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1. Search for Bs0→η′Xss¯ at Belle using a semi-inclusive method

Author

D. M. Asner, K. Tanida, K. Hayasaka, Daniel Greenwald, S. Al Said, D. Epifanov, Soumya D. Mohanty, R. Mizuk, K. Chilikin, Y. Seino, S. E. Vahsen, J. V. Bennett, Y. Tao, F. Di Capua, M. Uchida, T. K. Pedlar, GB Mohanty, P. Wang, Shoichi Watanuki, Yongsun Kim, A. Sangal, P. Oskin, Y. Usov, L. K. Li, K. Lalwani, C. Schwanda, S. Nishida, Martin Florian Bessner, R. Kulasiri, J. Li, R. Dhamija, A. B. Kaliyar, W. B. Yan, H. Kichimi, A. Bobrov, Y. Iwasaki, L. Nayak, V. Babu, H Ye, T. J. Moon, M. T. Prim, K. Sumisawa, H. E. Cho, TE Browder, P Behera, A. K. Giri, T. Matsuda, M. T. Hedges, BG Cheon, G. Schnell, K. Nishimura, N. Rout, M. Bračko, T. Ferber, M. Masuda, S. Uno, K. Senyo, C. W. Joo, S Choudhury, G. Bonvicini, E. Prencipe, S. Das, G. Varner, R. Itoh, A. Bozek, A. Rostomyan, S. Pardi, G. Russo, S. Dubey, G. Pakhlova, S. Cunliffe, V.N. Zhilich, B. G. Fulsom, K. Gudkova, J. F. Strube, E.-J. Jang, M Merola, Y. Guan, C.-L. Hsu, Semen Eidelman, M. Nayak, J. Biswal, Y Choi, Rahul Kumar, K. Miyabayashi, Samo Korpar, S-H Park, C. Hadjivasiliou, C. Sharma, Bruce Yabsley, S. Sandilya, W. S. Hou, T. Kuhr, Pavel Krokovny, C. H. Li, A. Ishikawa, R. Van Tonder, M. Nakao, M. Takizawa, V. Gaur, R. B. Garg, B. Bhuyan, Y. Ushiroda, A. Natochii, J-G Shiu, C. MacQueen, P. Križan, M. Starič, K. Inami, Z. Doležal, D Cinabro, K. Trabelsi, J. Libby, F. Tenchini, V. Savinov, Doyen Sahoo, K. Kumara, S. H. Kim, E. Wang, J. H. Yin, S Ogawa, T. Podobnik, Tagir Aushev, Y. Onuki, Z. S. Stottler, T. Kawasaki, M. Campajola, B. Golob, N. Gabyshev, D. Červenkov, T. Sanuki, A. Garmash, N. K. Nisar, J. S. Lange, H. Hayashii, T. D. Kimmel, C. H. Kim, B. Shwartz, R. Kroeger, D. Liventsev, Y-J Kwon, Y. Jin, M. E. Sevior, P. Goldenzweig, Y. Sakai, E. Solovieva, X. P. Xu, K Kinoshita, S. Bilokin, Yang Li, Seema Bahinipati, L. Santelj, M Iwasaki, S. C. Lee, Zhiqing Zhang, Chunjie Wang, H. Ono, Leo Piilonen, Seongbae Yang, Felix Metzner, Y. Unno, DY Kim, K. K. Joo, R. Ayad, K. Cho, Victoria Zhukova, M. Shapkin, R. Pestotnik, L. Li Gioi, U. Tamponi, D. Dossett, H Aihara, and M. Watanabe

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, 01 natural sciences, Belle experiment, law.invention, Luminosity, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, Bar (unit)
Abstract

We report the first search for the penguin-dominated process $B_{s}^{0} \rightarrow \eta^{\prime} X_{s\bar{s}}$ using a semi-inclusive method. A 121.4 $\mathrm{fb}^{-1}$ integrated luminosity $\Upsilon(5S)$ data set collected by the Belle experiment, at the KEKB asymmetric-energy $e^+e^-$ collider, is used. We observe no statistically significant signal and including all uncertainties, we set a 90\% confidence level upper limit on the partial branching fraction at 1.4 $\times$ 10$^{-3}$ for $M(X_{s\bar{s}})$ $\leq$ 2.4 GeV/$c^{2}$.

Published
2021
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2. 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
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3. 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
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4. 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
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5. 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
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6. 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
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7. Measurement of the CKM matrix element |Vcb| from B0→D*−ℓ+νℓ at Belle

Author

H. Ye, R. Mizuk, K. Chilikin, C. Beleño, S. Al Said, R. Mussa, P. C. Lu, H. B. Jeon, P. Goldenzweig, A. Ishikawa, S. Sandilya, Jihwa Lee, G. Pakhlova, M. Nakao, A. Kuzmin, R. Kulasiri, P. Križan, K. Inami, K. T. Kim, S. K. Choi, Jyoti Prakash Biswal, M. Merola, S. Ogawa, M. Starič, I. Adachi, J. G. Shiu, S. Jia, S. Uno, C. Schwanda, D. Y. Kim, A. K. Giri, M. Salehi, E. Waheed, O. Grzymkowska, C. H. Wang, Y-J Kwon, A. Garmash, Phillip Urquijo, V. Gaur, D. Epifanov, S. Paul, M. Masuda, V. Bansal, G. B. Mohanty, R. Kroeger, D. Cinabro, J. E. Fast, M. E. Sevior, D. Dossett, H. Miyata, G. Schnell, F. Tenchini, M. Nayak, J. MacNaughton, D. Matvienko, T. Bilka, G. Inguglia, Tao Luo, Andrey Sokolov, R. B. Garg, E. Prencipe, K. Tanida, B. Bhuyan, G. Varner, Ya-Qiu Jin, Seokhee Park, Y. Iwasaki, T. Sumiyoshi, Samo Korpar, R. Ayad, K. Cho, H. Hayashii, P. K. Behera, P. Chang, T. Sanuki, M. Campajola, T. Kuhr, B. Golob, C.-L. Hsu, C. H. Kim, K. Nishimura, B. Shwartz, B. G. Fulsom, T. E. Browder, A. Bobrov, Peter Kodys, V.N. Zhilich, D. Ferlewicz, N. K. Nisar, W. W. Jacobs, O. Schneider, G. Bonvicini, J. S. Lange, K. Senyo, Somnath Choudhury, M. Z. Wang, K. Kinoshita, S. Pardi, A. Vinokurova, C. H. Li, Z. S. Stottler, H. E. Cho, M. T. Hedges, V.E. Shebalin, T. Kawasaki, T. Uglov, S. Di Carlo, K. Miyabayashi, I. Badhrees, S. Cunliffe, Semen Eidelman, G. Karyan, A. B. Kaliyar, M. Niiyama, Tagir Aushev, M. Uchida, J. Schueler, J. Libby, L. K. Li, V. Savinov, E. Won, H. Ono, I. Nakamura, Kevin Varvell, D. Liventsev, H. Atmacan, T. Mori, H. Aihara, K. Adamczyk, G.V. Russo, Y. Usov, Toru Iijima, A. Rostomyan, P. Wang, D. M. Asner, K. Hayasaka, W. S. Hou, V. Chekelian, Y. Unno, Z. P. Zhang, Y. Seino, B. K. Pal, M. T. Prim, P. Pakhlov, S. Nishida, Z. Natkaniec, H. Park, A. Bozek, Motoki Iwasaki, D. Kotchetkov, Y. Sakai, K. Lieret, E. Solovieva, Leo Piilonen, D. Joffe, Seongbae Yang, A. Vossen, O. Seon, Frank Simon, Vladimir Popov, M. Takizawa, Z. Doležal, B. G. Cheon, J. Haba, V. Babu, S. C. Lee, Pavel Krokovny, K. Trabelsi, R. Pestotnik, J. Kahn, C. P. Shen, Seok Kim, Victoria Zhukova, A. Chen, Felix Metzner, K. K. Joo, Yang Li, T. V. Dong, Y. Choi, K. J. Nath, T. Hara, Y. Yusa, D. Červenkov, J. F. Strube, Samo Stanič, Florian Urs Bernlochner, M. Bračko, and L. Li Gioi

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Cabibbo–Kobayashi–Maskawa matrix, Branching fraction, Electron–positron annihilation, Electroweak interaction, 01 natural sciences, 0103 physical sciences, Heavy quark effective theory, Matrix element, 010306 general physics, Two-form, Lepton
Abstract

We present a new measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| from B0→D*-l+νl decays, reconstructed with the full Belle data set of 711 fb−1 integrated luminosity. Two form factor parametrizations, originally conceived by the Caprini-Lellouch-Neubert (CLN) and the Boyd, Grinstein and Lebed (BGL) groups, are used to extract the product F(1)ηEW|Vcb| and the decay form factors, where F(1) is the normalization factor and ηEW is a small electroweak correction. In the CLN parametrization we find F(1)ηEW|Vcb|=(35.06±0.15±0.56)×10-3, ρ2=1.106±0.031±0.007, R1(1)=1.229±0.028±0.009, R2(1)=0.852±0.021±0.006. For the BGL parametrization we obtain F(1)ηEW|Vcb|=(34.93±0.23±0.59)×10-3, which is consistent with the world average when correcting for F(1)ηEW. The branching fraction of B0→D*-l+νl is measured to be B(B0→D*-l+νl)=(4.90±0.02±0.16)%. We also present a new test of lepton flavor universality violation in semileptonic B decays, B(B0→D*-e+ν)B(B0→D*-μ+ν)=1.01±0.01±0.03. The errors quoted correspond to the statistical and systematic uncertainties, respectively. This is the most precise measurement of F(1)ηEW|Vcb| and form factors to date and the first experimental study of the BGL form factor parametrization in an experimental measurement.

Published
2019
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8. 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
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9. Evidence for B+→hcK+ and observation of ηc(2S)→pp¯π+π−

Author

C. MacQueen, Y. Iwasaki, S. Nishida, O. Schneider, S. Cunliffe, P. C. Lu, R. Mizuk, K. Chilikin, C. Beleño, N. Gabyshev, D. Červenkov, A. Ishikawa, A. Chen, G. Schnell, D. M. Asner, K. Hayasaka, M. Nakao, D. Matvienko, M. Campajola, C.-L. Hsu, Peter Kodys, W. W. Jacobs, Zdenek Dolezal, S. Di Carlo, G. Karyan, U. Tamponi, A. K. Giri, J. S. H. Lee, M. Masuda, G. B. Mohanty, L. Cao, Y. Seino, Rahul Kumar, S. Jia, J. F. Strube, Y. Kato, P. Goldenzweig, S. Sandilya, F. Tenchini, Babu, M. Merola, Z. P. Zhang, Samo Korpar, T. Sumiyoshi, Jia-ju Zhang, Shoichi Watanuki, Martin Ritter, K. Inami, M. Starič, Sudhanwa Patra, K. Miyabayashi, I. Badhrees, Savinov, T. Sanuki, H. Ono, K. K. Joo, G. Pakhlova, Leo Piilonen, D. Cinabro, D. Joffe, R. Kulasiri, O. Grzymkowska, C. H. Wang, D. Y. Kim, Popov, M. Z. Wang, K. Kinoshita, S. Paul, Seongbae Yang, M. Nayak, T. Julius, Yang Li, T. V. Dong, Y. Choi, K. J. Nath, Aulchenko, R. Pestotnik, C. Kiesling, R. B. Garg, G. Varner, B. G. Fulsom, Frank Simon, T. E. Browder, T. Hara, Ya-Qiu Jin, B. G. Cheon, M. Bračko, Jyoti Prakash Biswal, Gaur, G.V. Russo, Andrey Sokolov, Y-J Kwon, H. Ye, J. K. Lee, S. Pardi, Bansal, K. Senyo, K. Lalwani, S. Uno, K. Nishimura, C. Schwanda, Li Gio, L[Li Gio, L.], H. Hayashii, W. S. Hou, D. Kotchetkov, J. Haba, R. Kroeger, J. MacNaughton, C. H. Kim, R. Ayad, K. Cho, M. E. Sevior, Massimo Berger, M. Uchida, Semen Eidelman, Z. S. Stottler, L. K. Li, D. Liventsev, J. E. Fast, Zhilich, Y. Sakai, Tao Luo, T. Mori, Y. Usov, R. Itoh, K. Tanida, C. Z. Yuan, A. Rostomyan, P. Wang, Zhukova, I. Adachi, M. Salehi, E. Solovieva, S. C. Lee, T. Bilka, R. Van Tonder, B. K. Pal, M. Watanabe, P. Pakhlov, T. Ferber, H. Park, A. Bozek, J. G. Shiu, Phillip Urquijo, J. H. Yin, Pavel Krokovny, N. K. Nisar, Bhardwaj, J. S. Lange, A. B. Kaliyar, K. Trabelsi, C. P. Shen, Seok Kim, E. Won, T. Matsuda, A. Vinokurova, D. Epifanov, A.E. Bondar, M. Takizawa, John Yelton, T. K. Pedlar, S. K. Choi, A. Garmash, Motoki Iwasaki, M. Gelb, Chekelian, P. K. Behera, W. Sutcliffe, Tagir Aushev, Y. Onuki, M. Niiyama, J. Libby, Bo Wang, A. Bobrov, and B. Shwartz

Subjects
Physics, KEKB, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Pi, Analytical chemistry, Resonance, Invariant mass, 010306 general physics, 01 natural sciences, Bar (unit)
Abstract

A search for the decays B+→hcK+ and B0→hcKS0 is performed. Evidence for the decay B+→hcK+ is found; its significance is 4.8σ. No evidence is found for B0→hcKS0. The branching fraction for B+→hcK+ is measured to be (3.7-0.9+1.0 -0.8+0.8)×10-5; the upper limit for the B0→hcKS0 branching fraction is 1.4×10-5 at 90% C.L. In addition, a study of the pp¯π+π- invariant mass distribution in the channel B+→(pp¯π+π-)K+ results in the first observation of the decay ηc(2S)→pp¯π+π- with 12.1σ significance. The analysis is based on the 711 fb-1 data sample collected by the Belle detector at the asymmetric-energy e+e- collider KEKB at the ϒ(4S) resonance.

Published
2019
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10. 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
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11. 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
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12. 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
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13. 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
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14. Search for the rare decay of B+→ℓ+νℓγ with improved hadronic tagging

Author

Victoria Zhukova, Y. Yusa, J. Gemmler, Eberhard Widmann, J. F. Strube, A. Chen, M. Nayak, M. Gelb, A. Rostomyan, X. L. Wang, G. Varner, B. G. Cheon, V. Chekelian, Ya-Qiu Jin, Jihwa Lee, R. Mizuk, R. Van Tonder, B. K. Pal, M. Takizawa, G. Schnell, S. Al Said, M. Merola, J. Haba, Z. Doležal, R. B. Garg, B. Bhuyan, B. G. Fulsom, W. Sutcliffe, T. Kuhr, V. Babu, K. Chilikin, C. Beleño, D. Y. Kim, J. H. Yin, A. Garmash, Daniel Greenwald, S. C. Lee, T. Ferber, Tagir Aushev, S. K. Choi, S. Uno, V. Savinov, C. Schwanda, Felix Metzner, D. Epifanov, N. K. Nisar, Samo Stanič, V. Bansal, J. G. Shiu, R. Pestotnik, J. S. Lange, K. K. Joo, P. Pakhlov, Phillip Urquijo, Pavel Krokovny, A. Frey, T. Uglov, P. K. Behera, V. V. Zhulanov, Yang Li, K. Senyo, T. Kawasaki, T. K. Pedlar, P. Goldenzweig, T. V. Dong, Y. Choi, Peter Kodys, W. W. Jacobs, K. J. Nath, T. Hara, L. Santelj, Jyoti Prakash Biswal, M. Uchida, F. Tenchini, C. Z. Yuan, W. S. Hou, J. Kahn, C. P. Shen, Semen Eidelman, Seok Kim, S. Sandilya, D. Liventsev, H. Miyata, E. Prencipe, R. Mussa, T. Sumiyoshi, P. C. Lu, G. Russo, V.N. Zhilich, S. Di Carlo, A. Ishikawa, M. Nakao, Martin Ritter, R. Itoh, P. Križan, A. B. Kaliyar, Florian Urs Bernlochner, P. Wang, C. Kiesling, K. Miyabayashi, I. Badhrees, Bo Wang, T. Sanuki, A. K. Giri, M. Starič, G. Pakhlova, S. Nishida, M. Masuda, R. Kulasiri, G. B. Mohanty, Z. Natkaniec, J. Schueler, E. Won, B. Shwartz, L. Cao, A. Bobrov, M. Bračko, H. Atmacan, N. Gabyshev, D. Červenkov, M. Sumihama, Motoki Iwasaki, S. Cunliffe, Y. Iwasaki, O. Schneider, J. K. Lee, V. Gaur, Deepak Kumar Sahoo, M. Niiyama, J. Libby, J. MacNaughton, Kevin Varvell, L. Li Gioi, H. Ye, Y. Tao, T. Mori, H. Aihara, J. E. Fast, Z. P. Zhang, M. Watanabe, S. Jia, T.-A. Shibata, C. H. Wang, S. Paul, K. Inami, M. Mrvar, Leo Piilonen, D. Joffe, H. Hayashii, Hyunyong Kim, S. Zakharov, Seongbae Yang, M. Z. Wang, Nils Braun, O. Seon, Frank Simon, Vladimir Popov, Y. Sakai, N. Dash, E. Solovieva, D. Kotchetkov, Y-J Kwon, R. Kroeger, M. E. Sevior, I. S. Lee, Tao Luo, K. Tanida, H. Kichimi, R. Ayad, K. Cho, S. Pardi, D. Cinabro, Y. Unno, I. Adachi, G. Inguglia, M. Salehi, Somnath Choudhury, D. M. Asner, M. Lubej, K. Hayasaka, Y. Seino, M. T. Prim, Shoichi Watanuki, A. Kuzmin, S. Ogawa, Samo Korpar, and H. Yamamoto

Subjects
Physics, Particle physics, Muon, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Hadron, Photon energy, 01 natural sciences, Belle experiment, 0103 physical sciences, High Energy Physics::Experiment, B meson, 010306 general physics, Lepton
Abstract

We present the result of the search for the rare B meson decay of B+ -> l(+)nu e gamma with l = e, mu. For the search the full data set recorded by the Belle experiment of 711 fb(-1) integrated luminosity near the Upsilon(4S) resonance is used. Signal candidates are reconstructed for photon energies E-gamma larger than 1 GeV using a novel multivariate tagging algorithm. The novel algorithm fully reconstructs the second B meson produced in the collision using hadronic modes and was specifically trained to recognize the signal signature in combination with hadronic tag-side B meson decays. This approach greatly enhances the performance. Background processes that can mimic this signature, mainly charmless semileptonic decays and continuum processes, are suppressed using multivariate methods. The number of signal candidates is determined by analyzing the missing mass squared distribution as inferred from the signal side particles and the kinematic properties of the tag-side B meson. No significant excess over the background-only hypothesis is observed and upper limits on the partial branching fraction Delta B with E-gamma > 1 GeV individually for electron and muon final states as well as for the average branching fraction of both lepton final states are reported. We find a Bayesian upper limit of Delta B(B+ -> l(+)nu el) 0.24 GeV at 90% CL.

Published
2018
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15. 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
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16. 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
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17. 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
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18. 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
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19. Observation of $$\Xi _{c}(2930)^0$$ Ξ c ( 2930 ) 0 and updated measurement of $$B^{-} \rightarrow K^{-} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$ B - → K - Λ c + Λ ¯ c - at Belle

Author

V.N. Zhilich, Y. Kato, J. K. Ahn, K. Miyabayashi, I. Badhrees, M. Niiyama, Tagir Aushev, D. Epifanov, Tao Luo, E. Widmann, F. Tenchini, S. Pardi, V. Babu, K. Tanida, M. Iwasaki, G.V. Russo, T. Sumiyoshi, K. J. Nath, G. Schnell, T. Iijima, T. K. Pedlar, Y. Iwasaki, L. Santelj, T. Sanuki, M. T. Hedges, K. T. Kim, Y. J. Kwon, M. Nayak, Byung Gu Cheon, T. Ferber, V. Gaur, L. E. Piilonen, K. Chilikin, M. Merola, X. L. Wang, T. Matsuda, O. Schneider, S. Uno, R. Itoh, C. Kiesling, Y. Sakai, V. Chekelian, G. Bonvicini, V. Vorobyev, T. Julius, A. Chen, S. Korpar, Yoshinobu Unno, K. Inami, Eleonora Guido, S. H. Kim, P. Krokovny, Vikas Bansal, A. Vossen, M. Mrvar, Chunjie Wang, K. Cho, Suyong Choi, B. Pal, Young-Il Choi, E. Nakano, S. Sandilya, Massimo Berger, T. A. Shibata, H. Miyata, A. K. Giri, J. Yelton, M. Bračko, B. Bhuyan, J. G. Shiu, Prafulla Kumar Behera, C. Van Hulse, R. Mizuk, M. Salehi, T. E. Browder, Zhicai Zhang, H. Kichimi, C. Z. Yuan, S.I. Eidelman, M. Masuda, Yong Ban, T. Kawasaki, Y. Yusa, M. Starič, M. Gelb, T. Kumita, K. Kinoshita, U. Tamponi, R. Pestotnik, M. Uchida, Y. B. Li, L. K. Li, Jyoti Prakash Biswal, Z. Drásal, H. K. Moon, Bingran Wang, Meng Wang, A. M. Bakich, Vladimir Popov, N. Dash, Z. Natkaniec, V. Bhardwaj, M. Watanabe, J. F. Strube, C. P. Shen, P. Pakhlov, G. S. Varner, R. Kulasiri, D. Kotchetkov, N. Gabyshev, D. Červenkov, Soumen Paul, E. Won, Peter Kodys, W. W. Jacobs, J. Libby, J. MacNaughton, B.A. Shwartz, M. Sumihama, K. Hayasaka, S. Nishida, H. Park, A. Bozek, A. Rostomyan, P. Wang, Rocky Bala Garg, S. Cunliffe, B. G. Fulsom, R. Mussa, S. Di Carlo, G. Karyan, I. Adachi, Gagan Bihari Mohanty, H. Ye, T. Hara, T. Mori, H. Aihara, G. Pakhlova, A. Ishikawa, A. Kuzmin, J. B. Kim, Shih-Chang Lee, Y. Seino, K. K. Joo, D. Liventsev, M. Takizawa, M. Nakao, Y. Watanabe, V.E. Shebalin, S. Ogawa, S. Al Said, C. W. Park, P. Križan, H. Hayashii, Z. Doležal, Vladimir Zhulanov, Y. Jin, W. S. Hou, R. Kroeger, D. Cinabro, E. Waheed, I. S. Lee, R. Ayad, L. Li Gioi, A. Garmash, M. Lubej, G. Inguglia, E. Solovieva, V. Zhukova, P. Goldenzweig, S. Zakharov, S. Jia, D. Y. Kim, C. Schwanda, D. M. Asner, Tara Nanut, T. Uglov, J. Haba, Andrey Sokolov, and James E. Fast

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Branching fraction, Dalitz plot, 01 natural sciences, Effective mass (spring–mass system), Charmed baryons, Product (mathematics), 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), B meson, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Energy (signal processing)
Abstract

We report the first observation of the $$\Xi _{c}(2930)^0$$ charmed-strange baryon with a significance greater than 5 $$\sigma $$ . The $$\Xi _{c}(2930)^0$$ is found in its decay to $$K^- \Lambda _{c}^+$$ in $$B^{-} \rightarrow K^{-} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$ decays. The measured mass and width are $$[2928.9 \pm 3.0(\mathrm stat.)^{+0.9}_{-12.0}(\mathrm syst.)]$$ MeV/ $$c^{2}$$ and $$[19.5 \pm 8.4(\mathrm stat.) ^{+5.9}_{-7.9}(\mathrm syst.)]$$ MeV, respectively, and the product branching fraction is $$\mathcal{B}(B^{-} \rightarrow \Xi _{c}(2930)^0 \bar{\Lambda }_{c}^{-}) \mathcal{B}(\Xi _{c}(2930)^0 \rightarrow K^- \Lambda _{c}^{+})=[1.73 \pm 0.45(\mathrm stat.) \pm 0.21(\mathrm syst.)]\times 10^{-4}$$ . We also measure $$\mathcal{B}(B^{-} \rightarrow K^{-} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}) = [4.80 \pm 0.43(\mathrm stat.) \pm 0.60(\mathrm syst.)] \times 10^{-4}$$ with improved precision, and search for the charmonium-like state Y(4660) and its spin partner, $$Y_{\eta }$$ , in the $$\Lambda _{c}^{+}\bar{\Lambda }_{c}^{-}$$ invariant mass spectrum. No clear signals of the Y(4660) nor its spin partner are observed and the 90% credibility level (C.L.) upper limits on their production rates are determined. These measurements are obtained from a sample of $$(772\pm 11)\times 10^{6} B\bar{B}$$ pairs collected at the $$\Upsilon (4S)$$ resonance by the Belle detector at the KEKB asymmetric energy electron–positron collider.

Published
2018
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20. Measurement of branching fractions of hadronic decays of the <math><msubsup><mi>Ω</mi><mi>c</mi><mn>0</mn></msubsup></math> baryon

Author

K. Suzuki, V. Babu, N. Dash, D. Kotchetkov, T. Ferber, Meng Wang, J. Yelton, Y. Guan, Vikas Bansal, E. Nakano, Elisa Guido, T. Matsuda, D. Matvienko, Y. Yusa, G. Schnell, T. Iijima, A. J. Schwartz, Leo Piilonen, D. Joffe, M. Takizawa, J. Haba, S. Uno, P. Krian, R. Mussa, R. Ayad, K. Cho, A. Vossen, H. B. Jeon, Shih-Chang Lee, H. K. Moon, Jasvinder A. Singh, J. S. Lange, A. Ishikawa, H. Atmacan, Y. Seino, M. Nakao, C. W. Park, Y. Watanabe, J. G. Shiu, T. Kuhr, N. Shimizu, Tariq Aziz, A.E. Bondar, B.A. Shwartz, Pavel Krokovny, V.N. Zhilich, S. Sandilya, S. H. Kim, Yang Li, Kiyoshi Tanida, T. E. Browder, T. Kawasaki, K. J. Nath, Andrey Sokolov, Young-Il Choi, Tagir Aushev, M. Uchida, M. Starič, D. Liventsev, L. K. Li, A. Bobrov, K. Miyabayashi, Y. Sakai, T. A. Shibata, Iki Adachi, V. Bhardwaj, Doo Young Kim, V. Savinov, Vladimir Zhulanov, James E. Fast, X. L. Wang, H. Miyata, Prafulla Kumar Behera, M. Gelb, R. Kroeger, M. E. Sevior, I. S. Lee, V.M. Aulchenko, T. Luo, C. P. Shen, Soumen Paul, Semen Eidelman, H. Ye, T. K. Pedlar, T. Kumita, J. B. Kim, S. Nishida, P. Goldenzweig, E. Solovieva, P. Wang, R. Kulasiri, M. Sumihama, G. Russo, H. Park, A. Bozek, V. Vorobyev, M. Iwasaki, B. G. Cheon, Y. Iwasaki, Y. J. Kwon, J. Libby, D. M. Asner, M. Lubej, K. Hayasaka, V. Chekelian, R. Itoh, J. F. Strube, O. Schneider, T. Nanut, S. Korpar, R. Mizuk, B. G. Fulsom, Chunjie Wang, S. Pardi, S. Okuno, A. Garmash, D. Servenkov, Y. Jin, M. Niiyama, H. Kichimi, H. Hayashii, S. Zakharov, G. Inguglia, V. Zhukova, P. Chang, A. Kuzmin, Somnath Choudhury, S. Ogawa, W. S. Hou, F. Tenchini, E. Waheed, T. Uglov, K. Kinoshita, U. Tamponi, T. Czank, M. Merola, A. Zupanc, Peter Kodys, W. W. Jacobs, E. Won, R. Pestotnik, G. Pakhlova, S. Di Carlo, M. Nayak, G. Karyan, A. Chen, V. Gaur, P. Pakhlov, C. Kiesling, G. Varner, M. Bračko, Yoshinobu Unno, Suyong Choi, Rocky Bala Garg, S. Al Said, A. K. Giri, M. Masuda, Gagan Bihari Mohanty, L. Li Gioi, A. M. Bakich, Yongsun Kim, K. Lalwani, C. Schwanda, D. Cinabro, N. Gabyshev, V.E. Shebalin, Vladimir Popov, K. Chilikin, K. Inami, M. C. Chang, Zhicai Zhang, N. K. Nisar, I. Pavelkin, T. Julius, T. Sumiyoshi, Martin Ritter, T. Sanuki, Jyoti Prakash Biswal, H. J. Kim, H. Aihara, T. Hara, T. Mori, D. Greenwald, Y. Usov, E. Widmann, B. Pal, Massimo Berger, Z. Doleal, and C. Z. Yuan

Subjects
Physics, Annihilation, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Hadron, Analytical chemistry, 01 natural sciences, Omega, ddc, Baryon, KEKB, 0103 physical sciences, Pi, High Energy Physics::Experiment, 010306 general physics
Abstract

Using a data sample of 980 fb−1 of e+e− annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy e+e− collider, we report the results of a study of the decays of the Ωc0 charmed baryon into hadronic final states. We report the most precise measurements to date of the relative branching fractions of the Ωc0 into Ω−π+π0, Ω−π+π−π+, Ξ−K−π+π+, and Ξ0K−π+, as well as the first measurements of the branching fractions of the Ωc0 into Ξ−K¯0π+, Ξ0K¯0, and ΛK¯0K¯0, all with respect to the Ω−π+ decay. In addition, we investigate the resonant substructure of these modes. Finally, we present a limit on the branching fraction for the decay Ωc0→Σ+K−K−π+.

Published
2018

21. Search for CP violation in the D+→π+π0 decay at Belle

Author

H. J. Kim, M. Nayak, C. H. Wang, C. Van Hulse, K. T. Kim, A. Rostomyan, D. Joffe, B. K. Pal, Kiyoshi Tanida, Jyoti Prakash Biswal, K. Prasanth, Z. Doležal, T. Uglov, P. K. Resmi, A. Zupanc, M. Gelb, J. S. Lange, D. Dutta, E. Guido, H. B. Jeon, Pavel Krokovny, V. Zhukova, P. Goldenzweig, A. Ishikawa, V. Savinov, J. H. Kang, S. Sandilya, Y. Yamashita, M. Iwasaki, Prafulla Kumar Behera, Y. Choi, M. Nakao, V. Shebalin, A. B. Kaliyar, R. Pestotnik, Junho Kim, T. Julius, K. Cho, M. Masuda, A. Kuzmin, T. Kawasaki, D. Greenwald, H. Ye, V. Bansal, E. Won, Wei-Shu Hou, L. K. Li, R. Kroeger, T. Ferber, D. Liventsev, S. Jia, H. Park, Zhengkang Zhang, D. Matvienko, V. Popov, G. Pakhlova, D. Y. Kim, B. Shwartz, T. Nanut, M. Berger, O. Schneider, W. Ostrowicz, C. Z. Yuan, E. Nakano, M. Niiyama, G. Russo, Iki Adachi, S. E. Vahsen, L. Santelj, P. Pakhlov, Samo Korpar, D. Epifanov, J. Libby, S. Pardi, T. Horiguchi, I. Badhrees, N. K. Nisar, A. Sokolov, A. Garmash, Y. Guan, K. Trabelsi, Eberhard Widmann, J. F. Strube, N. Gabyshev, Phillip Urquijo, M. Ritter, V. Zhilich, Y. Jin, M. Sumihama, S. Nishida, S. Ogawa, M. Salehi, G. Schnell, T. E. Browder, B. G. Fulsom, Y. Sakai, V. Bhardwaj, L. Li Gioi, F. Tenchini, M. T. Hedges, J. Haba, Chawon Park, Sayantan Choudhury, P. Križan, E. Waheed, V. Babu, S. Di Carlo, Z. Natkaniec, A. Chen, V. V. Zhulanov, K. Senyo, Y. Ono, D. M. Asner, M. Lubej, K. Hayasaka, K. Kinoshita, G. Karyan, K. Inami, J. Rauch, P. Wang, D. Kotchetkov, R. Itoh, Takao Mori, W. W. Jacobs, B. G. Cheon, Y. Yusa, H. Ono, O. Seon, R. Mizuk, Y. Seino, S. Uno, R. Ayad, M. Mrvar, Semen Eidelman, M. Takizawa, T. Sumiyoshi, C. Pulvermacher, S. Okuno, D. Červenkov, H. Hayashii, P. Kodyš, Hitoshi Miyata, S. Zakharov, A. Bobrov, H. Aihara, M. Merola, S. H. Kim, C. Kiesling, P. Katrenko, T. Sanuki, Y. Unno, B. Golob, K. Chilikin, Kevin Varvell, T. Luo, V. Gaur, U. Tamponi, M. Bračko, G. B. Mohanty, Y-J Kwon, S. Bahinipati, C. P. Shen, J. G. Shiu, M. Starič, Y. Usov, M. E. Sevior, G. Varner, Y. Watanabe, S. Al Said, T. Kuhr, R. Kumar, R. Kulasiri, K. H. Kang, A. M. Bakich, K. K. Joo, T. A. Shibata, Y. J. Kim, C. Schwanda, D. Cinabro, S. Stanič, Z. Drásal, T. Aziz, K. J. Nath, Ihn Sik Seong, M. Uchida, H. Atmacan, J. E. Fast, Meng Wang, Bingran Wang, A. J. Schwartz, A. Bozek, N. Dash, E. Solovieva, K. Miyabayashi, T. Matsuda, S. Paul, Leo Piilonen, Frank Simon, and H. Yamamoto

Subjects
Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 01 natural sciences, Belle experiment, law.invention, KEKB, law, 0103 physical sciences, CP violation, High Energy Physics::Experiment, Charm (quantum number), 010306 general physics, Collider
Abstract

We search for CP violation in the charged charm meson decay D+ -> pi(+)pi(0), based on a data sample corresponding to an integrated luminosity of 921 fb(-1) collected by the Belle experiment at the KEKB e(+)e(-) asymmetric-energy collider. The measured CP-violating asymmetry is [+2.31 +/- 1.24(stat) +/- 0.23(syst)] %, which is consistent with the standard model prediction and has a significantly improved precision compared to previous results.

Published
2018
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22. 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
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23. 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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24. Search for CP Violation and Measurement of the Branching Fraction in the Decay D0→KS0KS0

Author

S. Al Said, K. Sumisawa, Andrey Sokolov, Saraju P. Mohanty, M. Masuda, M. T. Hedges, Yongsun Kim, C. Schwanda, Luka Santelj, Liangbin Li, S. Eidelman, V. Chekelian, M. C. Chang, T. A. Shibata, D. Epifanov, H. Park, A. Bozek, H. Miyata, M. Uchida, B. Bhuyan, Yuki Sato, V. Savinov, R. Mizuk, Victoria Zhukova, V. Bhardwaj, N. K. Nisar, L. E. Piilonen, P. Katrenko, A. Zupanc, A. J. Schwartz, James E. Fast, A. Bobrov, H. Ono, K. M. Williams, K. Inami, Yang Li, Y. Choi, K. J. Nath, A. Chen, T. K. Pedlar, V. Babu, G. Schnell, T. Iijima, E. Won, G. S. Varner, T. Luo, A. Rostomyan, Yu. V. Usov, Z. P. Zhang, Y. Iwasaki, T. Julius, J. G. Shiu, T. Kuhr, K. Chilikin, M. Merola, B. Pal, C. Kiesling, M. Niiyama, L. Pesántez, T. Aushev, Y. Yook, Y. Sakai, Y. J. Kwon, T. Ferber, M. Z. Wang, K. Kinoshita, B. G. Fulsom, S. Uno, V.E. Shebalin, D. M. Asner, G. Pakhlova, Y. Unno, Peter Kodys, W. W. Jacobs, J. Stypula, L. Li Gioi, A. Garmash, C. S. Park, G. Bonvicini, F. Tenchini, G. B. Mohanty, O. Schneider, R. Ayad, Seema Bahinipati, S. Di Carlo, Y. Yusa, K. Senyo, T. Sumiyoshi, M. Bračko, C. Z. Yuan, V.N. Zhilich, G. Karyan, Phillip Urquijo, Jyoti Prakash Biswal, R. Pestotnik, Vikas Bansal, D. Joffe, A. B. Kaliyar, H. K. Moon, Martin Ritter, J. S. Lange, P. L. Wang, S. H. Kim, P. Krokovny, E. Nakano, T. Sanuki, Rakesh Kumar, V. Gaur, D. Y. Kim, Z. Drásal, K. Cho, Soumen Paul, W. S. Hou, J. F. Strube, K. Trabelsi, J. Kahn, I. Jaegle, K. Miyabayashi, I. Badhrees, C. P. Shen, C. Van Hulse, R. Mussa, A. M. Bakich, H. Hayashii, H. B. Jeon, I. Adachi, V. Vorobyev, K. K. Joo, A. Ishikawa, M. Nakao, F. Breibeck, S. Sandilya, P. Križan, Dipanwita Dutta, J. B. Kim, H. J. Kim, T. Kawasaki, M. J. Kim, H. Farhat, B. G. Cheon, N. Gabyshev, D. Červenkov, M. Starič, T. Kumita, R. Itoh, Eberhard Widmann, A. Bondar, S. Korpar, D. Matvienko, D. Kotchetkov, T. Hara, T. Mori, H. Aihara, V. M. Aulchenko, E. L. Barberio, R. Kulasiri, M. Takizawa, Y. Watanabe, B. Shwartz, John Yelton, Z. Doležal, K. T. Kim, R. Gillard, J. Libby, K. Hayasaka, C. H. Li, Y. Seino, D. Cinabro, M. Lubej, S. Pardi, S. Okuno, M. Watanabe, T. E. Browder, U. Tamponi, C. H. Wang, Y. Yamashita, H. Ye, K. Prasanth, H. Sahoo, Tara Nanut, T. Uglov, A. Kuzmin, S. Ogawa, E. Waheed, S. Nishida, N. Dash, Z. Natkaniec, K. Tanida, M. Nayak, P. Pakhlov, J. Haba, D. Liventsev, Vladimir Zhulanov, Y. Jin, M. E. Sevior, I. S. Lee, P. Goldenzweig, E. Solovieva, A. Vossen, and Frank Simon

Subjects
Physics, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Electron–positron annihilation, Analytical chemistry, General Physics and Astronomy, 01 natural sciences, Asymmetry, law.invention, Standard Model, KEKB, law, 0103 physical sciences, CP violation, 010306 general physics, Collider, media_common
Abstract

We report a study of the decay D-0 -> (KSKS0)-K-0 using 921 fb(-1) of data collected at or near the (sic)(4S) and (sic)(5S) resonances with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider. The measured time-integrated CP asymmetry is A(CP)(D-0 -> (KSKS0)-K-0) = (-0.02 +/- 1.53 +/- 0.02 +/- 0.17)%, and the branching fraction is B(D-0 -> (KSKS0)-K-0) = (1.321 +/- 0.023 +/- 0.036 +/- 0.044) x 10(-4), where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D-0 -> K-S(0)pi(0)). These results are significantly more precise than previous measurements available for this mode. The A(CP) measurement is consistent with the standard model expectation.

Published
2017
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25. Search for Λc+→ϕpπ0 and branching fraction measurement of Λc+→K−π+pπ0

Author

K. Chilikin, K. Inami, M. Z. Wang, K. Kinoshita, U. Tamponi, J. F. Strube, H. Hayashii, T. A. Shibata, H. Miyata, Elisa Guido, Prafulla Kumar Behera, S.I. Eidelman, G. Schnell, Jyoti Prakash Biswal, T. Kuhr, V.N. Zhilich, B. G. Cheon, M. Niiyama, I. Adachi, K. T. Kim, K. Miyabayashi, I. Badhrees, M. Bračko, R. Itoh, T. Aushev, J. B. Kim, S. K. Choi, S. Korpar, P. Pakhlov, T. Ferber, S. Ogawa, Gagan Bihari Mohanty, A. J. Schwartz, Andrey Sokolov, J. G. Shiu, S. Nishida, H. Ono, R. Mizuk, D. Matvienko, A. M. Bakich, A. Zupanc, A. Bozek, M. Takizawa, R. Mussa, H. B. Jeon, E. Widmann, M. Uchida, A. Ishikawa, D. M. Asner, M. Nayak, S. Uno, M. Nakao, N. Gabyshev, D. Červenkov, John Yelton, V. Bhardwaj, Z. Doležal, R. Kulasiri, T. Nanut, M. Sumihama, Vikas Bansal, K. Tanida, E. Nakano, A. Vinokurova, A. Chen, G. S. Varner, T. Luo, Y. Yamashita, Liangbin Li, A. Rostomyan, Y. J. Kwon, C. Van Hulse, Z. Drásal, B. Pal, V. Chekelian, Massimo Berger, S. H. Kim, P. Krokovny, H. Ye, B. G. Fulsom, O. Schneider, Peter Kodys, T. Uglov, W. W. Jacobs, C. Z. Yuan, R. Ayad, Soumen Paul, K. Cho, T. E. Browder, A. Bobrov, S. Di Carlo, D. Liventsev, Y. Watanabe, S. Sandilya, D. Cinabro, V. Savinov, Vladimir Zhulanov, Y. Jin, M. E. Sevior, G. Karyan, I. Jaegle, D. Y. Kim, P. Goldenzweig, M. Starič, M. Merola, M. Watanabe, K. Senyo, R. Pestotnik, S. Jia, V. Zhukova, C. H. Wang, T. K. Pedlar, V. Gaur, D. Joffe, Y. Kato, Yang Li, Y. Choi, K. J. Nath, L. Santelj, Y. Sakai, S. Pardi, S. Al Said, Yongsun Kim, C. Schwanda, J. Libby, M. Lubej, K. Hayasaka, C. H. Li, C. L. Hsu, Y. Seino, Shoichi Watanuki, K. K. Joo, E. Won, H. K. Moon, W. S. Hou, V. Vorobyev, J. MacNaughton, L. E. Piilonen, Z. P. Zhang, Kevin Varvell, T. Hara, T. Mori, H. Aihara, F. Tenchini, T. Sumiyoshi, Martin Ritter, T. Sanuki, X. L. Wang, E. Solovieva, Frank Simon, N. Dash, G. Pakhlova, D. Kotchetkov, L. Li Gioi, A. Garmash, and C. S. Park

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Analytical chemistry, Lambda, 01 natural sciences, Belle experiment, Luminosity, Charmed baryons, KEKB, 0103 physical sciences, Pi, 010306 general physics
Abstract

We have searched for the Cabibbo-suppressed decay Lambda(+)(c) -> pi p(0) in e(+) e(-) collisions using a data sample corresponding to an integrated luminosity of 915 fb(-1). The data were collected by the Belle experiment at the KEKB e(+) e(-) asymmetric-energy collider running at or near the (4S) and (5S) resonances. No significant signal is observed, and we set an upper limit on the branching fraction of B(Lambda(+)(c) -> phi p(0)) K+ K- p pi(0) decays is found to be consistent with zero, and the corresponding upper limit on its branching fraction is set to be B(Lambda(+)(c) ->. K+ K- p pi(0))(NR) phi p. We see no evidence for this intermediate decay and set an upper limit on the product branching fraction of B(Lambda(+)(c) -> P-s(+) pi(0)) x B(P-s(+) -> phi p) K- pi(+) p pi(0);the result is B(Lambda(+)(c) -> K- pi(+) p pi(0)) = (4.42 +/- 0.05(stat)+/- 0.12(syst)+/- 0.16(norm))%, which is the most precise measurement to date.

Published
2017
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26. Measurement of the branching fraction and CP asymmetry in B0→π0π0 decays, and an improved constraint on ϕ2

Author

H. Farhat, Vikas Bansal, E. Nakano, G. B. Mohanty, D. Liventsev, C. Van Hulse, A. Zupanc, Vladimir Zhulanov, Y. Jin, M. E. Sevior, I. S. Lee, Y. Yusa, M. Barrett, B. Bhuyan, B. Pal, Massimo Berger, Dipanwita Dutta, Yuki Sato, C. Z. Yuan, M. Nayak, P. Goldenzweig, D. Joffe, T. E. Browder, F. Tenchini, K. Tanida, A. Bobrov, B. G. Cheon, T. Sumiyoshi, M. Z. Wang, K. Kinoshita, U. Tamponi, A. Kuzmin, M. Merola, C. Pulvermacher, Martin Ritter, S. Sandilya, Yang Li, S. Nishida, A.E. Bondar, Y. Choi, K. J. Nath, S. Pardi, I. Adachi, V. Savinov, G. Schnell, T. Iijima, M. J. Kim, L. Santelj, S. Ogawa, M. Starič, K. Senyo, D. Dossett, T. Matsuda, S. Uno, T. Sanuki, K. M. Williams, Y. Sakai, A. Chen, C. H. Wang, R. Itoh, J. B. Kim, T. Kuhr, G. Bonvicini, L. E. Piilonen, Peter Kodys, W. W. Jacobs, E. Waheed, Z. Doležal, P. Katrenko, Y. Yamashita, Youngjoon Kwon, K. Chilikin, A. J. Schwartz, R. Mussa, K. T. Kim, R. Gillard, E. Won, T. Kawasaki, S. H. Kim, P. Krokovny, H. Ye, K. Inami, S. Korpar, P. Pakhlov, A. Ishikawa, K. Cho, L. Pesántez, M. Nakao, Y. Iwasaki, K. Trabelsi, J. Kahn, S. Di Carlo, P. Križan, J. Haba, S. Uehara, R. Ayad, H. Hayashii, H. Sahoo, V.N. Zhilich, M. Uchida, T. Julius, K. K. Joo, O. Schneider, Tara Nanut, J. F. Krohn, J. G. Shiu, T. Uglov, T. Bloomfield, Andrey Sokolov, V. Bhardwaj, G. Karyan, D. Y. Kim, V. Babu, Phillip Urquijo, V.E. Shebalin, M. Watanabe, I. Jaegle, K. Miyabayashi, T. Aushev, I. Badhrees, R. Kulasiri, H. Park, A. Bozek, T. Ferber, R. Pestotnik, G. S. Varner, H. Ono, R. Mizuk, Z. Drásal, T. Luo, T. A. Shibata, H. Miyata, V. Gaur, S.I. Eidelman, James E. Fast, P. Wang, W. S. Hou, B. G. Fulsom, Liangbin Li, D. M. Asner, D. Cinabro, Y. Unno, V. Chekelian, M. Masuda, H. K. Moon, J. S. Lange, S. Al Said, Y. Watanabe, J. Libby, Y. Chao, K. Hayasaka, C. H. Li, Yongsun Kim, C. L. Hsu, C. Schwanda, Y. Seino, V.M. Aulchenko, E. L. Barberio, A. Garmash, C. S. Park, G. Pakhlova, L. Li Gioi, N. Dash, D. Kotchetkov, M. C. Chang, M. Salehi, A. Vossen, Kevin Varvell, T. Hara, E. Solovieva, T. Mori, H. Aihara, Y. Usov, N. K. Nisar, Z. P. Zhang, Jyoti Prakash Biswal, J. MacNaughton, H. J. Kim, C. Kiesling, M. Bračko, Eberhard Widmann, A. M. Bakich, Z. Natkaniec, N. Gabyshev, D. Červenkov, and B.A. Shwartz

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, media_common.quotation_subject, Resonance, 01 natural sciences, Asymmetry, KEKB, 0103 physical sciences, Pi, CP violation, 010306 general physics, media_common, Bar (unit)
Abstract

We measure the branching fraction and CP violation asymmetry in the decay B-0 -> pi(0)pi(0), using a data sample of 752 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. The obtained branching fraction and direct CP asymmetry are B(B -> pi(0)pi(0)) = [1.31 +/- 0.19(stat) +/- 0.19(syst)] x 10(-6) and A(CP) = +0.14 +/- 0.36(stat) +/- 0.10(syst), respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle's earlier measurements of B-0 -> pi(+)pi(-) and B-+/- -> pi(+/-)pi(0) to exclude the CP-violating parameter phi(2) from the range 15.5 degrees < phi(2) < 75.0 degrees at 95% confidence level.

Published
2017
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27. Measurement of branching fraction and direct CP asymmetry in charmless B+→K+K−π+ decays at Belle

Author

Kevin Varvell, S. Eidelman, T. Mori, H. Aihara, K. T. Kim, D. Y. Kim, D. Matvienko, Eberhard Widmann, L. Pesántez, Melissa K. Takahashi, O. Schneider, J. Libby, V. Bhardwaj, T. K. Pedlar, Y. Usov, Tao Luo, Jyoti Prakash Biswal, Y. Seino, R. Ayad, Yukinori Sato, I. Adachi, J. G. Shiu, H. Farhat, M. Masuda, G. B. Mohanty, J. B. Kim, H. Ono, T. Aushev, Y. Watanabe, B. Shwartz, V. Gaur, F. Tenchini, V.E. Shebalin, Phillip Urquijo, S. Okuno, Y. Unno, T. Matsuda, P. Goldenzweig, M. Nakao, Chawon Park, V. V. Zhulanov, H. Park, A. Bozek, D. Joffe, S. Sandilya, A.E. Bondar, K. Chilikin, M. J. Kim, G. Bonvicini, Martin Ritter, T. Sanuki, G. Schnell, M. Takizawa, C. B. Van Hulse, M. Starič, Y. Onuki, R. Mussa, H. B. Jeon, K. M. Williams, A. Ishikawa, D. Cinabro, Y.-T. Lai, Y-J Kwon, B. G. Cheon, M. T. Hedges, M. Lubej, G. Inguglia, B. Bhuyan, T. Bloomfield, Frank Simon, C. Kiesling, B. G. Fulsom, T. E. Browder, P. Krokovny, P. Chang, M. Nayak, M. E. Sevior, C.-L. Hsu, K. H. Kang, K. Cho, Z. Natkaniec, Y. Sakai, H. Hayashii, Hyunyong Kim, Ya-Qiu Jin, K. K. Joo, T. Kuhr, V. M. Aulchenko, M. Bračko, Z. P. Zhang, Peter Kodys, W. W. Jacobs, B. Golob, S. Al Said, P. Katrenko, V. Savinov, H. Miyata, K. Hayasaka, A. Zupanc, E. L. Barberio, S. Ogawa, T.-A. Shibata, Zdenek Dolezal, V.N. Zhilich, S. Korpar, N. K. Nisar, N. Dash, O. Grzymkowska, C. H. Wang, J. Haba, Z. Drásal, A. M. Bakich, A. Garmash, L. E. Piilonen, G. Pakhlova, R. Kulasiri, I. Jaegle, S. Paul, K. Miyabayashi, I. Badhrees, J. S. Lange, K. Senyo, S. Di Carlo, S. Nishida, E. Solovieva, Massimo Berger, L. Li Gioi, Y. Yamashita, N. Gabyshev, E. Waheed, T. Julius, E. Nakano, T. Kawasaki, K. Inami, Seok Kim, R. Mizuk, A. B. Kaliyar, R. Chistov, M. Z. Wang, D. Kotchetkov, P. K. Behera, H. Ye, F. Strube, Y. Choi, K. J. Nath, X. L. Wang, T. Hara, V. Chekelian, S. Uno, C. Schwanda, M. Uchida, L. K. Li, C. W. Park, E. Won, B. K. Pal, Eleonora Guido, C. H. Li, Victoria Zhukova, D. Liventsev, A. Chen, K. Sumisawa, D. M. Asner, J. E. Fast, D. Dossett, H. Atmacan, G. S. Varner, M. Watanabe, P. Krizan, Tara Nanut, T. Uglov, A. Rostomyan, W. S. Hou, Alexei Kuzmin, and V. Vorobyev

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Electron–positron annihilation, Resonance, 01 natural sciences, Asymmetry, Nuclear physics, KEKB, 0103 physical sciences, CP violation, Invariant mass, B meson, 010306 general physics, media_common
Abstract

We report a study of the charmless hadronic decay of the charged B meson to the three-body final state K+K-pi(+). The results are based on a data sample that contains 772 x 10(6) B (B) over bar pairs collected at the Y (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The measured inclusive branching fraction and direct CP asymmetry are (5.38 +/- 0.40 +/- 0.35) x 10(-6) and -0.170 +/- 0.073 +/- 0.017, respectively, where the first uncertainties are statistical and the second are systematic. The K+K- invariant mass distribution of the signal candidates shows an excess in the region below 1.5 GeV/c(2), which is consistent with the previous studies from BABAR and LHCb. In addition, strong evidence of a large direct CP asymmetry is found in the low K+K- invariant-mass region.

Published
2017
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28. Observation of D0→ρ0γ and Search for CP Violation in Radiative Charm Decays

Author

A. Ishikawa, A. Garmash, C. S. Park, M. Nakao, C. W. Park, Marko Petrič, Jyoti Prakash Biswal, A. M. Bakich, A. Bondar, S. Korpar, I. Jaegle, Yang Li, V.N. Zhilich, Y. Choi, K. J. Nath, M. Nayak, J. Rauch, V. Gaur, J. Libby, J. G. Shiu, M. Lubej, K. Hayasaka, C. H. Li, K. T. Kim, K. Miyabayashi, I. Badhrees, K. Trabelsi, K. Senyo, Semen Eidelman, M. Masuda, C. P. Shen, Luka Santelj, C. Pulvermacher, F. Tenchini, S. Sandilya, V. Babu, T. Aushev, N. K. Nisar, T. E. Browder, H. Park, A. Bozek, M. J. Kim, T. Ferber, R. Gillard, B. G. Cheon, Y. Sakai, Y. Seino, S. K. Choi, G. Schnell, T. Iijima, N. Gabyshev, D. Červenkov, T. Sumiyoshi, Victoria Zhukova, Martin Ritter, A. Vossen, O. Seon, R. Ayad, Y. Yamashita, M. Uchida, L. Li Gioi, S. Okuno, A. Chen, V. Bhardwaj, A. Kuzmin, J.E. Fast, T. K. Pedlar, M. Starič, T. Sanuki, S. Ogawa, T. Kuhr, Soumen Paul, R. Kulasiri, D. Liventsev, Vladimir Zhulanov, N. Dash, M. E. Sevior, I. S. Lee, P. Goldenzweig, T. Matsuda, S. Al Said, D. Y. Kim, S. Uno, A. B. Kaliyar, M. Bračko, G. S. Varner, D. Cinabro, K. Prasanth, H. K. Moon, A. Vinokurova, Eberhard Widmann, T. Nanut, Liangbin Li, Peter Kodys, W. W. Jacobs, J. S. Lange, D. Matvienko, G. Inguglia, S. H. Kim, V. M. Aulchenko, U. Tamponi, A. Rostomyan, R. Pestotnik, Y. Ushiroda, K. H. Kang, K. Cho, L. Pesántez, Samo Stanič, S. Di Carlo, A. Zupanc, J. Yamaoka, M. Takizawa, G. B. Mohanty, V. Chekelian, Y. J. Kwon, B. G. Fulsom, E. Solovieva, Y. Watanabe, K. Inami, R. Mizuk, L. E. Piilonen, I. Adachi, O. Schneider, B. Shwartz, C. H. Wang, John Yelton, Z. Doležal, J. B. Kim, B. Pal, C. Schwanda, W. S. Hou, T. Julius, D. Joffe, Hiroaki Aihara, J. Stypula, T. A. Shibata, J. F. Strube, Z. P. Zhang, H. Miyata, Prafulla Kumar Behera, Y. Iwasaki, V. Vorobyev, H. Hayashii, T. Kawasaki, Yuki Sato, P. Krokovny, R. Chistov, K. Kinoshita, V. Savinov, V.E. Shebalin, K. K. Joo, E. Won, Vikas Bansal, D. M. Asner, T. Schlüter, Dipanwita Dutta, P. L. Wang, Meng Wang, P. Pakhlov, H. Farhat, B. Golob, S. Nishida, A. J. Schwartz, and G. Pakhlova

Subjects
Physics, Particle physics, KEKB, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Radiative transfer, General Physics and Astronomy, CP violation, 010306 general physics, 01 natural sciences
Abstract

We report the first observation of the radiative charm decay D-0 -> rho(0)gamma and the first search for CP violation in decays D-0 -> rho(0)gamma, phi gamma, and (K) over bar (*0)(892)gamma, using a data sample of 943 fb(-1) collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The branching fraction is measured to be B(D-0 -> rho(0)gamma) = (1.77 +/- 0.30 +/- 0.07) x 10(-5), where the first uncertainty is statistical and the second is systematic. The obtained CP asymmetries A(CP)(D-0 ->rho(0)gamma) = +0.056 +/- 0.152 +/- 0.006, A(CP)(D-0 -> phi gamma) = -0.094 +/- 0.066 +/- 0.001, and A(CP)(D-0 -> (K) over bar (*0) gamma = -0.003 +/- 0.020 +/- 0.000 are consistent with no CP violation. We also present an improved measurement of the branching fractions B(D-0 -> phi gamma) = (2.76 +/- 0.19 +/- 0.10) x 10(-5) and B(D-0 -> (K) over bar (*0) gamma = (4.66 +/- 0.21 +/- 0.21) x 10(-4).

Published
2017
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29. Search for the 0−− glueball in ϒ(1S) and ϒ(2S) decays

Author

M. Niiyama, H. Miyata, S. Ogawa, Tao Luo, A. Zupanc, K. Tanida, R. Mizuk, M. Uchida, L. K. Li, S. Okuno, G. Pakhlova, R. Kulasiri, J. G. Shiu, K. Suzuki, T. Matsuda, H. Farhat, J. B. Kim, H. Kichimi, L. Li Gioi, Y. Yamashita, G. Schnell, Phillip Urquijo, M. Nayak, T. Julius, D. Y. Kim, R. Ayad, B. Golob, E. Barberio, G. Varner, Hiroaki Aihara, P. Goldenzweig, K. Chilikin, Y. J. Kim, G. Bonvicini, N. K. Nisar, C. Z. Yuan, Eberhard Widmann, B. G. Cheon, T. Kuhr, H. K. Moon, J. F. Strube, S. Sandilya, J. Libby, M. Lubej, D. Matvienko, Leo Piilonen, Y. B. Li, M. Takizawa, J. S. Lange, M. Masuda, D. Joffe, A. Bozek, M. J. Kim, A. Garmash, Dipanwita Dutta, C. H. Li, M. Sumihama, R. Itoh, C. P. Shen, Y. Seino, John Yelton, Y. Choi, Z. Doležal, K. Hayasaka, H. Ye, S. H. Kim, M. T. Hedges, M. E. Sevior, V. Babu, K. T. Kim, D. Cinabro, Samo Korpar, T. Aushev, Jyoti Prakash Biswal, R. Gillard, K. H. Kang, K. Cho, G. Inguglia, S. Uno, Frank Simon, N. Gabyshev, T. Ferber, K. Senyo, V.N. Zhilich, S. K. Choi, D. Liventsev, P. Chang, D. M. Asner, T. Sumiyoshi, C. Pulvermacher, Martin Ritter, F. Tenchini, Andrey Sokolov, Peter Kodys, E. Won, M. Starič, I. Jaegle, K. Miyabayashi, T. Kawasaki, T. Nanut, P. Katrenko, I. Badhrees, R. Pestotnik, I. Adachi, T. E. Browder, P. Wang, T. Sanuki, Meng Wang, V.E. Shebalin, V. Gaur, Chawon Park, K. K. Joo, S. Di Carlo, M. Nakao, V. V. Zhulanov, S. Al Said, Z. Drásal, Y. J. Kwon, J. Haba, B. Shwartz, J. E. Fast, K. J. Nath, O. Schneider, T. Uglov, A. M. Bakich, T. Hara, L. Santelj, Semen Eidelman, Y. Onuki, N. Dash, A. Ishikawa, W. S. Hou, E. Solovieva, P. Križan, H. Ono, V. Vorobyev, Y. Watanabe, T. Mori, Y. Usov, D. Kotchetkov, Y. Sakai, H. Hayashii, Toru Iijima, W. Ostrowicz, U. Tamponi, P. Krokovny, Hyunyong Kim, Z. P. Zhang, S. Nishida, C. H. Wang, S. Jia, C. Schwanda, T.-A. Shibata, Victoria Zhukova, A. Chen, D. Červenkov, K. Inami, Z. Natkaniec, C. Kiesling, M. Bračko, V. Bansal, P. K. Behera, C. B. Van Hulse, H. Park, A. Kuzmin, B. Bhuyan, B. G. Fulsom, V. Savinov, A. Rostomyan, V. Chekelian, B. K. Pal, and Y. Unno

Subjects
Nuclear physics, Physics, Particle physics, 010308 nuclear & particles physics, Glueball, Branching fraction, Electron–positron annihilation, 0103 physical sciences, 010306 general physics, 01 natural sciences
Abstract

We report the first search for the J(PC) = 0(--) glueball in Upsilon(1S) and Upsilon(2S) decays with data samples of (102 +/- 2) x 10(6) and (158 +/- 4) x 10(6) events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90% credibility level 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 chi(c1) are measured to be B(Upsilon(1S) -> chi(c1) + anything) = (1.90 +/- 0.43(stat) +/- 0.14(syst) x 10(-4) with an improved precision over prior measurements and B Upsilon(2S) -> chi(c1) + anything) = (2.24 +/- 0.44(stat) +/- 0.20(syst) x 10(-4) for the first time.

Published
2017
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30. First observation of the decay τ−→ϕK−ντ

Author

V. Aulchenko, T. Lesiak, M. Starič, J. B. Singh, A. Drutskoy, Y. Iwasaki, I. Bizjak, V. Sidorov, T. Matsumoto, D. Liventsev, R. Seidl, R. Mizuk, P. Kapusta, T. Tsukamoto, A. Bozek, J. Haba, T. Iijima, Y. J. Kwon, S. Korpar, K. Abe, M. E. Sevior, Y. Miyazaki, O. Tajima, O. Schneider, H. Aihara, T. Aushev, I. Nakamura, A. M. Bakich, T. Ohshima, S. Fratina, T. E. Browder, Rakesh Kumar, H. Miyata, R. Itoh, H. Kawai, L. S. Peak, E. Nakano, M. Nakao, L. E. Piilonen, C.-H. Wu, Kazuhiko Hara, Bruce Yabsley, T. Schietinger, T. Hokuue, A. Bondar, Y. B. Hsiung, B. Shwartz, R. Kulasiri, H. Ozaki, Y. Nagasaka, S. Villa, Phillip Urquijo, S. Okuno, A. Chen, G. Varner, H. Stoeck, K. Senyo, S. Uno, Y. Usov, K. Ueno, I. Bedny, K. Arinstein, K. Hayasaka, A. Kuzmin, S. Y. Suzuki, H. Hayashii, Gobinda Majumder, S. Ogawa, A. Poluektov, G. Leder, X. C. Tian, H. R. Khan, D. Epifanov, D. Heffernan, H. Miyake, A. Somov, M. Danilov, S. McOnie, K. F. Chen, W. Mitaroff, O. Nitoh, A. Zupanc, P. Krokovny, Masayoshi Y. Tanaka, H. Ha, W. T. Chen, S. Stanič, T. Gershon, H. Shibuya, S. Bahinipati, M. Bračko, F. Mandl, N. Tamura, Toshisuke Kawasaki, V. Zhilich, H. Palka, A. Yamaguchi, Y. J. Kim, S. W. Lin, E. L. Barberio, S. Uehara, H. Park, H. Kichimi, A. Matyja, K. Inami, Ichiro Adachi, T. Uglov, Y. Choi, G. N. Taylor, M. Hazumi, R. Chistov, James Mueller, S. Nishida, N. Soni, Y. Teramoto, Y. Yamashita, E. Won, S. U. Kataoka, S. Eidelman, N. Gabyshev, D. Anipko, W. S. Hou, Long Zhang, Y. Onuki, M. Barbero, Young-Il Choi, G. Gokhroo, P. Križan, A. J. Schwartz, Y. Sakai, A. Ishikawa, Y. Hoshi, C. W. Park, S. Hou, J. H. Kang, and J. Dalseno

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Hadron, Symbol (formal), Belle experiment, Lepton
Abstract

We present the first observation of τ lepton decays to hadronic final states with a ϕ -meson. This analysis is based on 401 fb −1 of data accumulated at the Belle experiment. The branching fraction obtained is B ( τ − → ϕ K − ν τ ) = ( 4.05 ± 0.25 ± 0.26 ) × 10 −5 .

Published
2006
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31. Measurement of γγ→pp¯ production at Belle

Author

S. Nishida, Simon Blyth, F. Mand, J. H. Kang, H. Palka, L. E. Piilonen, V.N. Zhilich, T. Schietinger, W. A. Mitaroff, R. Kulasiri, J. Dalseno, G. Leder, H. Nakazawa, G. Gokhroo, R. Chistov, H. J. Kim, P. Krokovny, M. Iwasaki, Kazuo Abe, B. D. Yabsley, W. S. Hou, Masashi Hazumi, A. Go, E. Nakano, M. Starič, A. Ishikawa, A. Bay, Y. Hoshi, V. M. Aulchenko, Q. L. Xie, T. Aushev, Long Zhang, J. Haba, Y. Asano, P. Kapusta, S. Okuno, Osamu Tajima, F. Takasaki, A. Yamaguchi, Timothy Gershon, Jasvinder A. Singh, S. W. Lin, T. Uglov, K. Tamai, A. Matyja, A. Bondar, M. E. Sevior, M. Dash, T. Sumiyoshi, K. Hayasaka, K. Senyo, Andrej Gorišek, W. Ostrowicz, M. Danilov, C. C. Kuo, T. Kawasaki, S. Stanič, S. Uno, O. Nitoh, K. Inami, H. Kawai, S. Fratina, Gobinda Majumder, Y. Teramoto, S. Y. Suzuki, T. Tsukamoto, D. Liventsev, Akira Sugiyama, Hiroyuki Sagawa, A. Somov, K. Ueno, N. Tamura, H. Park, A. Bozek, I. Bizjak, T. Matsumoto, Yasushi Nagasaka, G. S. Varner, Hiroaki Aihara, Anton Poluektov, R. Itoh, J. Ying, Yuji Enari, Noriaki K. Sato, Rainer Stamen, R. Mizuk, Byung Gu Cheon, H. Kichimi, H. Shibuya, S. Ogawa, W. T. Chen, M. Watanabe, U. Bitenc, M. C. Chang, Zhenyu Zhang, H. Hayashii, T. Lesiak, Y. Yamashita, P. Chang, Y. J. Kwon, D. Zürcher, J. MacNaughton, A. Drutskoy, B. Shwartz, O. Schneider, S. M. Kim, A. Chuvikov, X. C. Tian, G. N. Taylor, D. Žontar, C. C. Wang, M. Nakao, Heyoung Yang, T. Hokuue, C. H. Wang, H. R. Khan, L. S. Peak, M. Yamauchi, Y. Sakai, S. R. Hou, A. Chen, R. Pestotnik, I. Bedny, J. S. Kang, S. Eidelman, N. Soni, Takehiko Mori, G. R. Moloney, Y. Choi, A.S. Kuzmin, S. Cole, S. L. Olsen, I. Adachi, S. Villa, H. Miyake, Toru Iijima, S. Uehara, S. Bahinipati, Suneel Kumar, M. Bračko, A. Imoto, A. M. Bakich, Z. Natkaniec, T. Ohshima, and N. Gabyshev

Subjects
Physics, Nuclear and High Energy Physics, Angular range, 010308 nuclear & particles physics, Branching fraction, 01 natural sciences, law.invention, Nuclear physics, Angular distribution, KEKB, law, 0103 physical sciences, Center of mass, 010306 general physics, Collider, Positron annihilation
Abstract

A high precision study of the process γγ→pp has been performed using a data sample of 89 fb-1 collected with the Belle detector at the KEKB e+e- collider. The cross section of pp production has been measured at two-photon center-of-mass (c.m.) energies between 2.025 and 4.0 GeV and in the c.m. angular range of |cosθ*

Published
2005
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32. Measurement of |Vub| near the endpoint of the electron momentum spectrum from semileptonic B-meson decays

Author

A. Limosani, K. Abe, I. Adachi, H. Aihara, Y. Asano, T. Aushev, S. Bahinipati, A.M. Bakich, E. Barberio, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T.E. Browder, Y. Chao, A. Chen, K.-F. Chen, W.T. Chen, B.G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, T. Hara, N.C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J.H. Kang, J.S. Kang, N. Katayama, H. Kawai, T. Kawasaki, H.R. Khan, H. Kichimi, H.J. Kim, H.O. Kim, S.K. Kim, S.M. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, S. Kumar, C.C. Kuo, Y.-J. Kwon, J.S. Lange, G. Leder, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, Y. Mikami, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, H. Palka, C.W. Park, H. Park, N. Parslow, R. Pestotnik, L.E. Piilonen, F.J. Ronga, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, C. Schwanda, R. Seuster, M.E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, A. Somov, R. Stamen, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S.Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X.C. Tian, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, P. Urquijo, G. Varner, K.E. Varvell, S. Villa, C.C. Wang, C.H. Wang, M.-Z. Wang, Q.L. Xie, B.D. Yabsley, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, J. Ying, J. Zhang, L.M. Zhang, Z.P. Zhang, and D. Žontar

Subjects
Physics, Nuclear physics, Momentum, Nuclear and High Energy Physics, Particle physics, Cabibbo–Kobayashi–Maskawa matrix, Branching fraction, Electron–positron annihilation, B meson, Center of mass, Electron, Resonance (particle physics)
Abstract

Reference EPFL-ARTICLE-154483doi:10.1016/j.physletb.2005.06.011View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12

Published
2005
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33. Branching fraction, polarization and CP-violating asymmetries in B0→D*+D*− decays

Author

H. Miyake, M. Hazumi, K. Abe, H. Aihara, Y. Asano, V. Aulchenko, T. Aushev, T. Aziz, S. Bahinipati, A.M. Bakich, V. Balagura, Y. Ban, S. Banerjee, A. Bay, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T.E. Browder, Y. Chao, A. Chen, K.-F. Chen, B.G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y.K. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, L.Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, J. Haba, K. Hara, T. Hara, N.C. Hastings, K. Hayasaka, H. Hayashii, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J.H. Kang, J.S. Kang, P. Kapusta, S.U. Kataoka, N. Katayama, H. Kawai, T. Kawasaki, H.R. Khan, H. Kichimi, H.J. Kim, J.H. Kim, S.K. Kim, S.M. Kim, K. Kinoshita, P. Koppenburg, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, C.C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, S.E. Lee, T. Lesiak, J. Li, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, W. Mitaroff, K. Miyabayashi, H. Miyata, R. Mizuk, D. Mohapatra, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, H. Park, N. Parslow, L.S. Peak, R. Pestotnik, L.E. Piilonen, M. Rozanska, H. Sagawa, Y. Sakai, N. Sato, T. Schietinger, O. Schneider, P. Schönmeier, J. Schümann, C. Schwanda, A.J. Schwartz, K. Senyo, R. Seuster, M.E. Sevior, H. Shibuya, J.B. Singh, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Suzuki, S.Y. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, Y. Teramoto, X.C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, S. Uno, Y. Ushiroda, G. Varner, K.E. Varvell, S. Villa, C.C. Wang, C.H. Wang, M.-Z. Wang, M. Watanabe, Y. Watanabe, A. Yamaguchi, H. Yamamoto, T. Yamanaka, Y. Yamashita, M. Yamauchi, J. Ying, Y. Yusa, J. Zhang, L.M. Zhang, Z.P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Branching fraction, Electron–positron annihilation, Astrophysics::Cosmology and Extragalactic Astrophysics, Polarization (waves), Nuclear physics, KEKB, CP violation, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract

We present measurements of the branching fraction, the polarization parameters and CP-violating asymmetries in B0→D*+D *- decays using a 140 fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. We obtain B(B0→D*+D*-)=[0. 81±0.08(stat)±0.11(syst)]×10-3, R⊥=0.19±0. 08(stat)±0.01(syst), R0=0.57±0.08(stat)±0.02(syst), S=-0.75±0.56(stat)±0.12(syst) and A=-0.26±0.26(stat) ±0.06(syst). Consistency with Standard Model expectations is also discussed.

Published
2005
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34. Study of →Dππ decays

Author

A Satpathy, K Abe, R Abe, T Abe, I Adachi, H Aihara, M Akatsu, Y Asano, T Aso, T Aushev, A.M Bakich, Y Ban, A Bay, I Bedny, P.K Behera, A Bondar, A Bozek, M Bračko, T.E Browder, B.C.K Casey, P Chang, Y Chao, K.-F Chen, B.G Cheon, R Chistov, S.-K Choi, Y Choi, M Danilov, L.Y Dong, S Eidelman, V Eiges, C Fukunaga, N Gabyshev, A Garmash, T Gershon, B Golob, J Haba, T Hara, N.C Hastings, H Hayashii, M Hazumi, I Higuchi, L Hinz, T Hokuue, W.-S Hou, H.-C Huang, T Igaki, Y Igarashi, T Iijima, K Inami, A Ishikawa, R Itoh, H Iwasaki, Y Iwasaki, H.K Jang, J.H Kang, P Kapusta, S.U Kataoka, N Katayama, H Kawai, Y Kawakami, N Kawamura, T Kawasaki, H Kichimi, D.W Kim, H.J Kim, Hyunwoo Kim, S.K Kim, K Kinoshita, S Kobayashi, P Krokovny, R Kulasiri, S Kumar, A Kuzmin, Y.-J Kwon, S.H Lee, J Li, D Liventsev, R.-S Lu, J MacNaughton, G Majumder, F Mandl, S Matsumoto, T Matsumoto, W Mitaroff, K Miyabayashi, H Miyake, H Miyata, T Mori, T Nagamine, Y Nagasaka, T Nakadaira, E Nakano, M Nakao, H Nakazawa, J.W Nam, Z Natkaniec, S Nishida, O Nitoh, S Noguchi, S Ogawa, T Ohshima, T Okabe, S Okuno, S.L Olsen, Y Onuki, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, C.W Park, K.S Park, J.-P Perroud, M Peters, L.E Piilonen, K Rybicki, H Sagawa, S Saitoh, Y Sakai, M Satapathy, O Schneider, S Schrenk, C Schwanda, S Semenov, K Senyo, R Seuster, H Shibuya, V Sidorov, J.B Singh, N Soni, S Stanič, M Starič, A Sugi, K Sumisawa, T Sumiyoshi, S Suzuki, S.Y Suzuki, S.K Swain, T Takahashi, F Takasaki, K Tamai, N Tamura, J Tanaka, M Tanaka, G.N Taylor, Y Teramoto, T Tomura, K Trabelsi, T Tsuboyama, T Tsukamoto, S Uehara, K Ueno, S Uno, G Varner, C.H Wang, J.G Wang, M.-Z Wang, E Won, B.D Yabsley, Y Yamada, A Yamaguchi, Y Yamashita, M Yamauchi, H Yanai, Y Yuan, C.C Zhang, Z.P Zhang, and V Zhilich

Subjects
Nuclear physics, Hadronic decay, Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Annihilation, Branching fraction, Pi, Omega
Abstract

We report on a study of $\bar{B^{0}} \to D^{(*) 0} \pi^+ \pi^-$ decays using 29.1 fb$^{-1}$ of $e^{+}e^{-}$ annihilation data recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB storage ring. Making no assumptions about the intermediate mechanism, the branching fractions for $\bar{B}^0 \to D^0 \pi^+ \pi^-$ and $\bar{B}^0 \to D^{* 0} \pi^+ \pi^-$ are determined to be $(8.0 \pm 0.6 \pm 1.5) \times 10^{-4} $ and $ (6.2 \pm 1.2 \pm 1.8) \times 10^{-4}$ respectively. An analysis of $\bar{B^{0}} \to D^{0} \pi^+ \pi^-$ candidates yields to the first observation of the color-suppressed hadronic decay $\bar{B}^0 \to D^0 \rho^0$ with the branching fraction $(2.9 \pm 1.0 \pm 0.4) \times 10^{-4}$. We measure the ratio of branching fractions ${\mathcal B}(\bar{B^0} \to D^0 \rho^0) / {\mathcal B}(\bar{B^0} \to D^0 \omega)$ = 1.6 $\pm$ 0.8.

Published
2003
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35. Measurement of χ2 production in two-photon collisions

Author

K. Abe, R. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A.M. Bakich, Y. Ban, E. Banas, A. Bay, P.K. Behera, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, B.C.K. Casey, P. Chang, Y. Chao, B.G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, M. Danilov, L.Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, R. Guo, F. Handa, T. Hara, Y. Harada, H. Hayashii, M. Hazumi, E.M. Heenan, I. Higuchi, T. Hojo, T. Hokuue, Y. Hoshi, K. Hoshina, S.R. Hou, W.-S. Hou, H.-C. Huang, T. Igaki, Y. Igarashi, K. Inami, A. Ishikawa, R. Itoh, M. Iwamoto, H. Iwasaki, Y. Iwasaki, H.K. Jang, J. Kaneko, J.H. Kang, J.S. Kang, P. Kapusta, S.U. Kataoka, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D.W. Kim, Heejong Kim, H.J. Kim, H.O. Kim, Hyunwoo Kim, S.K. Kim, T.H. Kim, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, G. Leder, S.H. Lee, J. Li, D. Liventsev, R.-S. Lu, J. MacNaughton, G. Majumder, F. Mandl, S. Matsumoto, T. Matsumoto, K. Miyabayashi, H. Miyake, H. Miyata, G.R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, J.W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, F. Ohno, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C.W. Park, H. Park, K.S. Park, L.S. Peak, J.-P. Perroud, M. Peters, L.E. Piilonen, N. Root, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M.E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J.B. Singh, S. Stanič, M. Starič, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S.K. Swain, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G.N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, S.N. Tovey, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, S.E. Vahsen, G. Varner, K.E. Varvell, C.C. Wang, C.H. Wang, J.G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B.D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Yashima, Y. Yuan, Y. Yusa, J. Zhang, Z.P. Zhang, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Branching fraction, Product (mathematics), High Energy Physics::Experiment, Production (computer science), High Energy Physics - Experiment
Abstract

The production of the \chi_{c2} charmonium state in two-photon collisions has been measured with the Belle detector at the KEKB e^+e^- collider. A clear signal for \chi_{c2} --> \gamma J/\psi, J/\psi --> l^+l^- is observed in a 32.6fb^{-1} data sample accumulated at center-of-mass energies near 10.6GeV, and the product of its two-photon decay width and branching fraction is determined to be \Gamma_{\gamma\gamma}(\chi_{c2})B(\chi_{c2} --> \gamma J/\psi) B(J/\psi --> l^+l^-)= 13.5 +/- 1.3(stat.) +/- 1.1(syst.)eV., Comment: 16 pages, 5 figures, to be submitted to Phys. Lett. B

Published
2002
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36. Measurement of (→Dℓ) and determination of |V

Author

Hiroyuki Sagawa, G. Leder, D. W. Kim, Y. Watanabe, H. Kichimi, K. Tamai, M. E. Sevior, T. Tsuboyama, Masashi Hazumi, Shaji Kumar, J. L. Rodriguez, H. Miyake, M. Yamauchi, A. Murakami, Y. Zheng, S. Matsumoto, M. Satapathy, N. Kawamura, R. Abe, M. Rozanska, H. Palka, L. E. Piilonen, K. S. Park, L. S. Peak, Y. Ushiroda, R. Guo, S. Uehara, Shih-Chieh Hsu, M. Tanaka, I. Higuchi, J. Haba, J. W. Nam, S. Behari, S. Yanaka, A. Garmash, Hirokazu Ishino, T. Iijima, D. J. Jackson, S. Noguchi, Byoung Sup Ahn, D. Liventsev, H. K. Jang, R. Kulasiri, T. Aushev, T. Hojo, T. Nakadaira, N. Katayama, I. Adachi, S. Y. Suzuki, H. J. Kim, J. P. Perroud, Y. Sakai, S. R. Hou, H. Kawai, B. C. K. Casey, Yasushi Nagasaka, E.J. Prebys, S. N. Tovey, S. K. Swain, J. Zhang, R. Itoh, R. Chistov, F. Fang, K. Sumisawa, Kevin Varvell, D. Žontar, A. Bondar, S. Korpar, V.N. Zhilich, M. Takita, Masashi Yokoyama, Y. Ban, Tsukasa Aso, Ascelin Gordon, H. Aihara, E. M. Heenan, Y. Chao, B. Shwartz, Y. Iwasaki, Chikara Fukunaga, J. B. Singh, Y. Tanaka, S. K. Choi, A. Kuzmin, S. Semenov, Y. J. Kwon, Y. Igarashi, Hiroshi Sakamoto, K. Miyabayashi, S. Ogawa, Ho Kim, Kyo Yoshida, Hirokazu Ikeda, J. G. Wang, Takahiko Matsubara, T. Sumiyoshi, S. E. Vahsen, T. Tomura, L. Y. Dong, C. W. Park, E. Won, N. Tamura, T. J. Gershon, T. Hokuue, S. K. Kim, J. Yashima, K. Senyo, K. Ueno, T. Kawasaki, S. Stanič, Makoto Tomoto, N.I. Root, Heejong Kim, Kazunori Hanagaki, K. Neichi, Y. Mikami, Hitoshi Yamamoto, M. Nakao, K. Trabelsi, J. S. Kang, P. Chang, T. Takahashi, V. M. Aulchenko, H. Fujii, O. Nitoh, J. Tanaka, Masaki Fukushima, Shigeki Mori, Kazuo Abe, H. Ozaki, Y. Asano, P. Kapusta, S. Okuno, Y. Yusa, J. MacNaughton, W. S. Hou, F. Handa, M. D. Peters, T. Abe, Y. Choi, M. Yamaga, Takuya Higuchi, T. Hara, S. H. Lee, A. Ishikawa, Y. Teramoto, A. M. Bakich, Bruce Yabsley, Elzbieta Banas, T. Okabe, N. C. Hastings, Y. Yamashita, F. Takasaki, Z. Natkaniec, T. Ohshima, H. Konishi, T. Nagamine, S. Nishida, H. C. Huang, P. Križan, T. Nozaki, S. Schrenk, W. Ostrowicz, E. Nakano, C. H. Wang, N. Gabyshev, You-Jin Yuan, A. Yamaguchi, Hyunwoo Kim, C. C. Zhang, H. Shibuya, V. Eiges, Rong-Shyang Lu, J. H. Kang, J. Ryuko, T. E. Browder, Hiroyuki Iwasaki, T. Tsukamoto, A. Sugiyama, C.W. Everton, Byung Gu Cheon, K. Hara, K. Hoshina, T. Mori, S. Uno, S. Eidelman, P. Pakhlov, A. Satpathy, S. L. Olsen, H. Park, A. Bozek, T. Matsumoto, M. Z. Wang, K. Kinoshita, A. Drutskoy, P. Krokovny, Y. Nagashima, G. N. Taylor, J. S. Lange, H. Hayashii, K. Inami, Changwon Park, G. R. Moloney, Y. Unno, P. Jalocha, H. W. Zhao, H. Hamasaki, Yasuhiko Yamada, H. Miyata, Prafulla Kumar Behera, Y. Hoshi, T.H. Kim, C. C. Wang, and M. Akatsu

Subjects
Physics, Nuclear and High Energy Physics, Muon, KEKB, Branching fraction, Cabibbo–Kobayashi–Maskawa matrix, Electron–positron annihilation, Analytical chemistry, Form factor (quantum field theory), Resonance, Electron, Atomic physics
Abstract

We present a measurement of the branching fraction for the semileptonic B decay B 0 →D + l − ν , where l− can be either an electron or a muon. We find Γ( B 0 →D + l − ν )=(13.79±0.76±2.51) ns −1 , and the resulting branching fraction B ( B 0 →D + l − ν )=(2.13±0.12±0.39)% , where the first error is statistical and the second systematic. We also investigate the B 0 →D + l − ν form factor and the implications of the result for |Vcb|. From a fit to the differential decay distribution we obtain the rate normalization |Vcb|FD(1)=(4.11±0.44±0.52)×10−2. Using a theoretical calculation of FD(1), the Cabibbo–Kobayashi–Maskawa matrix element |Vcb|=(4.19±0.45±0.53±0.30)×10−2 is obtained, where the last error comes from the theoretical uncertainty of FD(1). The results are based on a data sample of 10.2fb−1 recorded at the ϒ(4S) resonance with the Belle detector at the KEKB e+e− collider.

Published
2002
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37. Determination of |V| using the semileptonic decay →De

Author

K. Abe, R. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A.M. Bakich, Y. Ban, E. Banas, S. Behari, P.K. Behera, A. Bondar, A. Bozek, T.E. Browder, B.C.K. Casey, P. Chang, Y. Chao, B.G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, L.Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, C.W. Everton, F. Fang, H. Fujii, C. Fukunaga, M. Fukushima, N. Gabyshev, A. Garmash, T. Gershon, A. Gordon, R. Guo, J. Haba, H. Hamasaki, K. Hanagaki, F. Handa, K. Hara, T. Hara, N.C. Hastings, H. Hayashii, M. Hazumi, E.M. Heenan, I. Higuchi, T. Higuchi, T. Hojo, T. Hokuue, Y. Hoshi, K. Hoshina, S.R. Hou, W.-S. Hou, S.-C. Hsu, H.-C. Huang, Y. Igarashi, T. Iijima, H. Ikeda, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, Y. Iwasaki, D.J. Jackson, P. Jalocha, H.K. Jang, J.H. Kang, J.S. Kang, P. Kapusta, N. Katayama, H. Kawai, N. Kawamura, T. Kawasaki, H. Kichimi, D.W. Kim, Heejong Kim, H.J. Kim, H.O. Kim, Hyunwoo Kim, S.K. Kim, T.H. Kim, K. Kinoshita, H. Konishi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y.-J. Kwon, J.S. Lange, G. Leder, S.H. Lee, D. Liventsev, R.-S. Lu, J. MacNaughton, T. Matsubara, S. Matsumoto, T. Matsumoto, Y. Mikami, K. Miyabayashi, H. Miyake, H. Miyata, G.R. Moloney, S. Mori, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, Y. Nagashima, T. Nakadaira, E. Nakano, M. Nakao, J.W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S.L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C.S. Park, C.W. Park, H. Park, K.S. Park, L.S. Peak, J.-P. Perroud, M. Peters, L.E. Piilonen, E. Prebys, J.L. Rodriguez, N. Root, M. Rozanska, J. Ryuko, H. Sagawa, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, S. Schrenk, S. Semenov, K. Senyo, M.E. Sevior, H. Shibuya, B. Shwartz, J.B. Singh, S. Stanič, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S.Y. Suzuki, S.K. Swain, T. Takahashi, F. Takasaki, M. Takita, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, Y. Tanaka, G.N. Taylor, Y. Teramoto, M. Tomoto, T. Tomura, S.N. Tovey, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, S.E. Vahsen, K.E. Varvell, C.C. Wang, C.H. Wang, J.G. Wang, M.-Z. Wang, Y. Watanabe, E. Won, B.D. Yabsley, Y. Yamada, M. Yamaga, A. Yamaguchi, H. Yamamoto, Y. Yamashita, M. Yamauchi, S. Yanaka, J. Yashima, M. Yokoyama, K. Yoshida, Y. Yuan, Y. Yusa, C.C. Zhang, J. Zhang, H.W. Zhao, Y. Zheng, V. Zhilich, and D. Žontar

Subjects
Nuclear physics, Physics, Semileptonic decay, Nuclear and High Energy Physics, KEKB, Branching fraction, Electron–positron annihilation, Form factor (quantum field theory), Value (computer science), Resonance, Storage ring
Abstract

We present a measurement of the Cabibbo–Kobayashi–Maskawa (CKM) matrix element |Vcb| using a 10.2 fb−1 data sample recorded at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric e+e− storage ring. By extrapolating the differential decay width of the B 0 →D ∗+ e − ν decay to the kinematic limit at which the D ∗+ is at rest with respect to the B 0 , we extract the product of |Vcb| with the normalization of the decay form factor F(1), |Vcb|F(1)=(3.54±0.19±0.18)×10−2, where the first error is statistical and the second is systematic. A value of |Vcb|=(3.88±0.21±0.20±0.19)×10−2 is obtained using a theoretical calculation of F(1), where the third error is due to the theoretical uncertainty in the value of F(1). The branching fraction B ( B 0 →D ∗+ e − ν ) is measured to be (4.59±0.23±0.40)×10−2.

Published
2002
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38. Measurement of the branching fraction for B→η′K and search for B→η′π+

Author

K Abe, R Abe, I Adachi, B.S Ahn, H Aihara, M Akatsu, Y Asano, T Aso, V Aulchenko, A.M Bakich, E Banas, S Behari, P.K Behera, D Beiline, A Bondar, A Bozek, T.E Browder, B.C.K Casey, P Chang, Y Chao, B.G Cheon, R Chistov, S.-K Choi, Y Choi, L.Y Dong, J Dragic, S Eidelman, Y Enari, F Fang, H Fujii, C Fukunaga, M Fukushima, N Gabyshev, A Garmash, T Gershon, A Gordon, K Gotow, R Guo, J Haba, H Hamasaki, K Hara, T Hara, N.C Hastings, H Hayashii, M Hazumi, E.M Heenan, I Higuchi, T Higuchi, H Hirano, T Hojo, Y Hoshi, K Hoshina, S.R Hou, W.-S Hou, S.-C Hsu, H.-C Huang, Y Igarashi, T Iijima, H Ikeda, K Inami, A Ishikawa, H Ishino, R Itoh, G Iwai, H Iwasaki, Y Iwasaki, D.J Jackson, P Jalocha, H.K Jang, J Kaneko, J.H Kang, J.S Kang, N Katayama, H Kawai, N Kawamura, T Kawasaki, H Kichimi, D.W Kim, Heejong Kim, H.J Kim, Hyunwoo Kim, S.K Kim, T.H Kim, K Kinoshita, S Kobayashi, H Konishi, P Krokovny, R Kulasiri, S Kumar, A Kuzmin, Y.-J Kwon, J.S Lange, G Leder, S.H Lee, D Liventsev, R.-S Lu, T Matsubara, S Matsumoto, T Matsumoto, J MacNaughton, Y Mikami, K Miyabayashi, H Miyake, H Miyata, G.R Moloney, S Mori, T Mori, A Murakami, T Nagamine, Y Nagasaka, Y Nagashima, T Nakadaira, E Nakano, M Nakao, J.W Nam, S Narita, Z Natkaniec, K Neichi, S Nishida, O Nitoh, S Noguchi, T Nozaki, S Ogawa, T Ohshima, T Okabe, S Okuno, H Ozaki, P Pakhlov, H Palka, C.S Park, C.W Park, H Park, L.S Peak, M Peters, L.E Piilonen, E Prebys, J.L Rodriguez, N Root, M Rozanska, K Rybicki, H Sagawa, Y Sakai, H Sakamoto, M Satapathy, A Satpathy, S Semenov, K Senyo, M.E Sevior, H Shibuya, B Shwartz, S Stanič, A Sugi, A Sugiyama, K Sumisawa, T Sumiyoshi, K Suzuki, S Suzuki, S.Y Suzuki, S.K Swain, T Takahashi, M Takita, K Tamai, N Tamura, J Tanaka, M Tanaka, Y Tanaka, Y Teramoto, M Tomoto, T Tomura, S.N Tovey, K Trabelsi, T Tsuboyama, T Tsukamoto, S Uehara, K Ueno, Y Unno, S Uno, Y Ushiroda, K.E Varvell, C.C Wang, C.H Wang, J.G Wang, M.-Z Wang, Y Watanabe, E Won, B.D Yabsley, Y Yamada, M Yamaga, A Yamaguchi, Y Yamashita, M Yamauchi, S Yanaka, J Yashima, K Yoshida, Y Yusa, H Yuta, C.C Zhang, J Zhang, H.W Zhao, Y Zheng, V Zhilich, and D Žontar

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, Meson, Branching fraction, Pi, High Energy Physics::Experiment, Nuclear Experiment, Confidence interval
Abstract

We report measurements for two-body charmless B decays with an eta' meson in the final state. Using 11.1X10^6 BBbar pairs collected with the Belle detector, we find BF(B^+ ->eta'K^+)=(79^+12_-11 +-9)x10^-6 and BF(B^0 -> eta'K^0)=(55^+19_-16 +-8)x10^-6, where the first and second errors are statistical and systematic, respectively. No signal is observed in the mode B^+ -> eta' pi^+, and we set a 90% confidence level upper limit of BF(B^+-> eta'pi^+) eta'K^+- decays is investigated and a limit at 90% confidence level of -0.20

Published
2001
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39. A measurement of the branching fraction for the inclusive B→Xγ decays with the Belle detector

Author

K. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, G. Alimonti, K. Aoki, K. Asai, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A.M. Bakich, E. Banas, W. Bartel, S. Behari, P.K. Behera, D. Beiline, A. Bondar, A. Bozek, T.E. Browder, B.C.K. Casey, P. Chang, Y. Chao, B.G. Cheon, S.-K. Choi, Y. Choi, Y. Doi, J. Dragic, A. Drutskoy, S. Eidelman, Y. Enari, R. Enomoto, F. Fang, H. Fujii, C. Fukunaga, M. Fukushima, A. Garmash, A. Gordon, K. Gotow, H. Guler, R. Guo, J. Haba, H. Hamasaki, K. Hanagaki, F. Handa, K. Hara, T. Hara, T. Haruyama, N.C. Hastings, K. Hayashi, H. Hayashii, M. Hazumi, E.M. Heenan, Y. Higasino, I. Higuchi, T. Higuchi, H. Hirano, T. Hojo, Y. Hoshi, W.-S. Hou, S.-C. Hsu, H.-C. Huang, S. Ichizawa, Y. Igarashi, T. Iijima, H. Ikeda, K. Ikeda, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, G. Iwai, H. Iwasaki, Y. Iwasaki, D.J. Jackson, P. Jalocha, H.K. Jang, M. Jones, R. Kagan, H. Kakuno, J. Kaneko, J.H. Kang, J.S. Kang, P. Kapusta, N. Katayama, H. Kawai, N. Kawamura, T. Kawasaki, H. Kichimi, D.W. Kim, Heejong Kim, H.J. Kim, Hyunwoo Kim, S.K. Kim, K. Kinoshita, K. Korotushenko, P. Krokovny, R. Kulasiri, S. Kumar, T. Kuniya, E. Kurihara, A. Kuzmin, Y.-J. Kwon, J.S. Lange, M.H. Lee, S.H. Lee, H.B. Li, D. Liventsev, R.-S. Lu, A. Manabe, T. Matsubara, S. Matsui, S. Matsumoto, T. Matsumoto, Y. Mikami, K. Misono, K. Miyabayashi, H. Miyake, H. Miyata, L.C. Moffitt, G.R. Moloney, G.F. Moorhead, S. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, Y. Nagashima, T. Nakadaira, E. Nakano, M. Nakao, J.W. Nam, S. Narita, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, Y. Ohshima, T. Okabe, T. Okazaki, S. Okuno, S.L. Olsen, W. Ostrowicz, H. Ozaki, H. Palka, C.S. Park, C.W. Park, H. Park, L.S. Peak, M. Peters, L.E. Piilonen, E. Prebys, J.L. Rodriguez, N. Root, M. Rozanska, K. Rybicki, J. Ryuko, H. Sagawa, Y. Sakai, H. Sakamoto, M. Satapathy, A. Satpathy, S. Schrenk, S. Semenov, K. Senyo, M.E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J.B. Singh, S. Stanič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S.Y. Suzuki, S.K. Swain, H. Tajima, T. Takahashi, F. Takasaki, M. Takita, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, Y. Tanaka, G.N. Taylor, Y. Teramoto, M. Tomoto, T. Tomura, S.N. Tovey, K. Trabelsi, T. Tsuboyama, Y. Tsujita, T. Tsukamoto, S. Uehara, K. Ueno, N. Ujiie, Y. Unno, S. Uno, Y. Ushiroda, Y. Usov, S.E. Vahsen, G. Varner, K.E. Varvell, C.C. Wang, C.H. Wang, M.-Z. Wang, T.J. Wang, Y. Watanabe, E. Won, B.D. Yabsley, Y. Yamada, M. Yamaga, A. Yamaguchi, H. Yamamoto, H. Yamaoka, Y. Yamaoka, Y. Yamashita, M. Yamauchi, S. Yanaka, M. Yokoyama, K. Yoshida, Y. Yusa, H. Yuta, C.C. Zhang, J. Zhang, Y. Zheng, V. Zhilich, and D. Žontar

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, KEKB, Branching fraction, Detector, Radiative transfer, Resonance, B meson, Storage ring, High Energy Physics - Experiment
Abstract

We have measured the branching fraction of the inclusive radiative B meson decay B --> X(s) gamma to be Br(B->X(s)gamma)=(3.36 +/- 0.53(stat) +/- 0.42(sys) +0.50-0.54(th)) x 10^{-4}. The result is based on a sample of 6.07 x 10^6 BBbar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e^+e^- storage ring., Comment: 14 pages, 6 Postsript figures, uses elsart.cls

Published
2001
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40. Measurements of Branching Fractions forB→KπandB→ππDecays

Author

S.-W. Lin, P. Chang, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, E. Barberio, I. Bedny, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, A. Go, B. Golob, H. Ha, J. Haba, T. Hara, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, P. Kapusta, S. U. Kataoka, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y.-J. Kwon, M. J. Lee, T. Lesiak, D. Liventsev, J. MacNaughton, F. Mandl, T. Matsumoto, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, G. R. Moloney, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, J. Wicht, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, C. C. Zhang, Z. P. Zhang, and A. Zupanc

Subjects
Nuclear physics, Physics, Pair production, KEKB, Branching fraction, Pi, Analytical chemistry, General Physics and Astronomy, Branching (polymer chemistry)
Abstract

We report measurements of branching fractions for B -> K pi and B ->pi pi decays based on a data sample of 449x10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We also measure the ratios of partial widths for B -> K pi decays, namely R-c equivalent to 2 Gamma(B+-> K+pi(0))/Gamma(B+-> K-0 pi(+))=1.08 +/- 0.06 +/- 0.08 and R-n equivalent to Gamma(B-0 -> K+pi(-))/2 Gamma(B-0 -> K-0 pi(0))=1.08 +/- 0.08 +/- 0.08, where the first and the second errors are statistical and systematic, respectively. These ratios are sensitive to enhanced electroweak penguin contributions from new physics; the new measurements are, however, consistent with standard model expectations.

Published
2007
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41. Study ofB¯0→D0π+π−decays

Author

A. Kuzmin, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, T. Gershon, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y.-J. Kwon, S. E. Lee, T. Lesiak, S.-W. Lin, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, A. Sokolov, A. Somov, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, C.-H. Wu, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, Nuclear and High Energy Physics, Crystallography, KEKB, Meson, Branching fraction, Pi, Dalitz plot, B meson, Belle experiment
Abstract

We report the results of a study of neutral B meson decays to the D^0 pi+ pi- final state, where the D^0 is fully reconstructed. The results are obtained from an event sample containing 388 million BB-bar -meson pairs collected in the Belle experiment at the KEKB e^+e^- collider. The total branching fraction of the three-body decay B(bar{B}^0 -> D^0 pi^+ pi^-) =(8.4+-0.4(stat.)+-0.8(syst.)) 10^{-4} has been measured. The intermediate resonant structure of these three-body decays has been studied. From a Dalitz plot analysis we have obtained the product of the branching fractions for D^{*+}_2 and D^{*+}_0 production: B(bar{B}^0-> D^{*+}_2 pi^-) B(D_2^{*+}-> D^{0}\pi^+)= (2.15+-0.17(stat.)+-0.29(syst.)+-0.12(mod.))10^{-4}, and B(bar{B}^0-> D^{*+}_0 pi^-) B(D_0^{*+}-> D^{0} pi^+)= (0.60+-0.13(stat.)}+-0.15(syst.)+-0.22(mod.))10^{-4}. This is the first observation of the bar{B}^0-> D^{*+}_0 pi^- decay. The bar{B^0} -> D^0 rho^0 and D^0f_2 branching fractions are measured to be: B(bar{B}^0->D^0 rho^0)=(3.19+-0.20(stat.)+-0.24(syst.)+-0.38(mod.)) 10^{-4},and B(bar{B}^0-> D^0 f_2)=(1.20+-0.18(stat.)+-0.21(syst.)+-0.32(mod.)) 10^{-4}.

Published
2007
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42. Measurements of exclusiveBs0decays at theΥ(5S)resonance

Author

Y. Sakai, J. Wicht, M. Starič, S. Suzuki, T. E. Browder, Y. B. Hsiung, A. Zupanc, E. Nakano, Gobinda Majumder, N. Satoyama, N. Soni, Masashi Hazumi, Y. Onuki, S. Uno, H. Hayashii, M. Shapkin, S. L. Olsen, Y. Miyazaki, M. Danilov, C. C. Kuo, M. Yamauchi, D. Liventsev, A. Yamaguchi, Y. J. Kim, H. Ozaki, J. Dragic, W. S. Hou, Y. Iwasaki, Y. J. Kwon, B. G. Cheon, S. W. Lin, K. Kinoshita, E. L. Barberio, O. Schneider, S. Nishida, I. Bizjak, G. S. Varner, V.N. Zhilich, G. N. Taylor, A. Bondar, D. Anipko, I. Adachi, S. Korpar, Antonio Limosani, W. A. Mitaroff, Y. Choi, R. Seidl, Motoki Iwasaki, Y. Ushiroda, A. Vinokurova, R. Itoh, M. Dash, T. Hara, J. B. Singh, A. Drutskoy, K. Miyabayashi, Ho Kim, S. Villa, R. Pestotnik, P. Krokovny, Yu. V. Usov, B. Golob, U. Bitenc, H. Miyata, Y. Hoshi, M. C. Chang, A. Kuzmin, S. Eidelman, P. Pakhlov, Rakesh Kumar, S. Ogawa, J. Schümann, A. J. Schwartz, H. Stoeck, A. Somov, K. Inami, Y. Unno, I. Bedny, K. Sumisawa, K. Senyo, K. F. Chen, H. Aihara, K. Ueno, T. Kawasaki, S. Uehara, K. Ikado, H. Ha, T. Sumiyoshi, I. Tikhomirov, A. Chen, G. R. Moloney, M. J. Lee, L. E. Piilonen, T. Schietinger, G. Pakhlova, M. Bračko, R. Kulasiri, M. Nakao, S. McOnie, J. MacNaughton, H. J. Kim, R. Chistov, S. Fratina, T. Matsumoto, Samo Stanič, Hirokazu Ishino, H. Kawai, A. M. Bakich, Z. Natkaniec, T. Ohshima, S. Blyth, N. Gabyshev, A. Ishikawa, F. Takasaki, P. Križan, J. H. Kang, J. Dalseno, C. H. Wang, H. Shibuya, Y. Yamashita, Y. Watanabe, M. Tanaka, X. C. Tian, J. Haba, D. Heffernan, Y. Chao, Vladimir Zhulanov, K. Tamai, M. E. Sevior, Kazuo Abe, P. Kapusta, S. Okuno, Y. Teramoto, Bruce Yabsley, W. T. Chen, and P. Chang

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, KEKB, Meson production, Meson, Branching fraction, Electron–positron annihilation
Abstract

Several exclusive Bs0 decays are studied using a 1.86fb-1 data sample collected at the Υ(5S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. In the Bs0→Ds-π+ decay mode we find 10 Bs0 candidates and measure the corresponding branching fraction. Combining the Bs0→Ds(*)-π+, Bs0→Ds(*)-ρ+, Bs0→J/ψ, and Bs0→J/ψη decay modes, a significant Bs0 signal is observed. The ratio σ(e+e-→Bs*Bs*)/σ(e+e-→Bs(*) Bs(*))=(93-9+7±1)% is obtained at the Υ(5S) energy, indicating that Bs0 meson production proceeds predominantly through the creation of Bs*Bs* pairs. The Bs0 and Bs* meson masses are measured to be M(Bs0)=(5370±1±3)MeV/c2 and M(Bs*)= (5418±1±3)MeV/c2. Upper limits on the Bs0→γγ, Bs0→ γ, Bs0→K+K-, and Bs0→Ds(*)+Ds(*)- branching fractions are also reported. © 2007 The American Physical Society.

Published
2007
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43. Evidence forCPViolation inB0→D+D−Decays

Author

S. Fratina, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, A. Go, B. Golob, A. Gorišek, H. Ha, J. Haba, K. Hara, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, S. Nishida, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, S. Villa, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Particle physics, Particle decay, Pair production, KEKB, Branching fraction, media_common.quotation_subject, General Physics and Astronomy, CP violation, Value (computer science), Asymmetry, Standard Model, media_common
Abstract

We report measurements of the branching fraction and CP violation parameters in B(0)-->D+ D- decays. The results are based on a data sample that contains 535 x 10(6) BB pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain [1.97+/-0.20(stat) +/- 0.20(syst)] x 10(-4) for the branching fraction of B0-->D+D-. The measured values of the CP violation parameters are S=-1.13+/-0.37+/-0.09, A=0.91+/-0.23+/-0.06, where the first error is statistical and the second is systematic. We find evidence of CP violation in B0-->D+D- at the 4.1sigma confidence level. While the value of S is consistent with expectations from other measurements, the value of the parameter A favors large direct CP violation at the 3.2sigma confidence level, in contradiction to standard model expectations.

Published
2007
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44. Measurement of charmlessBdecays toηK*andηρ

Author

E. Nakano, M. Tanaka, U. Bitenc, A. Yamaguchi, Jasvinder A. Singh, S. W. Lin, X. C. Tian, Toru Iijima, T. Tsukamoto, Zhenyu Zhang, G. Gokhroo, K. Senyo, D. Heffernan, S. Y. Suzuki, M. J. Lee, A. Drutskoy, M. Bračko, S. Uehara, K. Ikado, G. Leder, H. Ha, N. Katayama, Y. Iwasaki, Y. J. Kwon, K. Tamai, M. E. Sevior, S. Nishida, E. Won, O. Schneider, K. Ueno, A. Imoto, A. M. Bakich, I. Adachi, N. Satoyama, Z. Natkaniec, T. Ohshima, D. Liventsev, Masashi Hazumi, H. Stoeck, Y. Watanabe, Rakesh Kumar, S. Villa, D. Anipko, S. Eidelman, H. Kichimi, S. Fratina, K. S. Park, N. Gabyshev, T. Tsuboyama, L. E. Piilonen, T. Lesiak, G. Pakhlova, G. S. Varner, A. Ishikawa, N. Soni, T. Hokuue, R. Kulasiri, A. Bay, Phillip Urquijo, A. Zupanc, S. Cole, S. E. Lee, W. S. Hou, R. Itoh, Timothy Gershon, R. Chistov, M. Starič, O. Nitoh, Yu. V. Usov, T. Matsumoto, T. Uglov, Y. Sakai, K. Inami, Samo Stanič, H. Miyake, Hiroaki Aihara, Andrey Sokolov, M. Iwasaki, A. Somov, C. C. Kuo, M. Z. Wang, K. Kinoshita, J. H. Kang, R. Mizuk, Y. Choi, P. Pakhlov, A. Garmash, G. N. Taylor, J. Haba, J. Dalseno, H. Park, A. Bozek, B. Golob, A. Bondar, K. Belous, S. Blyth, V.N. Zhilich, S. Ogawa, Young-Il Choi, B. G. Cheon, A. Matyja, I. Tikhomirov, A. Chen, M. Shapkin, Y. J. Kim, H. Ozaki, M. Nakao, S. McOnie, J. MacNaughton, R. Pestotnik, C. C. Zhang, H. Shibuya, Y. Yamashita, C. H. Wang, Y. Chao, H. R. Khan, Kazuo Abe, T. Hara, P. Kapusta, S. Okuno, T. Aushev, Y. Teramoto, J. Schümann, H. Kaji, W. T. Chen, P. Chang, Q. L. Xie, Y. Onuki, E. L. Barberio, Hirokazu Ishino, H. Miyata, Y. Hoshi, and K. Hayasaka

Subjects
Physics, Nuclear and High Energy Physics, Crystallography, KEKB, Branching fraction, Electron–positron annihilation, CP violation, Atomic physics
Abstract

We report measurements of branching fractions and CP asymmetries for B{yields}{eta}K* and B{yields}{eta}{rho} decays. These results are obtained from a 414 fb{sup -1} data sample collected at the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. We measure the following branching fractions: B(B{sup 0}{yields}{eta}K*{sup 0})=(15.2{+-}1.2{+-}1.0)x10{sup -6} and B(B{sup +}{yields}{eta}K*{sup +})=(19.3{sub -1.9}{sup +2.0}{+-}1.5)x10{sup -6}, where the first error is statistical and the second systematic. We also find a 2.7{sigma} excess in the B{sup +}{yields}{eta}{rho}{sup +} mode and measure B(B{sup +}{yields}{eta}{rho}{sup +})=(4.1{sub -1.3}{sup +1.4}{+-}0.4)x10{sup -6}

Published
2007
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45. Observation ofBDecays to Two Kaons

Author

S.-W. Lin, P. Chang, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, J. Dragic, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, A. Imoto, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, R. Kulasiri, C. C. Kuo, Y.-J. Kwon, J. S. Lange, J. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, T. Mori, I. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, K. Senyo, M. Shapkin, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, High Energy Physics - Experiment (hep-ex), Crystallography, Particle decay, Pair production, KEKB, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, FOS: Physical sciences, General Physics and Astronomy, Atomic physics, High Energy Physics - Experiment
Abstract

Using 449 million BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider, we observe clear signals for B^+-> \bar{K}^0 K^+ and B^0-> \bar{K}^0 K^0 decays with 5.3 sigma and 6.0 sigma significance, respectively. We measure the branching fractions Br(B^+-> \bar{K}^0 K^+ = (1.22^{+0.32+0.13}_{-0.28-0.16})x10^{-6} and Br(B^0-> \bar{K}^0 K^0) = (0.87^{+0.25}_{-0.20} +- 0.09)x10^{-6}, and partial-rate asymmetries A_{CP}(B^+-> \bar{K}^0 K^+) = 0.13^{+0.23}_{-0.24}+- 0.02 and A_{CP}(B^0-> \bar{K}^0 K^0) = -0.58^{+0.73}_{-0.66}+- 0.04. From a simultaneous fit we also obtain Br(B^+-> K^0��^+)= (22.8^{+0.8}_{-0.7} +- 1.3)x 10^{-6} and A_{CP}(B^+-> K^0 ��^+) = 0.03 +- 0.03 +- 0.01. The first and second error in the branching fractions and the partial-rate asymmetries are statistical and systematic, respectively. No signal is observed for B^0-> K^+ K^- decays, and for this branching fraction we set an upper limit of 4.1x10^{-7} at the 90% confidence level., 6 pages, 3 figures

Published
2007
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46. Improved measurement ofB¯0→Ds−D+and search forB¯0→Ds+Ds−at Belle

Author

A. Zupanc, K. Abe, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, E. Barberio, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Go, B. Golob, H. Ha, J. Haba, T. Hara, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Ikado, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, H. Kaji, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, Y.-J. Kwon, M. J. Lee, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, Y. Ushiroda, Y. Usov, G. Varner, S. Villa, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, and V. Zhulanov

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Web of science, Branching fraction, Electron–positron annihilation, Particle identification
Abstract

Reference EPFL-ARTICLE-154432doi:10.1103/PhysRevD.75.091102View record in Web of Science Record created on 2010-11-05, modified on 2017-12-10

Published
2007
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47. Observation of the decayΥ(4S)→Υ(1S)π+π−

Author

A. Sokolov, M. Shapkin, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, E. Barberio, M. Barbero, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, M. Bračko, T. E. Browder, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, T. Gershon, A. Go, G. Gokhroo, B. Golob, H. Ha, J. Haba, T. Hara, Y. Hasegawa, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, Y. J. Kim, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, A. Kuzmin, Y.-J. Kwon, T. Lesiak, A. Limosani, S.-W. Lin, D. Liventsev, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, T. Nagamine, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, H. Palka, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, M. E. Sevior, H. Shibuya, B. Shwartz, A. Somov, N. Soni, S. Stanič, H. Stoeck, T. Sumiyoshi, S. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, Y. Watanabe, J. Wiechczynski, E. Won, C.-H. Wu, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 01 natural sciences, Particle identification, Crystallography, Pion, KEKB, Product (mathematics), 0103 physical sciences, 010306 general physics
Abstract

We study transitions between {upsilon} states with the emission of charged pions using 477 fb{sup -1} of data collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. The measured product branching fraction B({upsilon}(4S){yields}{upsilon}(1S){pi}{sup +}{pi}{sup -})xB({upsilon}(1S){yields}{mu}{sup +}{mu}{sup -})= =(4.42{+-}0.81(stat){+-}0.56(sys))x10{sup -6}. When the PDG value for B({upsilon}(1S){yields}{mu}{sup +}{mu}{sup -}) is used, this corresponds to B({upsilon}(4S){yields}{upsilon}(1S){pi}{sup +}{pi}{sup -})=(1.78{+-}0.33(stat){+-}0.23(sys) = )x10{sup -4} and a partial decay width {gamma}({upsilon}(4S){yields}{upsilon}(1S){pi}{sup +}{pi}{sup -})=(3.65{+-}0.67(stat){+-}0.6 = 5(sys)) keV.

Published
2007
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48. Observation of the DecayB0→J/ψη

Author

M.-C. Chang, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, S.-K. Choi, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, H. Ha, J. Haba, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, H. Kaji, J. H. Kang, S. U. Kataoka, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S.-W. Lin, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, T. Nagamine, I. Nakamura, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, J. Schümann, A. J. Schwartz, R. Seidl, K. Senyo, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M.-Z. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, C. C. Zhang, L. M. Zhang, Z. P. Zhang, and A. Zupanc

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, General Physics and Astronomy, Resonance, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, law.invention, Particle decay, KEKB, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider
Abstract

We report the first observation of B(0)-->J/psieta decay. These results are obtained from a data sample that contains 449 x10(6) BB[over] pairs accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We observe a signal with a significance of 8.1 sigma and obtain a branching fraction of (9.5+/-1.7(stat)+/-0.8(syst)) x 10(-6).

Published
2007
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49. Moments of the electron energy spectrum and partial branching fraction ofB→Xceνdecays at the Belle detector

Author

P. Urquijo, E. Barberio, K. Abe, I. Adachi, H. Aihara, D. Anipko, V. Aulchenko, T. Aushev, M. Barbero, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, N. C. Hastings, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, S. Hou, W.-S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, J. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, G. Majumder, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, I. Nakamura, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, R. Wedd, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, Branching fraction, Electron–positron annihilation, Electron, Threshold energy, Nuclear physics, KEKB, Positron, High Energy Physics::Experiment, B meson, Nuclear Experiment
Abstract

We report a measurement of the inclusive electron energy spectrum for charmed semileptonic decays of B mesons in a 140fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. We determine the first four moments of the electron energy spectrum for threshold values of the electron energy between 0.4 and 2.0 GeV. In addition, we provide values of the partial branching fraction (zeroth moment) for the same electron threshold energies, and independent measurements of the B+ and B0 partial branching fractions at 0.4 GeV and 0.6 GeV electron threshold energies. We measure the independent B+ and B0 partial branching fractions with electron threshold energies of 0.4 GeV to be ΔB(B+→Xceν)=(10. 79±0.25(stat.)±0.27(sys.))% and ΔB(B0→Xceν)=(10. 08±0.30(stat.)±0.22(sys.))%. Full correlations between all measurements are evaluated. © 2007 The American Physical Society.

Published
2007
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50. Measurement of InclusiveDs,D0, andJ/ψRates and Determination of theBs(*)B¯s(*)Production Fraction inbb¯Events at theΥ(5S)Resonance

Author

A. Drutskoy, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, V. Aulchenko, T. Aushev, S. Banerjee, E. Barberio, M. Barbero, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, J. Dragic, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, T. Gershon, A. Go, G. Gokhroo, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Higuchi, Y. Hoshi, S. Hou, W.-S. Hou, Y. B. Hsiung, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, A. Kuzmin, Y.-J. Kwon, J. S. Lange, G. Leder, J. Lee, M. J. Lee, T. Lesiak, J. Li, A. Limosani, S.-W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, A. Matyja, S. McOnie, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, A. Sokolov, A. Somov, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. Y. Suzuki, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, J. Wiechczynski, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Y. Yusa, L. M. Zhang, Z. P. Zhang, V. Zhilich, and A. Zupanc

Subjects
Physics, Particle physics, KEKB, Pair production, Meson, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Quarkonium, Dimensionless quantity
Abstract

The inclusive production of Ds, D0, and J/ψ mesons is studied using a 1.86fb-1 data sample collected on the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The number of bb events in this Υ(5S) data sample is determined. We measure the branching fractions B(Υ(5S)→DsX)/2=(23.6±1.2±3.6)%, B(Υ(5S)→D0X)/2=(53.8±2.0±3.4)%, and B(Υ(5S)→J/ ψX)/2=(1.030±0.080±0.067)%. From the Ds and D0 inclusive branching fractions the ratio fs=(18.0±1.3±3.2)% of Bs(*)Bs(*) to the total bb quark pair production at the Υ(5S) energy is obtained in a model-dependent way. © 2007 The American Physical Society.

Published
2007
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