kim, K. Hayasaka, R. Mussa, T. Sanuki, M. Masuda, R. Van Tonder, G. B. Mohanty, A. Ishikawa, H. E. Cho, Doyen Sahoo, S. Ogawa, Somnath Choudhury, W. B. Yan, E. Waheed, Z. Natkaniec, J. Libby, E. Kovalenko, Y. Seino, M. T. Prim, Shoichi Watanuki, T. Bilka, M. Watanabe, J. C. Dingfelder, F. Di Capua, K. K. Joo, A. B. Kaliyar, J. Schueler, E. Won, C. MacQueen, J. K. Ahn, H. Atmacan, G.V. Russo, E. Graziani, J. H. Yin, M. Campajola, Y. Kato, D. Ferlewicz, N. K. Nisar, Bhardwaj, J. S. Lange, K. Miyabayashi, C. Kiesling, M. Bračko, H. Ono, Y. Unno, H. Hayashii, C. H. Kim, M. Z. Wang, K. Kinoshita, Aulchenko, A. Natochii, K. Inami, Savinov, and J. T. McNeil
Subjects: Physics, Quark, Particle physics, 010308 nuclear & particles physics, Sigma, Lambda, 01 natural sciences, law.invention, Baryon, Charmed baryons, KEKB, law, 0103 physical sciences, 010306 general physics, Collider
Abstract: Using 980 ${\rm fb}^{-1}$ of data {collected} with the Belle detector operating at the KEKB asymmetric-energy $e^+e^-$ collider, we report the measurements of the masses, and the first measurements of the instrinsic widths, of the $\Sigma_c(2455)^+$ and $\Sigma_c(2520)^+$ charmed baryons. We find $M(\Sigma_c(2455)^+)-M(\Lambda_c^+) = 166.17\pm 0.05^{+0.16}_{-0.07}\ {\rm MeV}/c^2$, $\Gamma(\Sigma_c(2455)^+) = 2.3 \pm 0.3 \pm 0.3\ {\rm MeV/c^2}$, $M(\Sigma_c(2520)^+)-M(\Lambda_c^+) = 230.9 \pm 0.5 ^{+0.5}_{-0.1}\ {\rm MeV}/c^2$, and $\Gamma(\Sigma_c(2520)^+) = 17.2^{+2.3\ +3.1}_{-2.1\ -0.7}\ {\rm MeV}/c^2$, where the uncertainties are statistical and systematic, respectively. These measurements can be used to test models of the underlying quark structure of the $\Sigma_c$ states.
Published: 2021

6. Measurements of the branching fractions ofΛc+→pηandΛc+→pπ0decays at Belle

Author: Jyoti Prakash Biswal, S. Eidelman, P. Pakhlov, P. Goldenzweig, S. Cunliffe, S. Sandilya, M. Sumihama, Martin Florian Bessner, Motoki Iwasaki, M. C. Chang, M. Nakao, H. Park, A. Bozek, D. Epifanov, Soumya D. Mohanty, S-H Park, A. Ishikawa, B. H. Kim, Doyen Sahoo, E. Wang, T. Pang, M. Takizawa, D. Y. Kim, C. Z. Yuan, R. Mizuk, D. M. Asner, F. Di Capua, T. K. Pedlar, Y. Sakai, A. Chen, I. Adachi, K. Hayasaka, A. Bobrov, H. E. Cho, R. B. Garg, B. Bhuyan, B. G. Fulsom, J-G Shiu, G.V. Russo, K. Lieret, T. E. Browder, Y-J Kwon, Florian Urs Bernlochner, Z. P. Zhang, J. K. Ahn, A. Korobov, L. Nayak, W-S Hou, E. Prencipe, Zhulanov, R. Dhamija, L. E. Piilonen, G. Pakhlova, Shebalin, Alexei Kuzmin, T. Aushev, John Yelton, C.-L. Hsu, R. Kroeger, M. E. Sevior, I. S. Lee, R. Ayad, P. Krizan, M. Uchida, L. K. Li, Phillip Urquijo, Y. Yusa, C. Sharma, Peter Kodys, W. W. Jacobs, M. Campajola, S. Uehara, Shih-Chang Lee, T. Ferber, G. Schnell, T. Iijima, T. Uglov, C. W. Joo, K. Tanida, Y. Kato, D. Ferlewicz, Zhilich, D. Liventsev, E. Solovieva, S. Nishida, Zdenek Dolezal, G. De Nardo, M. Niiyama, Y. Iwasaki, H. Ono, T. Matsuda, Y. B. Li, A. B. Kaliyar, M. T. Hedges, S. Das, G. Karyan, T. Konno, K. Lalwani, T. Kuhr, G. S. Varner, B. Shwartz, Seongbae Yang, J. V. Bennett, Y. Tao, S. Uno, C. Schwanda, H. Kichimi, T. Mori, H. Aihara, A. Vossen, J. Schueler, R. Van Tonder, N. Rout, A. K. Giri, Yk Kim, F. Tenchini, T. Podobnik, T. Sumiyoshi, M. Shapkin, K. Kumara, A. Natochii, M. Masuda, K. Inami, Savinov, E. Won, R. Itoh, B. G. Cheon, E.-J. Jang, M. Röhrken, K. Chilikin, W. Sutcliffe, Y. Onuki, Z. S. Stottler, A. Garmash, A. Rostomyan, P. Wang, Zhukova, Seema Bahinipati, T. V. Dong, T. Sanuki, T. Bilka, SX Li, P. Krokovny, L. Cao, Y. Choi, M. Z. Wang, K. Kinoshita, K. Gudkova, X. P. Xu, K. H. Kang, K. Cho, Popov, L. Santelj, Sudhanwa Patra, K. Trabelsi, C. H. Li, Ya-Qiu Jin, S. Korpar, R. Pestotnik, C. P. Shen, Seok Kim, N. Dash, A. Sangal, P. K. Behera, D. Matvienko, Mukesh Kumar, H. Hayashii, Gaur, O. Hartbrich, Babu, M. Merola, K. Senyo, J. H. Yin, C. H. Kim, T. Kawasaki, S. Jia, K. T. Kim, W. B. Yan, C. Hadjivasiliou, Z. Natkaniec, B. Golob, O. Grzymkowska, C. H. Wang, S. Paul, L. Li Gioi, Felix Metzner, N. K. Nisar, H. Ye, Bhardwaj, J. S. Lange, K. Uno, K. K. Joo, S. Pardi, Bruce Yabsley, D. Cinabro, G. Inguglia, Somnath Choudhury, J. Libby, E. Kovalenko, Y. Seino, M. T. Prim, and Shoichi Watanuki
Subjects: Quark, Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Branching fraction, Branching (polymer chemistry), 01 natural sciences, law.invention, KEKB, law, 0103 physical sciences, Invariant mass, 010306 general physics, Collider
Abstract: We report measurements of the branching fractions of singly Cabibbo-suppressed decays Λc+→pη and Λc+→pπ0 using the full Belle data sample corresponding to an integrated luminosity of 980.6 fb-1. The data were collected by the Belle detector at the KEKB e+e- asymmetric energy collider. A clear Λc+ signal is seen in the invariant mass distribution of pη. The fitted number of signal events of the Λc+→pη process is 7734±263; from this, we measure the ratio of branching fractions B(Λc+→pη)/B(Λc+→pK-π+)=[2.258±0.077(stat)±0.122(syst)]×10-2, from which we infer the branching fraction B(Λc+→pη)=[1.42±0.05(stat)±0.11(syst)]×10-3. In addition, no significant signal for Λc+→pπ0 is found, so an upper limit on the branching fraction of B(Λc+→pπ0)
Published: 2021

7. Measurement of branching fraction and search for CP violation in B→ϕϕK

Author: G. Schnell, S. Das, K. Tanida, W. B. Yan, Jyoti Prakash Biswal, Z. J. Liptak, J. Wiechczynski, K. Hayasaka, A. Bobrov, M. Uchida, P. Goldenzweig, V. Gaur, A. B. Kaliyar, S. Cunliffe, S. Sandilya, L. K. Li, Y. Guan, M. Nakao, J. Schueler, Motoki Iwasaki, C. W. Park, E. Won, J. G. Shiu, D. Liventsev, E. Wang, M. Starič, M. Takizawa, L. E. Piilonen, M. E. Sevior, G. Pakhlova, P. Oskin, F. Di Capua, G. S. Varner, R. Kulasiri, C.-L. Hsu, M. Bračko, H. Atmacan, A. Sangal, S. Mohanty, R. Itoh, S. Jia, S.-J. Cho, M. Merola, A. Rostomyan, Victoria Zhukova, P. Wang, T. Matsuda, Z. Doležal, Y. Onuki, Z. P. Zhang, C. Sharma, Peter Kodys, W. W. Jacobs, K. Gudkova, J. H. Yin, O. Grzymkowska, C. H. Wang, A. Chen, J. Libby, G. De Nardo, L. Li Gioi, J. F. Strube, Kohei Ogawa, Seok Kim, V. M. Aulchenko, A. Vinokurova, Y. B. Li, L. Nayak, V. Babu, T. Aushev, Rahul Kumar, G. Karyan, Frank Simon, H. Ye, A. Natochii, B. Golob, I. Adachi, F. Tenchini, K. Inami, P. Krokovny, Vladimir Popov, Kevin Varvell, N. K. Nisar, T. Podobnik, Shih-Chang Lee, T. Ferber, T. Sumiyoshi, S. Al Said, K. H. Kang, K. Cho, Y. Seino, J. Li, M. T. Prim, T. J. Moon, Sudhanwa Patra, A. K. Giri, Shoichi Watanuki, D. Cinabro, T. Konno, Y. Tao, H. Aihara, Y. Usov, T. Sanuki, K. Senyo, B. Shwartz, Y. Sakai, S. Halder, T. Bilka, M. Masuda, G. B. Mohanty, B. H. Kim, Yongsun Kim, M. Shapkin, K. Lalwani, S. Uno, C. Schwanda, M. Röhrken, Mukesh Kumar, S. K. Choi, K. Chilikin, Somnath Choudhury, E. Prencipe, H. Hayashii, S. Pardi, C. H. Kim, S. Ogawa, N. Gabyshev, D. Červenkov, E. Solovieva, Y. Unno, M. Z. Wang, K. Kinoshita, M. Nayak, X. P. Xu, Martin Florian Bessner, R. Pestotnik, D. Kotchetkov, Bruce Yabsley, R. Mizuk, Ya-Qiu Jin, D. M. Asner, R. Dhamija, C. MacQueen, A. J. Schwartz, M. Campajola, V.N. Zhilich, K. Miyabayashi, Tariq Aziz, S. Eidelman, Seema Bahinipati, T. V. Dong, Y. Choi, V. Bhardwaj, T. K. Pedlar, R. Mussa, H. B. Jeon, B. G. Cheon, A. Ishikawa, H. Park, A. Bozek, S. Korpar, N. Dash, P. Križan, S. Nishida, Doyen Sahoo, K. Kumara, X. L. Wang, V. Chekelian, Z. S. Stottler, K. K. Joo, R. Van Tonder, Seokhee Park, B. G. Fulsom, T. E. Browder, D. Y. Kim, V. Savinov, C. Hadjivasiliou, S. E. Vahsen, Y. J. Kwon, N. Rout, A. Garmash, K. Adamczyk, G.V. Russo, W. S. Hou, V. Vorobyev, and P. K. Behera
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Resonance, 01 natural sciences, Asymmetry, law.invention, KEKB, law, 0103 physical sciences, CP violation, 010306 general physics, Collider, media_common
Abstract: We report the measurement of branching fractions and CP-violation asymmetries in B→φφK decays based on a 711 fb-1 data sample containing 772×106 BB¯ events. The data were recorded at the I(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. For B+→φφK+, the branching fraction and CP-violation asymmetry measured below the ηc threshold (mφφ
Published: 2021

8. Evidence for X(3872)→J/ψπ+π− Produced in Single-Tag Two-Photon Interactions

Author: R. Mussa, G.V. Russo, A. Ishikawa, W. S. Hou, Y. Seino, S. Jia, G. Inguglia, T. Matsuda, M. Nakao, C. MacQueen, B. Bhuyan, P. Chang, P. Križan, Somnath Choudhury, G. Bonvicini, Iki Adachi, A. Vinokurova, J. G. Shiu, V. Savinov, M. Campajola, S. Pardi, Doo Young Kim, H. Aihara, A. B. Kaliyar, O. Hartbrich, J. Kahn, C.-L. Hsu, J. Schueler, Y. Teramoto, Bruce Yabsley, D. Liventsev, B. H. Kim, J. Libby, D. M. Asner, K. Hayasaka, Rakesh Kumar, Peter Kodys, M. T. Prim, Takeo Kawasaki, V. Gaur, W. W. Jacobs, K. H. Kang, V.N. Zhilich, Y. Kato, W. Sutcliffe, A. Sangal, X. L. Wang, T. Uglov, V. Chekelian, G. B. Mohanty, S. Sandilya, T. Mori, G. Karyan, S. Cunliffe, K. Miyabayashi, G. Varner, M. Shapkin, Y. Usov, R. Van Tonder, M. C. Chang, A. K. Giri, M. Takizawa, R. Ayad, K. Cho, Jyoti Prakash Biswal, G. De Nardo, M. T. Hedges, T. K. Pedlar, N. K. Nisar, M. Iwasaki, Pavel Krokovny, K. Senyo, A. Garmash, M. Masuda, G. Schnell, T. Iijima, J. S. Lange, M. Starič, T. Bilka, Semen Eidelman, E. Nakano, Vladimir Zhulanov, R. Kroeger, M. Watanabe, B. G. Cheon, T. E. Browder, T. V. Dong, E. Won, R. Pestotnik, M. E. Sevior, I. S. Lee, T. D. Kimmel, A. Kuzmin, E.-J. Jang, P. Goldenzweig, S. Ogawa, E. Prencipe, L. K. Li, C. W. Joo, U. Tamponi, Shih-Chang Lee, T. Kuhr, Tao Luo, S.-J. Cho, K. Chilikin, K. Sumisawa, Daniel Greenwald, F. Tenchini, Y. Iwasaki, Y. J. Kwon, J. H. Yin, C. Kiesling, Seongbae Yang, H. Ono, C. Beleño, E. Waheed, N. Rout, V. Vorobyev, H. Miyata, T. J. Moon, Prafulla Kumar Behera, H. Hayashii, B. G. Fulsom, E. Wang, T. Podobnik, T. Sumiyoshi, H. Park, A. Bozek, D. Matvienko, M. Hernandez Villanueva, M. Merola, Y. Jin, C. H. Wang, S. Paul, H. Kichimi, S. Al Said, Martin Ritter, Tagir Aushev, V. Zhukova, Y. Onuki, Y. Unno, J. Bennett, Z. P. Zhang, H. Ye, M. Bračko, M. Z. Wang, K. Kinoshita, M. Nayak, T. Sanuki, S. Korpar, Saraju P. Mohanty, Seok Kim, D. Kotchetkov, T. Hara, M. Mrvar, Yongsun Kim, H. Atmacan, K. K. Joo, A. Chen, V. Babu, K. Lalwani, Dipak Kumar Sahoo, S. Uno, C. Schwanda, D. Cinabro, H. Nakazawa, Rocky Bala Garg, T. Ferber, Sadaharu Uehara, R. Kulasiri, Phillip Urquijo, Kohei Ogawa, A. Natochii, M. Sumihama, K. Inami, Y. B. Li, Y. Choi, V. Popov, L. Santelj, C. Hadjivasiliou, Y. Sakai, N. Gabyshev, D. Červenkov, G. Pakhlova, L. Li Gioi, P. L. Wang, K. Kumara, M. Uchida, Z. S. Stottler, V. Bhardwaj, Z. Liptak, R. Itoh, A. Rostomyan, Seokhee Park, F. Di Capua, P. Pakhlov, S. Nishida, Z. Natkaniec, P. Lewis, Leo Piilonen, X. P. Xu, K. Lieret, E. Solovieva, John Yelton, Z. Doležal, J. B. Singh, S. K. Choi, V. Shebalin, and S. Patra
Subjects: Physics, Particle physics, Meson, General Physics and Astronomy, Virtual particle, Electron, State (functional analysis), 01 natural sciences, law.invention, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), 010306 general physics, Collider, X(3872)
Abstract: We report the first evidence for $X(3872)$ production in two-photon interactions by tagging either the electron or the position in the final state, exploring the highly virtual photon region. The search is performed in $e^+e^- \rightarrow e^+e^-J/\psi\pi^+\pi^-$, using 825 fb$^{-1}$ of data collected by the Belle detector operated at the KEKB $e^+e^-$ collider. We observe three $X(3872)$ candidates with an expected background of $0.11\pm 0.10$ events, with a significance of 3.2$\sigma$. We obtain an estimated value for $\tilde{\Gamma}_{\gamma\gamma}{\cal B}(X(3872)\rightarrow J/\psi\pi^+\pi^-$) assuming the $Q^2$ dependence predicted by a $c\bar{c}$ meson model, where $-Q^2$ is the invariant mass-squared of the virtual photon. No $X(3915)\rightarrow J/\psi\pi^+\pi^-$ candidates are found.
Published: 2021

9. Measurement of time-dependent CP violation parameters in B0→KS0KS0KS0 decays at Belle

Author: R. Mizuk, C. Beleño, A. B. Kaliyar, L. Li Gioi, H. Miyata, Yongsun Kim, J. Li, J. Schueler, S. Uno, C. Schwanda, H. Ye, T. J. Moon, E. Won, A. K. Giri, K. Trabelsi, M. Masuda, G. B. Mohanty, K. Hayasaka, S. Pardi, L. Cao, M. Z. Wang, K. Kinoshita, S. Cunliffe, Seok Kim, Y. Guan, M. Shapkin, M. C. Chang, C.-L. Hsu, M. Takizawa, Y. Yusa, Z. P. Zhang, Peter Kodys, W. W. Jacobs, M. Röhrken, V. Babu, P. Goldenzweig, H. Ono, K. Chilikin, A. Garmash, Daniel Greenwald, G. Karyan, A. Sangal, G.V. Russo, T. Aushev, G. Schnell, C. MacQueen, H. Nakazawa, A. M. Bakich, J. E. Fast, B. G. Cheon, J. K. Ahn, S. Sandilya, L. E. Piilonen, G. Pakhlova, P. Oskin, R. Kulasiri, W. S. Hou, T. Ferber, M. Nayak, D. Matvienko, R. B. Garg, A. J. Schwartz, Z. Doležal, K. Sumisawa, M. Merola, Motoki Iwasaki, D. M. Asner, Alexei Kuzmin, D. Y. Kim, Ya-Qiu Jin, M. Starič, Y. Ushiroda, N. Gabyshev, D. Červenkov, B. G. Fulsom, Bruce Yabsley, P. K. Behera, V. Vorobyev, Jyoti Prakash Biswal, Seema Bahinipati, T. E. Browder, T. V. Dong, Y. Choi, Seokhee Park, L. Santelj, K. H. Kang, Y. Unno, R. Pestotnik, M. Campajola, T. Bilka, J. H. Yin, S. Korpar, Seongbae Yang, I. Adachi, K.-H. Kim, W. Sutcliffe, Y. Onuki, V. Gaur, W. B. Yan, H. Hayashii, O. Hartbrich, N. Dash, G. De Nardo, M. Mrvar, C. H. Kim, F. Tenchini, V. Savinov, E.-J. Jang, Z. Natkaniec, T. Podobnik, T. Sumiyoshi, M. Nakao, Rahul Kumar, U. Tamponi, B. Golob, C. Kiesling, S. Ogawa, N. K. Nisar, M. Hernandez Villanueva, R. Mussa, T. Morii, Victoria Zhukova, T. Higuchi, Vladimir Popov, J. G. Shiu, Martin Ritter, H. B. Jeon, J. S. Lange, T. Sanuki, J. MacNaughton, J. Libby, A. Ishikawa, V.E. Shebalin, Y. Iwasaki, Y. J. Kwon, A. Chen, S. Jia, S. Nishida, V.N. Zhilich, E. Wang, V. M. Aulchenko, Z. S. Stottler, P. Križan, K. K. Joo, R. Ayad, N. Rout, Phillip Urquijo, M. Bračko, Doyen Sahoo, Y. Sakai, S. K. Choi, K. Lieret, X. L. Wang, Y. B. Li, T. Uglov, K. Miyabayashi, Kohei Ogawa, C. H. Wang, Y. Seino, M. T. Prim, S. Paul, J. V. Bennett, T. Mori, H. Aihara, Shoichi Watanuki, K. Inami, K. Nishimura, V. Chekelian, D. Cinabro, C. Z. Yuan, V. V. Zhulanov, E. Solovieva, G. Inguglia, E. Prencipe, S. Eidelman, X. P. Xu, M. Rozanska, D. Kotchetkov, P. Pakhlov, Shih-Chang Lee, Sudhanwa Patra, Samo Stanič, H. Park, A. Bozek, V. Bhardwaj, K. Tanida, T. K. Pedlar, H. Kichimi, R. Kroeger, M. E. Sevior, I. S. Lee, T. Matsuda, G. Bonvicini, A. Vinokurova, P. Krokovny, K. Cho, M. Uchida, L. K. Li, D. Liventsev, G. S. Varner, A. Rostomyan, P. Wang, M. V. Purohit, K. Senyo, T. Kawasaki, and S. Al Said
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Zero (complex analysis), Resonance, 01 natural sciences, law.invention, Standard Model, KEKB, law, 0103 physical sciences, CP violation, 010306 general physics, Collider
Abstract: We measure the time-dependent $C\!P$ violation parameters in $B^{0} \to K^{0}_{S}K^{0}_{S}K^{0}_{S}$ decays using $772 \times 10^6$ $B {\mkern 1.5mu\overline{\mkern-1.5mu B \mkern-0.1mu}\mkern 0.1mu}$ pairs collected at the $\Upsilon (4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The obtained mixing-induced and direct $C\!P$ asymmetries are $-0.71 \pm 0.23~{\rm(stat)} \pm 0.05~{\rm(syst)}$ and $0.12 \pm 0.16~{\rm(stat)} \pm 0.05~{\rm(syst)}$, respectively. These values are consistent with the Standard Model predictions. The significance of $C\!P$ violation differs from zero by 2.5 standard deviations.
Published: 2021

10. Search for a doubly charged DDK bound state in ϒ(1S, 2S) inclusive decays and via direct production in e+e− collisions at s=10.520 , 10.580, and 10.867 GeV

Author: R. Mussa, H. Miyata, Prafulla Kumar Behera, H. B. Jeon, A. Ishikawa, S. Al Said, H. Ye, M. Nakao, P. Križan, M. Uchida, Saraju P. Mohanty, Yongsun Kim, K. Lalwani, C. Schwanda, V. Bhardwaj, L. Santelj, S. Watanuki, Z. P. Zhang, M. Z. Wang, K. Kinoshita, C. Z. Yuan, E. Prencipe, G. S. Varner, R. Kulasiri, U. Tamponi, M. Shapkin, M. Röhrken, K. Chilikin, S. E. Vahsen, V.N. Zhilich, A. B. Kaliyar, W. Sutcliffe, M. Sumihama, D. Epifanov, S. Nishida, Martin Florian Bessner, J. Bennett, A. Rostomyan, P. Wang, B. G. Fulsom, Y. Iwasaki, J. G. Shiu, T. K. Pedlar, J. Schueler, G. Schnell, L. K. Li, K. Miyabayashi, R. Ayad, Seema Bahinipati, Jochen Dingfelder, W. B. Yan, Y. J. Kwon, V. Gaur, C. H. Wang, G. Pakhlova, R. Pestotnik, Dipak Kumar Sahoo, Seongbae Yang, C. W. Joo, Y. B. Li, K. Tanida, E. Won, L. Li Gioi, G. De Nardo, M. T. Hedges, N. Rout, S. Jia, T. Matsuda, S. Uno, Tagir Aushev, Y. Onuki, T. Kuhr, C. MacQueen, C. H. Li, M. Iwasaki, B. G. Cheon, M. Niiyama, Jyoti Prakash Biswal, A. Garmash, Andrey Sokolov, G. Bonvicini, A. Vinokurova, A. Natochii, T. Bilka, D. Y. Kim, K. Inami, Z. J. Liptak, R. Itoh, P. Krokovny, F. Tenchini, M. Campajola, K. Belous, S. Korpar, M. Watanabe, S. Sandilya, T. Podobnik, T. Sumiyoshi, Rakesh Kumar, K. H. Kang, K. Cho, S. C. Lee, F. Di Capua, Martin Ritter, Victoria Zhukova, B.A. Shwartz, I. Adachi, Semen Eidelman, A. Chen, T. Sanuki, S. Pardi, M. Starič, L. E. Piilonen, P. Oskin, H. Hayashii, E. Wang, L. Nayak, V. Babu, Vladimir Zhulanov, Y. Jin, T. Uglov, T. Ferber, R. Kroeger, Bruce Yabsley, M. E. Sevior, I. S. Lee, S. Cunliffe, P. Goldenzweig, J. Libby, D. M. Asner, K. Hayasaka, T. Mori, H. Aihara, M. C. Chang, G. Inguglia, Y. Guan, Tomoyuki Konno, K. Kumara, Y. Seino, M. T. Prim, Takeo Kawasaki, S.-J. Cho, Z. S. Stottler, D. Cinabro, P. Chang, M. Kumar, C. P. Shen, Seok Kim, M. Takizawa, Somnath Choudhury, D. Matvienko, Seokhee Park, John Yelton, Z. Doležal, K. Kim, H. Ono, S. K. Choi, M. Nayak, N. K. Nisar, J. S. Lange, R. Mizuk, T. Pang, S. Patra, Yoshinobu Unno, A. K. Giri, K. Sumisawa, M. Masuda, T. V. Dong, C.-L. Hsu, W. S. Hou, J. Li, C. Sharma, Peter Kodys, W. W. Jacobs, G. Karyan, V. Vorobyev, Y. Choi, V. Popov, Y. Sakai, O. Hartbrich, G. B. Mohanty, K. Lieret, K. K. Joo, N. Dash, E. Solovieva, X. P. Xu, S. Paul, D. Kotchetkov, B. Bhuyan, T. E. Browder, V. Savinov, R. Van Tonder, P. Pakhlov, G. Russo, H. Park, A. Bozek, Z. Natkaniec, D. Červenkov, J. H. Yin, S. Das, C. Kiesling, M. Bračko, A. Sangal, Rocky Bala Garg, M. Merola, K. Senyo, and C. Hadjivasiliou
Subjects: Physics, Direct production, Particle physics, KEKB, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Bound state, 010306 general physics, 01 natural sciences, Spectral line
Abstract: We report the results of a first search for a doubly charged DDK bound state, denoted the R++, in ϒ(1S) and ϒ(2S) inclusive decays and via direct production in e+e- collisions at s=10.520, 10.580, and 10.867 GeV. The search uses data accumulated with the Belle detector at the KEKB asymmetric-energy e+e- collider. No significant signals are observed in the D+Ds∗+ invariant-mass spectra of all studied modes. The 90% credibility level upper limits on their product branching fractions in ϒ(1S) and ϒ(2S) inclusive decays (B(ϒ(1S, 2S)→R+++anything)×B(R++→D+Ds∗+)), the product values of Born cross section and branching fraction in e+e- collisions (σ(e+e-→R+++anything)×B(R++→D+Ds∗+)) at s=10.520, 10.580, and 10.867 GeV under different assumptions of R++ masses varying from 4.13 to 4.17 GeV/c2 and widths varying from 0 to 5 MeV are obtained.
Published: 2020

11. Search for transitions from ϒ(4S) and ϒ(5S) to ηb(1S) and ηb(2S) with emission of an ω meson

Author: K. Miyabayashi, W. B. Yan, Jyoti Prakash Biswal, A. Garmash, P. Goldenzweig, C.-L. Hsu, L. Nayak, Seongbae Yang, S. Pardi, T. Aushev, S. Sandilya, U. Tamponi, H. Nakazawa, Peter Kodys, Vladimir Popov, M. Campajola, W. W. Jacobs, T. Ferber, V. Gaur, R. Mussa, G. Schnell, M. Niiyama, S. Jia, T. Matsuda, Deepak Kumar Sahoo, M. Starič, D. M. Asner, A. B. Kaliyar, P. K. Behera, H. Ono, X. P. Xu, H. Aihara, A. Ishikawa, M. Nakao, T. Iijima, G. Karyan, C. W. Joo, D. Kotchetkov, G. Bonvicini, Motoki Iwasaki, F. Tenchini, C. Hadjivasiliou, J. Schueler, A. Vinokurova, S. Dubey, V. Aulchenko, P. Krokovny, Kohei Ogawa, Bruce Yabsley, S. E. Vahsen, T. J. Moon, A. Natochii, P. Oskin, S. K. Choi, Y. Onuki, P. Križan, R. Mizuk, T. Podobnik, Y. Sakai, K. Inami, S. Ogawa, Y. Iwasaki, F. Di Capua, K. H. Kang, K. Cho, D. Epifanov, Soumya D. Mohanty, E. Won, C. H. Wang, S. Paul, L. Li Gioi, M. Nayak, Y. J. Kwon, K. Kumara, E. Wang, E. Waheed, M. Hernandez Villanueva, V. Bhardwaj, T. K. Pedlar, H. Ye, C. Z. Yuan, E. Prencipe, K. Lieret, C. H. Li, T. Sanuki, S. Wehle, R. Dhamija, N. Rout, Z. S. Stottler, J. Libby, Ya-Qiu Jin, Victoria Zhukova, L. K. Li, D. Liventsev, A. K. Giri, M. Z. Wang, K. Kinoshita, D. Y. Kim, Y. Unno, T. Uglov, A. Chen, E. Solovieva, K. Trabelsi, A. Sangal, J. H. Yin, G. S. Varner, M. Shapkin, C. P. Shen, Z. P. Zhang, S. Cunliffe, Martin Florian Bessner, Y. Seino, M. Masuda, R. Kroeger, K. Chilikin, M. Takizawa, G. B. Mohanty, R. Ayad, M. E. Sevior, M. T. Prim, M. Merola, R. Itoh, H. Miyata, K. Sumisawa, G. De Nardo, M. T. Hedges, A. Rostomyan, K. Tanida, P. Wang, Shoichi Watanuki, K. Gudkova, L. Cao, H. Atmacan, Rahul Kumar, D. Cinabro, R. Pestotnik, John Yelton, Z. Doležal, Andrey Sokolov, B. Golob, T. V. Dong, H. Kichimi, Y. Choi, Z. J. Liptak, T. Hara, L. Santelj, L. E. Piilonen, J. Wiechczynski, N. K. Nisar, T. Bilka, Seokhee Park, H. Hayashii, G. Pakhlova, Yongsun Kim, S. Uno, C. Schwanda, R. Kulasiri, P. Chang, O. Hartbrich, C. H. Kim, H. E. Cho, M. Watanabe, J. C. Dingfelder, J. S. Lange, K. Senyo, T. Pang, J. V. Bennett, T. Mori, Y. Usov, Semen Eidelman, Y. Yusa, G.V. Russo, Somnath Choudhury, W. S. Hou, Felix Metzner, V. Vorobyev, K. K. Joo, B. G. Cheon, K. Belous, S. Korpar, S. C. Lee, J. G. Shiu, S. Nishida, V. Chekelian, R. Van Tonder, R. B. Garg, B. Bhuyan, B. G. Fulsom, T. E. Browder, V. Savinov, P. Pakhlov, Philip Lewis, H. Park, A. Bozek, C. Kiesling, M. Bračko, N. Gabyshev, D. Červenkov, V.N. Zhilich, and D. Ferlewicz
Subjects: Physics, Particle physics, KEKB, Meson, 010308 nuclear & particles physics, law, 0103 physical sciences, 010306 general physics, Collider, 01 natural sciences, Belle experiment, law.invention
Abstract: Using data collected in the Belle experiment at the KEKB asymmetric-energy e+e− collider we search for transitions Υ(4S)→ η$_{b}$(1S)ω, Υ(5S)→η$_{b}$(1S)ω and Υ(5S)→η$_{b}$(2S)ω. No significant signals are observed and we set 90% confidence level upper limits on the corresponding visible cross sections: 0.2 pb, 0.4 pb and 1.9 pb, respectively.
Published: 2020

12. Study of electromagnetic decays of orbitally excited Ξc baryons

Author: X. L. Wang, V. Chekelian, R. Van Tonder, M. Shapkin, J. K. Ahn, P. Pakhlov, K. Chilikin, G. Russo, H. Park, A. Bozek, P. Lewis, M. Uchida, J. Libby, D. M. Asner, C. MacQueen, C.-L. Hsu, B. Bhuyan, T. E. Browder, V. Savinov, K. Hayasaka, V. Bhardwaj, R. Ayad, Seema Bahinipati, Tagir Aushev, Y. Onuki, D. Epifanov, N. K. Nisar, G. S. Varner, J. S. Lange, S. Sandilya, J. B. Singh, E. Won, R. Pestotnik, Peter Kodys, T. J. Moon, W. W. Jacobs, S. K. Choi, T. K. Pedlar, X. P. Xu, D. Kotchetkov, Y. Seino, M. T. Prim, S. Al Said, M. Starič, A. Rostomyan, G. Schnell, T. Iijima, D. Y. Kim, C. W. Joo, S.-J. Cho, K. Kumara, M. Campajola, L. K. Li, P. Wang, B. G. Fulsom, Saraju P. Mohanty, Takeo Kawasaki, V.N. Zhilich, Y. Kato, S. Pardi, C. P. Shen, G. Karyan, G. De Nardo, Seok Kim, M. T. Hedges, A. B. Kaliyar, Seongbae Yang, M. Takizawa, F. Di Capua, W. Sutcliffe, A. Kuzmin, S. E. Vahsen, I. Adachi, Victoria Zhukova, Yongsun Kim, Z. S. Stottler, K. K. Joo, M. Merola, V. Babu, J. Schueler, R. Kulasiri, K. Lalwani, A. Chen, M. Sumihama, John Yelton, Z. Doležal, S. Jia, K. Lieret, Y. Choi, R. Mizuk, C. Schwanda, K. Miyabayashi, Y. Iwasaki, G. Inguglia, Y. J. Kwon, T. Ferber, V. Popov, T. Matsuda, S. Uno, L. Santelj, S. Ogawa, C. Beleño, K. Senyo, G. Bonvicini, M. Hernandez Villanueva, Shih-Chang Lee, E. Nakano, V. Gaur, Y. Sakai, S. Patra, A. Vinokurova, O. Hartbrich, H. Hayashii, E. Waheed, D. Matvienko, N. Rout, Bruce Yabsley, E. Solovieva, H. Ono, W. S. Hou, S. Nishida, G. B. Mohanty, B. H. Kim, P. Krokovny, Rakesh Kumar, Seokhee Park, M. Nayak, A. K. Giri, K. Sumisawa, K. H. Kang, K. Cho, H. Miyata, Prafulla Kumar Behera, W. B. Yan, V. Vorobyev, S.I. Eidelman, M. Z. Wang, K. Kinoshita, M. Masuda, E. Prencipe, T. V. Dong, Y. Unno, J. Bennett, Dipak Kumar Sahoo, Kohei Ogawa, A. Natochii, K. Inami, V.E. Shebalin, M. Iwasaki, B. G. Cheon, R. Itoh, S. Korpar, J. G. Shiu, Phillip Urquijo, Y. B. Li, Jyoti Prakash Biswal, J. F. Strube, E. Wang, Z. P. Zhang, G. Pakhlova, J. T. McNeil, T. Mori, H. Aihara, Y. Usov, M. Mrvar, A. Garmash, T. Sanuki, D. Liventsev, S. Cunliffe, M. C. Chang, F. Tenchini, T. Podobnik, T. Sumiyoshi, Martin Ritter, L. E. Piilonen, P. Oskin, L. Li Gioi, R. Mussa, A. Ishikawa, M. Nakao, P. Križan, Andrey Sokolov, Rocky Bala Garg, C. Hadjivasiliou, Z. Natkaniec, N. Gabyshev, D. Červenkov, J. H. Yin, C. Kiesling, M. Bračko, T. Bilka, M. Watanabe, U. Tamponi, C. H. Wang, S. Paul, H. Ye, Tao Luo, K. Tanida, D. Cinabro, H. Kichimi, P. Chang, Z. J. Liptak, B.A. Shwartz, Vladimir Zhulanov, Y. Jin, T. Uglov, R. Kroeger, M. E. Sevior, P. Goldenzweig, and Somnath Choudhury
Subjects: Physics, Quark, Particle physics, 010308 nuclear & particles physics, 01 natural sciences, Measure (mathematics), law.invention, Charmed baryons, Baryon, KEKB, law, Excited state, 0103 physical sciences, 010306 general physics, Collider
Abstract: Using 980 fb−1 of data collected with the Belle detector operating at the KEKB asymmetric-energy eþe− collider, we report a study of the electromagnetic decays of excited charmed baryons Ξcð2790Þ and Ξcð2815Þ. A clear signal (8.6 standard deviations) is observed for Ξcð2815Þ0 → Ξ0 cγ, and we measure: B½Ξcð2815Þ0 → Ξ0 cγ B½Ξcð2815Þ0 → Ξcð2645Þþπ− → Ξ0 cπþπ− ¼ 0.41 0.05 0.03. We also present evidence (3.8 standard deviations) for the similar decay of the Ξcð2790Þ0 and measure: B½Ξcð2790Þ0 → Ξ0 cγ B½Ξcð2790Þ0 → Ξ0þ c π− → Ξþ c γπ− ¼ 0.13 0.03 0.02. The first quoted uncertainties are statistical and the second systematic. We find no hint of the analogous decays of the Ξcð2815Þþ and Ξcð2790Þþ baryons and set upper limits at the 90% confidence level of: B½Ξcð2815Þþ → Ξþ c γ B½Ξcð2815Þþ → Ξcð2645Þ0πþ → Ξþ c π−πþ < 0.09, and B½Ξcð2790Þþ → Ξþ c γ B½Ξcð2790Þþ → Ξ00 c πþ → Ξ0 cγπþ < 0.06. Approximate values of the partial widths of the decays are extracted, which can be used to discriminate between models of the underlying quark structure of these excited states.
Published: 2020

13. Dalitz analysis of D0→K−π+η decays at Belle

Author: J. E. Fast, A. Garmash, Y. Iwasaki, Y. J. Kwon, T. Bilka, M. Watanabe, X. P. Xu, S. Eidelman, O. Schneider, N. Rout, A. Rabusov, Shih-Chang Lee, P. K. Behera, W. Sutcliffe, S. Jia, H. Aihara, K. Senyo, P. Pakhlov, T. Uglov, V. M. Aulchenko, C. H. Wang, T. Kawasaki, S. Paul, Seongbae Yang, M. Sumihama, Mikihiko Nakao, P. Goldenzweig, Motoki Iwasaki, L. Li Gioi, Y. Q. Chen, H. Park, A. Bozek, M. Shapkin, Vladimir Popov, Sudhanwa Patra, Andrey Sokolov, G. Schnell, J. Libby, J. H. Yin, H. Ye, E.-J. Jang, S. Ogawa, P. Krokovny, B. G. Cheon, M. Uchida, D. Liventsev, V. Babu, V.N. Zhilich, D. Ferlewicz, T. Aushev, K. H. Kang, K. Cho, Y. Sakai, M. Röhrken, K. Chilikin, H. Ono, G. S. Varner, M. Starič, V. V. Zhulanov, E. Waheed, T. Kuhr, K. Lieret, Z. Natkaniec, L. K. Li, D. Epifanov, M. Z. Wang, K. Kinoshita, Soumya D. Mohanty, R. Itoh, T. Ferber, P. Wang, Seema Bahinipati, B. Golob, T. V. Dong, S. Korpar, Y. Choi, K. Miyabayashi, Y. Seino, I. Badhrees, E. Solovieva, G. De Nardo, F. Di Capua, D. Y. Kim, N. Dash, M. Mrvar, V. Bhardwaj, T. K. Pedlar, J. S. Lange, J. G. Shiu, M. T. Prim, C. MacQueen, T. D. Kimmel, Phillip Urquijo, D. M. Asner, R. Mussa, H. B. Jeon, A. Ishikawa, A. J. Schwartz, P. Križan, Y. B. Li, G.V. Russo, D. Cinabro, R. Pestotnik, R. Kroeger, K. Trabelsi, M. E. Sevior, I. S. Lee, Seok Kim, G. Inguglia, M. Campajola, W. S. Hou, O. Hartbrich, C. Z. Yuan, E. Prencipe, Alexei Kuzmin, V. Vorobyev, Somnath Choudhury, Victoria Zhukova, M. Merola, K. Inami, S. Pardi, A. Chen, J. Schueler, E. Won, Y. Yusa, H. Hayashii, H. Atmacan, F. Tenchini, R. Ayad, Z. S. Stottler, T. Podobnik, T. Sumiyoshi, Martin Ritter, K. Tanida, I. Adachi, T. Sanuki, L. E. Piilonen, G. Pakhlova, P. Oskin, R. Kulasiri, D. Matvienko, K. K. Joo, S. Cunliffe, Y. Guan, M. C. Chang, K. Hayasaka, H. E. Cho, R. B. Garg, B. G. Fulsom, T. E. Browder, V. Savinov, S. Nishida, V. Chekelian, J. V. Bennett, Z. P. Zhang, Jyoti Prakash Biswal, R. Mizuk, V. Gaur, Deepak Kumar Sahoo, J. MacNaughton, E. Wang, S. Al Said, A. K. Giri, K. Lalwani, S. Uno, C. Schwanda, M. Masuda, M. Nayak, L. Cao, Ya-Qiu Jin, C.-L. Hsu, Peter Kodys, W. W. Jacobs, Rahul Kumar, V.E. Shebalin, G. Karyan, W. Yan, S. K. Choi, M. Takizawa, Z. Doležal, N. Gabyshev, D. Červenkov, and M. Bračko
Subjects: Physics, Particle physics, KEKB, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Dalitz plot, 010306 general physics, 01 natural sciences
Abstract: We present the results of the first Dalitz plot analysis of the decay D0→K-π+η. The analysis is performed on a data set corresponding to an integrated luminosity of 953 fb-1 collected by the Belle detector at the asymmetric-energy e+e- KEKB collider. The Dalitz plot is well described by a combination of the six resonant decay channels K∗(892)0η, K-a0(980)+, K-a2(1320)+, K∗(1410)0η, K∗(1680)-π+ and K2∗(1980)-π+, together with Kπ and Kη S-wave components. The decays K∗(1680)-→K-η and K2∗(1980)-→K-η are observed for the first time. We measure ratio of the branching fractions, B(D0→K-π+η)B(D0→K-π+)=0.500±0.002(stat)±0.020(syst)±0.003(BPDG). Using the Dalitz fit result, the ratio B(K∗(1680)→Kη)B(K∗(1680)→Kπ) is measured to be 0.11±0.02(stat)-0.04+0.06(syst)±0.04(BPDG); this is much lower than the theoretical expectations (≈1) made under the assumption that K∗(1680) is a pure 13D1 state. The product branching fraction B(D0→[K2∗(1980)-→K-η]π+)=(2.2-1.9+1.7)×10-4 is determined. In addition, the πη′ contribution to the a0(980)± resonance shape is confirmed with 10.1σ statistical significance using the three-channel Flatte model. We also measure B(D0→K∗(892)0η)=(1.41-0.12+0.13)%. This is consistent with, and more precise than, the current world average (1.02±0.30)%, deviates with a significance of more than 3σ from the theoretical predictions of (0.51-0.92)%.
Published: 2020

14. Measurement of R(D) and R(D*) with a Semileptonic Tagging Method

Author: A. K. Giri, M. Masuda, S. E. Vahsen, T. V. Dong, K. Chilikin, Tagir Aushev, P. K. Resmi, C.-L. Hsu, C. Beleño, V. Zhukova, K. Trabelsi, Peter Kodys, W. W. Jacobs, S. Di Carlo, G. Karyan, Y. Onuki, A. M. Bakich, N. Dash, Y. Iwasaki, Y. J. Kwon, M. Iwasaki, T. J. Moon, K. Nakamura, Soumen Paul, H. Ono, B. G. Cheon, R. Mussa, Felix Metzner, O. Schneider, H. B. Jeon, F. Di Capua, G. Schnell, M. Rozanska, N. Gabyshev, D. Červenkov, B. G. Fulsom, Jyoti Prakash Biswal, A. Ishikawa, J. Schueler, A. Rabusov, M. Z. Wang, K. Kinoshita, P. Pakhlov, B. Bhuyan, K. K. Joo, Y. Seino, M. Nakao, Toru Iijima, J. Bennett, S. Sandilya, Seokhee Park, J. F. Krohn, E. Won, R. Pestotnik, S. Nishida, Iki Adachi, J. K. Lee, S. Korpar, Y. Choi, K. J. Nath, T. Kuhr, S. C. Lee, D. Kotchetkov, T. Matsuda, Doo Young Kim, G. De Nardo, M. Bračko, V. Babu, T. Sumiyoshi, T. K. Pedlar, Y. Sakai, Rocky Bala Garg, M. Nayak, Martin Ritter, M. Uchida, P. L. Wang, H. Atmacan, Y. Guan, R. Cheaib, L. K. Li, Leo Piilonen, A. Vossen, T. Ferber, V. Savinov, B.A. Shwartz, W. Sutcliffe, H. J. Kim, K. Cho, A. Chen, Phillip Urquijo, Seema Bahinipati, T. Sanuki, A. Garmash, H. Aihara, Hitoshi Yamamoto, Z. S. Stottler, K. Nishimura, Z. Doležal, Y. B. Li, T. Pang, G. B. Mohanty, M. Starič, Frank Simon, D. Liventsev, C. H. Kim, Vladimir Popov, Vladimir Zhulanov, P. Križan, R. Itoh, R. Kroeger, M. E. Sevior, I. S. Lee, V. Shebalin, S. Patra, G.V. Russo, Kevin Varvell, F. Tenchini, D. Joffe, M. Takizawa, P. Goldenzweig, E. Waheed, C. Z. Yuan, Tao Luo, K. Tanida, M. T. Prim, J. G. Shiu, K. T. Kim, W. S. Hou, K. Lieret, P. Oskin, O. Hartbrich, M. Merola, Pavel Krokovny, T. Uglov, D. Matvienko, J. Wiechczynski, T. Mori, D. Greenwald, S. H. Kim, Y. Usov, H. Hayashii, G. Pakhlova, N. K. Nisar, Rakesh Kumar, H. Park, A. Bozek, Dipak Kumar Sahoo, Luka Santelj, K. Senyo, K. H. Kang, J. H. Yin, L. Li Gioi, Z. P. Zhang, Kohei Ogawa, X. L. Wang, E. Solovieva, V. Chekelian, R. Van Tonder, A. B. Kaliyar, K. Inami, D. Epifanov, J. S. Lange, S. Cunliffe, B. Pal, Seongbae Yang, C. MacQueen, H. Ye, A. J. Schwartz, H. Kichimi, Takeo Higuchi, M. Campajola, V.N. Zhilich, D. Ferlewicz, V. Gaur, K. Miyabayashi, I. Badhrees, E. Prencipe, G. Caria, G. Varner, U. Tamponi, S. Al Said, S. Jia, Y. Jin, O. Grzymkowska, C. H. Wang, T. Bilka, T. E. Browder, S. Uno, C. Schwanda, D. Cinabro, J. Libby, D. M. Asner, K. Hayasaka, Takeo Kawasaki, Shoichi Watanuki, Prafulla Kumar Behera, Bo Wang, H. E. Cho, Andrey Sokolov, G. Inguglia, P. Chang, James E. Fast, Somnath Choudhury, and Semen Eidelman
Subjects: Physics, Semileptonic decay, Particle physics, Muon, Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, General Physics and Astronomy, 01 natural sciences, Standard Model, KEKB, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Bar (unit), Lepton
Abstract: The experimental results on the ratios of branching fractions $\mathcal{R}(D) = {\cal B}(\bar{B} \to D \tau^- \bar{\nu}_{\tau})/{\cal B}(\bar{B} \to D \ell^- \bar{\nu}_{\ell})$ and $\mathcal{R}(D^*) = {\cal B}(\bar{B} \to D^* \tau^- \bar{\nu}_{\tau})/{\cal B}(\bar{B} \to D^* \ell^- \bar{\nu}_{\ell})$, where $\ell$ denotes an electron or a muon, show a long-standing discrepancy with the Standard Model predictions, and might hint to a violation of lepton flavor universality. We report a new simultaneous measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^*)$, based on a data sample containing $772 \times 10^6$ $B\bar{B}$ events recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+ e^-$ collider. In this analysis the tag-side $B$ meson is reconstructed in a semileptonic decay mode and the signal-side $\tau$ is reconstructed in a purely leptonic decay. The measured values are $\mathcal{R}(D)= 0.307 \pm 0.037 \pm 0.016$ and $\mathcal{R}(D^*) = 0.283 \pm 0.018 \pm 0.014$, where the first uncertainties are statistical and the second are systematic. These results are in agreement with the Standard Model predictions within $0.2$, $1.1$ and $0.8$ standard deviations for $\mathcal{R}(D)$, $\mathcal{R}(D^*)$ and their combination, respectively. This work constitutes the most precise measurements of $\mathcal{R}(D)$ and $\mathcal{R}(D^*)$ performed to date as well as the first result for $\mathcal{R}(D)$ based on a semileptonic tagging method.
Published: 2020

15. Search for an Invisibly Decaying Z′ Boson at Belle II in e+e−→μ+μ−(e±μ∓) Plus Missing Energy Final States

Author: I. Ripp-Baudot, F. Meggendorfer, V.N. Zhilich, D. Ferlewicz, E. Nakano, G.V. Russo, N. Akopov, S. Nishida, S. Longo, H. M. Wakeling, A. Pathak, M. De Nuccio, Rocky Bala Garg, L. Cao, Nataliia Kovalchuk, B. Spruck, T. J. Moon, T. Iijima, Soumen Paul, Dipak Kumar Sahoo, C. Kleinwort, K. Kumara, S. Fiore, W. B. Yan, Bumho Kim, C. W. Joo, K. Chilikin, Takeo Higuchi, Felix Metzner, Z. S. Stottler, P. Sartori, G. De Pietro, K. Miyabayashi, L. Zani, C. Wessel, N. K. Nisar, M. Bessner, C. Miller, C. Niebuhr, V. Babu, Abner Soffer, B. Scavino, E. Graziani, E. De La Cruz-Burelo, Elisa Manoni, Yang Chen, S. Reiter, R. Peschke, S. Sandilya, H. Windel, Carlos Marinas, M. Wakai, Marco Milesi, J. Baudot, C. Hadjivasiliou, Yoshinobu Unno, C. Hearty, T. Kuhr, H. G. Moser, I. Komarov, M. Bertemes, M. Nishimura, T. V. Dong, N. Taniguchi, J. H. Yin, U. Tamponi, Antonio Budano, Iki Adachi, Doo Young Kim, Agnese Martini, T. Ferber, A. K. Giri, Z. P. Zhang, V. Gaur, L. B. Rizzuto, T. Sumiyoshi, K. K. Joo, R. Godang, J. C. Mei, B. Paschen, S. Bussino, T. K. Pedlar, Soohyun Cho, S. Kurz, Tariq Aziz, Kohei Ogawa, K. Dort, S. Marcello, L. Corona, Prafulla Kumar Behera, Leo Piilonen, P. Taras, K. Azmi, Martin Ritter, Dmytro Levit, M. Masuda, B. Golob, L. Santelj, J. Gemmler, G. Casarosa, S. Wehle, M. Hernandez Villanueva, K. Inami, A. Vossen, G. Dujany, E. C. Hill, V. Aushev, J. S. Lange, A. Paladino, T. Czank, F. Dattola, T. D. Kimmel, S. Dey, D. Biswas, K. Nishimura, Frank Simon, S. E. Vahsen, A. B. Kaliyar, C. Rosenfeld, R. M. Seddon, A. Hershenhorn, A. Fodor, M. Remnev, A. Sangal, Vladimir Popov, J. Schueler, H. Park, A. Bozek, Kiyoshi Tanida, Sw. Banerjee, Felix Mueller, L. K. Li, M. Merola, S. Jia, Y. Iwasaki, Y. Sakai, E. Paoloni, L. Burmistrov, Pavel Krokovny, D. Dossett, P. K. Resmi, C.-L. Hsu, Y. J. Kwon, G. Finocchiaro, A. Panta, K. Lieret, S. Lacaprara, I. Domínguez Jiménez, R. Cheaib, Tagir Aushev, Seongbae Yang, J. Irakkathil Jabbar, Q. Y. Liu, S. Cunliffe, Makoto Tabata, Jakub Kandra, Andreas Warburton, Jürgen Becker, S. Yamada, E. Prencipe, Z. Doležal, N. Rout, V. Zhukova, Y. Onuki, Xiaopeng Zhou, A. De Yta-Hernandez, D. Červenkov, G. B. Mohanty, Alberto Aloisio, Y. Kato, G. Varner, J. F. Strube, M. C. Chang, M. Z. Wang, Peter Kodys, W. W. Jacobs, B. G. Fulsom, Y. Yusa, M. Nayak, B. Oberhof, T. Koga, A. Passeri, C. P. Shen, Y. Kim, P. Branchini, J. Bennett, M. Takizawa, T. Matsuda, K. Senyo, Enrico Bernieri, G. Karyan, L. Lanceri, S. K. Choi, S. Baehr, P. Gomis, Yi Fan Hu, Florian Urs Bernlochner, F. Di Capua, Shuji Tanaka, H. Aihara, E. Solovieva, G. Muroyama, S. Duell, I. M. Peruzzi, P. Oskin, M. Maggiora, Kevin Varvell, H. Atmacan, S. Y. Suzuki, K. Lautenbach, Pere Rados, G. Rizzo, M. Bračko, G. Pakhlova, Y.-T. Chen, M. Destefanis, M. Piccolo, W. Gradl, Y. Onishchuk, Y. Jin, C. H. Wang, D. Greenwald, A. Vinokurova, J. G. Shiu, S. Dubey, I. Heredia-De La Cruz, D. E. Jaffe, S. Bettarini, F. Müller, S. Spataro, O. Hartbrich, H. Ozaki, K. Cho, H. Miyake, K. Trabelsi, S. H. Kim, Y. Guan, K. Unger, P. Pakhlov, M. Eliachevitch, Rakesh Kumar, A. Kuzmin, V. Savinov, T. M. G. Kraetzschmar, F. Bianchi, C. Z. Yuan, M. Campajola, F. Tenchini, Th. Müller, A. Sibidanov, Yukinori Sato, E. Won, R. A. Briere, S. H. Robertson, R. Pestotnik, Kodai Matsuoka, M. Hoek, E. J. Jang, R. Rasheed, V. Chekelian, D. Rodríguez Pérez, K. Kim, H. Hayashii, H. Ono, R. Van Tonder, H. Ye, M. Barrett, R. Mizuk, L. Li Gioi, Y. B. Li, C. H. Kim, G. De Nardo, M. T. Hedges, Yongsun Kim, B. Gobbo, P. Leitl, Hidekazu Kakuno, Concettina Sfienti, S. Uno, R. Stroili, B. G. Cheon, C. Schwanda, L. M. Cremaldi, D. Cinabro, E. Torassa, Claudia Cecchi, M. V. Purohit, S. Korpar, S. C. Lee, T. Hara, F. Forti, T. Geßler, M. Garcia-Hernandez, E. Ganiev, S. Halder, J. M. Roney, M. Yonenaga, M. Sumihama, M. Watanabe, T. E. Browder, H. Kindo, C. Praz, P. Bambade, J. Libby, D. M. Asner, K. Hayasaka, M. T. Prim, Takeo Kawasaki, Andrey Sokolov, A. Gaz, James E. Fast, Semen Eidelman, J. Kahn, F. Meier, R. Mussa, H. B. Jeon, Bruce Yabsley, S. Stefkova, R. Giordano, G. Inguglia, A. Ishikawa, G. Nazaryan, Y. Seino, M. Kumar, M. Nakao, Somnath Choudhury, P. Križan, S. Kohani, Y. Ushiroda, M. Uchida, Tao Luo, A. Gellrich, Y. Maeda, T. Tsuboyama, D. Matvienko, Q. D. Zhou, J. Wiechczynski, C. La Licata, B.A. Shwartz, M. Starič, D. Liventsev, T. Morii, R. Kroeger, I. S. Lee, P. Goldenzweig, N. Anh Ky, R. de Sangro, Z. Liptak, P. Ahlburg, W. A. T. Wan Abdullah, D. J. Summers, R. Itoh, A. Rostomyan, R. J. Sobie, John Webb, L. Vitale, J. Kumar, D. Neverov, A. Selce, and Vikas Bansal
Subjects: Physics, Coupling constant, Particle physics, Missing energy, Physics beyond the Standard Model, General Physics and Astronomy, 01 natural sciences, law.invention, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, Boson
Abstract: Theories beyond the standard model often predict the existence of an additional neutral boson, the Z′. Using data collected by the Belle II experiment during 2018 at the SuperKEKB collider, we perform the first searches for the invisible decay of a Z′ in the process e+e-→μ+μ-Z′ and of a lepton-flavor-violating Z′ in e+e-→e±μZ′. We do not find any excess of events and set 90% credibility level upper limits on the cross sections of these processes. We translate the former, in the framework of an Lμ-Lτ theory, into upper limits on the Z′ coupling constant at the level of 5×10-2-1 for MZ′≤6 GeV/c2.
Published: 2020

16. Study of B→pp¯ππ

Author: F. Di Capua, C. P. Shen, R. Kroeger, U. Tamponi, Seok Kim, M. E. Sevior, I. S. Lee, G. Bonvicini, H. Aihara, E. Nakano, A. Vinokurova, A. M. Bakich, K. Chu, R. Mizuk, C. H. Wang, S. Paul, P. Krokovny, V. Babu, D. M. Asner, T. Aushev, Seema Bahinipati, T. V. Dong, K. Cho, T. Ferber, J. E. Fast, Y. Choi, K. J. Nath, L. Li Gioi, H. Ye, C. Beleño, Tao Luo, L. Santelj, K. Chilikin, K. Kinoshita, J. Libby, K. Tanida, D. Epifanov, B. G. Cheon, Y.-T. Lai, V. Bhardwaj, T. K. Pedlar, N. Gabyshev, D. Červenkov, D. Y. Kim, G. Schnell, M. Nayak, M. Merola, J. V. Bennett, T. Mori, Y. Usov, O. Hartbrich, Y. Seino, T. Iijima, W. Sutcliffe, Ya-Qiu Jin, Y. Sakai, K. Lieret, S. Eidelman, D. Matvienko, J. Wiechczynski, P. Pakhlov, S. K. Choi, T. Uglov, S. Korpar, N. Dash, Y. Onuki, Seokhee Park, R. Pestotnik, M. T. Prim, J. G. Shiu, P. K. Resmi, C.-L. Hsu, Z. P. Zhang, H. Hayashii, K. Senyo, S. Uno, C. Schwanda, Meng Wang, Bo Wang, E. Solovieva, D. Cinabro, R. Mussa, H. B. Jeon, Jyoti Prakash Biswal, T. Kawasaki, H. Park, Phillip Urquijo, V. M. Aulchenko, K. Hayasaka, A. Bozek, L. K. Li, Y. Yusa, A. Bobrov, D. Liventsev, A. Ishikawa, V. Gaur, Z. S. Stottler, A. Frey, Peter Kodys, W. W. Jacobs, E. Prencipe, M. Nakao, Victoria Zhukova, M. Takizawa, P. Chang, D. Joffe, H. E. Cho, G. S. Varner, A. Chen, Seongbae Yang, S. Di Carlo, G. Karyan, R. Itoh, P. Križan, A. Vossen, John Yelton, Z. Doležal, Motoki Iwasaki, A. Rostomyan, P. Wang, S. Nishida, Somnath Choudhury, K. Inami, Vladimir Popov, S. Pardi, Doyen Sahoo, A. K. Giri, Shih-Chang Lee, M. Masuda, G. B. Mohanty, K. K. Joo, X. L. Wang, V. Chekelian, T. Nakano, L. Cao, K. Nishimura, V. V. Zhulanov, B. K. Pal, M. Bračko, R. B. Garg, B. Bhuyan, B. G. Fulsom, J. H. Yin, V. Savinov, B. Golob, N. K. Nisar, J. Schueler, C. W. Park, E. Won, T. Pang, G.V. Russo, W. S. Hou, A. Garmash, P. K. Behera, H. Ono, L. E. Piilonen, G. Pakhlova, P. Oskin, Y. Unno, R. Kulasiri, R. Ayad, Iki Adachi, S. Cunliffe, M. Campajola, V.N. Zhilich, S. Al Said, K. Miyabayashi, I. Badhrees, F. Tenchini, T. Sumiyoshi, Martin Ritter, Y. Iwasaki, Y. J. Kwon, O. Schneider, N. Rout, P. Goldenzweig, S. Sandilya, and M. Starič
Subjects: Physics, Research program, Higher education, 010308 nuclear & particles physics, business.industry, media_common.quotation_subject, Library science, 7. Clean energy, 01 natural sciences, Science research, Excellence, 0103 physical sciences, Christian ministry, Russian federation, 010306 general physics, China, business, Research center, media_common
Abstract: We thank the KEKB group for the excellent operation of the accelerator, the KEK cryogenics group for the efficient operation of the solenoid, the KEK computer group and the Pacific Northwest National Laboratory (PNNL) Environmental Molecular Sciences Laboratory (EMSL) computing group for strong computing support, and the National Institute of Informatics and Science Information NETwork 5 (SINET5) for valuable network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan, the Japan Society for the Promotion of Science (JSPS), and the Tau-Lepton Physics Research Center of Nagoya University; the Australian Research Council including Grants No. DP180102629, No. DP170102389, No. DP170102204, No. DP150103061, and No. FT130100303; the Austrian Science Fund (FWF); the National Natural Science Foundation of China under Contracts No. 11435013, No. 11475187, No. 11521505, No. 11575017, No. 11675166, and No. 11705209; the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS), Grant No. QYZDJ-SSW-SLH011; the CAS Center for Excellence in Particle Physics (CCEPP); the Shanghai Pujiang Program under Grant No. 18PJ1401000; the Ministry of Education, Youth and Sports of the Czech Republic under Contract No. LTT17020; the Carl Zeiss Foundation, the Deutsche Forschungsgemeinschaft, the Excellence Cluster Universe, and the VolkswagenStiftung; the Department of Science and Technology of India; the Istituto Nazionale di Fisica Nucleare of Italy; the National Research Foundation (NRF) of Korea under Grants No. 2015H1A2A1033649, No. 2016R1D1A1B01010135, No. 2016K1A3A7A09005 603, No. 2016R1D1A1B02012900, No. 2018R1A2B3003 643, No. 2018R1A6A1A06024970, and No. 2018R1D1 A1B07047294; the Radiation Science Research Institute, Foreign Large-size Research Facility Application Supporting project, the Global Science Experimental Data Hub Center of theKorea Institute of Science and Technology Information and KREONET/GLORIAD; the Polish Ministry of Science and Higher Education and the National Science Center; the Grant of the Russian Federation Government, Agreement No. 14.W03.31.0026; the Slovenian Research Agency; Ikerbasque, Basque Foundation for Science, Spain; the Swiss National Science Foundation; the Ministry of Education and the Ministry of Science and Technology of Taiwan; and the United States Department of Energy and the National Science Foundation.
Published: 2020

17. Search for B+→μ+νμ and B+→μ+N with inclusive tagging

Author: G. Schnell, T. Iijima, A. K. Giri, S. Eidelman, T. Kuhr, M. Masuda, P. Pakhlov, G. B. Mohanty, J. G. Shiu, H. Ono, Philip Lewis, L. Cao, H. Park, A. Bozek, Peter Kodys, G. De Nardo, G. Karyan, R. Mizuk, R. B. Garg, B. Bhuyan, B. G. Fulsom, T. E. Browder, Bo Wang, Rahul Kumar, C. Beleño, A. Garmash, D. Matvienko, K. Hayasaka, A. Bobrov, B. G. Cheon, V.E. Shebalin, H. E. Cho, Y. Choi, K. J. Nath, T. Hara, L. Santelj, V. Bansal, D. M. Asner, Florian Urs Bernlochner, C. Kiesling, V. Savinov, Jyoti Prakash Biswal, Andrey Sokolov, S. Al Said, J. Haba, M. Niiyama, F. Tenchini, P. Goldenzweig, Seokhee Park, A. B. Kaliyar, Shih-Chang Lee, S. Korpar, M. Bračko, P. K. Behera, S. Nishida, K. Senyo, J. K. Lee, V. Gaur, M. Heck, K. Nishimura, J. Schueler, E. Won, M. Nakao, Y. Unno, V. Babu, T. Aushev, M. Starič, Victoria Zhukova, V. V. Zhulanov, T. Kawasaki, J. MacNaughton, T. Sumiyoshi, L. Li Gioi, Martin Ritter, Jihwa Lee, E. Prencipe, M. Campajola, K. Lalwani, J. F. Strube, M. Uchida, T. Kumita, T. Matsuda, A. Chen, S. Uno, C. Schwanda, H. Atmacan, T. Ferber, S. Ogawa, V. Chekelian, R. Ayad, Felix Metzner, D. Liventsev, M. Merola, H. Hayashii, Z. P. Zhang, S. E. Vahsen, R. Van Tonder, B. K. Pal, Z. Natkaniec, G. S. Varner, L. E. Piilonen, C. H. Kim, B. Shwartz, K. K. Joo, K. Adamczyk, G. Pakhlova, R. Kulasiri, A. Rostomyan, P. Wang, D. Y. Kim, G.V. Russo, H. Ye, Y. Iwasaki, Y. J. Kwon, M. Z. Wang, M. Nayak, K. Kinoshita, Nils Braun, T. Uglov, K. Chilikin, V.N. Zhilich, Kevin Varvell, Sudhanwa Patra, Y. Yusa, Ya-Qiu Jin, A. Vinokurova, O. Schneider, Y. Tao, H. Aihara, Y. Usov, K. Miyabayashi, R. Mussa, P. C. Lu, W. S. Hou, A. Ishikawa, M. Sumihama, Alexei Kuzmin, A. M. Bakich, Motoki Iwasaki, Y. Ushiroda, K. Trabelsi, P. Križan, C. H. Li, I. Adachi, P. Krokovny, Seok Kim, J. E. Fast, M. Rozanska, Doyen Sahoo, D. Kotchetkov, W. Sutcliffe, Y. Onuki, D. Červenkov, K. Cho, S. Cunliffe, Y. Guan, V. M. Aulchenko, R. Pestotnik, D. Epifanov, T. Bilka, J. H. Yin, V. Bhardwaj, T. K. Pedlar, U. Tamponi, S. Jia, O. Grzymkowska, C. H. Wang, K. Inami, S. Paul, N. K. Nisar, Y. Sakai, J. S. Lange, K. Lieret, E. Solovieva, D. Joffe, Seongbae Yang, Frank Simon, Vladimir Popov, D. Cinabro, G. Inguglia, P. Chang, Somnath Choudhury, J. Libby, Y. Seino, M. T. Prim, Shoichi Watanuki, S. Pardi, M. Takizawa, Z. Doležal, K. T. Kim, R. Kroeger, M. E. Sevior, I. S. Lee, Tao Luo, and H. Kichimi
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, High Energy Physics::Phenomenology, Rest frame, Type (model theory), Coupling (probability), 01 natural sciences, Helicity, Standard Model, 0103 physical sciences, High Energy Physics::Experiment, B meson, Sensitivity (control systems), 010306 general physics
Abstract: We report the result for a search for the leptonic decay of B$^{+}$ → μ$^{+}$ν$_{μ}$ using the full Belle dataset of 711 fb$^{-1}$ of integrated luminosity at the ϒ(4S) resonance. In the Standard Model leptonic B-meson decays are helicity and Cabibbo-Kobayashi-Maskawa suppressed. To maximize sensitivity an inclusive tagging approach is used to reconstruct the second B meson produced in the collision. The directional information from this second B meson is used to boost the observed μ into the signal B-meson rest frame, in which the μ has a monochromatic momentum spectrum. Though its momentum is smeared by the experimental resolution, this technique improves the analysis sensitivity considerably. Analyzing the μ momentum spectrum in this frame we find B(B$^{+}$ → μ$^{+}$ν$_{μ}$) = 5.3 ± 2.0 ± 0.9) × 10$^{-7}$ with a one-sided significance of 2.8 standard deviations over the background-only hypothesis. This translates to a frequentist upper limit of B(B$^{+}$ → μ$^{+}$ν$_{μ}$) < 8.6 × 10$^{-7}$ at 90% confidence level. The experimental spectrum is then used to search for a massive sterile neutrino, B$^{+}$ → μ$^{+}$N, but no evidence is observed for a sterile neutrino with a mass in a range of 0–1.5 GeV. The determined B$^{+}$ → μ$^{+}$ν$_{μ}$ branching fraction limit is further used to constrain the mass and coupling space of the type II and type III two-Higgs-doublet models.
Published: 2020

18. Observation of a vector charmoniumlike state in e+e−→Ds+Ds1(2536)−+c.c

Author: D. Cinabro, G. Schnell, T. Iijima, Bumho Kim, Y. Choi, K. J. Nath, P. Chang, L. Santelj, T. Pang, S. Patra, P. Pakhlov, S. K. Choi, H. Hayashii, K. Tanida, A. M. Bakich, Y. Sakai, Rocky Bala Garg, N. Gabyshev, D. Červenkov, Samo Stanič, S. Nishida, Philip Lewis, Dipak Kumar Sahoo, T. Matsuda, S. Uno, A. Garmash, M. Nayak, H. Atmacan, K. Lieret, S. Pardi, W. S. Hou, H. Kichimi, G. Russo, H. Park, M. Takizawa, Victoria Zhukova, C. P. Shen, M. Bračko, A. Bozek, Y. Onuki, R. Mussa, A. Chen, G. Bonvicini, M. Uchida, Z. Doležal, V. Gaur, J. G. Shiu, Y. Iwasaki, A. Ishikawa, L. K. Li, Y. J. Kwon, V. Babu, K. Inami, E. Solovieva, V. Vorobyev, A. Vinokurova, O. Schneider, N. Rout, T. Bilka, Y. B. Li, V.M. Aulchenko, T. Ferber, R. Ayad, M. Watanabe, S. H. Kim, P. Krokovny, M. Z. Wang, K. Kinoshita, Soumen Paul, M. Röhrken, K. Chilikin, J. H. Yin, Vladimir Popov, B.A. Shwartz, G. S. Varner, J. Libby, D. M. Asner, K. Hayasaka, M. Iwasaki, Shih-Chang Lee, K. H. Kang, K. Cho, B. G. Cheon, Z. S. Stottler, B. Bhuyan, T. E. Browder, H. Ye, G. Pakhlova, S. Sandilya, D. Liventsev, Vladimir Zhulanov, C. H. Kim, Y. Jin, R. Itoh, B. Golob, K. Lalwani, R. Pestotnik, R. Kroeger, D. Epifanov, M. E. Sevior, I. S. Lee, P. Goldenzweig, C. Schwanda, A. Bobrov, M. Starič, A. Rostomyan, S. Korpar, Y. Seino, J. S. Lange, Andrey Sokolov, B. G. Fulsom, K. K. Joo, M. T. Prim, L. Li Gioi, F. Di Capua, D. Y. Kim, V. Savinov, T. K. Pedlar, W. Sutcliffe, K. Nishimura, D. Matvienko, S. Jia, R. Kulasiri, Seongbae Yang, James E. Fast, Seokhee Park, E. Won, V.N. Zhilich, C. H. Wang, I. Adachi, K. Miyabayashi, I. Badhrees, X. L. Wang, C. MacQueen, C. H. Li, R. Van Tonder, M. Campajola, G. Inguglia, H. Ono, R. Mizuk, H. Aihara, M. Niiyama, Y. Usov, Jyoti Prakash Biswal, C. Z. Yuan, E. Prencipe, F. Tenchini, T. Sumiyoshi, G. De Nardo, N. K. Nisar, Z. P. Zhang, S. Cunliffe, Yoshinobu Unno, L. E. Piilonen, P. Oskin, A. K. Giri, M. Masuda, T. V. Dong, L. Cao, C.-L. Hsu, K. Trabelsi, Peter Kodys, W. W. Jacobs, S. Di Carlo, G. Karyan, H. Miyata, Prafulla Kumar Behera, S.I. Eidelman, H. E. Cho, M. Merola, K. Senyo, T. Uglov, A. Kuzmin, and S. Ogawa
Subjects: Physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, State (functional analysis), 010306 general physics, 01 natural sciences
Abstract: Using a data sample of 921.9 fb-1 collected with the Belle detector, we study the process of e+e-→Ds+Ds1(2536)-+c.c. via initial-state radiation. We report the first observation of a vector charmoniumlike state decaying to Ds+Ds1(2536)-+c.c. with a significance of 5.9σ, including systematic uncertainties. The measured mass and width are (4625.9-6.0+6.2(stat)±0.4(syst)) MeV/c2 and (49.8-11.5+13.9(stat)±4.0(syst)) MeV, respectively. The product of the e+e-→Ds+Ds1(2536)-+c.c. cross section and the branching fraction of Ds1(2536)-→D¯*0K- is measured from the DsD¯s1(2536) threshold to 5.59 GeV.
Published: 2019

19. Measurements of the branching fractions B(B−→Λ¯c−Ξc′0) , B(B−→Λ¯c−Ξc(2645)0) and B(B−→Λ¯c−Ξc(2790)0)

Author: R. Mizuk, C. MacQueen, S. Pardi, S. Cunliffe, Andrey Sokolov, V. Babu, G. Schnell, T. Iijima, K. Nishimura, M. Z. Wang, K. Kinoshita, J. G. Shiu, Y. B. Li, M. Sumihama, T. Kuhr, F. Di Capua, H. Ono, M. Iwasaki, V. V. Zhulanov, J. E. Fast, T. Ferber, M. Campajola, Y. Sakai, B. G. Cheon, K. Lieret, S. Korpar, A. Garmash, S. Nishida, T. K. Pedlar, A. K. Giri, T. Bilka, S. K. Choi, Sudhanwa Patra, Shih-Chang Lee, Samo Stanič, X. L. Wang, L. E. Piilonen, M. Watanabe, M. Masuda, D. M. Asner, G. Pakhlova, P. Oskin, R. Kulasiri, M. Uchida, L. K. Li, Y. Iwasaki, E. Won, R. Mussa, Y. J. Kwon, E. Solovieva, H. Hayashii, M. Röhrken, K. Chilikin, C. H. Kim, H. Atmacan, R. Van Tonder, D. Liventsev, K. Tanida, K. Trabelsi, Z. S. Stottler, J. Libby, O. Schneider, N. Rout, P. K. Behera, A. Ishikawa, T. Matsuda, Y. Unno, B. Shwartz, R. B. Garg, L. Cao, A. Kuzmin, B. G. Fulsom, T. E. Browder, C. P. Shen, K. Lalwani, G. S. Varner, Seok Kim, S. Uno, Seongbae Yang, M. Niiyama, J. H. Yin, C. Schwanda, S. Ogawa, S. Jia, W. Sutcliffe, Y. Onuki, C.-L. Hsu, I. Adachi, R. Pestotnik, H. Kichimi, G. Bonvicini, M. Bračko, Vladimir Popov, A. Vinokurova, R. Itoh, A. Rostomyan, Y. Seino, V.N. Zhilich, B. Golob, C. Z. Yuan, V. M. Aulchenko, C. H. Wang, K. Inami, V. Savinov, Peter Kodys, W. W. Jacobs, N. K. Nisar, F. Tenchini, J. S. Lange, D. Ferlewicz, S. Eidelman, T. Podobnik, T. Sumiyoshi, C. H. Li, P. Goldenzweig, P. Krokovny, D. Matvienko, S. Sandilya, K. K. Joo, M. T. Prim, D. Y. Kim, S. Paul, L. Li Gioi, T. Pang, A. M. Bakich, Yang Li, E. Prencipe, H. Ye, P. Pakhlov, T. V. Dong, Victoria Zhukova, S. Di Carlo, Y. Choi, G.V. Russo, Philip Lewis, T. Uglov, K. H. Kang, K. Cho, M. Starič, Seokhee Park, G. Karyan, M. Nayak, K. J. Nath, I. Badhrees, W. S. Hou, D. Cinabro, R. Kroeger, M. E. Sevior, I. S. Lee, T. Hara, L. Santelj, G. Inguglia, N. Gabyshev, D. Červenkov, M. Takizawa, A. Chen, H. Park, A. Bozek, H. Miyata, M. Merola, Ya-Qiu Jin, John Yelton, P. Chang, Z. Doležal, R. Ayad, G. De Nardo, K. Senyo, K. Hayasaka, A. Bobrov, H. E. Cho, B. Grube, H. Aihara, Jyoti Prakash Biswal, V. Gaur, Deepak Kumar Sahoo, M. Nakao, and Z. P. Zhang
Subjects: Physics, 010308 nuclear & particles physics, Branching fraction, Analytical chemistry, Lambda, Branching (polymer chemistry), 01 natural sciences, Baryon, KEKB, Recoil, 0103 physical sciences, Mass spectrum, 010306 general physics, Bar (unit)
Abstract: Using the data sample of 711 fb-1 of ϒ(4S) on-resonance data taken by the Belle detector at the KEKB asymmetric-energy electron-positron collider, we present the first measurements of branching fractions of the decays B-→Λ¯c-Ξc′0, B-→Λ¯c-Ξc(2645)0, and B-→Λ¯c-Ξc(2790)0. The signal yields for these decays are extracted from the recoil mass spectrum of the system recoiling against Λ¯c- baryons in selected B- candidates. The branching fraction of B-→Λ¯c-Ξc(2790)0 is measured to be (1.1±0.4±0.2)×10-3, where the first uncertainty is statistical and the second is systematic. The 90% credibility level upper limits on B(B-→Λ¯c-Ξc′0) and B(B-→Λ¯c-Ξc(2645)0) are determined to be 6.5×10-4 and 7.9×10-4, respectively.
Published: 2019

20. Azimuthal asymmetries of back-to-back π±−(π0, η, π±) pairs in e+e− annihilation

Author: P. Pakhlov, P. Goldenzweig, Z. P. Zhang, Jyoti Prakash Biswal, V. Gaur, Deepak Kumar Sahoo, M. Nakao, T. Bilka, M. Starič, M. Watanabe, L. Li Gioi, S. Nishida, A. Garmash, H. Ye, V. Chekelian, Y. J. Kwon, V. Bhardwaj, T. K. Pedlar, S. Pardi, R. Van Tonder, B. K. Pal, O. Schneider, L. E. Piilonen, V.N. Zhilich, R. Mizuk, J. V. Bennett, H. Aihara, Y. Sakai, M. Uchida, W. Ostrowicz, B. G. Fulsom, B. G. Cheon, G. Pakhlova, T. Matsuda, S. Jia, V. Savinov, K. Lieret, D. Liventsev, H. Miyata, G. Schnell, Bo Wang, H. Ono, C. H. Wang, S. Paul, M. Merola, G. S. Varner, K. Miyabayashi, I. Badhrees, R. Itoh, P. Krokovny, K. Hayasaka, A. Bobrov, D. Y. Kim, P. Wang, D. Cinabro, D. M. Asner, K. H. Kang, K. Cho, S. Korpar, H. E. Cho, C. MacQueen, S. C. Lee, Motoki Iwasaki, Peter Kodys, W. W. Jacobs, E. Solovieva, Ya-Qiu Jin, Seok Kim, R. Seidl, Hui Li, J. Schueler, Z. Natkaniec, S. Di Carlo, J. G. Shiu, V. Babu, S. Cunliffe, Megumi Naruki, R. Kroeger, Somnath Choudhury, E. Won, T. Aushev, J. Libby, G. Karyan, K. Inami, K. Senyo, D. Kotchetkov, M. Campajola, R. Mussa, A. K. Giri, T. Ferber, V. M. Aulchenko, E.-J. Jang, Y. Seino, A. Ishikawa, Y. B. Li, M. Masuda, M. T. Prim, M. Z. Wang, G.V. Russo, Z. S. Stottler, P. Križan, L. Cao, F. Di Capua, F. Tenchini, Seongbae Yang, Tao Luo, K. Tanida, K. Huang, T. Uglov, A. Vossen, Frank Simon, Vladimir Popov, H. Hayashii, S. Uno, C. Schwanda, V. V. Zhulanov, T. Sanuki, Semen Eidelman, Victoria Zhukova, A. M. Bakich, A. Chen, D. Červenkov, E. Prencipe, Sudhanwa Patra, T. V. Dong, Y. Choi, K. J. Nath, L. Santelj, O. Hartbrich, M. Bračko, T. Nakano, M. Takizawa, and R. Pestotnik
Subjects: Physics, Quark, Particle physics, Annihilation, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, Thrust, 01 natural sciences, Belle experiment, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: This work reports the first observation of azimuthal asymmetries around the thrust axis in e+e- annihilation of pairs of back-to-back charged pions in one hemisphere, and π0 and η mesons in the opposite hemisphere. These results are complemented by a new analysis of pairs of back-to-back charged pions. The π0 and η asymmetries rise with the relative momentum z of the detected hadrons as well as with the transverse momentum with respect to the thrust axis. These asymmetries are sensitive to the Collins fragmentation function H1⊥ and provide complementary information to previous measurements with charged pions and kaons in the final state. In particular, the η final states will provide additional information on the flavor structure of H1⊥. This is the first measurement of the explicit transverse-momentum dependence of the Collins fragmentation function from Belle data. It uses a dataset of 980.4 fb-1 collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV.
Published: 2019

21. Search for Ω(2012)→KΞ(1530)→KπΞ at Belle

Author: M. Takizawa, R. Ayad, John Yelton, Z. Doležal, K. Huang, Y. Sakai, K. Lieret, Shih-Chang Lee, Jyoti Prakash Biswal, F. Tenchini, T. Sumiyoshi, P. Goldenzweig, W. Sutcliffe, J. K. Lee, V. Gaur, Martin Ritter, Y. Onuki, H. Miyata, M. Nakao, S. Sandilya, T. Sanuki, J. E. Fast, I. Adachi, Bo Wang, M. Salehi, L. E. Piilonen, G. Pakhlova, J. MacNaughton, H. Ono, E. Solovieva, M. Starič, K. Hayasaka, A. Bobrov, Massimo Berger, K. T. Kim, D. Y. Kim, Jihwa Lee, Y. Unno, J. Libby, J. H. Yin, H. E. Cho, J. G. Shiu, A. M. Bakich, D. Kotchetkov, J. T. McNeil, G. Schnell, M. Niiyama, R. Kroeger, M. E. Sevior, I. S. Lee, M. Merola, S. K. Choi, C. Z. Yuan, T. Iijima, Phillip Urquijo, H. Hayashii, E. Prencipe, S. E. Vahsen, V. Babu, T. Aushev, D. Epifanov, F. Di Capua, K. Senyo, T. Kawasaki, T. Bilka, M. Sumihama, Y. B. Li, S. Cunliffe, Y. Iwasaki, Y. Seino, N. Gabyshev, D. Červenkov, J. V. Bennett, T. Mori, H. Aihara, Y. Usov, Y. J. Kwon, V. Bhardwaj, T. K. Pedlar, Hyunyong Kim, B. Golob, T. Uglov, M. Uchida, R. Mussa, P. C. Lu, O. Schneider, M. Nayak, Z. P. Zhang, G. De Nardo, L. K. Li, R. Mizuk, N. K. Nisar, D. Liventsev, J. S. Lange, M. Iwasaki, Ya-Qiu Jin, B. G. Cheon, A. Garmash, A. Ishikawa, J. F. Strube, D. Cinabro, L. Li Gioi, Kohei Ogawa, T. Pang, T. Matsuda, S. Al Said, C. Beleño, G.V. Russo, G. S. Varner, H. Ye, K. Inami, G. Inguglia, K. Tanida, P. Križan, R. Itoh, P. K. Behera, A. Rostomyan, W. S. Hou, P. Wang, A. Vinokurova, S. Korpar, Sudhanwa Patra, N. Dash, M. Z. Wang, K. Kinoshita, P. Krokovny, Andrey Sokolov, Somnath Choudhury, W. Ostrowicz, U. Tamponi, A. K. Giri, S. Uno, C. Schwanda, K. H. Kang, K. Cho, A. B. Kaliyar, S. Pardi, J. Schueler, S. Jia, E. Won, D. M. Asner, M. Masuda, H. Kichimi, K. Nishimura, C. P. Shen, Seok Kim, L. Cao, Rahul Kumar, A. Kuzmin, O. Grzymkowska, C. H. Wang, V.E. Shebalin, S. Ogawa, S. Paul, M. Bračko, Peter Kodys, W. W. Jacobs, C. MacQueen, J. K. Ahn, S. Di Carlo, G. Karyan, M. Campajola, V.N. Zhilich, Y. Kato, D. Joffe, Seongbae Yang, A. Vossen, O. Seon, Vladimir Popov, D. Matvienko, Seokhee Park, Victoria Zhukova, A. Chen, K. Chilikin, R. Pestotnik, T. Nakano, B. G. Fulsom, T. E. Browder, V. Savinov, S. Eidelman, P. Pakhlov, A. Bozek, S. Nishida, V. Chekelian, R. Van Tonder, B. K. Pal, K. K. Joo, Seema Bahinipati, T. V. Dong, Y. Choi, K. J. Nath, L. Santelj, O. Hartbrich, and Y. Yusa
Subjects: Nuclear physics, Physics, Baryon, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Detector, Pi, Molecule, 010306 general physics, Branching (polymer chemistry), 01 natural sciences, Omega
Abstract: Using data samples of e+e- collisions collected at the ϒ(1S), ϒ(2S), and ϒ(3S) resonances with the Belle detector, we search for the three-body decay of the Ω(2012) baryon to KπΞ. This decay is predicted to dominate for models describing the Ω(2012) as a KΞ(1530) molecule. No significant Ω(2012) signals are observed in the studied channels, and 90% credibility level upper limits on the ratios of the branching fractions relative to KΞ decay modes are obtained.
Published: 2019

22. First measurements of absolute branching fractions of the Ξc+ baryon at Belle

Author: P. Goldenzweig, S. Pardi, M. Uchida, L. K. Li, D. Liventsev, D. M. Asner, J. F. Strube, S. Nishida, Jyoti Prakash Biswal, Sudhanwa Patra, M. Starič, A. B. Kaliyar, M. Bračko, Z. S. Stottler, G. S. Varner, J. Schueler, I. Adachi, V. Chekelian, A. M. Bakich, L. Li Gioi, E. Won, N. Gabyshev, D. Červenkov, M. Salehi, Y. Onuki, A. Rostomyan, P. Wang, J. K. Lee, V. Gaur, R. Van Tonder, B. K. Pal, V.E. Shebalin, D. Epifanov, L. E. Piilonen, H. Atmacan, Deepak Kumar Sahoo, V.N. Zhilich, R. Mizuk, R. Mussa, Y. Kato, P. C. Lu, C. P. Shen, M. Nakao, Seok Kim, R. B. Garg, J. G. Shiu, G. Pakhlova, B. Bhuyan, B. G. Fulsom, S. E. Vahsen, J. Libby, J. MacNaughton, T. E. Browder, V. Babu, D. Matvienko, R. Kulasiri, G.V. Russo, V. Bhardwaj, T. K. Pedlar, H. Ye, T. Aushev, C. Beleño, W. S. Hou, T. Ferber, T. Uglov, V. Savinov, Y. B. Li, M. Nayak, Y. Choi, K. J. Nath, Seokhee Park, R. Ayad, K. Inami, T. Hara, Ya-Qiu Jin, M. Sumihama, Motoki Iwasaki, Y. Ushiroda, S. Eidelman, Z. P. Zhang, A. Ishikawa, K. Miyabayashi, L. Santelj, K. Senyo, S. Al Said, Y. Seino, P. Pakhlov, M. Niiyama, Y. Iwasaki, Y. J. Kwon, T. Matsuda, J. H. Yin, T. Kawasaki, M. Z. Wang, K. Kinoshita, Shoichi Watanuki, K. Tanida, U. Tamponi, O. Schneider, A. K. Giri, H. Park, A. Bozek, S. Cunliffe, Victoria Zhukova, B. G. Cheon, N. K. Nisar, A. Vinokurova, K. Lalwani, S. Uno, C. Schwanda, D. Cinabro, S. Jia, J. S. Lange, Shih-Chang Lee, A. Kuzmin, M. Masuda, G. B. Mohanty, H. Kichimi, P. Krokovny, Andrey Sokolov, H. Aihara, A. Chen, S. Ogawa, J. Haba, O. Grzymkowska, G. Inguglia, C. H. Wang, K. Cho, H. Ono, S. Paul, B. Shwartz, J. E. Fast, L. Cao, H. Miyata, S. Korpar, D. Dossett, J. K. Ahn, K. K. Joo, F. Tenchini, K. Chilikin, H. Hayashii, Hyunyong Kim, A. J. Schwartz, T. Sumiyoshi, Bo Wang, K. Nishimura, C. H. Kim, R. Kroeger, M. E. Sevior, I. S. Lee, Martin Ritter, T. Bilka, M. Campajola, T. Sanuki, Y. Ban, K. Hayasaka, A. Bobrov, Y. Yusa, A. Garmash, H. E. Cho, Peter Kodys, W. W. Jacobs, R. Pestotnik, B. Grube, Somnath Choudhury, Toru Iijima, V. Bansal, V. V. Zhulanov, S. Di Carlo, G. Karyan, T. J. Moon, Y. Unno, Jihwa Lee, P. K. Behera, Y. Sakai, M. Merola, K. T. Kim, K. Lieret, D. Y. Kim, G. Schnell, T. Kuhr, C. H. Li, E. Solovieva, M. Takizawa, D. Joffe, Seongbae Yang, John Yelton, Z. Doležal, Frank Simon, Vladimir Popov, D. Kotchetkov, P. Križan, Massimo Berger, C. Z. Yuan, and E. Prencipe
Subjects: Physics, Baryon, Particle physics, KEKB, 010308 nuclear & particles physics, Branching fraction, Product (mathematics), Electron–positron annihilation, 0103 physical sciences, 010306 general physics, Lambda, 01 natural sciences, Bar (unit)
Abstract: We present the first measurements of the absolute branching fractions of $\Xi_c^+$ decays into $\Xi^- \pi^+ \pi^+$ and $p K^- \pi^+$ final states. Our analysis is based on a data set of $(772\pm 11)\times 10^{6}$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+e^-$ collider. We measure the absolute branching fraction of $\bar{B}^{0} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{+}$ with the $\Xi_c^+$ recoiling against $\bar{\Lambda}_c^-$ in $\bar{B}^0$ decays resulting in ${\cal B}(\bar{B}^{0} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{+}) = [1.16 \pm 0.42(\rm stat.) \pm 0.15(\rm syst.)] \times 10^{-3}$. We then measure the product branching fractions ${\cal B}(\bar{B}^{0} \to \bar{\Lambda}_c^- \Xi_c^+){\cal B}(\Xi_c^+ \to \Xi^- \pi^+ \pi^+)$ and ${\cal B}(\bar{B}^{0} \to \bar{\Lambda}_c^- \Xi_c^+){\cal B}(\Xi_c^+ \to p K^- \pi^+)$. Dividing these product branching fractions by $\bar{B}^{0} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{+}$ yields: ${\cal B}(\Xi_c^+ \to \Xi^- \pi^+ \pi^+) = [2.86 \pm 1.21(\rm stat.) \pm 0.38(\rm syst.)]\%$ and ${\cal B}(\Xi_c^+ \to p K^- \pi^+)=[0.45 \pm 0.21(\rm stat.) \pm 0.07(\rm syst.)]\%$. Our result for ${\cal B}(\Xi_c^+ \to \Xi^- \pi^+ \pi^+)$ can be combined with $\Xi_c^+$ branching fractions measured relative to $\Xi_c^+ \to \Xi^- \pi^+ \pi^+$ to set the absolute scale for many $\Xi_c^+$ branching fractions.
Published: 2019

23. Search for B0→X(3872)γ

Author: A. Garmash, P. K. Behera, P. C. Chou, K. K. Joo, L. E. Piilonen, G. Pakhlova, R. Kulasiri, M. Sumihama, Motoki Iwasaki, Y. Ushiroda, H. Hayashii, Y. Sakai, S. Eidelman, K. Lieret, Jihwa Lee, P. Pakhlov, S. Al Said, M. Merola, G. Schnell, T. Iijima, E. Solovieva, S. Pardi, S. E. Vahsen, D. Joffe, H. Park, A. Bozek, Y. Yusa, J. V. Bennett, Y. Tao, T. Mori, H. Aihara, H. Miyata, M. Uchida, Seongbae Yang, A. Vossen, Kohei Ogawa, O. Seon, T. Matsuda, Bo Wang, S. Uno, C. Schwanda, Vladimir Popov, R. Mussa, V. Babu, B. G. Cheon, I. Adachi, Y. Iwasaki, Y. J. Kwon, G.V. Russo, Z. P. Zhang, T. Aushev, K. Inami, A. Ishikawa, K. Hayasaka, A. Bobrov, M. Salehi, R. B. Garg, T. V. Dong, Y. Choi, K. J. Nath, D. Kotchetkov, T. Ferber, D. Liventsev, O. Schneider, L. Santelj, T. E. Browder, C. H. Li, P. Križan, B. G. Fulsom, W. S. Hou, Y.-T. Lai, Z. S. Stottler, H. E. Cho, P. Krokovny, Jyoti Prakash Biswal, V. Savinov, O. Hartbrich, J. Libby, G. S. Varner, J. Haba, K. Cho, Takuro Sanuki, M. Nayak, M. Niiyama, J. K. Lee, V. Gaur, D. Epifanov, R. Itoh, R. Ayad, P. Goldenzweig, S. Sandilya, S. Korpar, A. Rostomyan, P. Wang, S. Nishida, Y. Seino, Seok Kim, M. Starič, N. Dash, J. MacNaughton, Ya-Qiu Jin, Shoichi Watanuki, T. Kumita, T. K. Pedlar, J. G. Shiu, D. Cinabro, H. Ono, Phillip Urquijo, V.N. Zhilich, Y. Kato, G. Inguglia, V. Chekelian, A. Kuzmin, C.-L. Hsu, Y. B. Li, P. Chang, Rahul Kumar, K. Nishimura, V.E. Shebalin, V. V. Zhulanov, S. Ogawa, Y. Unno, R. Van Tonder, K. Miyabayashi, I. Badhrees, B. K. Pal, Somnath Choudhury, K. Senyo, Peter Kodys, E. Waheed, W. W. Jacobs, T. Kawasaki, D. Y. Kim, B. Bhuyan, S. Di Carlo, R. Mizuk, J. E. Fast, T. Uglov, M. Campajola, M. Z. Wang, K. Kinoshita, T. Bilka, M. Watanabe, J. H. Yin, D. M. Asner, F. Tenchini, A. K. Giri, S. Jia, C. Kiesling, T. Sumiyoshi, M. Masuda, O. Grzymkowska, C. H. Wang, S. Paul, L. Li Gioi, Martin Ritter, M. Bračko, Tao Luo, K. Tanida, J. S. Lange, H. Ye, L. Cao, A. M. Bakich, S. Cunliffe, A. B. Kaliyar, N. Gabyshev, D. Červenkov, J. Schueler, E. Won, J. F. Strube, H. Kichimi, Gagan Bihari Mohanty, K. Chilikin, H. Atmacan, J. B. Singh, S. K. Choi, Sudhanwa Patra, M. Takizawa, John Yelton, Z. Doležal, R. Pestotnik, W. Sutcliffe, Y. Onuki, Massimo Berger, V. M. Aulchenko, C. Z. Yuan, R. Kroeger, M. E. Sevior, E. Prencipe, Shih-Chang Lee, B. Shwartz, Victoria Zhukova, and A. Chen
Subjects: Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, Electron–positron annihilation, Resonance, 01 natural sciences, Luminosity, law.invention, KEKB, law, 0103 physical sciences, 010306 general physics, Collider, Energy (signal processing), X(3872)
Abstract: We report the results of a search for the decay $B^0 \to X(3872)(\to J/\psi \pi^+ \pi^-) \gamma$. The analysis is performed on a data sample corresponding to an integrated luminosity of $711\,{\rm fb}^{-1}$ and containing $772 \times 10^6 B\bar{B}$ pairs, collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider running at the $\Upsilon(4S)$ resonance energy. We find no evidence for a signal and place an upper limit of $\mathcal{B}(B^0 \to X(3872)\gamma)\times \mathcal{B}(X(3872) \to J/\psi \pi^+ \pi^-) < 5.1 \times 10^{-7}$ at 90% confidence level.
Published: 2019

24. Measurement of branching fraction and final-state asymmetry for the B¯0→KS0K∓π± decay

Author: G. Schnell, T. Iijima, S. Nishida, X. L. Wang, V. Chekelian, R. Van Tonder, B. K. Pal, T. Kuhr, C.-L. Hsu, A. Frey, W. Sutcliffe, V. Babu, P. Goldenzweig, S. Sandilya, Peter Kodys, S. Di Carlo, G. Karyan, R. Mizuk, C. Beleño, A. K. Giri, T. Aushev, Jihwa Lee, M. Masuda, G. B. Mohanty, M. Starič, L. Cao, J. E. Fast, T. Matsuda, A. Garmash, Daniel Greenwald, V. Bansal, J. G. Shiu, M. Merola, L. E. Piilonen, S. Al Said, R. Kroeger, M. E. Sevior, I. S. Lee, G. Pakhlova, R. Kulasiri, P. K. Behera, S. Eidelman, T. V. Dong, G.V. Russo, T. Bilka, C. Kiesling, K. Lalwani, W. S. Hou, Alexei Kuzmin, H. Park, A. Bozek, Y. Choi, K. J. Nath, T. Hara, L. Santelj, V. Vorobyev, S. Uno, C. Schwanda, Phillip Urquijo, P. Krokovny, R. B. Garg, B. Bhuyan, Y. B. Li, B. G. Fulsom, M. Bračko, K. Cho, V. M. Aulchenko, V. Savinov, N. K. Nisar, D. Joffe, T.-A. Shibata, J. S. Lange, A. M. Bakich, Seongbae Yang, K. Inami, K. Chilikin, O. Seon, N. Gabyshev, D. Červenkov, Vladimir Popov, C. Z. Yuan, E. Prencipe, M. Uchida, Rahul Kumar, S. K. Choi, L. K. Li, A. B. Kaliyar, Bo Wang, D. Epifanov, D. Liventsev, H. Hayashii, Hyunyong Kim, E. Won, K. Hayasaka, A. Bobrov, T. K. Pedlar, H. Atmacan, G. S. Varner, R. Pestotnik, M. Gelb, M. Z. Wang, K. Kinoshita, R. Itoh, D. Y. Kim, A. Rostomyan, J. B. Kim, P. Wang, M. Takizawa, Z. Doležal, Y. Yusa, Z. P. Zhang, K. Senyo, B. G. Cheon, T. Kawasaki, J. Libby, J. Haba, S. Korpar, Y. Seino, N. Dash, M. Mrvar, S. Pardi, Tao Luo, K. Tanida, Kevin Varvell, S. Jia, Eberhard Widmann, H. Yamamoto, H. Kichimi, Z. J. Liptak, Y. Tao, T. Mori, H. Aihara, Y. Usov, Jyoti Prakash Biswal, D. Cinabro, C. H. Wang, M. Lubej, G. Inguglia, P. Chang, S. Paul, L. Li Gioi, Somnath Choudhury, Victoria Zhukova, J. K. Lee, V. Gaur, A. Chen, H. Ye, M. Nakao, J. MacNaughton, E. Nakano, V.N. Zhilich, F. Tenchini, T. Sumiyoshi, K. Miyabayashi, I. Badhrees, Martin Ritter, T. Sanuki, M. Sumihama, Motoki Iwasaki, S. Cunliffe, Y. Guan, Shih-Chang Lee, C. H. Li, C. P. Shen, Seok Kim, I. Adachi, M. Salehi, Y.-T. Lai, M. Nayak, Ya-Qiu Jin, R. Mussa, P. C. Lu, A. Ishikawa, P. Križan, D. Matvienko, V. V. Zhulanov, T. Uglov, Y. Sakai, Y. Iwasaki, Y. J. Kwon, O. Schneider, E. Solovieva, K. Huang, D. M. Asner, D. Kotchetkov, A. Rabusov, S. Ogawa, and Y. Unno
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Resonance, State (functional analysis), 01 natural sciences, Asymmetry, law.invention, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, Bar (unit), media_common
Abstract: We report a measurement of the branching fraction and final-state asymmetry for the $\bar{B}^{0}\to K^{0}_{S}K^{\mp}\pi^{\pm}$ decays. The analysis is based on a data sample of 711 $\rm{fb}^{-1}$ collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. We obtain a branching fraction of $(3.60\pm0.33\pm0.15)\times10^{-6}$ and a final-state asymmetry of $(-8.5\pm8.9\pm0.2)\%$, where the first uncertainties are statistical and the second are systematic. Hints of peaking structures are seen in the differential branching fractions measured as functions of Dalitz variables.
Published: 2019

25. Transverse momentum dependent production cross sections of charged pions, kaons and protons produced in inclusive e+e− annihilation at s=10.58 GeV

Author: X. L. Wang, R. Van Tonder, B. K. Pal, R. B. Garg, A. Bozek, D. Epifanov, Soumya D. Mohanty, M. Uchida, L. K. Li, P. Goldenzweig, M. Lubej, G. Pakhlova, D. Liventsev, V. Bhardwaj, S. Sandilya, U. Tamponi, M. Nayak, M. Sumihama, Motoki Iwasaki, H. Hayashii, Hyunyong Kim, C. H. Kim, S. Jia, C. Kiesling, Victoria Zhukova, A. Chen, M. Takizawa, Takuro Sanuki, B. G. Cheon, T. Uglov, Pavel Krokovny, Kiyoshi Tanida, G. Schnell, T. Iijima, Somnath Choudhury, D. Matvienko, M. Z. Wang, Shih-Chang Lee, T. K. Pedlar, S. Pardi, E. Solovieva, K. Chilikin, R. Itoh, Jihwa Lee, John Yelton, T. Matsuda, Z. Doležal, Y. Jin, M. Bračko, K. Lalwani, A. Rostomyan, O. Grzymkowska, C. H. Wang, T. V. Dong, Y. Choi, K. J. Nath, S. Uno, S. Paul, L. Li Gioi, P. Wang, L. Santelj, C. Schwanda, B. Shwartz, Seokhee Park, J. G. Shiu, T. Kuhr, J. B. Kim, T.-A. Shibata, M. Starič, C. P. Shen, D. Kotchetkov, D. Cinabro, Seok Kim, R. Mussa, R. Kroeger, M. E. Sevior, I. S. Lee, Y. Sakai, A. M. Bakich, H. Ye, W. Sutcliffe, Tagir Aushev, Y. Onuki, E. Won, S. Korpar, A. Ishikawa, Tao Luo, R. Pestotnik, Y. Iwasaki, J. Libby, D. M. Asner, Y. J. Kwon, A. Garmash, V. Gaur, Y. Seino, K. Hayasaka, Z. Drásal, V. Bansal, P. Križan, V. M. Aulchenko, V.N. Zhilich, K. Inami, O. Schneider, P. Pakhlov, T. Ferber, H. Kichimi, Z. S. Stottler, Leo Piilonen, D. Joffe, A. Kuzmin, M. V. Purohit, Massimo Berger, M. Merola, Andrey Sokolov, N. Gabyshev, D. Červenkov, K. Miyabayashi, P. K. Behera, Seongbae Yang, B. G. Fulsom, A. Vossen, S. Nishida, G. Varner, K. Nishimura, C. Z. Yuan, E. Nakano, T. Nakano, K. Senyo, K. K. Joo, E. Prencipe, J. K. Ahn, T. Kawasaki, Z. Natkaniec, Vladimir Popov, J. E. Fast, S. Ogawa, F. Tenchini, Semen Eidelman, Phillip Urquijo, M. Gelb, E. Waheed, Sudhanwa Patra, Y. B. Li, C. H. Li, T. Bilka, M. Watanabe, V.E. Shebalin, A. B. Kaliyar, J. Schueler, G.V. Russo, W. S. Hou, T. Sumiyoshi, J. H. Yin, Dmytro Levit, B. Golob, J. S. Lange, R. Kulasiri, T. Julius, R. Seidl, S. Cunliffe, Peter Kodys, W. W. Jacobs, S. Di Carlo, A. K. Giri, M. Masuda, R. Ayad, K. Cho, L. Cao, S. Uehara, C. Beleño, H. Ono, R. Mizuk, Y. Unno, Iki Adachi, Doo Young Kim, M. Salehi, Bo Wang, H. Aihara, A. Bobrov, Y. Tao, T. Mori, Y. Usov, H. E. Cho, Z. P. Zhang, Jyoti Prakash Biswal, J. K. Lee, M. Nakao, and J. MacNaughton
Subjects: Physics, Annihilation, 010308 nuclear & particles physics, Scattering, Electron–positron annihilation, Nuclear Theory, Hadron, Thrust, 01 natural sciences, 7. Clean energy, Nuclear physics, Transverse plane, Pion, KEKB, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: We report measurements of the production cross sections of charged pions, kaons, and protons as a function of fractional energy, the event-shape variable called thrust, and the transverse momentum with respect to the thrust axis. These measurements access the transverse momenta created in the fragmentation process, which are of critical importance to the understanding of any transverse-momentum-dependent distribution and fragmentation functions. The low transverse-momentum part of the cross sections can be well described by Gaussians in transverse momentum as is generally assumed but the fractional-energy dependence is nontrivial and different hadron types have varying Gaussian widths. The width of these Gaussians decreases with thrust and shows an initially rising, then decreasing fractional-energy dependence. The widths for pions and kaons are comparable within uncertainties, while those for protons are significantly narrower. These single-hadron cross sections and Gaussian widths are obtained from a 558 fb-1 data sample collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
Published: 2019

26. Search for X(3872) and X(3915) decay into χc1π0 in B decays at Belle

Author: M. Z. Wang, K. Kinoshita, T. Matsuda, G. Bonvicini, D. M. Asner, P. K. Resmi, A. Garmash, C.-L. Hsu, Daniel Greenwald, P. Krokovny, V. Bansal, P. Goldenzweig, S. Sandilya, J. Libby, K. Cho, Z. P. Zhang, J. E. Fast, Peter Kodys, W. W. Jacobs, M. Starič, D. Cinabro, P. Chang, Somnath Choudhury, M. Nayak, P. K. Behera, S. Di Carlo, H. Ono, T. Bilka, Ya-Qiu Jin, A. B. Kaliyar, Y. Seino, D. Epifanov, Shoichi Watanuki, S. Pardi, Jyoti Prakash Biswal, G. Karyan, Y. Sakai, D. Y. Kim, M. Watanabe, J. K. Lee, V. Gaur, Y. Iwasaki, B. G. Cheon, Y. J. Kwon, R. Kroeger, M. E. Sevior, I. S. Lee, V. Bhardwaj, T. K. Pedlar, A. K. Giri, L. Li Gioi, D. Matvienko, M. Nakao, O. Schneider, M. Uchida, T. Uglov, L. K. Li, S. Nishida, C. MacQueen, M. Masuda, E. Won, H. Ye, S. Cunliffe, Seokhee Park, G. Schnell, T. Iijima, Sudhanwa Patra, D. Liventsev, J. MacNaughton, H. Hayashii, C. H. Kim, J. Haba, K. Lalwani, S. Uno, C. Schwanda, Seema Bahinipati, G. B. Mohanty, S. Korpar, R. Mussa, T. V. Dong, X. L. Wang, V. Chekelian, G. S. Varner, Jihwa Lee, L. Cao, Y. Choi, K. J. Nath, R. Mizuk, T. Kuhr, C. Kiesling, P. C. Lu, E. Solovieva, S. Ogawa, T. Hara, L. Santelj, U. Tamponi, A. Ishikawa, M. Merola, C. Beleño, T. Mori, H. Aihara, K. Tanida, R. Itoh, R. Van Tonder, M. Bračko, Rahul Kumar, B. K. Pal, S. K. Choi, Z. S. Stottler, F. Tenchini, A. Rostomyan, P. Wang, Shih-Chang Lee, G.V. Russo, J. G. Shiu, R. B. Garg, B. Bhuyan, R. Ayad, S. Jia, Victoria Zhukova, P. Križan, B. G. Fulsom, T. E. Browder, T. Sumiyoshi, Jia-ju Zhang, A. Chen, N. Gabyshev, D. Červenkov, K. Inami, W. S. Hou, Phillip Urquijo, Martin Ritter, O. Grzymkowska, C. H. Wang, S. Uehara, K. Chilikin, S. Paul, T. Sanuki, Massimo Berger, V. Savinov, Y. B. Li, L. E. Piilonen, Andrey Sokolov, A.E. Bondar, G. Pakhlova, R. Kulasiri, R. Pestotnik, D. Kotchetkov, E. Prencipe, S. Eidelman, K. Senyo, M. Takizawa, P. Pakhlov, M. Campajola, K. Nishimura, V. V. Zhulanov, John Yelton, Z. Doležal, T. Kawasaki, B. Shwartz, I. Adachi, H. Park, A. Bozek, T. Julius, J. H. Yin, M. Salehi, W. Sutcliffe, D. Joffe, Seongbae Yang, Y. Onuki, N. K. Nisar, J. S. Lange, K. K. Joo, O. Seon, Frank Simon, Vladimir Popov, M. Sumihama, Motoki Iwasaki, V.N. Zhilich, Y. Kato, K. Miyabayashi, I. Badhrees, K. Trabelsi, C. P. Shen, Seok Kim, V. Babu, T. Aushev, T. Ferber, M. Niiyama, Bo Wang, K. Hayasaka, A. Bobrov, and H. E. Cho
Subjects: Physics, KEKB, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, Pi, Resonance, 010306 general physics, 01 natural sciences, X(3872)
Abstract: We report a search for X(3872) and X(3915) in B+→χc1π0K+ decays. We set an upper limit of B(B+→X(3872)K+)×B(X(3872)→χc1π0)
Published: 2019

27. Evidence for the decay B0→pp¯π0

Author: L. E. Piilonen, K. Nishimura, G. Pakhlova, H. Miyata, R. Kulasiri, Bo Wang, D. Joffe, Seongbae Yang, K. Hayasaka, A. Bobrov, C.-L. Hsu, Peter Kodys, W. W. Jacobs, S. Di Carlo, G. Karyan, K. T. Kim, Frank Simon, P. C. Lu, R. Mizuk, C. Beleño, K. Adamczyk, Vladimir Popov, G.V. Russo, S. K. Choi, A. Ishikawa, W. S. Hou, A. K. Giri, M. Masuda, G. B. Mohanty, L. Cao, C. P. Shen, P. Križan, Y. Sakai, Seok Kim, R. B. Garg, B. Bhuyan, I. Adachi, H. Aihara, K. Senyo, V. Babu, B. G. Fulsom, M. Salehi, T. Aushev, Jyoti Prakash Biswal, M. Takizawa, A. B. Kaliyar, T. E. Browder, Y. Iwasaki, Y. J. Kwon, M. Uchida, John Yelton, L. K. Li, M. Iwasaki, Z. Doležal, J. Schueler, Z. S. Stottler, G. Schnell, T. Iijima, T. Ferber, E. Won, D. Y. Kim, O. Schneider, D. Liventsev, B. G. Cheon, K. Inami, J. F. Strube, V. Gaur, V. Savinov, E. Solovieva, J. Libby, F. Tenchini, M. Nakao, H. Atmacan, G. S. Varner, M. Z. Wang, J. MacNaughton, Jihwa Lee, H. Ono, K. Kinoshita, S. Ogawa, U. Tamponi, R. Itoh, J. Haba, T. Sumiyoshi, Sudhanwa Patra, S. Nishida, Shih-Chang Lee, D. Kotchetkov, A. Rostomyan, Jia-ju Zhang, P. Wang, P. Goldenzweig, S. Korpar, Z. P. Zhang, V. Chekelian, S. Sandilya, Y. Seino, M. Merola, T. Sanuki, Massimo Berger, R. Van Tonder, B. K. Pal, N. K. Nisar, Shoichi Watanuki, M. Starič, S. Eidelman, S. Pardi, J. G. Shiu, R. Ayad, P. Pakhlov, E. Prencipe, S. Jia, S. Uno, C. Schwanda, S. Cunliffe, H. Hayashii, C. Kiesling, Phillip Urquijo, Y. Guan, C. H. Kim, D. M. Asner, A. Bozek, Y. B. Li, C. MacQueen, D. Matvienko, R. Kroeger, M. E. Sevior, A. J. Schwartz, M. Bračko, C. H. Wang, Seokhee Park, Tao Luo, K. Tanida, S. Paul, L. Li Gioi, M. Campajola, T. Uglov, V.N. Zhilich, D. Cinabro, H. Kichimi, H. Ye, K. Miyabayashi, I. Badhrees, M. Nayak, N. Gabyshev, D. Červenkov, W. Sutcliffe, Y. Onuki, Ya-Qiu Jin, J. E. Fast, V. M. Aulchenko, D. Dossett, T. Matsuda, A. Garmash, T. Bilka, M. Watanabe, V. Bansal, A. Vinokurova, P. K. Behera, P. Krokovny, K. Cho, D. Epifanov, V. Bhardwaj, T. K. Pedlar, Victoria Zhukova, A. Chen, K. Chilikin, R. Pestotnik, Y. Yusa, K. K. Joo, T. V. Dong, Y. Choi, K. J. Nath, T. Hara, and Andrey Sokolov
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Resonance, 01 natural sciences, Belle experiment, Luminosity, Baryon, KEKB, 0103 physical sciences, 010306 general physics, Bar (unit)
Abstract: We report a search for the charmless baryonic decay $B^0\to p\bar{p}\pi^0$ with a data sample corresponding to an integrated luminosity of 711~$\rm fb^{-1}$ containing $(772\pm 10)\times 10^6$ $B^0\bar{B}^0$ pairs. The data was collected by the Belle experiment running on the $\Upsilon(4S)$ resonance at the KEKB $e^+e^-$ collider. We measure a branching fraction $\mathcal{B}(B^0\to p\bar{p}\pi^0)= (5.0\pm1.8\pm0.6 )\times 10^{-7}$, where the first uncertainty is statistical and the second is systematic. The signal has a significance of 3.1 standard deviations and constitutes the first evidence for this decay mode. We also search for the intermediate two-body decays $B^{0}\to\Delta^+\bar{p}$ and $B^0\to\bar{\Delta}^-p$, and set an upper limit on the branching fraction: $\mathcal{B}(B^0\to \Delta^+\bar{p})+\mathcal{B}(B^0\to\bar{\Delta}^-p)
Published: 2019

28. Search for the B→Y(4260)K , Y(4260)→J/ψπ+π− decays

Author: M. Takizawa, Takuro Sanuki, Pavel Krokovny, Y. Iwasaki, V.N. Zhilich, Y. J. Kwon, R. Mussa, S. Cunliffe, P. C. Lu, H. B. Jeon, Leo Piilonen, O. Schneider, D. Joffe, B. G. Fulsom, Seongbae Yang, S. Nishida, K. Trabelsi, A. Ishikawa, Vladimir Popov, G. Pakhlova, Y. Seino, P. K. Resmi, C. P. Shen, Seok Kim, P. Križan, C.-L. Hsu, N. Gabyshev, D. Červenkov, Y. B. Li, M. Nayak, M. Uchida, Victoria Zhukova, C. Z. Yuan, L. K. Li, C. H. Li, Z. P. Zhang, V. Babu, D. Liventsev, K. Miyabayashi, B. G. Cheon, G. Schnell, A. Chen, E. Prencipe, Andrey Sokolov, X. L. Wang, G.V. Russo, S. Sandilya, J. Haba, M. Sumihama, K. Nishimura, Motoki Iwasaki, Z. Drásal, V. V. Zhulanov, K. K. Joo, Peter Kodys, W. W. Jacobs, S. Korpar, Sudhanwa Patra, T. Matsuda, R. Itoh, R. Van Tonder, J. K. Ahn, W. S. Hou, N. Dash, Seema Bahinipati, T. V. Dong, Y. Choi, K. J. Nath, B. K. Pal, A. Rostomyan, T. Kuhr, P. Wang, S. Di Carlo, T. K. Pedlar, Semen Eidelman, R. B. Garg, Kiyoshi Tanida, J. G. Shiu, Y. Sakai, Tagir Aushev, Y. Onuki, T. Julius, A. Garmash, H. Miyata, John Yelton, Z. Doležal, Jyoti Prakash Biswal, V. Bansal, Bo Wang, J. B. Kim, V. M. Aulchenko, A. B. Kaliyar, M. Bračko, K. Chilikin, M. Merola, J. K. Lee, K. Senyo, A. Bobrov, V. Bhardwaj, T. Kawasaki, Rahul Kumar, J. Schueler, T. Sumiyoshi, H. E. Cho, M. Nakao, C. Beleño, J. B. Singh, Shih-Chang Lee, S. K. Choi, E. Won, J. MacNaughton, V.E. Shebalin, R. Pestotnik, S. Jia, A. Bozek, P. Pakhlov, H. Aihara, Kevin Varvell, J. H. Yin, A. K. Giri, Y. Jin, V. Gaur, O. Grzymkowska, C. H. Wang, M. Masuda, S. Paul, B. Golob, T. Mori, J. E. Fast, Y. Usov, G. B. Mohanty, J. S. Lange, L. Cao, G. Varner, T. Bilka, S. Al Said, M. Watanabe, L. Li Gioi, S. Uno, C. Schwanda, T.-A. Shibata, H. Ye, D. Cinabro, K. Prasanth, D. Kotchetkov, E. Solovieva, K. Inami, M. Z. Wang, K. Kinoshita, H. Hayashii, R. Ayad, K. Cho, Iki Adachi, Doo Young Kim, M. Salehi, H. Ono, R. Mizuk, S. Pardi, Y. Unno, M. Starič, R. Kroeger, J. Libby, D. M. Asner, M. E. Sevior, K. Hayasaka, G. Inguglia, Z. S. Stottler, Tao Luo, S. Ogawa, F. Tenchini, H. Kichimi, E. Waheed, T. Uglov, and D. Matvienko
Subjects: Physics, Particle physics, KEKB, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Invariant mass, 010306 general physics, 01 natural sciences
Abstract: We report the results of a search for the B→Y(4260)K, Y(4260)→J/ψπ+π- decays. This study is based on a data sample corresponding to an integrated luminosity of 711 fb-1, collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We investigate the J/ψπ+π- invariant mass distribution in the range 4.0 to 4.6 GeV/c2 using both B+→J/ψπ+π-K+ and B0→J/ψπ+π-KS0 decays. We find excesses of events above the background levels, with significances of 2.1 and 0.9 standard deviations for charged and neutral B→Y(4260)K decays, respectively, taking into account the systematic uncertainties. These correspond to upper limits on the product of branching fractions, B(B+→Y(4260)K+)×B(Y(4260)→J/ψπ+π-)
Published: 2019

29. First Measurements of Absolute Branching Fractions of the Ξc0 Baryon at Belle

Author: S. Jia, C. H. Wang, H. Ye, S. Pardi, V.N. Zhilich, T. Aushev, A. K. Giri, G.V. Russo, G. Schnell, K. Tanida, M. Niiyama, Luka Santelj, V. Zhukova, Y. Onuki, T. Iijima, J. G. Shiu, M. Masuda, R. Mussa, Rocky Bala Garg, T. Bilka, Jyoti Prakash Biswal, K. Miyabayashi, I. Badhrees, X. L. Wang, A. Ishikawa, V. Gaur, M. Nakao, M. Takizawa, A. Kuzmin, Phillip Urquijo, R. Van Tonder, L. Cao, I. Adachi, P. Križan, Soumen Paul, S. Eidelman, John Yelton, Z. Doležal, Bingran Wang, J. H. Yin, Jihwa Lee, Y. B. Li, T. Matsuda, W. Sutcliffe, S. Uno, J. B. Kim, M. Merola, S. Cunliffe, K. K. Joo, Massimo Berger, C.-L. Hsu, Shih-Chang Lee, E. Prencipe, A. Bozek, Y. Iwasaki, Y. J. Kwon, G. B. Mohanty, C. Z. Yuan, E. Solovieva, Y. Ban, K. Senyo, Vikas Bansal, Y. Yusa, E. Nakano, M. Uchida, D. Joffe, M. Salehi, O. Schneider, L. K. Li, S. H. Kim, P. Krokovny, V. Bhardwaj, K. Cho, B. Shwartz, H. J. Kim, K. Trabelsi, G. S. Varner, M. Nayak, Seokhee Park, L. E. Piilonen, B. Bhuyan, T. V. Dong, Y. Choi, K. J. Nath, T. A. Shibata, K. Inami, H. Kichimi, A. J. Schwartz, T. Uglov, C. P. Shen, J. Libby, D. M. Asner, K. Hayasaka, B. G. Fulsom, B. Pal, K. T. Kim, P. Pakhlov, Y. Sakai, P. L. Wang, M. Sumihama, M. Iwasaki, B. G. Cheon, H. Miyata, Peter Kodys, W. W. Jacobs, S. Al Said, V. Savinov, D. Liventsev, R. Ayad, James E. Fast, Vladimir Popov, T. K. Pedlar, Y. Jin, J. Schueler, E. Won, Z. P. Zhang, S. K. Choi, R. Kroeger, M. E. Sevior, P. Goldenzweig, S. Sandilya, N. Gabyshev, D. Červenkov, S. Di Carlo, S. Nishida, J. MacNaughton, Seongbae Yang, M. Z. Wang, K. Kinoshita, R. Itoh, D. Y. Kim, M. Starič, T. Kumita, G. Karyan, G. Pakhlova, A. Bondar, F. Tenchini, S. Korpar, D. Kotchetkov, B. Grube, R. Mizuk, T. Sumiyoshi, C. Schwanda, H. Ono, T. Sanuki, Y. Seino, C. Beleño, M. Bračko, Y. Tao, H. Aihara, Y. Unno, Takeo Kawasaki, H. Hayashii, D. Cinabro, M. Lubej, G. Inguglia, K. Chilikin, L. Li Gioi, A. Garmash, Daniel Greenwald, R. Pestotnik, Z. Drásal, and A. Chen
Subjects: 0103 physical sciences, General Physics and Astronomy, Library science, 010306 general physics, 01 natural sciences
Abstract: We thank Professor Fu-sheng Yu for useful discussions and comments. Y. B. L. acknowledges the support from the China Scholarship Council (201706010043). We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya’s TLPRC (Japan); ARC (Australia); FWF (Austria); the National Natural Science Foundation of China under Contracts No. 11475187, No. 11521505, No. 11575017, No. 11761141009; the CAS Center for Excellence in Particle Physics (CCEPP); MSMT (Czechia); CZF, DFG, EXC153, and VS (Germany); DST (India); INFN (Italy); MOE, MSIP, NRF, RSRI, FLRFAS project and GSDC of KISTI and KREONET/GLORIAD (Korea); MNiSW and NCN (Poland); MSHE, Agreement No. 14.W03.31.0026 (Russia); ARRS (Slovenia); IKERBASQUE (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (U.S.).
Published: 2019

30. Observation of Ξ(1620)0 and Evidence for Ξ(1690)0 in Ξc+→Ξ−π+π+ Decays

Author: V.N. Zhilich, Y. Kato, S. Al Said, K. T. Kim, K. Miyabayashi, I. Badhrees, M. Merola, J. K. Ahn, J. G. Shiu, H. Park, A. Bozek, Andrey Sokolov, R. Mizuk, S. K. Choi, C. Kiesling, Y. Choi, K. J. Nath, H. Ono, K. Chilikin, Phillip Urquijo, C. Beleño, Y. B. Li, James E. Fast, K. Senyo, Semen Eidelman, P. Pakhlov, G. Schnell, D. Epifanov, M. Iwasaki, S. Hirose, Iki Adachi, M. Takizawa, B. G. Cheon, S. Uno, C. Schwanda, S. Nishida, M. Sumihama, N. Taniguchi, Vikas Bansal, A. Garmash, S. Sandilya, N. K. Nisar, B. Pal, C. P. Shen, L. E. Piilonen, E. Nakano, M. Uchida, John Yelton, Z. Doležal, L. K. Li, X. L. Wang, V. Bhardwaj, C. Van Hulse, Z. Natkaniec, Z. Drásal, J. B. Kim, T. K. Pedlar, Soumen Paul, V. Babu, M. Niiyama, M. Starič, Z. P. Zhang, V. Chekelian, T. Aushev, V. Gaur, G. S. Varner, S. Korpar, Massimo Berger, D. Kotchetkov, Eleonora Guido, S. E. Vahsen, T. Nakano, T. Julius, R. Itoh, Shih-Chang Lee, C. Z. Yuan, Peter Kodys, W. W. Jacobs, K. K. Joo, B. Bhuyan, A. B. Kaliyar, R. Ayad, H. K. Moon, J. S. Lange, B. G. Fulsom, Seema Bahinipati, G. Pakhlova, R. Mussa, G. B. Mohanty, H. B. Jeon, T. Matsuda, M. Gelb, Y. Iwasaki, Y. J. Kwon, D. Y. Kim, A. Ishikawa, F. Tenchini, V. Savinov, O. Schneider, S. Di Carlo, Jyoti Prakash Biswal, G. Karyan, T. Sumiyoshi, M. Nakao, A. Chen, Y. Yusa, S. Zakharov, P. Križan, G. Bonvicini, T. V. Dong, Martin Ritter, T. A. Shibata, H. Miyata, J. F. Strube, V. Vorobyev, T. Sanuki, E. Won, A. K. Giri, V. Zhukova, S. H. Kim, P. Krokovny, Rakesh Kumar, R. Pestotnik, M. Masuda, P. L. Wang, K. H. Kang, K. Cho, H. Atmacan, S. Cunliffe, L. Li Gioi, T. Bilka, G.V. Russo, M. Watanabe, V.E. Shebalin, T. E. Browder, U. Tamponi, W. S. Hou, T. Mori, H. Aihara, S. Jia, C. H. Wang, H. Ye, Tara Nanut, T. Uglov, A. Kuzmin, M. Bračko, Rocky Bala Garg, Eberhard Widmann, A. M. Bakich, N. Dash, B.A. Shwartz, N. Gabyshev, D. Červenkov, D. Liventsev, Vladimir Zhulanov, Y. Jin, R. Kroeger, M. E. Sevior, I. S. Lee, P. Goldenzweig, Tao Luo, K. Tanida, Bingran Wang, D. Matvienko, D. Cinabro, M. Lubej, G. Inguglia, E. Solovieva, J. Haba, A. Vossen, Somnath Choudhury, S. Pardi, Frank Simon, Vladimir Popov, J. Libby, D. M. Asner, K. Hayasaka, Y. Seino, Shoichi Watanuki, Dipak Kumar Sahoo, Luka Santelj, K. Inami, M. Z. Wang, K. Kinoshita, T. Czank, and H. Hayashii
Subjects: Physics, Particle physics, Electron–positron annihilation, Quark model, Hyperon, General Physics and Astronomy, Strangeness, 01 natural sciences, Baryon, KEKB, 0103 physical sciences, Pi, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract: We report the first observation of the doubly-strange baryon $\Xi(1620)^0$ in its decay to $\Xi^-\pi^+$ via $\Xi_c^+ \rightarrow \Xi^- \pi^+ \pi^+$ decays based on a $980\,{\rm fb}^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The mass and width are measured to be 1610.4 $\pm$ 6.0 (stat) $^{+5.9}_{-3.5}$ (syst)~MeV$/c^2$ and 59.9 $\pm$ 4.8 (stat) $^{+2.8}_{-3.0}$ (syst)~MeV, respectively. We obtain 4.0$\sigma$ evidence of the $\Xi(1690)^0$ with the same data sample. These results shed light on the structure of hyperon resonances with strangeness $S=-2$.
Published: 2019

31. Measurements of branching fraction and direct CP asymmetry in B±→KS0KS0K± and a search for B±→KS0KS0π±

Author: S. Nishida, Jyoti Prakash Biswal, X. L. Wang, G. Schnell, T. Iijima, J. G. Shiu, J. K. Lee, V. Gaur, V. Chekelian, Phillip Urquijo, Deepak Kumar Sahoo, M. Nakao, W. Ostrowicz, R. Van Tonder, B. K. Pal, S. Jia, P. Goldenzweig, T. Matsuda, K. K. Joo, J. E. Fast, T. Bilka, T. Kuhr, J. MacNaughton, J. C. Dingfelder, S. Sandilya, D. Cinabro, Y. B. Li, M. Z. Wang, K. Kinoshita, O. Grzymkowska, C. H. Wang, S. Paul, H. B. Jeon, Seema Bahinipati, D. M. Asner, L. Li Gioi, T. V. Dong, A. Garmash, Y. Choi, K. J. Nath, Daniel Greenwald, M. Starič, P. Krokovny, S. Eidelman, T. Hara, K. Cho, Kevin Varvell, H. Ye, K. Prasanth, J. H. Yin, V. Bansal, F. Tenchini, H. Ono, A. M. Bakich, M. Iwasaki, A. Bozek, Somnath Choudhury, D. Matvienko, B. G. Cheon, A. Ishikawa, T. Sumiyoshi, D. Epifanov, Z. Natkaniec, Soumya D. Mohanty, Y. Tao, T. Mori, H. Aihara, P. K. Behera, R. B. Garg, Y. Usov, H. Hayashii, B. G. Fulsom, J. Haba, N. Gabyshev, D. Červenkov, Martin Ritter, Dmytro Levit, T. Sanuki, Z. P. Zhang, V. Bhardwaj, T. K. Pedlar, Victoria Zhukova, Hyunyong Kim, C. H. Kim, C. H. Li, S. Pardi, S. K. Choi, A. Chen, B. Golob, N. K. Nisar, S. Korpar, V. Savinov, Seongbae Yang, T.-A. Shibata, S. Cunliffe, T. D. Kimmel, P. Križan, N. Dash, Y. Unno, K. Chilikin, R. Kroeger, R. Ayad, Sudhanwa Patra, A. B. Kaliyar, Kohei Ogawa, M. E. Sevior, I. S. Lee, Y. Iwasaki, Y. J. Kwon, Jihwa Lee, L. E. Piilonen, G. Pakhlova, K. Inami, R. Kulasiri, Z. S. Stottler, O. Schneider, M. Merola, J. Schueler, Y. Yusa, R. Pestotnik, M. Takizawa, Kiyoshi Tanida, C. Kiesling, J. K. Ahn, Tao Luo, Z. Drásal, M. Sumihama, K. Trabelsi, M. Bračko, E. Won, J. Libby, J. Kahn, C. P. Shen, A. J. Schwartz, Seok Kim, John Yelton, Z. Doležal, I. Adachi, V. Babu, T. Aushev, T. Ferber, D. Y. Kim, M. Salehi, Y. Seino, V.N. Zhilich, H. Kichimi, K. Miyabayashi, I. Badhrees, W. Sutcliffe, G.V. Russo, Y. Onuki, W. S. Hou, M. Gelb, K. Nishimura, V. M. Aulchenko, Shih-Chang Lee, P. K. Resmi, H. Miyata, Bo Wang, C.-L. Hsu, K. Hayasaka, A. Bobrov, H. E. Cho, A. Frey, Peter Kodys, W. W. Jacobs, S. Di Carlo, G. Karyan, R. Mizuk, C. Beleño, E. Prencipe, S. Al Said, S. Uno, C. Schwanda, Rahul Kumar, A. K. Giri, G. B. Mohanty, M. Nayak, L. Cao, M. Uchida, L. K. Li, G. S. Varner, R. Itoh, A. Rostomyan, P. Wang, D. Joffe, A. Vossen, K. Senyo, Frank Simon, T. Kawasaki, Vladimir Popov, D. Kotchetkov, A. Rabusov, Y. Sakai, E. Solovieva, T. Uglov, A. Kuzmin, S. Ogawa, and E. Waheed
Subjects: Physics, Meson, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Hadron, Analytical chemistry, Resonance, 01 natural sciences, Asymmetry, law.invention, KEKB, law, 0103 physical sciences, B meson, 010306 general physics, Collider, media_common
Abstract: We study charmless hadronic decays of charged B mesons to the final states KS0KS0K± and KS0KS0π± using a 711 fb-1 data sample that contains 772×106 BB¯ pairs and was collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. For B±→KS0KS0K±, the measured branching fraction and direct CP asymmetry are [10.42±0.43(stat)±0.22(syst)]×10-6 and [+1.6±3.9(stat)±0.9(syst)]%, respectively. In the absence of a statistically significant signal for B±→KS0KS0π±, we obtain a 90% confidence-level upper limit on its branching fraction as 8.7×10-7.
Published: 2019

32. Measurements of isospin asymmetry and difference of directCPasymmetries in inclusiveB→Xsγdecays

Author: V. Babu, T. Aushev, Jyoti Prakash Biswal, T. Ferber, T. Matsuda, S. Uno, G. Bonvicini, G. Schnell, S. H. Kim, P. Krokovny, Soumen Paul, Rakesh Kumar, K. Cho, S. Okuno, D. Epifanov, H. Ono, T. Kuhr, B. Pal, R. Mizuk, T. K. Pedlar, Z. P. Zhang, H. B. Jeon, Y. Guan, K. K. Joo, Kevin Varvell, G. B. Mohanty, A. Ishikawa, M. Nakao, R. Van Tonder, Eleonora Guido, P. Pakhlov, T. Mori, H. Aihara, Y. Yusa, Tao Luo, K. Tanida, E. Widmann, J. Libby, D. M. Asner, Toru Iijima, K. Hayasaka, A. Vossen, V. Gaur, T. V. Dong, C. Kiesling, Y. Choi, K. J. Nath, Vikas Bansal, H. Park, A. Bozek, L. Santelj, O. Seon, J. G. Shiu, Y. Seino, Y. Sakai, I. Adachi, M. Bračko, Takeo Kawasaki, Shoichi Watanuki, C. Van Hulse, Bingran Wang, Kohei Ogawa, L. E. Piilonen, D. Cinabro, N. Taniguchi, J. B. Kim, W. Sutcliffe, A. M. Bakich, M. Lubej, B. Bhuyan, Y. B. Li, T. E. Browder, G. Inguglia, V. Zhukova, P. Chang, K. Inami, Tara Nanut, T. Uglov, N. Gabyshev, D. Červenkov, T. Julius, Shih-Chang Lee, A. Frey, M. Iwasaki, A. Bobrov, E. Solovieva, B. G. Cheon, V.E. Shebalin, Somnath Choudhury, R. Ayad, M. Z. Wang, K. Kinoshita, J. Haba, Andrey Sokolov, S. Nishida, V. Savinov, R. Itoh, S. Al Said, D. Kotchetkov, A. Kuzmin, D. Y. Kim, Jochen Dingfelder, B.A. Shwartz, S. Cunliffe, M. Takizawa, Samo Stanič, S. Korpar, K. Nishimura, S. Ogawa, I. Jaegle, M. Merola, D. Liventsev, James E. Fast, Vladimir Zhulanov, Y. Jin, R. Kroeger, I. S. Lee, K. Senyo, P. Goldenzweig, C. Schwanda, H. Hayashii, F. Tenchini, T. Sumiyoshi, Martin Ritter, P. Križan, Massimo Berger, E. Prencipe, K. Chilikin, J. Schueler, E. Won, R. Pestotnik, J. H. Yin, G.V. Russo, W. S. Hou, M. Uchida, L. K. Li, V. Bhardwaj, G. S. Varner, A. Rostomyan, P. Wang, B. G. Fulsom, V.N. Zhilich, S. E. Vahsen, K. Miyabayashi, I. Badhrees, Y. Iwasaki, Y. J. Kwon, O. Schneider, S. Sandilya, A. J. Schwartz, M. Starič, M. Gelb, W. Ostrowicz, Peter Kodys, W. W. Jacobs, S. Di Carlo, G. Karyan, A. K. Giri, S. Jia, M. Masuda, L. Cao, C. Beleño, Yoshinobu Unno, C. H. Wang, A. Garmash, S. Zakharov, H. Ye, A. Zupanc, T. Bilka, G. Pakhlova, M. Watanabe, M. Niiyama, L. Li Gioi, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, and S.I. Eidelman
Subjects: Physics, Particle physics, Annihilation, Meson, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Zero (complex analysis), 01 natural sciences, Asymmetry, KEKB, Isospin, 0103 physical sciences, Production (computer science), 010306 general physics, media_common
Abstract: We report measurements of isospin asymmetry $\Delta_{0-}$ and difference of direct $CP$ asymmetries $\Delta A_{CP}$ between charged and neutral $B \to X_s \gamma$ decays. This analysis is based on the data sample containing $772 \times 10^6 B\bar{B}$ pairs that was collected with the Belle detector at the KEKB energy-asymmetric $e^+ e^-$ collider. Using a sum-of-exclusive technique with invariant $X_s$ mass up to 2.8~GeV/$c^2$, we obtain $\Delta_{0-} = \bigl[-0.48 \pm 1.49 {\rm (stat.)} \pm 0.97 {\rm (syst.)} \pm 1.15 {(f_{+-}/f_{00})}\bigr]$\% and $\Delta A_{CP} = \bigl[+3.69 \pm 2.65 {\rm (stat.)} \pm 0.76{\rm (syst.)}\bigr]$\%, where the last uncertainty for $\Delta_{0-}$ is due to the uncertainty on the production ratio of $B^+B^-$ to $B^0\bar{B}^0$ in $\Upsilon(4S)$ decays. The measured value of $\Delta_{0-}$ is consistent with zero, allowing us to constrain the resolved photon contribution in the $B \to X_s \gamma$, and improve the branching fraction prediction. The result for $\Delta A_{CP}$ is consistent with the prediction of the SM. We also measure the direct $CP$ asymmetries for charged and neutral $B \to X_s \gamma$ decays. All the measurements are the most precise to date.
Published: 2019

33. Observation of B+→pΛ¯K+K− and B+→p¯ΛK+K+

Author: D. Cinabro, M. Lubej, G. Inguglia, G. Schnell, T. Iijima, P. Chang, Somnath Choudhury, T. Kuhr, H. Miyata, M. Uchida, Bo Wang, S. Nishida, J. E. Fast, P. Goldenzweig, M. Sumihama, L. K. Li, D. Liventsev, S. Pardi, J. K. Ahn, K. Hayasaka, X. L. Wang, V. Chekelian, S. Sandilya, Andrey Sokolov, Y. Sakai, S. Okuno, D. Kotchetkov, M. Starič, A. Rabusov, T. Bilka, R. Kroeger, M. E. Sevior, I. S. Lee, G. S. Varner, R. Van Tonder, B. K. Pal, Eleonora Guido, H. Ono, V. Babu, M. Watanabe, E. Solovieva, D. Joffe, J. Libby, A. Vossen, Frank Simon, Vladimir Popov, R. Itoh, A. Rostomyan, S. Eidelman, T. Matsuda, G. Bonvicini, L. Li Gioi, Shih-Chang Lee, Y. Seino, P. Pakhlov, S. E. Vahsen, A. Vinokurova, T. Aushev, H. Ye, Shoichi Watanuki, V.N. Zhilich, H. Park, A. Bozek, P. Krokovny, M. Merola, A. B. Kaliyar, C. B. Van Hulse, M. Z. Wang, K. Kinoshita, Y. Iwasaki, Y. J. Kwon, D. Matvienko, K. Cho, V. V. Zhulanov, O. Schneider, B. Shwartz, U. Tamponi, T. Ferber, R. B. Garg, B. Bhuyan, K. Miyabayashi, I. Badhrees, D. Epifanov, Shigeki Hirose, M. Takizawa, S. Jia, E. Won, B. G. Fulsom, T. E. Browder, A. Garmash, V. Bansal, A. K. Giri, W. Sutcliffe, Z. Doležal, C. H. Wang, V. Savinov, P. K. Behera, H. Atmacan, S. Paul, A. Zupanc, Y. Unno, J. B. Kim, Tara Nanut, M. Gelb, J. H. Yin, J. G. Shiu, R. Ayad, K. T. Kim, T. Uglov, J. B. Singh, S. K. Choi, Massimo Berger, N. K. Nisar, Tao Luo, K. Tanida, V. M. Aulchenko, H. K. Moon, J. S. Lange, M. Masuda, G. B. Mohanty, C. Z. Yuan, E. Prencipe, G.V. Russo, S. Cunliffe, K. Senyo, W. S. Hou, I. Adachi, V. Vorobyev, C. P. Shen, H. Hayashii, Seok Kim, M. Salehi, Hyunyong Kim, T. Kawasaki, Victoria Zhukova, T.-A. Shibata, A. M. Bakich, H. Kichimi, R. Mussa, P. C. Lu, H. B. Jeon, L. Cao, A. Chen, A. Kuzmin, M. C. Chang, Phillip Urquijo, K. Inami, S. Ogawa, Z. Drásal, C.-L. Hsu, A. Ishikawa, Y. B. Li, D. M. Asner, K. Chilikin, H. Ozaki, Peter Kodys, W. W. Jacobs, P. Križan, F. Tenchini, S. Di Carlo, N. Gabyshev, D. Červenkov, R. Mizuk, R. Pestotnik, C. Beleño, M. Iwasaki, T. Sumiyoshi, B. G. Cheon, Martin Ritter, T. Sanuki, Eberhard Widmann, L. E. Piilonen, J. Haba, G. Pakhlova, J. F. Strube, R. Kulasiri, S. Korpar, D. Y. Kim, T. Julius, N. Dash, R. Chistov, K. K. Joo, C. Kiesling, T. V. Dong, M. Bračko, Y. Choi, K. J. Nath, L. Santelj, Z. Natkaniec, Jyoti Prakash Biswal, V. Gaur, S. Al Said, M. Nakao, S. Uno, C. Schwanda, V. Bhardwaj, T. K. Pedlar, Y.-T. Lai, M. Nayak, T. Mori, H. Aihara, Ya-Qiu Jin, Y. Usov, Z. P. Zhang, and V.E. Shebalin
Subjects: Physics, KEKB, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, Resonance, 010306 general physics, Lambda, 01 natural sciences, Bar (unit)
Abstract: We report the study of B+→pΛ¯K+K- and B+→p¯ΛK+K+ decays using a 772×106 BB¯ pair data sample recorded on the ϒ(4S) resonance with the Belle detector at KEKB. The following branching fractions are measured: B(B+→pΛ¯K+K-)=(4.10-0.43+0.45±0.50)×10-6, B(B+→p¯ΛK+K+)=(3.70-0.37+0.39±0.44)×10-6, B(ηc→pΛ¯K-+c.c.)=(2.83-0.34+0.36±0.35)×10-3 and B(B+→pΛ¯ϕ)=( 7.95±2.09±0.77)×10-7, where c.c. denotes the corresponding charge-conjugation process. The intermediate resonance decays are excluded in the four-body decay measurements. We also find evidence for B(ηc→Λ(1520)Λ¯+c.c.)=(3.48±1.48±0.46)×10-3 and B(B+→Λ(1520)Λ¯K+)=( 2.23±0.63±0.25)×10-6. No significant signals are found for J/ψ→Λ(1520)Λ¯+c.c. and B+→Λ¯(1520)ΛK+; we set the 90% confidence level upper limits on their decay branching fractions as
Published: 2019

34. Observation of Transverse Λ/Λ¯ Hyperon Polarization in e+e− Annihilation at Belle

Author: Vikas Bansal, I. Badhrees, H. Aihara, C. Van Hulse, S. Hirose, A. M. Bakich, Z. Natkaniec, A. Zupanc, T. Matsuda, S. Uno, N. Gabyshev, D. Červenkov, T. Sumiyoshi, S. E. Vahsen, G. Pakhlova, Rocky Bala Garg, Eberhard Widmann, R. Mussa, H. B. Jeon, J. K. Ahn, M. Niiyama, T. Mori, Y. Iwasaki, Y. J. Kwon, T. A. Shibata, H. Miyata, Y. Usov, G. Bonvicini, A. Ishikawa, Y. Seino, M. Nakao, Prafulla Kumar Behera, P. Križan, C. Beleño, M. Iwasaki, O. Schneider, Jyoti Prakash Biswal, M. Z. Wang, K. Kinoshita, G. Schnell, D. Matvienko, Byung Gu Cheon, I. Jaegle, R. Ayad, T. Iijima, L. Li Gioi, T. Julius, B. G. Fulsom, S. Al Said, A. Vinokurova, J. G. Shiu, H. Park, K. Cho, W. Sutcliffe, Yoshinobu Unno, A. Bozek, Vladimir Popov, Shih-Chang Lee, G. B. Mohanty, J. F. Strube, T. Kuhr, K. Senyo, S. H. Kim, Massimo Berger, R. Seidl, R. Itoh, B. Bhuyan, C. Kiesling, M. Nayak, Dipak Kumar Sahoo, Peter Kodys, C. Z. Yuan, W. W. Jacobs, T. E. Browder, K. H. Kang, S. Sandilya, Y. Yusa, S. Korpar, G.V. Russo, S. Cunliffe, H. J. Kim, D. Joffe, A. Bobrov, M. Bračko, E. Prencipe, M. Uchida, M. Gelb, L. K. Li, S. Di Carlo, T. K. Pedlar, V. Savinov, M. Salehi, N. K. Nisar, M. Takizawa, A. Garmash, Y. Guan, Andrey Sokolov, D. Epifanov, A. K. Giri, A. Chen, V. Bhardwaj, B. Pal, Z. P. Zhang, K. Inami, W. S. Hou, M. Masuda, M. Merola, C. Schwanda, Iki Adachi, James E. Fast, Doo Young Kim, D. Cinabro, K. Chilikin, V. Babu, T. V. Dong, L. Cao, Y. Choi, K. J. Nath, Semen Eidelman, X. L. Wang, Tagir Aushev, V. Chekelian, L. Santelj, J. B. Kim, V. Vorobyev, R. Van Tonder, Eleonora Guido, Phillip Urquijo, A. Rostomyan, P. Wang, T. Ferber, E. Won, V.E. Shebalin, Y. Sakai, R. Pestotnik, H. Hayashii, Z. Drásal, Y. B. Li, V. Gaur, J. H. Yin, V.M. Aulchenko, G. Varner, Ken Suzuki, Soumen Paul, H. Ono, R. Mizuk, H. Atmacan, B. Golob, H. K. Moon, J. S. Lange, Takuro Sanuki, Kiyoshi Tanida, R. Kulasiri, K. K. Joo, Pavel Krokovny, M. Sumihama, John Yelton, Z. Doležal, K. T. Kim, T. Bilka, S. K. Choi, C. P. Shen, Tara Nanut, T. Uglov, H. Ye, A. Kuzmin, S. Ogawa, F. Tenchini, U. Tamponi, E. Waheed, S. Jia, J. Libby, D. M. Asner, K. Hayasaka, Y. Jin, C. H. Wang, Takeo Kawasaki, Shoichi Watanuki, S. Pardi, S. Okuno, M. Lubej, G. Inguglia, V. Zhukova, P. Chang, J. Haba, P. Pakhlov, Tao Luo, S. Nishida, Bingran Wang, A. Rabusov, K. Adamczyk, Jochen Dingfelder, M. Starič, D. Liventsev, Vladimir Zhulanov, R. Kroeger, M. E. Sevior, I. S. Lee, P. Goldenzweig, N. Dash, D. Kotchetkov, Leo Piilonen, A. Vossen, O. Seon, Frank Simon, E. Solovieva, and V.N. Zhilich
Subjects: Physics, Particle physics, Annihilation, Electron–positron annihilation, Hyperon, General Physics and Astronomy, Polarization (waves), Lambda, 01 natural sciences, Belle experiment, Nuclear physics, Transverse plane, 0103 physical sciences, Fragmentation function, 010306 general physics
Abstract: We report the first observation of the spontaneous polarization of Λ and Λ[over ¯] hyperons transverse to the production plane in e^{+}e^{-} annihilation, which is attributed to the effect arising from a polarizing fragmentation function. For inclusive Λ/Λ[over ¯] production, we also report results with subtracted feed-down contributions from Σ^{0} and charm. This measurement uses a dataset of 800.4 fb^{-1} collected by the Belle experiment at or near a center-of-mass energy of 10.58 GeV. We observe a significant polarization that rises with the fractional energy carried by the Λ/Λ[over ¯] hyperon.
Published: 2019

35. Search for CP violation with kinematic asymmetries in the D0→K+K−π+π− decay

Author: L. Li Gioi, D. Matvienko, S. Eidelman, Eberhard Widmann, J. F. Strube, L. E. Piilonen, G. Pakhlova, Jyoti Prakash Biswal, H. Ye, H. Yamamoto, T. Matsuda, R. Kroeger, I. S. Lee, A. Garmash, Daniel Greenwald, V. Bansal, R. Kulasiri, D. Cinabro, K. Prasanth, Tao Luo, K. Tanida, H. Park, A. Bozek, Victoria Zhukova, J. K. Lee, A. Chen, P. K. Resmi, T. Uglov, Y. Iwasaki, Y. J. Kwon, H. Kichimi, S. K. Choi, G. Schnell, Y.-T. Lai, Z. J. Liptak, A. M. Bakich, V. Gaur, R. Mussa, P. C. Lu, T. Iijima, B. G. Cheon, M. Lubej, G. Inguglia, K. Chilikin, M. Nakao, P. Chang, M. Nayak, A. Ishikawa, P. K. Behera, O. Schneider, P. Krokovny, P. Križan, J. MacNaughton, Jihwa Lee, N. Gabyshev, D. Červenkov, J. E. Fast, K. Cho, Y. Sakai, Ya-Qiu Jin, J. Haba, R. Pestotnik, E. Won, R. B. Garg, A. Frey, B. Bhuyan, M. Merola, Seema Bahinipati, T. V. Dong, D. Epifanov, Y. Unno, B. G. Fulsom, Y. Choi, I. Adachi, H. Atmacan, C. Kiesling, T. Bilka, M. Uchida, S. Korpar, P. Goldenzweig, J. Libby, S. Sandilya, K. J. Nath, S. Ogawa, M. Salehi, V. V. Zhulanov, N. Dash, M. Mrvar, T. K. Pedlar, L. K. Li, M. Bračko, T. Hara, E. Nakano, M. Starič, L. Santelj, C. Z. Yuan, V. Savinov, Y. Tao, T. Mori, H. Aihara, Peter Kodys, M. Sumihama, J. G. Shiu, Y. Seino, E. Prencipe, S. Jia, D. Liventsev, Motoki Iwasaki, D. Y. Kim, Phillip Urquijo, S. Cunliffe, M. Gelb, S. Pardi, S. Nishida, E. Solovieva, S. Al Said, C. H. Wang, N. K. Nisar, H. K. Moon, S. Paul, J. S. Lange, Z. P. Zhang, Y. B. Li, G. S. Varner, Y. Guan, D. M. Asner, X. L. Wang, C. H. Li, V. Chekelian, G.V. Russo, S. Di Carlo, W. Sutcliffe, G. Karyan, R. Itoh, D. Kotchetkov, A. Rostomyan, R. Van Tonder, B. K. Pal, M. Takizawa, W. S. Hou, P. Wang, Alexei Kuzmin, A. Rabusov, K. Lalwani, Z. Doležal, V. M. Aulchenko, K. Senyo, T. Kawasaki, S. Uno, C. Schwanda, J. B. Kim, D. Joffe, Seongbae Yang, Shih-Chang Lee, O. Seon, Vladimir Popov, A. K. Giri, F. Tenchini, T. Sumiyoshi, M. Masuda, V.N. Zhilich, Martin Ritter, G. B. Mohanty, T. Sanuki, K. Miyabayashi, I. Badhrees, Y. Yusa, L. Cao, R. Mizuk, C. Beleño, C. P. Shen, Seok Kim, V. Babu, T. Aushev, T. Ferber, Bo Wang, K. Hayasaka, A. Bobrov, T.-A. Shibata, K. Inami, M. Z. Wang, K. Kinoshita, H. Hayashii, and Hyunyong Kim
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, media_common.quotation_subject, High Energy Physics::Phenomenology, 01 natural sciences, Measure (mathematics), Asymmetry, Luminosity, law.invention, Pseudoscalar, KEKB, law, 0103 physical sciences, CP violation, High Energy Physics::Experiment, 010306 general physics, Collider, media_common
Abstract: We search for CP violation in the singly-Cabibbo-suppressed decay D0→K+K-π+π- using data corresponding to an integrated luminosity of 988 fb-1 collected by the Belle detector at the KEKB e+e- collider. We measure a set of five kinematically dependent CP asymmetries, of which four asymmetries are measured for the first time. The set of asymmetry measurements can be sensitive to CP violation via interference between the different partial-wave contributions to the decay and performed on other pseudoscalar decays. We find no evidence of CP violation.
Published: 2019

36. Measurement of time-dependent CP violation in B0→KS0π0π0 decays

Author: S. Al Said, K. T. Kim, K. Chilikin, V.N. Zhilich, T. Matsuda, S. K. Choi, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, G.V. Russo, Y. Iwasaki, Y. J. Kwon, Y. Guan, S. Uno, S.I. Eidelman, C. Schwanda, R. Pestotnik, Jyoti Prakash Biswal, A. Vossen, U. Tamponi, O. Seon, N. Dash, F. Tenchini, D. Kotchetkov, K. Miyabayashi, I. Badhrees, V. Gaur, G. B. Mohanty, V. Babu, T. Aushev, T. Sumiyoshi, Yoshinobu Unno, H. Atmacan, O. Schneider, S. H. Kim, Tao Luo, S. Jia, Rakesh Kumar, K. Tanida, Y. Yusa, G. Schnell, V. Vorobyev, T. Sanuki, K. H. Kang, M. Merola, B. Bhuyan, J. Libby, D. M. Asner, C. H. Wang, T. E. Browder, A. Chen, V.M. Aulchenko, L. Li Gioi, T. Kuhr, K. Hayasaka, M. Takizawa, Z. Drásal, J. H. Yin, S. Cunliffe, H. Ye, K. Senyo, N. K. Nisar, M. Z. Wang, K. Kinoshita, Vikas Bansal, Peter Kodys, W. W. Jacobs, Y. Seino, E. Nakano, D. Epifanov, B. Pal, T. K. Pedlar, Bingran Wang, C. Kiesling, Vladimir Popov, S. Di Carlo, B. Golob, S. Ogawa, M. Sumihama, C. Van Hulse, Z. P. Zhang, V. Savinov, D. Cinabro, H. K. Moon, A. K. Giri, S. Hirose, J. S. Lange, E. Waheed, J. G. Shiu, A. Garmash, T. Kawasaki, M. Lubej, G. Inguglia, M. Uchida, L. E. Piilonen, M. Masuda, Y. B. Li, L. K. Li, G. Pakhlova, V. Bhardwaj, C. P. Shen, Shih-Chang Lee, M. Iwasaki, M. Bračko, B. G. Cheon, Kohei Ogawa, G. S. Varner, E. Prencipe, K. Inami, E. Won, R. Itoh, A. J. Schwartz, D. Liventsev, L. Cao, Y. Ushiroda, S. Pardi, S. Korpar, Vladimir Zhulanov, A. Rostomyan, P. Wang, Y. Jin, R. Kroeger, B. G. Fulsom, H. Park, A. Bozek, Rocky Bala Garg, Kevin Varvell, M. E. Sevior, I. S. Lee, Tara Nanut, P. Goldenzweig, T. Uglov, H. Hayashii, H. Aihara, Y. Usov, J. Haba, K. Nishimura, James E. Fast, H. Ono, R. Mizuk, R. Ayad, Seema Bahinipati, D. Y. Kim, J. B. Kim, S. Sandilya, S. Nishida, A. M. Bakich, M. Starič, Soumen Paul, Z. Natkaniec, V. Chekelian, A. Ishikawa, R. Van Tonder, M. Nakao, P. Križan, K. K. Joo, D. Červenkov, T. V. Dong, Y. Choi, K. J. Nath, and Y. Sakai
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Resonance, 01 natural sciences, Belle experiment, law.invention, Amplitude, KEKB, law, 0103 physical sciences, CP violation, 010306 general physics, Collider
Abstract: We report a measurement of time-dependent CP violation in B0→KS0π0π0 decays using a data sample of 772×106 BB¯ pairs collected by the Belle experiment running at the ϒ(4S) resonance at the KEKB e+e- collider. This decay proceeds mainly via a b→sdd¯ “penguin” amplitude. The results are sin2ϕ1eff=0.92-0.31+0.27 (stat.) ±0.11 (syst.) and A=0.28±0.21 (stat.) ±0.04 (syst.), which are the most precise measurements of CP violation in this decay mode to date. The value for the CP-violating parameter sin2ϕ1eff is consistent with that obtained using decay modes proceeding via a b→cc¯s “tree” amplitude.
Published: 2019

37. First Evidence for cos2β>0 and Resolution of the Cabibbo-Kobayashi-Maskawa Quark-Mixing Unitarity Triangle Ambiguity

Author: V. B. Golubev, K. Chilikin, L. Zani, J. R. Wilson, Iki Adachi, T. S. Miyashita, Doo Young Kim, A. Palano, S. Emery, M. Feindt, J. B. Kim, K. Griessinger, D. Epifanov, A. Hafner, W. R. Innes, David Hutchcroft, O. Long, R. Cenci, Brian Meadows, J. M. Izen, M. Bellis, Eleonora Guido, H. Neal, K. Inami, H. Ye, R. Kass, S. Martellotti, D. W G S Leith, G. Schnell, E. Won, R. Pestotnik, S. Nishida, A. Calcaterra, J. P. Coleman, J. A. McKenna, T. E. Browder, J. Ocariz, M. T. Graham, F. Ferroni, R. J. Sobie, A. Roodman, S. Pardi, J. L. Ritchie, Noritaka Shimizu, Vikas Bansal, Eleonora Luppi, A. Beaulieu, Tara Nanut, T. Uglov, A. V. Gritsan, G. Wormser, A. G. Denig, Vitaly Vorobyev, B. N. Ratcliff, R. Y. So, T. Kuhr, S. R. Wagner, G. De Nardo, H. M. Lacker, M. Starič, D. Liventsev, E. Nakano, Z. Drásal, V. Savinov, D. J. Summers, C. H. Cheng, H. Ono, D. A. Roberts, S. Al Said, T. Matsuda, A. J S Smith, D. S. Chao, Vladimir Zhulanov, R. Kroeger, E. Ben-Haim, M. E. Sevior, I. S. Lee, S. J. Sekula, C. Bozzi, R. Mizuk, M. Piccolo, F. Di Lodovico, S. Uno, R. Kulasiri, T. Schroeder, A. J. Lankford, S. Sandilya, R. Godang, P. Goldenzweig, P. Pakhlov, N. Tasneem, J. Albert, G.V. Russo, J. Cochran, Yu. G. Kolomensky, H. Hayashii, J. Libby, C. Van Hulse, T. A. Shibata, Z. C. Huard, U. Tamponi, S. Passaggio, H. Miyata, B. Pal, Y. B. Li, Marcin Chrzaszcz, F. Le Diberder, Michael Sokoloff, Ray Franklin Cowan, P. C. Kim, F. U. Bernlochner, P. Patteri, Prafulla Kumar Behera, W. S. Hou, I. M. Peruzzi, B. Oberhof, F. Simonetto, J. G. Shiu, G. J. King, V. Babu, K. T. Kim, J. K. Ahn, A. Soffer, M. Z. Wang, K. Kinoshita, B. Bhuyan, N. Guttman, H. Park, A. Bozek, S. H. Kim, J. Dorfan, M. Gelb, H. Koch, Vladimir Popov, A. Zallo, S. Jia, D. N. Brown, R. Stroili, R. Ayad, K. Cho, C. Hearty, M. Iwasaki, P. K. Resmi, Marcello Rotondo, B. G. Cheon, James E. Fast, A. Kuzmin, M. Ebert, T. K. Pedlar, T. Kumita, K. Yu. Todyshevx, F. Forti, Y. Choi, K. J. Nath, E. A. Kravchenko, L. Santelj, K. H. Kang, T. Leddig, Shih-Chang Lee, D. Matvienko, C. Voß, M. Bomben, J. Haba, Dominik Müller, X. C. Lou, C. Chen, G. Finocchiaro, C. Z. Yuan, Y. Jin, A. J. Schwartz, C. H. Wang, Alberto Lusiani, Semen Eidelman, E. Grauges, L. Vitale, S. Ogawa, A. Rossi, Y. Watanabe, J. P. Lees, A. Filippi, S. E. Vahsen, G. A. Cowan, C. Bünger, C. Sciacca, R. C. Field, Gabriele Simi, G. Eigen, R. Gorodeisky, F. Martinez-Vidal, J. J. Walsh, C. Schwanda, R. Itoh, H. Ahmed, D. Cinabro, Tao Luo, F. Tenchini, Th. Müller, G. Rizzo, Y. Sakai, D. Bernard, J. Chauveau, S. I. Serednyakov, F. Palombo, S. Korpar, E. Gabathuler, T. Ferber, Tagir Aushev, C. Cartaro, Y. Onuki, A. Jawahery, M. Nayak, G. Cibinetto, M. K. Sullivan, M. Margoni, Y. Guan, A. Oyanguren, E. Waheed, R. M. Seddon, Nicola Neri, J. W. Gary, V. Gaur, W. Panduro Vazquez, Y. Iwasaki, C. Touramanis, S. Luitz, K. R. Schubert, P. Taras, S. Hirose, D. J. Payne, E. Fioravanti, Y. Li, Y. J. Kwon, V.N. Zhilich, F. Ferrarotto, E. M. T. Puccio, G. B. Mohanty, P. L. Wang, B. Golob, T. Lueck, Roland Waldi, Biplab Dey, Peter Kodys, Fergus Wilson, M. A. Giorgi, E. Paoloni, A. Zupanc, F. De Mori, A. B. Kaliyar, P. F. Harrison, H. Kichimi, D. G. Hitlin, H. K. Moon, M. R. Convery, A. Chen, F. Bianchi, G. Piredda, O. Schneider, U. Mallik, R. Cheaib, Y. Yusa, Bingran Wang, M. Röhrken, K. Senyo, J. S. Lange, V. Santoro, W. J. Wisniewski, C. Hast, W. W. Jacobs, A. M. Eisner, I. M. Nugent, M. T. Hedges, M. Carpinelli, K. Miyabayashi, I. Badhrees, M. Posocco, B. G. Fulsom, R. F. Schwitters, G. Varner, R. Mussa, A. M. Lutz, K. T. Flood, G. Casarosa, Simon Akar, M. Takizawa, Pavel Krokovny, R. Calabrese, V. E. Blinov, A. R. Buzykaev, A. Ishikawa, G. Vasseur, Roger Barlow, Ju-Young Kim, Miriam Heß, Y. Seino, S. Bettarini, R. de Sangro, M. Nakao, M. Biasini, P. Križan, G. Raven, Alexander Bondar, D. Gamba, R. Sacco, L. Cremaldi, Yu. I. Skovpen, C. P. Shen, K. Honscheid, G. Calderini, Elisa Manoni, R. Kowalewski, N. Arnaud, V.E. Shebalin, M. Heck, L. K. Li, M. V. Purohit, S. Di Carlo, D. M. Asner, K. Hayasaka, Sw. Banerjee, Soumen Paul, M. Uchida, G. Pakhlova, P. R. Burchat, G. Karyan, V. Bhardwaj, C. L. Hsu, J. A. Ernst, S. L. Wu, P. Ongmongkolkul, H. Atmacan, D. B. Macfarlane, Alessandro Pilloni, K. K. Joo, S. Dittrich, D. R. Peimer, Kiyoshi Tanida, Timothy Gershon, D. Aston, L. Li Gioi, A. Garmash, F. Anulli, Z. Doležal, J. M. Roney, Yoshinobu Unno, S. Zakharov, M. Lubej, G. Inguglia, V. Zhukova, M. Merola, A. K. Giri, K. Sumisawa, S. M. Spanier, G. Batignani, M. Masuda, C. L. Davis, M. Fritsch, A. P. Onuchin, L. Sun, Adrian John Bevan, Somnath Choudhury, Leo Piilonen, O. Seon, Frank Simon, D. J. Lange, Matteo Rama, James G. Smith, V. P. Druzhinin, D. M. Wright, M. S. Alam, E. Solovieva, R. Prepost, N. Dash, M. Rozanska, D. Kotchetkov, T. Adye, A. Randle-Conde, T. Julius, M. Verderi, R. Faccini, V. Poireau, T. Sumiyoshi, J. M. Losecco, G. Marchiori, F. C. Porter, Martin Ritter, T. Sanuki, S. Cunliffe, J. Va'Vra, W. S. Lockman, M. Salehi, H. Aihara, George Lafferty, C. P. Jessop, T. Hara, T. Mori, Oliver Grünberg, G. R. Bonneaud, N. K. Nisar, I. Pavelkin, D. Bettoni, Z. P. Zhang, S. Prell, B. G. Pushpawela, A. Gaz, S. H. Robertson, L. Lanceri, Jyoti Prakash Biswal, B. Echenard, M. Davier, J. MacNaughton, A. M. Bakich, W. Dunwoodie, D. Červenkov, Rocky Bala Garg, T. S. Mattison, W. Gradl, E. P. Solodov, I. Garzia, Thomas Latham, C. Patrignani, V. Tisserand, and M. Bračko
Subjects: Quark, Physics, Particle physics, Unitarity, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, General Physics and Astronomy, Dalitz plot, 01 natural sciences, B-factory, KEKB, 0103 physical sciences, CP violation, 010306 general physics
Abstract: We present first evidence that the cosine of the CP-violating weak phase 2β is positive, and hence exclude trigonometric multifold solutions of the Cabibbo-Kobayashi-Maskawa (CKM) Unitarity Triangle using a time-dependent Dalitz plot analysis of B^{0}→D^{(*)}h^{0} with D→K_{S}^{0}π^{+}π^{-} decays, where h^{0}∈{π^{0},η,ω} denotes a light unflavored and neutral hadron. The measurement is performed combining the final data sets of the BABAR and Belle experiments collected at the ϒ(4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10^{6}BB[over ¯] pairs recorded by the BABAR detector and (772±11)×10^{6}BB[over ¯] pairs recorded by the Belle detector. The results of the measurement are sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle β of the CKM Unitarity Triangle is β=[22.5±4.4(stat)±1.2(syst)±0.6(model)]°. The measurement assumes no direct CP violation in B^{0}→D^{(*)}h^{0} decays. The quoted model uncertainties are due to the composition of the D^{0}→K_{S}^{0}π^{+}π^{-} decay amplitude model, which is newly established by performing a Dalitz plot amplitude analysis using a high-statistics e^{+}e^{-}→cc[over ¯] data sample. CP violation is observed in B^{0}→D^{(*)}h^{0} decays at the level of 5.1 standard deviations. The significance for cos2β>0 is 3.7 standard deviations. The trigonometric multifold solution π/2-β=(68.1±0.7)° is excluded at the level of 7.3 standard deviations. The measurement resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle.
Published: 2018

38. Measurement of cos2β in B0→D(*)h0 with D→KS0π+π− decays by a combined time-dependent Dalitz plot analysis of BaBar and Belle data

Author: C. Bünger, T. Matsuda, J. W. Gary, T. S. Mattison, S. H. Kim, S. J. Sekula, A. Jawahery, P. Krokovny, M. Feindt, I. Adachi, D. B. MacFarlane, C. Hearty, P. Goldenzweig, K. H. Kang, K. Cho, S. Sandilya, A. G. Denig, R. F. Schwitters, M. Rozanska, D. Kotchetkov, E. Fioravanti, B. Golob, F. Palombo, T. Lueck, P. Pakhlov, J. B. Kim, K. Yu. Todyshevx, T. Leddig, D. Epifanov, N. K. Nisar, J. S. Lange, Z. C. Huard, V.N. Zhilich, Shih-Chang Lee, W. S. Lockman, M. R. Convery, D. N. Brown, A. Calcaterra, M. Z. Wang, K. Kinoshita, D. J. Summers, A. Filippi, H. Park, A. Bozek, Simon Akar, R. Prepost, R. Mussa, D. Gamba, M. Bellis, A. Ishikawa, F. De Mori, J. E. Fast, Cheng Chen, M. Starič, N. Tasneem, G.V. Russo, J. P. Coleman, F. Anulli, Alessandro Gaz, S. H. Robertson, Aidan Randle-Conde, W. S. Hou, G. J. King, Victoria Zhukova, F. F. Wilson, R. J. Sobie, L. Vitale, B. T. Meadows, P. Križan, G. Raven, Denis Bernard, S. Nishida, K. Miyabayashi, I. Badhrees, R. Ayad, James R. Wilson, V. Bhardwaj, R. Cowan, E. A. Kravchenko, Elisa Guido, J. L. Ritchie, Herbert Koch, T. K. Pedlar, A. P. Onuchin, A. Chen, S. Martellotti, F. Martinez-Vidal, Marco Bomben, M. D. Sokoloff, S. E. Vahsen, A. J. S. Smith, P. R. Burchat, R. Calabrese, C. Cartaro, M. Rotondo, V. Vorobyev, U. Mallik, I. Pavelkin, G. Schnell, D. Cinabro, K. Griessinger, M. Iwasaki, D. Matvienko, P. F. Harrison, G. Cibinetto, A. Oyanguren, E. Luppi, S. Emery, M. Merola, Peter S. Kim, T. S. Miyashita, N. Neri, G. Vasseur, E. Paoloni, D. Y. Kim, B. K. Pal, B. G. Cheon, K. T. Kim, L. M. Cremaldi, R. B. Garg, B. Bhuyan, A. V. Gritsan, Shigeki Hirose, K. T. Flood, A. M. Eisner, Y. Iwasaki, R. Godang, Tao Luo, K. Tanida, F. Di Lodovico, B. G. Fulsom, G. De Nardo, J. Chauveau, M. T. Hedges, A. B. Kaliyar, J. K. Ahn, Y. J. Kwon, G. Eigen, I. M. Nugent, V. E. Blinov, S. Bettarini, T. E. Browder, D. J. Payne, M. Ebert, A. J. Bevan, M. Röhrken, K. Chilikin, H. M. Lacker, Tara Nanut, T. Kuhr, T. A. Shibata, H. Miyata, T. Aushev, R. Sacco, A. J. Schwartz, E. Grauges, V. V. Zhulanov, G. Inguglia, O. Schneider, T. Uglov, V. Savinov, A. Palano, C. P. Jessop, S. M. Spanier, Alessandro Pilloni, J. Ocariz, R. Mizuk, Mario Giorgi, M. Heß, H. Kichimi, E. Won, M. K. Sullivan, Yu. G. Kolomensky, D. W. G. S. Leith, H. Atmacan, J. P. Lees, D. R. Peimer, H. Ono, D. G. Hitlin, Bingran Wang, S. Zakharov, Semen Eidelman, David Hutchcroft, L. Li Gioi, A. Zupanc, Wu S. L., K. Hayasaka, G. Calderini, E. Nakano, F. Simonetto, J. Va’vra, D. S. Chao, M. Davier, R. Cenci, R. Cheaib, R. Waldi, A. Zallo, S. Korpar, V. P. Druzhinin, C. Bozzi, G. Cowan, Noritaka Shimizu, J. M. LoSecco, M. V. Purohit, Douglas Wright, L. Zani, R. Gorodeisky, P. Patteri, M. Fritsch, D. A. Roberts, Yu. I. Skovpen, B. Dey, P. Ongmongkolkul, K. Honscheid, M. Piccolo, F. Forti, J. J. Walsh, R. Kroeger, M. E. Sevior, I. S. Lee, A. M. Lutz, R. J. Barlow, R. Stroili, M. T. Graham, A. Hafner, J. M. Roney, Z. Drásal, J. Albert, K. Senyo, E. M. T. Puccio, X. C. Lou, G. Batignani, V.E. Shebalin, Somnath Choudhury, N. Guttman, A. Kuzmin, J. G. Shiu, G. Wormser, K. K. Joo, Y. Unno, M. Posocco, J. G. Smith, S. Al Said, K. Inami, C. Z. Yuan, J. Cochran, E. Ben-Haim, C. Hast, M. Heck, D. J. Lange, G. Piredda, Hamad Ahmed, W. J. Wisniewski, G. Marchiori, S. Ogawa, G. D. Lafferty, Y. B. Li, H. A. Neal, V. Santoro, J. Libby, M. Lubej, W. Dunwoodie, A. M. Rossi, S. Passaggio, W. Panduro Vazquez, S. Uno, C. Schwanda, Tim Adye, V. B. Golubev, U. Tamponi, Y. Choi, K. J. Nath, G. Casarosa, L. Santelj, E. Waheed, R. D. Kass, A. Roodman, R. Faccini, F. Ferrarotto, A. J. Lankford, F. Le Diberder, S. Jia, R. M. Seddon, J. M. Izen, Crisostomo Sciacca, D. Aston, M. Nayak, M. Uchida, F. Ferroni, A. R. Buzykaev, G. Rizzo, M. Rama, L. Lanceri, So R. Y., A. Beaulieu, Y. Seino, J. A. McKenna, C. H. Cheng, T. J. Gershon, D. Liventsev, Y. Jin, C. H. Wang, S. Paul, Martino Margoni, S. Pardi, T. Müller, K. Sumisawa, D. M. Asner, T. E. Latham, M. Carpinelli, Ju-Young Kim, Maurizio Biasini, D. R. Muller, G. S. Varner, R. de Sangro, Stephen Robert Wagner, Y. Yusa, K. R. Schubert, A. K. Giri, Tamara Vazquez Schroeder, R. Itoh, C. L. Davis, Elisa Manoni, Li L. K., I. M. Peruzzi, Owen Rosser Long, M. Masuda, C. B. Van Hulse, G. B. Mohanty, J. A. Ernst, S. I. Serednyakov, F. Bianchi, L. Sun, S. Dittrich, P. K. Resmi, M. Gelb, Pu Wang, R. Kowalewski, Peter Kodys, A. Garmash, W. W. Jacobs, V. Bansal, G. R. Bonneaud, J. Dorfan, S. Di Carlo, G. Karyan, P. K. Behera, M. Verderi, N. Arnaud, A.E. Bondar, M. Takizawa, C. Touramanis, Z. Doležal, O. Grünberg, P. Taras, E. P. Solodov, O. Seon, Frank Simon, Y. Sakai, S. Prell, I. Garzia, V. Poireau, A. Soffer, A. Lusiani, N. Dash, E. Solovieva, Li Y. B., R. C. Field, G. Finocchiaro, M. S. Alam, S. Cunliffe, B. Oberhof, L. E. Piilonen, G. Pakhlova, R. Kulasiri, T. Hara, T. Julius, W. Gradl, T. Mori, H. Aihara, B. N. Ratcliff, S. Luitz, F. Tenchini, T. Sumiyoshi, Martin Ritter, Z. P. Zhang, T. Sanuki, B. G. Pushpawela, Jyoti Prakash Biswal, D. Bettoni, V. Gaur, M. Nakao, B. Echenard, Florian Urs Bernlochner, J. MacNaughton, C. Patrignani, V. Tisserand, M. Bračko, A. M. Bakich, Sw. Banerjee, G. Simi, D. Červenkov, E. Gabathuler, W. R. Innes, F. C. Porter, M. Chrzaszcz, and C. Voß
Subjects: Physics, Particle physics, Unitarity, Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, Dalitz plot, 01 natural sciences, B-factory, KEKB, 0103 physical sciences, CP violation, 010306 general physics
Abstract: We report measurements of sin2β and cos2β using a time-dependent Dalitz plot analysis of B0→D(*)h0 with D→KS0π+π- decays, where the light unflavored and neutral hadron h0 is a π0, η, or ω meson. The analysis uses a combination of the final data sets of the BaBar and Belle experiments containing 471×106 and 772×106 BB¯ pairs collected at the ϒ(4S) resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. We measure sin2β=0.80±0.14(stat)±0.06(syst)±0.03(model) and cos2β=0.91±0.22(stat)±0.09(syst)±0.07(model). The result for the direct measurement of the angle is β=(22.5±4.4(stat)±1.2(syst)±0.6(model))°. The last quoted uncertainties are due to the composition of the D0→KS0π+π- decay amplitude model, which is newly established by a Dalitz plot amplitude analysis of a high-statistics e+e-→cc¯ data sample as part of this analysis. We find the first evidence for cos2β>0 at the level of 3.7 standard deviations. The measurement excludes the trigonometric multifold solution π/2-β=(68.1±0.7)° at the level of 7.3 standard deviations and therefore resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle. The hypothesis of β=0° is ruled out at the level of 5.1 standard deviations, and thus CP violation is observed in B0→D(*)h0 decays. The measurement assumes no direct CP violation in B0→D(*)h0 decays.
Published: 2018

39. Measurement of the decays Λc→Σππ at Belle

Author: Tagir Aushev, Y. Onuki, Iki Adachi, H. Miyata, M. Watanabe, Bo Wang, U. Tamponi, V. Gaur, S. Jia, Doo Young Kim, Y. Jin, O. Grzymkowska, C. H. Wang, K. Suzuki, S. Paul, V. M. Aulchenko, L. Li Gioi, J. Libby, D. M. Asner, M. Lubej, K. Hayasaka, A. Kuzmin, H. Ye, M. Nayak, G. Varner, Victoria Zhukova, F. Tenchini, A. B. Kaliyar, M. Niiyama, A. Chen, R. Mussa, A. Garmash, Elisa Guido, Shih-Chang Lee, S. Nishida, Takuro Sanuki, G. Schnell, B. G. Cheon, T. Uglov, D. Kotchetkov, V.N. Zhilich, R. Kulasiri, Z. Natkaniec, V.E. Shebalin, S. Al Said, M. T. Hedges, B. Shwartz, Pavel Krokovny, M. Salehi, T. Iijima, A. Ishikawa, J. Haba, Y. Seino, P. Križan, V. Bansal, Peter Kodys, W. W. Jacobs, Tao Luo, T. Nakano, K. K. Joo, S. Korpar, T. Kuhr, K. Senyo, A. Zupanc, T. Julius, G. Russo, H. Park, A. Bozek, S. Uno, C. Schwanda, K. Chilikin, H. Hayashii, Hyunyong Kim, S. Zakharov, T. Kawasaki, M. Sumihama, Motoki Iwasaki, D. Cinabro, I. Jaegle, Y. Watanabe, H. Kichimi, K. Miyabayashi, I. Badhrees, S. Di Carlo, M. Uchida, Andrey Sokolov, M. Merola, H. Atmacan, T.-A. Shibata, Y. Yusa, G. Karyan, L. K. Li, P. K. Behera, Massimo Berger, M. Takizawa, C. Z. Yuan, H. Ono, R. Mizuk, D. Liventsev, C. P. Shen, Noritaka Shimizu, Phillip Urquijo, M. Starič, Y. B. Li, T. Nanut, V. V. Zhulanov, Seok Kim, A. K. Giri, Y. Choi, K. J. Nath, R. Kroeger, M. E. Sevior, I. S. Lee, E. Won, R. Pestotnik, K. Inami, T. Hara, L. Santelj, A. Rostomyan, Semen Eidelman, X. L. Wang, Y. Sakai, R. Itoh, W. S. Hou, T. Sumiyoshi, Martin Ritter, V. Babu, M. Z. Wang, K. Kinoshita, J. B. Kim, M. Masuda, C. Kiesling, P. Wang, T. Czank, N. Dash, E. Solovieva, G. B. Mohanty, Y. Unno, B. K. Pal, V. Vorobyev, T. Ferber, I. Pavelkin, R. Ayad, K. Cho, C. B. Van Hulse, G. Pakhlova, R. B. Garg, M. Bračko, B. Bhuyan, Leo Piilonen, T. E. Browder, J. K. Ahn, A. J. Schwartz, P. Pakhlov, A. Vossen, A. M. Bakich, V. Savinov, N. K. Nisar, H. K. Moon, O. Seon, Frank Simon, J. S. Lange, Vladimir Popov, N. Gabyshev, D. Červenkov, Eberhard Widmann, J. F. Strube, Dipanwita Dutta, D. Matvienko, Z. P. Zhang, Jyoti Prakash Biswal, M. Nakao, P. Goldenzweig, S. Sandilya, H. Aihara, T. K. Pedlar, Y. Iwasaki, Y. J. Kwon, O. Schneider, B. G. Fulsom, Kevin Varvell, T. Mori, Y. Usov, T. Matsuda, G. Bonvicini, A. Vinokurova, J. G. Shiu, K. H. Kang, D. Epifanov, V. Bhardwaj, M. Gelb, G. Inguglia, S. Okuno, K. T. Kim, Y. Guan, Kiyoshi Tanida, John Yelton, Z. Doležal, and J. E. Fast
Subjects: Physics, KEKB, 010308 nuclear & particles physics, Full data, Electron–positron annihilation, 0103 physical sciences, Pi, Analytical chemistry, 010306 general physics, Lambda, 01 natural sciences
Abstract: We report measurements of the branching fractions of the decays Lambda(+)(c) -> Sigma(+)pi(-)pi(+), Lambda(+)(c) -> Sigma(0)pi(+)pi(0) and Lambda(+)(c) -> Sigma(+)pi(0)pi(0) relative to the reference channel Lambda(+)(c) -> pK(-)p(+). The analysis is based on the full data sample collected at and near the gamma(4S) resonance by the Belle detector at the KEKB asymmetric-energy ethorne-collider, corresponding to an integrated luminosity of 711 fb(-1). We measure B(Lambda(+)(c) -> Sigma(+)pi(-)pi(+))/B(Lambda(+)(c) -> pK(-)pi(+)) = 0.719 +/- 0.003 +/- 0.024, B(Lambda(+)(c) -> Sigma(0) pi(+)pi(0))/B(Lambda(+)(c) -> pK(-)pi(+)) = 0.575 +/- 0.005 +/- 0.036 and B(Lambda(+)(c) -> Sigma(+)pi(0)pi(0))/B(Lambda(+)(c) -> pK(-)pi(+)) = 0.247 +/- 0.006 +/- 0.019. The listed uncertainties are statistical and systematic, respectively.
Published: 2018

40. Observation of ϒ(2S)→γηb(1S) Decay

Author: L. E. Piilonen, D. Epifanov, B. Pal, T. V. Dong, Y. Choi, K. J. Nath, K. Kinoshita, E. Prencipe, G. Schnell, A. Garmash, T. Iijima, V.N. Zhilich, T. K. Pedlar, Y. Sakai, R. Mussa, C. P. Shen, K. Miyabayashi, I. Badhrees, H. B. Jeon, A. Ishikawa, S. Eidelman, T. Kuhr, T. Julius, M. Nakao, N. K. Nisar, V. Babu, P. Križan, T. Aushev, Soumen Paul, J. H. Yin, S. E. Vahsen, Z. P. Zhang, T. Ferber, H. Park, T. Matsuda, A. Bozek, S. Uno, G. Pakhlova, J. G. Shiu, G. Bonvicini, K. K. Joo, H. K. Moon, S. Cunliffe, R. Kulasiri, J. S. Lange, R. Pestotnik, A. Vinokurova, A. Vossen, X. L. Wang, V. Chekelian, H. Hayashii, G. B. Mohanty, Phillip Urquijo, M. Sumihama, Z. Drásal, R. Van Tonder, S. H. Kim, Eleonora Guido, Frank Simon, P. Krokovny, D. Joffe, Vladimir Popov, B. Bhuyan, Andrey Sokolov, Y. B. Li, K. Cho, V. Zhukova, M. Salehi, P. L. Wang, T. Mori, H. Aihara, Luka Santelj, V. Savinov, S. Hirose, James E. Fast, A. Zupanc, W. Sutcliffe, Jyoti Prakash Biswal, G.V. Russo, V. M. Aulchenko, M. Iwasaki, J. F. Strube, W. S. Hou, B. G. Cheon, L. Li Gioi, Shih-Chang Lee, K. Inami, E. Solovieva, H. J. Kim, Massimo Berger, V. Vorobyev, N. Dash, B. Shwartz, R. Itoh, A. Bondar, F. Tenchini, C. Z. Yuan, S. Korpar, D. Kotchetkov, T. Sumiyoshi, E. Won, Martin Ritter, T. Sanuki, A. Chen, V.E. Shebalin, H. Kichimi, S. Al Said, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, M. Niiyama, C. Schwanda, V. Gaur, R. Mizuk, K. Chilikin, C. Beleño, K. T. Kim, Yoshinobu Unno, S. K. Choi, A. K. Giri, K. Sumisawa, H. Atmacan, M. Takizawa, Z. Doležal, M. Masuda, L. Cao, Peter Kodys, W. W. Jacobs, S. Di Carlo, A. Kuzmin, S. Ogawa, U. Tamponi, S. Jia, C. H. Wang, Tara Nanut, T. Bilka, T. Uglov, M. Watanabe, T. E. Browder, H. Ye, M. Nayak, P. Pakhlov, S. Nishida, Jochen Dingfelder, Z. Natkaniec, R. Ayad, D. Y. Kim, M. Merola, H. Ono, K. Senyo, Vikas Bansal, I. Adachi, J. B. Kim, C. Van Hulse, Jasvinder A. Singh, S. Sandilya, M. Starič, M. Gelb, Tao Luo, K. Tanida, Y. Iwasaki, Y. J. Kwon, O. Schneider, J. Libby, D. M. Asner, K. Hayasaka, Linhu Li, Y. Seino, Bingran Wang, Shoichi Watanuki, D. Cinabro, A. Rabusov, M. Lubej, G. Inguglia, Somnath Choudhury, S. Pardi, S. Okuno, D. Liventsev, Vladimir Zhulanov, Y. Jin, R. Kroeger, M. E. Sevior, I. S. Lee, P. Goldenzweig, J. Haba, T. Kawasaki, M. Uchida, V. Bhardwaj, G. S. Varner, A. Rostomyan, B. G. Fulsom, C. Kiesling, M. Bračko, Rocky Bala Garg, Eberhard Widmann, D. Matvienko, A. M. Bakich, N. Gabyshev, and D. Červenkov
Subjects: Physics, Photon, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, 01 natural sciences, Measure (mathematics), law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, 010306 general physics, Collider
Abstract: We report the observation of ϒ(2S)→γηb(1S) decay based on an analysis of the inclusive photon spectrum of 24.7 fb-1 of e+e- collisions at the ϒ(2S) center-of-mass energy collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure a branching fraction of B[ϒ(2S)→γηb(1S)]=(6.1-0.7-0.6+0.6+0.9)×10-4 and derive an ηb(1S) mass of 9394.8-3.1-2.7+2.7+4.5 MeV/c2, where the uncertainties are statistical and systematic, respectively. The significance of our measurement is greater than 7 standard deviations, constituting the first observation of this decay mode.
Published: 2018

41. Observation of e+e−→γχc1 and search for e+e−→γχc0 , γχc2 , and γηc at s near 10.6 GeV at Belle

Author: B. G. Cheon, Y. Iwasaki, Y. J. Kwon, J. Libby, R. B. Garg, B. Bhuyan, D. Epifanov, Jihwa Lee, D. Kotchetkov, M. Merola, B. G. Fulsom, O. Schneider, Kevin Varvell, J. Haba, T. E. Browder, J. Kahn, C. P. Shen, E. Nakano, T. K. Pedlar, A. K. Giri, Seok Kim, G.V. Russo, S. Korpar, Y. Seino, S. L. Olsen, C. H. Li, Y. Tao, M. Masuda, G. Schnell, T. Iijima, T. Mori, H. Aihara, V. Savinov, N. Dash, Y. Usov, V.N. Zhilich, W. S. Hou, Rahul Kumar, Andrey Sokolov, V. Babu, L. Li Gioi, L. Cao, Shoichi Watanuki, Y. Sakai, P. Goldenzweig, Alexei Kuzmin, T. Matsuda, T. Aushev, D. M. Asner, J. G. Shiu, N. Gabyshev, D. Červenkov, R. Mizuk, S. Sandilya, S. Eidelman, K. Senyo, S. Pardi, H. Ono, H. Hayashii, Hyunyong Kim, T. Kawasaki, V. V. Zhulanov, V. Vorobyev, T. Ferber, H. Ye, C. Beleño, F. Tenchini, T. Kuhr, M. Uchida, L. K. Li, Z. P. Zhang, Phillip Urquijo, Y. B. Li, Y. Yusa, T. Sumiyoshi, E. Solovieva, M. Starič, P. Krokovny, K. Cho, J. B. Kim, M. Z. Wang, K. Kinoshita, C. Kiesling, R. Mussa, J. H. Yin, D. Liventsev, G. S. Varner, Y. Unno, P. C. Lu, Martin Ritter, M. Nayak, C.-L. Hsu, J. E. Fast, A. Frey, I. Adachi, A. Ishikawa, Ya-Qiu Jin, D. Joffe, R. Itoh, S. K. Choi, H. Miyata, R. Kroeger, M. E. Sevior, I. S. Lee, M. Bračko, A. Rostomyan, M. Salehi, Seongbae Yang, Peter Kodys, W. W. Jacobs, T. Sanuki, S. Ogawa, P. Wang, P. Križan, S. Al Said, T.-A. Shibata, Frank Simon, Vladimir Popov, T. Bilka, N. K. Nisar, Jyoti Prakash Biswal, Bo Wang, S. Di Carlo, Eberhard Widmann, T. V. Dong, E. Waheed, J. F. Strube, Y. Choi, K. J. Nath, J. S. Lange, K. Tanida, R. Ayad, G. Karyan, K. Hayasaka, A. Bobrov, S. Cunliffe, L. Santelj, D. Y. Kim, W. Ostrowicz, V. Gaur, S. Uehara, A. B. Kaliyar, M. Takizawa, K. Inami, M. Nakao, Z. Doležal, S. Jia, J. MacNaughton, T. Uglov, J. Schueler, K. Lalwani, E. Won, L. E. Piilonen, C. H. Wang, S. Uno, C. Schwanda, S. Paul, G. Pakhlova, M. Gelb, H. Kichimi, R. Kulasiri, Z. J. Liptak, H. Atmacan, A. Garmash, Daniel Greenwald, V. Bansal, P. K. Behera, D. Cinabro, M. Lubej, G. Inguglia, P. Chang, Somnath Choudhury, Shih-Chang Lee, Motoki Iwasaki, W. Sutcliffe, Y. Onuki, H. Yamamoto, V. M. Aulchenko, Massimo Berger, Victoria Zhukova, C. Z. Yuan, A. Chen, E. Prencipe, K. Chilikin, R. Pestotnik, A. Bozek, S. Nishida, X. L. Wang, V. Chekelian, D. Matvienko, R. Van Tonder, B. K. Pal, and Z. S. Stottler
Subjects: Physics, Particle physics, KEKB, 010308 nuclear & particles physics, law, Electron–positron annihilation, 0103 physical sciences, Born approximation, 010306 general physics, Collider, 01 natural sciences, law.invention
Abstract: Using data samples of 89.5 fb(-1), 711.0 fb(-1), and 121.4 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider at center-of-mass energies 10.52, 10.58, and 10.867 GeV, respectively, we study the exclusive reactions e(+)e(-) -> gamma chi(cJ) (J = 0, 1, 2) and e(+)e(-) -> gamma chi(c). A significant gamma chi(c1) signal is observed for the first time at root s = 10.58 GeV with a significance of 5.1 sigma including systematic uncertainties. No significant excesses for gamma chi(c0), gamma chi(c2), and gamma chi(c) final states are found, and we set 90% credibility level upper limits on the Born cross sections (sigma(B)) at 10.52 GeV, 10.58 GeV, and 10.867 GeV. Together with cross sections measured by BESIII at lower center-of-mass energies, the energy dependency of sigma(B) (e(+)e(-) -> gamma chi(c1)) thorn is obtained.
Published: 2018

42. Measurement of ηc(1S) , ηc(2S) , and nonresonant η′π+π− production via two-photon collisions

Author: H. Ye, J. E. Fast, C. C. Zhang, M. Watanabe, U. Tamponi, C. H. Wang, S. Paul, Elisa Guido, G. Schnell, V. Babu, T. Aushev, Y. Iwasaki, Y. J. Kwon, O. Schneider, H. Ono, M. Nayak, T. Ferber, Ya-Qiu Jin, A. Garmash, Z. Drásal, P. Goldenzweig, V. Bansal, S. Sandilya, M. Iwasaki, B. G. Cheon, S. Nishida, M. Starič, Y. Unno, P. K. Behera, D. Matvienko, A. Zupanc, R. Ayad, A. Rostomyan, J. Libby, M. Lubej, X. L. Wang, V.E. Shebalin, Tao Luo, C. Kiesling, J. Haba, S. Al Said, Z. Natkaniec, A. B. Kaliyar, K. Tanida, D. M. Asner, S. Uehara, K. Chilikin, S. Korpar, T. Nanut, Y. Seino, B. K. Pal, M. Masuda, M. Bračko, S. Eidelman, Meng Wang, Y. Watanabe, E. Won, P. Pakhlov, H. Kichimi, Shih-Chang Lee, C. P. Shen, S. Uno, C. Schwanda, I. Adachi, Y. Yusa, S. Okuno, M. Salehi, J. G. Shiu, R. Pestotnik, A. M. Bakich, H. Atmacan, C. B. Van Hulse, Phillip Urquijo, Massimo Berger, G. Russo, H. Park, A. Bozek, Victoria Zhukova, N. Gabyshev, D. Červenkov, Y. Choi, K. J. Nath, Y. B. Li, A. Chen, Y. Onuki, T.-A. Shibata, Rocky Bala Garg, C. Z. Yuan, Eberhard Widmann, Andrey Sokolov, J. F. Strube, T. Uglov, W. S. Hou, Peter Kodys, B. Bhuyan, J. B. Kim, V. M. Aulchenko, H. Miyata, B. G. Fulsom, D. Cinabro, T. Czank, E. L. Barberio, Bo Wang, K. Inami, M. T. Hedges, S. Di Carlo, V. Vorobyev, G. Inguglia, V. V. Zhulanov, K. Hayasaka, K. Senyo, T. Kawasaki, G. Karyan, M. Uchida, L. K. Li, R. Mizuk, Noritaka Shimizu, Q. N. Xu, D. Liventsev, K. K. Joo, V. Savinov, D. Y. Kim, M. Merola, N. K. Nisar, H. K. Moon, G. S. Varner, H. Hayashii, Hyunyong Kim, S. Zakharov, F. Tenchini, R. Kroeger, M. E. Sevior, I. S. Lee, R. Mussa, R. Itoh, H. B. Jeon, V.N. Zhilich, A. Ishikawa, P. Križan, P. Wang, T. Sumiyoshi, Martin Ritter, I. Jaegle, K. Miyabayashi, I. Badhrees, T. Sanuki, S. Cunliffe, Y. Guan, A. Vossen, L. E. Piilonen, G. Pakhlova, R. Kulasiri, O. Seon, Vladimir Popov, Y. Sakai, Jyoti Prakash Biswal, V. Gaur, N. Dash, E. Solovieva, D. Kotchetkov, T. Mori, H. Aihara, Z. P. Zhang, A.E. Bondar, M. Takizawa, Z. Doležal, S. K. Choi, T. Julius, M. Gelb, D. Epifanov, V. Bhardwaj, T. K. Pedlar, T. Matsuda, A. Vinokurova, P. Krokovny, K. H. Kang, K. Cho, and L. Li Gioi
Subjects: Systematic error, Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Quarkonium, 01 natural sciences, KEKB, 0103 physical sciences, Pi, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, 010306 general physics
Abstract: We report the measurement of $\gamma \gamma \to \eta_{c}(1S), \eta_{c}(2S) \to \eta' \pi^+ \pi^-$ with $\eta'$ decays to $\gamma \rho$ and $\eta \pi^+ pi^-$ using 941 fb$^{-1}$ of data collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The $\eta_{c}(1S)$ mass and width are measured to be $M = [2984.6\pm0.7 (stat.)\pm2.2 (syst.)] MeV/c^{2}$ and $\Gamma = [30.8^{+2.3}_{-2.2}~(stat.) \pm 2.5~(syst.)]$ MeV, respectively. First observation of $\eta_{c}(2S) \to \eta' pi^+ pi^-$ with a significance of 5.5$\sigma$ including systematic error is obtained, and the $\eta_{c}(2S)$ mass is measured to be $M = [3635.1\pm3.7~(stat.)\pm2.9~(syst.)] MeV/c^{2}$. The products of the two-photon decay width and branching fraction (B) of decays to $\eta' pi^+ pi^-$ are determined to be $\Gamma_{\gamma \gamma}B = [65.4\pm2.6~(stat.)\pm6.9~(syst.)]$ eV for $\eta_{c}(1S)$ and $[5.6^{+1.2}_{-1.1}~(stat.)\pm1.1~(syst.)]$ eV for $\eta_{c}(2S)$. A new decay mode for the $\eta_{c}(1S) \to \eta' f_{0}(2080)$ with $f_{0}(2080) \to \pi^+ pi^-$ is observed with a statistical significance of 20$\sigma$. The $f_{0}(2080)$ mass and width are determined to be $M = [2083^{+63}_{-66}~(stat.)\pm 32~(syst.)] MeV/c^{2}$ and $\Gamma = [178^{+60}_{-178}~(stat.) \pm 55~(syst.)]$ MeV. The cross sections for $\gamma \gamma \to \eta' pi^+ pi^-$ and $\eta' f_{2}(1270)$ are measured for the first time.
Published: 2018

43. Observation of ϒ(4S)→η′ϒ(1S)

Author: V. Babu, T. Aushev, G. Schnell, A. Kuzmin, T. Ferber, S. Ogawa, L. E. Piilonen, M. Salehi, Y. Sakai, G. B. Mohanty, M. Starič, Vikas Bansal, T. Julius, F. Tenchini, T. Sumiyoshi, Rocky Bala Garg, Eberhard Widmann, T. Kumita, Y. Yusa, H. K. Moon, E. Nakano, R. Mussa, H. B. Jeon, C. P. Shen, T. Sanuki, M. Niiyama, C. Van Hulse, A. Bozek, A. Ishikawa, J. G. Shiu, M. Nayak, K. T. Kim, Y. Iwasaki, Y. J. Kwon, M. Nakao, Soumen Paul, A. Chen, J. Libby, S. Nishida, C. W. Park, J. Haba, S. K. Choi, M. T. Hedges, D. Matvienko, O. Schneider, P. Križan, E. Won, L. Li Gioi, K. Chilikin, V.N. Zhilich, Y. B. Li, A. Garmash, X. L. Wang, V. Chekelian, A. M. Bakich, K. Inami, H. Atmacan, Eleonora Guido, Y. Seino, D. M. Asner, Tao Luo, K. Tanida, S. Zakharov, M. Z. Wang, K. Kinoshita, U. Tamponi, K. Miyabayashi, I. Badhrees, Andrey Sokolov, J. MacNaughton, M. Merola, R. Pestotnik, B. Pal, M. Iwasaki, Vladimir Popov, Massimo Berger, M. Watanabe, G.V. Russo, Tara Nanut, T. E. Browder, B. G. Cheon, T. A. Shibata, H. Miyata, Y. Choi, K. J. Nath, D. Cinabro, T. Uglov, N. Gabyshev, D. Červenkov, C. Z. Yuan, Prafulla Kumar Behera, W. Ostrowicz, W. S. Hou, S.I. Eidelman, M. Lubej, G. Inguglia, P. L. Wang, S. Jia, Bingran Wang, James E. Fast, M. Gelb, B.A. Shwartz, H. Hayashii, S. Korpar, D. Kotchetkov, T. Hara, T. Kawasaki, Somnath Choudhury, C. H. Wang, M. Uchida, S. Pardi, L. K. Li, H. Ye, V. Bhardwaj, D. Liventsev, Vladimir Zhulanov, Y. Jin, G. S. Varner, A.E. Bondar, C. Kiesling, R. Itoh, A. Rostomyan, S. Cunliffe, B. G. Fulsom, R. Kroeger, I. S. Lee, P. Goldenzweig, M. Takizawa, John Yelton, M. Bračko, Z. Doležal, R. Mizuk, Z. P. Zhang, G. Pakhlova, Peter Kodys, W. W. Jacobs, T. Mori, H. Aihara, Y. Usov, S. Di Carlo, Jyoti Prakash Biswal, G. Karyan, A. K. Giri, J. F. Strube, M. Masuda, R. Kulasiri, M. Sumihama, V. Zhukova, V.M. Aulchenko, Shih-Chang Lee, Y. Watanabe, V. Gaur, V.E. Shebalin, S. Al Said, C. Schwanda, H. Ono, D. Epifanov, T. K. Pedlar, Y. Unno, R. Ayad, D. Y. Kim, J. B. Kim, T. Matsuda, G. Bonvicini, A. Vinokurova, S. H. Kim, P. Krokovny, Rakesh Kumar, K. H. Kang, and K. Cho
Subjects: 010308 nuclear & particles physics, Research council, 0103 physical sciences, General Physics and Astronomy, Library science, Christian ministry, 010306 general physics, National laboratory, 01 natural sciences
Abstract: We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and Pacific Northwest National Laboratory (PNNL)/Environmental Molecular Sciences Laboratory (EMSL) for valuable computing and Science Information NETwork 5 (SINET5) network support. We acknowledge support from Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan Society for the Promotion of Science (JSPS), and Nagoya's TLPRC (Japan); Australian Research Council (ARC) (Australia); FWF (Austria); National Natural Science Foundation of China (NSFC) and CAS Center for Excellence in Particle Physics (CCEPP) (China); MSMT (Czechia); CZF, Deutsche Forschungsgemeinschaft (DFG), EXC153, and VS (Germany); DST (India); Instituto Nazionale di Fisica Nucleare (INFN) (Italy); Ministry of Education (MOE), Ministry of Science, ICT and Future Planning (MSIP), National Research Foundation (NRF), RSRI, FLRFAS project, and GSDC of Korea Institute of Science and Technology Information (KISTI) (Korea); Ministerstwo Nauki i Szkolnictwa Wyzszego (MNiSW) and Narodowe Centrum Nauki (NCN) (Poland); MES under Contract No. 14.W03.31.0026 (Russia); ARRS (Slovenia); IKERBASQUE and Ministry of Economy and Competitiveness (MINECO) (Spain); SNSF (Switzerland); Ministry of Education (MOE) and Ministry of Science and Technology, Taiwan (MOST) (Taiwan); and U.S. Department of Energy (DOE) and National Science Foundation (NSF) (USA).
Published: 2018

44. Observation of an Excited Ω− Baryon

Author: M. Iwasaki, U. Tamponi, R. Ayad, B. G. Cheon, Seema Bahinipati, M. Uchida, G.V. Russo, M. Niiyama, W. S. Hou, V. Vorobyev, E. Won, A. Kuzmin, S. Jia, V. Bhardwaj, L. E. Piilonen, Vikas Bansal, D. Y. Kim, E. Nakano, P. L. Wang, G. S. Varner, T. V. Dong, Y. Choi, S. Eidelman, R. Itoh, K. J. Nath, A. B. Kaliyar, T. Matsuda, H. K. Moon, J. S. Lange, S. Pardi, S. Uno, Elisa Guido, Yu. V. Usov, A. Bondar, C. H. Wang, Y. Sakai, B. G. Fulsom, Jyoti Prakash Biswal, G. Bonvicini, R. Mizuk, G. Schnell, C. Van Hulse, S. Al Said, S. Korpar, D. Kotchetkov, I. Adachi, S. Zakharov, Soumen Paul, K. Chilikin, H. Park, A. Bozek, S. E. Vahsen, J. B. Kim, J. Haba, S. H. Kim, P. Krokovny, H. Ye, T. Julius, J. G. Shiu, H. Atmacan, B. Bhuyan, Tara Nanut, D. Cinabro, Rakesh Kumar, T. Kuhr, C. Beleño, J. F. Strube, K. K. Joo, T. A. Shibata, H. Miyata, Phillip Urquijo, G. Inguglia, K. H. Kang, K. Cho, M. Takizawa, T. Uglov, G. B. Mohanty, Y. B. Li, F. Tenchini, V. Savinov, Y. Yusa, J. T. McNeil, D. Epifanov, D. Liventsev, A. Vossen, B. Pal, R. Mussa, H. Ono, T. Sumiyoshi, John Yelton, H. B. Jeon, Vladimir Zhulanov, Y. Jin, Z. Doležal, R. Kroeger, M. E. Sevior, I. S. Lee, A. Ishikawa, S. Hirose, Somnath Choudhury, C. Schwanda, Martin Ritter, M. Nakao, Massimo Berger, T. K. Pedlar, Peter Kodys, P. Goldenzweig, J. Libby, K. T. Kim, Frank Simon, W. W. Jacobs, D. M. Asner, M. Lubej, K. Hayasaka, Vladimir Popov, T. Sanuki, P. Križan, Tao Luo, K. Tanida, T. Bilka, S. K. Choi, X. L. Wang, V. Gaur, C. Z. Yuan, K. Suzuki, A. M. Bakich, N. Dash, S. Di Carlo, Linhu Li, Andrey Sokolov, M. Merola, G. Karyan, Y. Seino, V. Chekelian, M. Watanabe, T. E. Browder, S. Cunliffe, Y. Tao, T. Mori, H. Aihara, D. Greenwald, Shoichi Watanuki, A. K. Giri, P. Pakhlov, James E. Fast, N. Gabyshev, D. Červenkov, N. K. Nisar, K. Senyo, Bingran Wang, M. Masuda, Rocky Bala Garg, S. Nishida, Eberhard Widmann, D. Matvienko, Z. P. Zhang, Z. Natkaniec, V.E. Shebalin, L. Li Gioi, G. Pakhlova, E. Solovieva, C. Kiesling, M. Bračko, A. Garmash, C. P. Shen, V. Babu, T. Aushev, V.N. Zhilich, Y. Kato, K. Miyabayashi, I. Badhrees, J. K. Ahn, Shih-Chang Lee, B. Shwartz, V. Zhukova, Dipak Kumar Sahoo, Luka Santelj, M. Sumihama, K. Inami, S. Sandilya, Z. Drásal, M. Starič, M. Gelb, H. Hayashii, M. Z. Wang, K. Kinoshita, T. Czank, Y. Iwasaki, Y. J. Kwon, O. Schneider, A. Chen, and R. Pestotnik
Subjects: Baryon, Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, Excited state, 0103 physical sciences, Quark model, Hyperon, General Physics and Astronomy, 010306 general physics, Omega baryon, 01 natural sciences
Abstract: Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω*- candidate decaying into Ξ0K- and Ξ-KS0 with a mass of 2012.4±0.7(stat)±0.6(syst) MeV/c2 and a width of Γ=6.4-2.0+2.5(stat)±1.6(syst) MeV. The Ω*- is seen primarily in ϒ(1S),ϒ(2S), and ϒ(3S) decays.
Published: 2018

45. Search for B−→μ−ν¯μ Decays at the Belle Experiment

Author: V. Zhukova, G. Inguglia, K. Sumisawa, P. Chang, S. Nishida, E. L. Barberio, D. Liventsev, Elisa Guido, Vikas Bansal, E. Nakano, V.E. Shebalin, Vladimir Zhulanov, Y. Jin, G. Schnell, T. Iijima, C. Van Hulse, Frank Simon, Y. Choi, K. J. Nath, S. Sandilya, Liangbin Li, J. Libby, M. E. Sevior, I. S. Lee, P. Goldenzweig, M. Starič, M. Lubej, K. Hayasaka, C. H. Li, U. Tamponi, T. Kuhr, Kevin Varvell, C. L. Hsu, M. Uchida, A. M. Bakich, Dipanwita Dutta, A. Rostomyan, A. B. Kaliyar, S. Al Said, Y. Iwasaki, Y. J. Kwon, R. Ayad, Y. Seino, O. Schneider, Andrey Sokolov, H. K. Moon, Seema Bahinipati, J. S. Lange, M. T. Hedges, Shoichi Watanuki, Z. Drásal, V. Chekelian, T. Mori, H. Aihara, D. Greenwald, A. Kuzmin, M. Nayak, Soumen Paul, S. Okuno, G. S. Varner, Yongsun Kim, A. Zupanc, C. H. Wang, S. Uno, C. Schwanda, T. Luo, S. Ogawa, James E. Fast, I. Jaegle, N. K. Nisar, J. Haba, N. Gabyshev, D. Červenkov, D. Y. Kim, Peter Kodys, R. Itoh, W. W. Jacobs, M. Merola, V. Gaur, A.L. Sibidanov, W. S. Hou, P. Pakhlov, S. Eidelman, Z. P. Zhang, B. Pal, Tara Nanut, K. K. Joo, Y. Guan, T. Uglov, B. G. Fulsom, Eberhard Widmann, K. Tanida, K. Senyo, J. Stypula, V. Vorobyev, Sadaharu Uehara, D. M. Asner, S. Di Carlo, E. Solovieva, G. Pakhlova, M. Watanabe, T. E. Browder, R. Mussa, C. Z. Yuan, Z. Natkaniec, M. Salehi, H. B. Jeon, G. B. Mohanty, A. Ishikawa, N. Dash, Y. Yamashita, Iki Adachi, G. Karyan, M. Nakao, H. Park, C. W. Park, A. Bozek, P. Križan, H. Ye, Jyoti Prakash Biswal, L. E. Piilonen, M. Rozanska, P. L. Wang, Y. Yusa, V.N. Zhilich, Meng Wang, E. Won, K. Chilikin, B. Bhuyan, J. B. Kim, Yuki Sato, T. Julius, K. Miyabayashi, I. Badhrees, R. Pestotnik, R. Kulasiri, C. Kiesling, V. Savinov, M. Sumihama, F. Tenchini, Yoshinobu Unno, T. Sumiyoshi, M. Takizawa, H. Ono, M. Bračko, L. Li Gioi, R. Mizuk, Martin Ritter, John Yelton, M. Masuda, A. Garmash, C. S. Park, S. Hirose, A. Chen, Z. Doležal, S. K. Choi, K. Trabelsi, J. Kahn, C. P. Shen, V. Babu, T. Aushev, T. Ferber, M. Niiyama, T. Matsuda, K. Inami, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, J. F. Strube, Y. Sakai, H. Hayashii, M. Iwasaki, B. G. Cheon, S. H. Kim, P. Krokovny, K. Kinoshita, T. Czank, Rakesh Kumar, K. H. Kang, K. Cho, S. Korpar, D. Epifanov, D. Kotchetkov, J. G. Shiu, T. Kawasaki, T. K. Pedlar, Phillip Urquijo, and D. Cinabro
Subjects: Physics, Particle physics, Muon, Missing energy, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, General Physics and Astronomy, 01 natural sciences, Belle experiment, KEKB, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Bar (unit)
Abstract: We report the results of a search for the rare, purely leptonic decay B- -> mu(-)(nu) over bar (mu) performed with a 711 fb(-1) data sample that contains 772 x 10(6) B (B) over bar pairs, collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The signal events are selected based on the presence of a high momentum muon and the topology of the rest of the event showing properties of a generic B-meson decay, as well as the missing energy and momentum being consistent with the hypothesis of a neutrino from the signal decay. We find a 2.4 standard deviation excess above background including systematic uncertainties, which corresponds to a branching fraction of B(B- -> mu(-)(nu) over bar (mu)) = (6.46 +/- 2.22 +/- 1.60) x 10(-7) or a frequentist 90% confidence level interval on the B- -> mu(-)(nu) over bar (mu) branching fraction of [2.9, 10.7] x 10(-7).
Published: 2018

46. Search for ϒ(1S,2S)→Zc+Zc(′)− and e+e−→Zc+Zc(′)− at s=10.52 , 10.58, and 10.867 GeV

Author: Pavel Krokovny, Shih-Chang Lee, Suyong Choi, A. K. Giri, U. Tamponi, M. Starič, M. Sumihama, Motoki Iwasaki, B. Shwartz, S. Uno, K. Trabelsi, E. Nakano, Y. J. Kwon, J. Libby, D. M. Asner, C. Schwanda, D. Cinabro, C. P. Shen, M. Lubej, K. Hayasaka, R. Kroeger, M. E. Sevior, I. S. Lee, A. Garmash, S. Jia, Seok Kim, M. Masuda, Tagir Aushev, O. Schneider, G.V. Russo, A. Zupanc, V. M. Aulchenko, V. Bansal, K. Kinoshita, V. Babu, B. G. Fulsom, Meng Wang, Vladimir Popov, Y. Jin, R. Mussa, H. B. Jeon, J. B. Kim, S. Nishida, A. Ishikawa, M. Merola, S. Paul, T. Ferber, W. S. Hou, Y. Seino, B. G. Cheon, R. Kulasiri, Jyoti Prakash Biswal, Elisa Guido, G. Schnell, T. Iijima, J. E. Fast, Iki Adachi, P. Križan, V.E. Shebalin, M. Uchida, Z. Natkaniec, C. Z. Yuan, Doo Young Kim, K. Chilikin, Tara Nanut, S. Pardi, S. Okuno, Zhicai Zhang, T. Kuhr, V. Vorobyev, C. B. Van Hulse, L. K. Li, P. Goldenzweig, S. Sandilya, K. T. Kim, T.-A. Shibata, C. Beleño, Andrey Sokolov, G. Pakhlova, T. Uglov, J. Haba, D. Liventsev, T. Bilka, V. V. Zhulanov, M. Salehi, Tao Luo, V. Gaur, T. K. Pedlar, T. Kumita, T. Julius, M. Nakao, M. Watanabe, K. Inami, Semen Eidelman, M. T. Hedges, S. Korpar, Peter Kodys, W. W. Jacobs, J. MacNaughton, Chunjie Wang, S. Di Carlo, G. Karyan, Shigeki Hirose, T. Matsuda, L. Li Gioi, G. Inguglia, H. Aihara, T. Sumiyoshi, Young-Il Choi, Martin Ritter, R. Itoh, Phillip Urquijo, Kiyoshi Tanida, P. Wang, T. Sanuki, S. Ogawa, H. Miyata, Prafulla Kumar Behera, Y. B. Li, F. Tenchini, Somnath Choudhury, G. Varner, H. Hayashii, Hyunyong Kim, S. Zakharov, Z. Doležal, H. Ye, A. Vinokurova, J. G. Shiu, S. Cunliffe, P. Pakhlov, V.N. Zhilich, Y. Usov, M. Gelb, Bo Wang, H. Ono, I. Jaegle, K. Miyabayashi, I. Badhrees, K. Senyo, E. Won, T. Kawasaki, R. Mizuk, R. Pestotnik, H. K. Moon, J. S. Lange, M. Niiyama, Yang Li, M. Nayak, K. J. Nath, T. Hara, L. Santelj, Victoria Zhukova, R. Ayad, K. Cho, Y. Sakai, A. Chen, M. Takizawa, N. Dash, E. Solovieva, Leo Piilonen, A. Vossen, Frank Simon, D. Kotchetkov, Rocky Bala Garg, Eberhard Widmann, J. F. Strube, B. Bhuyan, V. Savinov, Samo Stanič, A. Rostomyan, X. L. Wang, V. Chekelian, B. K. Pal, C. Kiesling, M. Bračko, H. Park, A. Bozek, N. Gabyshev, D. Červenkov, and S. Al Said
Subjects: Physics, KEKB, Annihilation, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Analytical chemistry, High Energy Physics::Experiment, 010306 general physics, 01 natural sciences
Abstract: The first search for double charged charmoniumlike state production in gamma (IS) and gamma (2S) decays and in e(+) e(-) annihilation at root s = 10.52, 10.58, and 10.867 GcV is conducted using data collected with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant signals are observed in any of the studied modes, and the 90% credibility level upper limits on their product branching fractions in gamma(1S) and gamma(2S) decays [B(gamma(1S, 2S) -> Z(c)(+)Z(c)((')-)) x B(Z(c)(+) -> pi(+) + c (c) over bar ) (c (c) over bar = J / psi, chi(c1) (1P), psi(2S))] and the product of Born cross section and branching fraction for e(+)e(-) -> Z(c)(+)Z(c)((')-)) (sigma(e(+)e(-) -> Z(c)(+)Z(c)((')-)) x B(Z(c)(+) -> pi(+) + c (c) over bar )) at root s = 10.52, 10.58, and 10.867 GeV are determined. Here, Z(c) refers to the Z(c) (3900) and Z(c) (4200) observed in the pi J/psi final state, the Z(c1)(4050) and Z(c2)(4250) in the pi chi(c1)(1P) final state, and the Z(c)(4050) and Z(c)(4430) in the pi psi(2S) final state.
Published: 2018

47. Measurement of time-dependent CP asymmetries in B0→KS0ηγ decays

Author: U. Tamponi, S. Jia, Soumen Paul, H. Aihara, Tagir Aushev, Y. Jin, C. H. Wang, Elisa Guido, M. Iwasaki, R. Ayad, K. Cho, T. Hara, G. Schnell, T. Iijima, H. Ye, Y. Usov, Byung Gu Cheon, I. Jaegle, T. Matsuda, S. Uno, T. Bilka, V.M. Aulchenko, Jyoti Prakash Biswal, Leo Piilonen, M. Watanabe, T. Kuhr, R. Itoh, A. Vossen, A. B. Kaliyar, S. Pardi, Yang Li, H. K. Moon, J. G. Shiu, J. S. Lange, S. Korpar, Peter Kodys, W. W. Jacobs, Pavel Krokovny, Frank Simon, J. MacNaughton, V.E. Shebalin, Andrey Sokolov, H. J. Kim, S. H. Kim, Y. Choi, K. J. Nath, M. Uchida, L. Santelj, L. K. Li, T. Nanut, R. Kulasiri, A. J. Schwartz, Dipak Kumar Sahoo, B. Pal, K. Trabelsi, Z. P. Zhang, W. S. Hou, S. Okuno, S. Di Carlo, A. Rostomyan, C. P. Shen, M. Sumihama, V. Gaur, H. Ono, R. Mizuk, G. Karyan, C. Z. Yuan, Y. Sakai, V. Chekelian, V. Vorobyev, V. Babu, S. Sandilya, S. Cunliffe, Phillip Urquijo, K. Senyo, K. Chilikin, E. Solovieva, N. Dash, Vikas Bansal, T. Ferber, S. Ogawa, Z. Natkaniec, M. Gelb, T. K. Pedlar, T. Kumita, Y. B. Li, G. Varner, E. Widmann, James E. Fast, G. B. Mohanty, E. Nakano, F. Tenchini, V.N. Zhilich, C. Beleño, D. Kotchetkov, C. Van Hulse, Shih-Chang Lee, Iki Adachi, P. Pakhlov, M. T. Hedges, Doo Young Kim, Y. Yusa, S. Al Said, Hitoshi Yamamoto, G. Inguglia, P. Wang, V. Zhukova, J. Haba, N. Gabyshev, D. Červenkov, Semen Eidelman, M. Takizawa, M. Salehi, K. Inami, Y. Iwasaki, Y. J. Kwon, R. Mussa, H. B. Jeon, K. Miyabayashi, J. B. Kim, E. Won, N. Shimizu, S. Nishida, R. Pestotnik, T. Uglov, O. Schneider, H. Nakano, I. Badhrees, G. Russo, H. Park, A. Ishikawa, Tao Luo, B. G. Fulsom, A. Bozek, C. Schwanda, Y. Seino, M. Nakao, A. K. Giri, K. Sumisawa, P. Križan, D. Cinabro, M. Nayak, C. Kiesling, Somnath Choudhury, B. Bhuyan, M. Masuda, S. Hirose, T. Kawasaki, Bingran Wang, T. Sumiyoshi, V. Savinov, J. Libby, D. M. Asner, M. Lubej, K. Hayasaka, J. F. Strube, M. Bračko, Xuejun Wang, Martin Ritter, B.A. Shwartz, Rocky Bala Garg, T. Sanuki, H. Hayashii, M. Starič, D. Liventsev, M. Z. Wang, K. Kinoshita, Vladimir Zhulanov, R. Kroeger, M. E. Sevior, I. S. Lee, P. Goldenzweig, Vladimir Popov, T. Julius, Samo Stanič, Kiyoshi Tanida, Z. Doležal, K. T. Kim, S. K. Choi, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, A. Garmash, S. Zakharov, A. Zupanc, M. Merola, Y. Guan, M. Niiyama, G. Pakhlova, and L. Li Gioi
Subjects: Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, Detector, Resonance, 01 natural sciences, Symmetry (physics), law.invention, KEKB, law, 0103 physical sciences, CP violation, High Energy Physics::Experiment, Invariant mass, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, 010306 general physics, Collider, Astrophysics::Galaxy Astrophysics
Abstract: We report a measurement of time-dependent CP violation parameters in B0→KS0ηγ decays. The study is based on a data sample, containing 772×106BB¯ pairs, that was collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the CP violation parameters of S=-1.32±0.77(stat)±0.36(syst) and A=-0.48±0.41(stat)±0.07(syst) for the invariant mass of the KS0η system up to 2.1 GeV/c2.
Published: 2018

48. Publisher’s Note: Search for B→hνν¯ decays with semileptonic tagging at Belle [Phys. Rev. D 96 , 091101(R) (2017)]

Author: G. Pakhlova, R. Kulasiri, Hirokazu Miyake, T. Julius, R. Chistov, F. Tenchini, T. Sumiyoshi, C. Pulvermacher, Martin Ritter, T. Sanuki, Z. Natkaniec, Yukinori Sato, M. Nayak, J. G. Shiu, Ya-Qiu Jin, A. Garmash, V. Bansal, Phillip Urquijo, R. Mussa, H. B. Jeon, M. T. Hedges, Y. B. Li, A. Ishikawa, A. Zupanc, V.E. Shebalin, S. Al Said, P. K. Behera, C. Z. Yuan, P. Križan, Y. Onuki, C. B. Van Hulse, S. Uno, C. Schwanda, A. M. Bakich, B. G. Cheon, G. Schnell, T. Iijima, Alexei Kuzmin, E. L. Barberio, N. Gabyshev, D. Červenkov, H. Yamamoto, Chawon Park, T.-A. Shibata, J. F. Strube, T. Kuhr, P. Goldenzweig, V. Vorobyev, C.-L. Hsu, S. Korpar, S. Sandilya, V. V. Zhulanov, M. J. Kim, N. Dash, R. Ayad, Peter Kodys, W. W. Jacobs, P. Katrenko, Victoria Zhukova, K. Inami, Felix Metzner, V. Babu, Y. Yook, T. Aushev, S. Di Carlo, G. Karyan, M. Starič, A. Chen, B. Shwartz, C. Kiesling, T. Ferber, T. Kumita, K. Chilikin, M. Masuda, H. Ono, K. K. Joo, G. B. Mohanty, D. Y. Kim, H. Hayashii, S. Wehle, Hyunyong Kim, M. Uchida, M. Bračko, Y. Yusa, M. Z. Wang, K. Kinoshita, A. B. Kaliyar, L. K. Li, R. Mizuk, H. Farhat, S. Ogawa, Y. Iwasaki, Y. Ushiroda, D. Liventsev, J. B. Kim, Y. Unno, Tariq Aziz, Y. J. Kwon, C. W. Park, E. Won, Y. Sakai, Seema Bahinipati, O. Schneider, Y. Choi, I. Adachi, K. J. Nath, G. S. Varner, T. Hara, L. Santelj, L. Pesántez, K. Trabelsi, Z. Drásal, J. Kahn, C. P. Shen, E. Waheed, Seok Kim, R. Itoh, A. Rostomyan, J. Grygier, P. Wang, D. Matvienko, E. Nakano, B. Golob, N. K. Nisar, H. K. Moon, H. Miyata, J. S. Lange, Bo Wang, M. Ziegler, T. Schlüter, Dipanwita Dutta, D. M. Asner, K. Hayasaka, A. Bobrov, C. H. Li, E. Solovieva, K. Senyo, Ihn Sik Seong, M. Heck, T. Kawasaki, S. Eidelman, Tara Nanut, T. Uglov, H. Park, A. Bozek, D. Kotchetkov, S. Nishida, V. Chekelian, B. K. Pal, Eleonora Guido, B. Bhuyan, B. G. Fulsom, T. E. Browder, V. Savinov, D. Joffe, A. Vossen, Frank Simon, Z. P. Zhang, Jyoti Prakash Biswal, S. Okuno, D. Cinabro, M. E. Sevior, V. Gaur, M. Lubej, G. Inguglia, P. Chang, M. Nakao, J. Libby, Y. Seino, M. T. Prim, Tao Luo, T. Mori, H. Aihara, L. Li Gioi, Y. Yamashita, Y. Watanabe, H. Kichimi, H. Ye, T. Tsuboyama, T. K. Pedlar, V.N. Zhilich, T. Matsuda, U. Tamponi, G. Bonvicini, J. Haba, I. Jaegle, K. Miyabayashi, I. Badhrees, P. Krokovny, K. H. Kang, K. Cho, M. Gelb, A.E. Bondar, O. Grzymkowska, C. H. Wang, M. Takizawa, T. Keck, A. J. Schwartz, S. Paul, K. M. Williams, J. E. Fast, Z. Doležal, K. T. Kim, R. Gillard, M. Watanabe, and L. E. Piilonen
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences
Published: 2018

49. Search for light tetraquark states in ϒ(1S) and ϒ(2S) decays

Author: A. Vossen, O. Seon, S. Jia, Yang Li, A. M. Bakich, Z. Natkaniec, C. Kiesling, M. Bračko, O. Grzymkowska, C. H. Wang, Y. Choi, K. J. Nath, N. Gabyshev, D. Červenkov, X. L. Wang, Y. Yamashita, H. Ye, J. G. Shiu, L. Santelj, Vikas Bansal, V. Babu, Rocky Bala Garg, Eberhard Widmann, E. Solovieva, T. Aushev, N. Dash, Y. Sakai, J. Libby, D. Kotchetkov, K. Hayasaka, S. Nishida, Phillip Urquijo, Shih-Chang Lee, A. Zupanc, G. Pakhlova, C. Van Hulse, T. Matsuda, S. Uno, Y. Seino, M. Watanabe, M. Uchida, K. Chilikin, K. T. Kim, K. Tanida, S. Pardi, L. K. Li, Y. Watanabe, G. Bonvicini, S. Okuno, Y. Yusa, T. Ferber, D. Joffe, V. Chekelian, Dipanwita Dutta, B. Pal, V. Bhardwaj, J. B. Singh, S. K. Choi, K. Inami, Massimo Berger, M. Nayak, Soumen Paul, V.E. Shebalin, J. Stypula, G.V. Russo, Y. Iwasaki, M. Iwasaki, Y. J. Kwon, B. G. Cheon, D. Cinabro, G. Schnell, T. Iijima, M. Z. Wang, S. H. Kim, P. Krokovny, G. S. Varner, U. Tamponi, T. Czank, T. Luo, L. Li Gioi, C. Z. Yuan, M. Lubej, K. K. Joo, G. Inguglia, V. Zhukova, A. Chen, A. Garmash, M. Merola, Eleonora Guido, A. Kuzmin, R. Mussa, H. Kichimi, V. Gaur, K. Cho, K. Senyo, A. Rostomyan, O. Schneider, R. Itoh, B. Bhuyan, P. Wang, Bingran Wang, D. Epifanov, B. G. Fulsom, S. Korpar, T. E. Browder, R. Kulasiri, S. Ogawa, B.A. Shwartz, W. S. Hou, M. Gelb, V.N. Zhilich, M. T. Hedges, M. Sumihama, S. Al Said, Noritaka Shimizu, A. Ishikawa, H. Hayashii, S. Sandilya, V. Savinov, S. Zakharov, D. Liventsev, M. Takizawa, T. Kawasaki, Vladimir Zhulanov, Y. Jin, M. Nakao, R. Kroeger, M. E. Sevior, I. S. Lee, Y. Onuki, M. Starič, I. Jaegle, K. Miyabayashi, I. Badhrees, T. Kumita, P. Goldenzweig, Z. Doležal, C. Schwanda, C. W. Park, P. Križan, P. Pakhlov, R. Pestotnik, D. Matvienko, J. K. Ahn, C. P. Shen, J. Haba, D. M. Asner, H. Park, A. Bozek, Andrey Sokolov, Tara Nanut, T. Uglov, James E. Fast, A. B. Kaliyar, H. K. Moon, J. S. Lange, L. E. Piilonen, T. Julius, F. Tenchini, T. Sumiyoshi, E. Won, Martin Ritter, T. Sanuki, H. Atmacan, M. C. Chang, M. Salehi, A. K. Giri, M. Masuda, R. Ayad, Seema Bahinipati, D. Y. Kim, H. Ono, R. Mizuk, Peter Kodys, Y. Unno, W. W. Jacobs, I. Adachi, J. B. Kim, S. Di Carlo, G. Karyan, M. Niiyama, S. L. Olsen, T. A. Shibata, H. Miyata, Prafulla Kumar Behera, S.I. Eidelman, T. Hara, T. Mori, H. Aihara, Y. Usov, Jyoti Prakash Biswal, H. J. Kim, N. K. Nisar, I. Pavelkin, and Z. P. Zhang
Subjects: Physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Hadron, Analytical chemistry, Tetraquark, Atomic physics, 010306 general physics, 01 natural sciences, Omega
Abstract: We search for the J(PC) = 0(--) and 1(+-) light tetraquark states with masses up to 2.46 GeV/c(2) in gamma(1S) and gamma(2S) decays with data samples of (102 +/- 2) million and (158 +/- 4) million events, respectively, collected with the Belle detector. No significant signals are observed in any of the studied production modes, and 90% credibility level (C. L.) upper limits on their branching fractions in Upsilon(1S) and Upsilon(2S) decays are obtained. The inclusive branching fractions of the Upsilon(1S) and Upsilon(2S) decays into final states with f(1)(1285) are measured to be B(Upsilon(1S) -> f(1)(1285) + anything) = (46 +/- 28(stat) +/- 13(syst)) x 10(-4) and B(Upsilon(2S) -> f(1)(1285) + anything) = (22 +/- 15(stat) +/- 6.3(syst)) x 10(-4). The measured chi(b2) -> J/Psi + anything branching fraction is measured to be (1.50 +/- 0.34(stat) +/- 0.22(syst)) x 10(-3), and 90% C. L. upper limits for the chi(b0;b1) -> J/Psi + anything branching fractions are found to be 2.3 x 10(-3) and 1.1 x 10(-3), respectively. For B(chi(b1) -> omega + anything), the branching fraction is measured to be (4.9 +/- 1.3(stat) +/- 0.6(syst) x 10(-2). All results reported here are the first measurements for these modes.
Published: 2017

50. Measurement of the decays B→ηℓνℓ and B→η′ℓνℓ in fully reconstructed events at Belle

Author: L. Li Gioi, Y. Yamashita, K. Kinoshita, H. Ye, E. Nakano, B. G. Cheon, Meng Wang, S. Al Said, J. G. Shiu, Phillip Urquijo, U. Tamponi, Y. B. Li, C. B. Van Hulse, Y. Sakai, S. Okuno, S. Korpar, Victoria Zhukova, P. Goldenzweig, S. Sandilya, H. Hayashii, G. Schnell, A. Chen, M. Masuda, C. H. Wang, S. Ogawa, T. Iijima, F. Tenchini, T. K. Pedlar, M. J. Kim, T. Sumiyoshi, J. E. Fast, N. Dash, E. Solovieva, S. Uno, M. T. Hedges, Martin Ritter, Kevin Varvell, C. Schwanda, H. Miyata, M. Starič, D. Kotchetkov, T. Sanuki, Y. J. Kim, L. E. Piilonen, R. Kulasiri, T.-A. Shibata, J. C. Dingfelder, V. Babu, T. Aushev, A. M. Bakich, D. Cinabro, A. Zupanc, M. Salehi, A. Frey, T. Ferber, M. E. Sevior, I. S. Lee, D. Joffe, G. Inguglia, V.N. Zhilich, Peter Kodys, T. Mori, H. Aihara, Y. Usov, V.E. Shebalin, Jyoti Prakash Biswal, Tao Luo, K. Tanida, N. Gabyshev, D. Červenkov, R. Chistov, A. Bobrov, R. Ayad, O. Seon, Frank Simon, S. Di Carlo, K. Inami, G. Karyan, Y. Watanabe, D. M. Asner, R. Pestotnik, J. Libby, M. Lubej, T. Nanut, K. Miyabayashi, V. Gaur, I. Badhrees, H. Ono, Y. Iwasaki, C. Beleño, D. Matvienko, Y. Seino, M. Nakao, M. Nayak, T. Uglov, Y. Unno, O. Schneider, M. Takizawa, Ya-Qiu Jin, M. Bračko, Eberhard Widmann, H. Farhat, John Yelton, Z. Doležal, J. B. Kim, K. T. Kim, R. Gillard, S. K. Choi, Z. P. Zhang, H. B. Jeon, A. Ishikawa, P. Križan, K. K. Joo, Chawon Park, Y. Choi, V. V. Zhulanov, K. J. Nath, T. Hara, Y. Yook, S. Nishida, B. K. Pal, S. Eidelman, D. Y. Kim, H. Park, T. Matsuda, B. Bhuyan, B. G. Fulsom, T. E. Browder, A. Vinokurova, P. Krokovny, K. H. Kang, K. Cho, M. Uchida, D. Liventsev, G. S. Varner, R. Itoh, P. Wang, K. Senyo, W. S. Hou, V. Vorobyev, C. W. Park, E. Won, H. K. Moon, A. Garmash, V. Bansal, and P. K. Behera
Subjects: Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Eta meson, 01 natural sciences, Belle experiment, KEKB, 0103 physical sciences, High Energy Physics::Experiment, B meson, Nuclear Experiment, 010306 general physics, Lepton
Abstract: We report branching fraction measurements of the decays B+ -> eta l(+)v(l) and B+ -> eta'l(+)v(l) based on 711 fb(-1) of data collected near the (sic)(4S) resonance with the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider. This data sample contains 772 million B (B) over bar events. One of the two B mesons is fully reconstructed in a hadronic decay mode. Among the remaining ("signal-B") daughters, we search for the eta meson in two decay channels, eta -> gamma gamma and eta -> pi(+)pi(-)pi(0), and reconstruct the eta' meson in eta' -> eta pi(+)pi(-) with subsequent decay of the eta into gamma gamma Combining the two. modes and using an extended maximum likelihood, the B+ -> eta l(+)v(l) branching fraction is measured to be (4.2 +/- 1.1 (stat.) +/- 0.3 (syst.)) x 10(-5). For B+ -> eta l(+)v(l),we observe no significant signal and set an upper limit of 0.72 x 10(-4) at 90% confidence level.
Published: 2017

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