Author: "C. Kiesling" / Topic: physics - Searchworks@Jio Institute Digital Library Search Results

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1. Unbinned deep learning jet substructure measurement in high Q2 ep collisions at HERA

Author: V. Andreev, M. Arratia, A. Baghdasaryan, A. Baty, K. Begzsuren, A. Bolz, V. Boudry, G. Brandt, D. Britzger, A. Buniatyan, L. Bystritskaya, A.J. Campbell, K.B. Cantun Avila, K. Cerny, V. Chekelian, Z. Chen, J.G. Contreras, J. Cvach, J.B. Dainton, K. Daum, A. Deshpande, C. Diaconu, A. Drees, G. Eckerlin, S. Egli, E. Elsen, L. Favart, A. Fedotov, J. Feltesse, M. Fleischer, A. Fomenko, C. Gal, J. Gayler, L. Goerlich, N. Gogitidze, M. Gouzevitch, C. Grab, T. Greenshaw, G. Grindhammer, D. Haidt, R.C.W. Henderson, J. Hessler, J. Hladký, D. Hoffmann, R. Horisberger, T. Hreus, F. Huber, P.M. Jacobs, M. Jacquet, T. Janssen, A.W. Jung, J. Katzy, C. Kiesling, M. Klein, C. Kleinwort, H.T. Klest, R. Kogler, P. Kostka, J. Kretzschmar, D. Krücker, K. Krüger, M.P.J. Landon, W. Lange, P. Laycock, S.H. Lee, S. Levonian, W. Li, J. Lin, K. Lipka, B. List, J. List, B. Lobodzinski, O.R. Long, E. Malinovski, H.-U. Martyn, S.J. Maxfield, A. Mehta, A.B. Meyer, J. Meyer, S. Mikocki, V.M. Mikuni, M.M. Mondal, K. Müller, B. Nachman, Th. Naumann, P.R. Newman, C. Niebuhr, G. Nowak, J.E. Olsson, D. Ozerov, S. Park, C. Pascaud, G.D. Patel, E. Perez, A. Petrukhin, I. Picuric, D. Pitzl, R. Polifka, S. Preins, V. Radescu, N. Raicevic, T. Ravdandorj, P. Reimer, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, M. Rotaru, D.P.C. Sankey, M. Sauter, E. Sauvan, S. Schmitt, B.A. Schmookler, G. Schnell, L. Schoeffel, A. Schöning, F. Sefkow, S. Shushkevich, Y. Soloviev, P. Sopicki, D. South, A. Specka, M. Steder, B. Stella, U. Straumann, C. Sun, T. Sykora, P.D. Thompson, F. Torales Acosta, D. Traynor, B. Tseepeldorj, Z. Tu, G. Tustin, A. Valkárová, C. Vallée, P. Van Mechelen, D. Wegener, E. Wünsch, J. Žáček, J. Zhang, Z. Zhang, R. Žlebčík, H. Zohrabyan, and F. Zomer
Subjects: Physics, QC1-999
Abstract: The radiation pattern within high energy quark- and gluon-initiated jets (jet substructure) is used extensively as a precision probe of the strong force as well as an environment for optimizing event generators with numerous applications in high energy particle and nuclear physics. Looking at electron-proton collisions is of particular interest as many of the complications present at hadron colliders are absent. A detailed study of modern jet substructure observables, jet angularities, in electron-proton collisions is presented using data recorded using the H1 detector at HERA. The measurement is unbinned and multi-dimensional, using machine learning to correct for detector effects. All of the available reconstructed object information of the respective jets is interpreted by a graph neural network, achieving superior precision on a selected set of jet angularities. Training these networks was enabled by the use of a large number of GPUs in the Perlmutter supercomputer at Berkeley Lab. The particle jets are reconstructed in the laboratory frame, using the kT jet clustering algorithm. Results are reported at high transverse momentum transfer Q2>150GeV2, and inelasticity 0.2
Published: 2023
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2. Measurement of D0–D‾0 mixing and search for CP violation in D0→K+K−,π+π− decays with the full Belle data set

Author: M. Starič, A. Abdesselam, I. Adachi, H. Aihara, K. Arinstein, D.M. Asner, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, S. Bahinipati, A.M. Bakich, V. Bansal, J. Biswal, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T.E. Browder, D. Červenkov, V. Chekelian, A. Chen, B.G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Doležal, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J.E. Fast, T. Ferber, B.G. Fulsom, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, R. Glattauer, Y.M. Goh, P. Goldenzweig, B. Golob, J. Grygier, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, X.H. He, W.-S. Hou, C.-L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, I. Jaegle, D. Joffe, T. Julius, K.H. Kang, T. Kawasaki, T. Keck, C. Kiesling, D.Y. Kim, J.B. Kim, J.H. Kim, M.J. Kim, S.H. Kim, Y.J. Kim, K. Kinoshita, B.R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kumita, A. Kuzmin, Y.-J. Kwon, J.S. Lange, I.S. Lee, P. Lewis, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, M. Masuda, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G.B. Mohanty, A. Moll, H.K. Moon, R. Mussa, M. Nakao, T. Nanut, Z. Natkaniec, N.K. Nisar, S. Nishida, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, B. Pal, C.W. Park, H. Park, T.K. Pedlar, L. Pesántez, R. Pestotnik, M. Petrič, L.E. Piilonen, E. Ribežl, M. Ritter, A. Rostomyan, Y. Sakai, S. Sandilya, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, A.J. Schwartz, K. Senyo, V. Shebalin, C.P. Shen, T.-A. Shibata, J.-G. Shiu, B. Shwartz, F. Simon, Y.-S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Steder, M. Sumihama, U. Tamponi, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M.N. Wagner, C.H. Wang, M.-Z. Wang, P. Wang, X.L. Wang, M. Watanabe, Y. Watanabe, K.M. Williams, E. Won, S. Yashchenko, Y. Yook, C.Z. Yuan, Z.P. Zhang, V. Zhilich, V. Zhulanov, M. Ziegler, and A. Zupanc
Subjects: Charm mesons, Mixing, CP violation, Physics, QC1-999
Abstract: We report an improved measurement of D0–D‾0 mixing and a search for CP violation in D0 decays to CP-even final states K+K− and π+π−. The measurement is based on the final Belle data sample of 976 fb−1. The results are yCP=(1.11±0.22±0.09)% and AΓ=(−0.03±0.20±0.07)%, where the first uncertainty is statistical and the second is systematic.
Published: 2016
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3. A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB

Author: Hiroyuki Nakayama, Frank Simon, I. Jaegle, Y. Funakoshi, Y. Ohnishi, Yusuke Suetsugu, H. Windel, C. Kiesling, S. Vahsen, Naomi van der Kolk, Marco Szalay, M. Gabriel, Michael Hedges, P. M. Lewis, Naoko Iida, and Riccardo de Sangro
Subjects: Accelerator Physics (physics.acc-ph), Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Phase (waves), FOS: Physical sciences, 02 engineering and technology, QC770-798, Scintillator, Astrophysics, 01 natural sciences, law.invention, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Silicon photomultiplier, Optics, law, Nuclear and particle physics. Atomic energy. Radioactivity, 0103 physical sciences, 010306 general physics, Collider, Engineering (miscellaneous), Physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), 021001 nanoscience & nanotechnology, Betatron, Synchrotron, QB460-466, Physics::Accelerator Physics, Physics - Accelerator Physics, 0210 nano-technology, business, Beam (structure)
Abstract: We report on measurements of beam backgrounds during the first commissioning phase of the SuperKEKB collider in 2016, performed with the plastic scintillator and silicon photomultiplier-based CLAWS detector system. The sub-nanosecond time resolution and single particle detection capability of the sensors allow bunch-by-bunch measurements, enable CLAWS to perform a novel time resolved analysis of beam backgrounds, and make the system uniquely suited for the study of injection backgrounds. We present measurements of various aspects of regular beam background and injection backgrounds which include time structure and decay behavior of injection backgrounds, hit-energy spectra and overall background rates. These measurements show that the elevated background rates following an injection generally last for several milliseconds, with the majority of the background particles typically observed within the first 500 us. The injection backgrounds exhibit pronounced patterns in time, connected to betatron and synchrotron oscillations in the accelerator rings. The frequencies of these patterns are determined from detector data., 19 pages, 12 figures, published in EPJ C
Published: 2021

4. Measurement of branching fractions and search for CP violation in D 0 → π + π − η, D 0 → K + K − η, and D 0 → ϕη at Belle

Author: S. Sandilya, S. Jia, G.V. Russo, A. Kuzmin, A. Korobov, S. Al Said, A. Sangal, E.-J. Jang, W. S. Hou, M. Starič, M. Merola, G. Bonvicini, A. Vinokurova, S. E. Vahsen, K. Senyo, E. Graziani, P. Krokovny, Y. Choi, V. Popov, Yongsun Kim, K. Lalwani, V.N. Zhilich, M. Takizawa, K. H. Kang, K. Cho, S. Uno, C. Schwanda, Y. Iwasaki, John Yelton, G. Schnell, Z. Doležal, G. De Nardo, Y. J. Kwon, W. B. Yan, D. Epifanov, Z. Natkaniec, M. Iwasaki, S. Das, G. De Pietro, L. Nayak, V. Babu, M. Z. Wang, K. Kinoshita, K. Miyabayashi, N. Rout, T. Kuhr, E. Won, V. Gaur, T. K. Pedlar, Antonio Budano, B. G. Cheon, G. B. Mohanty, B. Golob, C. H. Li, T. Gu, L. K. Li, M. Nayak, Y. Yusa, Dipak Kumar Sahoo, F. Tenchini, F. Di Capua, Luka Santelj, S. K. Choi, Seongbae Yang, R. Ayad, T. Ferber, T. Uglov, A. K. Giri, Seema Bahinipati, Prafulla Kumar Behera, Y. Sakai, Shih-Chang Lee, P. Pakhlov, A. Natochii, T. Sumiyoshi, K. Inami, K. Lieret, A. Passeri, K.-H. Kim, J. Biswal, M. Bračko, H. E. Cho, N. K. Nisar, M. Masuda, K. Uno, Felix Metzner, M. Uchida, C. H. Kim, T. Sanuki, Tomoyuki Konno, D. Y. Kim, S.-H. Park, A. Bozek, J. Bennett, E. Prencipe, H. Atmacan, K. K. Joo, L. E. Piilonen, G. S. Varner, P. Oskin, J. G. Shiu, T. V. Dong, S.-J. Cho, A. Chen, N. Dash, C. P. Shen, E. Solovieva, L. Li Gioi, Iki Adachi, Seok Kim, B. G. Fulsom, M. Shapkin, A. J. Schwartz, K. Chilikin, K. Nishimura, M. Laurenza, A. Bobrov, R. Mizuk, M. Campajola, V. Savinov, S. Nishida, S. Cunliffe, M. Sumihama, X. L. Wang, M. C. Chang, V. Chekelian, H. Ono, R. Dhamija, R. Van Tonder, Tagir Aushev, E. Waheed, Samo Korpar, V. Zhukova, C. Sharma, Peter Kodys, W. W. Jacobs, P. L. Wang, V.M. Aulchenko, Y. Unno, Y. Guan, P. Branchini, K. Kumara, G. Karyan, T. Mori, H. Aihara, Z. S. Stottler, S. Watanuki, Z. P. Zhang, G. Pakhlova, H. Ye, M. Niiyama, S. Halder, T. Bilka, T. E. Browder, M. Bessner, C. H. Wang, S. Paul, S. Pardi, B.A. Shwartz, Y. Q. Chen, Bruce Yabsley, Y. Jin, R. Kroeger, P. Goldenzweig, R. Pestotnik, K. Tanida, D. Cinabro, P. Chang, M. Kumar, D. Červenkov, Somnath Choudhury, D. Matvienko, J. Libby, D. M. Asner, J. H. Yin, K. Hayasaka, C. Kiesling, E. Kovalenko, Rocky Bala Garg, Y. Seino, C. Hadjivasiliou, M. T. Prim, D. Liventsev, A. Ishikawa, M. Nakao, P. Križan, Andrey Sokolov, T. Podobnik, Semen Eidelman, Belle, Collaboration, Campajola, M., De Nardo, G., Di Capua, F., Merola, M., Pardi, S., Russo, G., and Et, Al.
Subjects: Physics, Nuclear and High Energy Physics, Charm physic, 010308 nuclear & particles physics, Branching fraction, e, −, e +-e − Experiments, QC770-798, +, 01 natural sciences, Combinatorics, KEKB, CP violation, Nuclear and particle physics. Atomic energy. Radioactivity, 0103 physical sciences, 010306 general physics, Experiments, Charm physics
Abstract: We measure the branching fractions and CP asymmetries for the singly Cabibbo-suppressed decays D0 → π+π−η, D0 → K+K−η, and D0 → ϕη, using 980 fb−1 of data from the Belle experiment at the KEKB e+e− collider. We obtain$$ {\displaystyle \begin{array}{c}\mathcal{B}\left({D}^0\to {\pi}^{+}{\pi}^{-}\eta \right)=\left[1.22\pm 0.02\left(\mathrm{stat}\right)\pm 0.02\left(\mathrm{syst}\right)\pm 0.03\left({\mathcal{B}}_{\mathrm{ref}}\right)\right]\times {10}^{-3},\\ {}\mathcal{B}\left({D}^0\to {K}^{+}{K}^{-}\eta \right)=\left[{1.80}_{-0.06}^{+0.07}\left(\mathrm{stat}\right)\pm 0.04\left(\mathrm{syst}\right)\pm 0.05\left({\mathcal{B}}_{\mathrm{ref}}\right)\right]\times {10}^{-4},\\ {}\mathcal{B}\left({D}^0\to \phi \eta \right)=\left[1.84\pm 0.09\left(\mathrm{stat}\right)\pm 0.06\left(\mathrm{syst}\right)\pm 0.05\left({\mathcal{B}}_{\mathrm{ref}}\right)\right]\times {10}^{-4},\end{array}} $$ B D 0 → π + π − η = 1.22 ± 0.02 stat ± 0.02 syst ± 0.03 B ref × 10 − 3 , B D 0 → K + K − η = 1.80 − 0.06 + 0.07 stat ± 0.04 syst ± 0.05 B ref × 10 − 4 , B D 0 → ϕη = 1.84 ± 0.09 stat ± 0.06 syst ± 0.05 B ref × 10 − 4 , where the third uncertainty ($$ \mathcal{B} $$ B ref) is from the uncertainty in the branching fraction of the reference mode D0 → K−π+η. The color-suppressed decay D0 → ϕη is observed for the first time, with very high significance. The results for the CP asymmetries are$$ {\displaystyle \begin{array}{c}{A}_{CP}\left({D}^0\ {\pi}^{+}{\pi}^{-}\eta \right)=\left[0.9\pm 1.2\left(\mathrm{stat}\right)\pm 0.5\left(\mathrm{syst}\right)\right]\%,\\ {}{A}_{CP}\left({D}^0\to {K}^{+}{K}^{-}\eta \right)=\left[-1.4\pm 3.3\left(\mathrm{stat}\right)\pm 1.1\left(\mathrm{syst}\right)\right]\%,\\ {} ACP\ \left({D}^0\to \phi \eta \right)=\left[-1.9\pm 4.4\left(\mathrm{stat}\right)\pm 0.6\left(\mathrm{syst}\right)\right]\%.\end{array}} $$ A CP D 0 π + π − η = 0.9 ± 1.2 stat ± 0.5 syst % , A CP D 0 → K + K − η = − 1.4 ± 3.3 stat ± 1.1 syst % , ACP D 0 → ϕη = − 1.9 ± 4.4 stat ± 0.6 syst % . The results for D0 → π+π−η are a significant improvement over previous results. The branching fraction and ACP results for D0 → K+K−η, and the ACP result for D0 → ϕη, are the first such measurements. No evidence for CP violation is found in any of these decays.
Published: 2021

5. Measurement of the energy dependence of the e + e − → B B ¯ $$ B\overline{B} $$ , B B ¯ ∗ $$ B{\overline{B}}^{\ast } $$ and B ∗ B ¯ ∗ $$ {B}^{\ast }{\overline{B}}^{\ast } $$ exclusive cross sections

Author: J. G. Shiu, Jochen Dingfelder, W. B. Yan, S. Cunliffe, M. C. Chang, F. Tenchini, T. Sumiyoshi, Iki Adachi, T. Sanuki, S. Jia, Y. B. Li, T. Matsuda, L. E. Piilonen, H. Park, A. Bozek, P. Oskin, B. Golob, P. Lewis, V. Gaur, L. Nayak, V. Babu, Tagir Aushev, Y. Sakai, V. Zhukova, K. Lieret, Y. Iwasaki, M. Nayak, G. Schnell, T. Iijima, J. Biswal, M. Uchida, Y. J. Kwon, Prafulla Kumar Behera, P. Krokovny, Y. Onuki, T. Uglov, A. Sangal, G. B. Mohanty, A.E. Bondar, R. Mussa, A. Ishikawa, T. Ferber, N. Rout, S. Al Said, K. Cho, H. E. Cho, M. Nakao, J. Schueler, E. Won, R. Mizuk, P. Križan, M. Takizawa, M. Röhrken, K. Chilikin, M. Merola, N. Dash, F. Di Capua, T. Kuhr, M. Campajola, V.N. Zhilich, E. Solovieva, D. Epifanov, V.M. Aulchenko, Z. Doležal, T. Pang, S. Patra, A. Kuzmin, E.-J. Jang, G.V. Russo, Tomoyuki Konno, K. Senyo, Yongsun Kim, S. Ogawa, K. Miyabayashi, R. Dhamija, S. Sandilya, T. K. Pedlar, Shih-Chang Lee, S. Das, S. Uno, C. Schwanda, C. Z. Yuan, W. S. Hou, C.-L. Hsu, S.-J. Cho, P. Pakhlov, C. H. Kim, Seongbae Yang, R. Ayad, Seema Bahinipati, S. K. Choi, M. Starič, H. Hayashii, M. Bračko, D. Liventsev, C. P. Shen, G. S. Varner, K. Trabelsi, J. Li, Dipak Kumar Sahoo, Seok Kim, C. Sharma, Peter Kodys, W. W. Jacobs, S.-H. Park, J. Bennett, Luka Santelj, Andrey Sokolov, T. Podobnik, D. Y. Kim, E. Prencipe, R. Itoh, H. Kichimi, K. Nishimura, Felix Metzner, A. Rostomyan, K. Huang, E. Waheed, G. De Nardo, M. T. Hedges, B. G. Fulsom, L. Li Gioi, G. Karyan, A. Korobov, Semen Eidelman, A. Natochii, H. Ono, N. K. Nisar, H. Atmacan, K. Uno, X. P. Xu, M. Z. Wang, K. Kinoshita, Y. Choi, V. Popov, S. Watanuki, M. Masuda, S. Nishida, M. Iwasaki, Z. P. Zhang, B. G. Cheon, A. Garmash, Y. Unno, V. Chekelian, A. Chen, K. Belous, R. Van Tonder, M. Mrvar, P. L. Wang, J. H. Yin, G. Pakhlova, C. Kiesling, A. Bobrov, K. Kumara, V. Savinov, H. Aihara, Y. Usov, Z. S. Stottler, Rocky Bala Garg, Sadaharu Uehara, C. Hadjivasiliou, Samo Korpar, H. Ye, Samo Stanič, U. Tamponi, M. Bessner, C. H. Wang, S. Paul, M. Niiyama, T. Bilka, M. Watanabe, T. E. Browder, D. Červenkov, K. Tanida, D. Matvienko, B.A. Shwartz, Y. Jin, R. Kroeger, P. Goldenzweig, S. Pardi, Bruce Yabsley, R. Pestotnik, D. Cinabro, Somnath Choudhury, J. Libby, D. M. Asner, K. Hayasaka, E. Kovalenko, M. T. Prim, Takeo Kawasaki, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Belle
Subjects: Nuclear and High Energy Physics, Particle physics, Upsilon(10570): electroproduction, Overline, final state: ((n)jet), B: hadronic decay, measured [channel cross section], Hadron, e+-e− Experiments, Quarkonium, BELLE, annihilation [electron positron], QC770-798, electron positron: annihilation, Particle and resonance production, 01 natural sciences, energy dependence, e+-e�� Experiments, KEK-B, KEKB, ((n)jet) [final state], Nuclear and particle physics. Atomic energy. Radioactivity, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, B meson, 010306 general physics, Spectroscopy, hadronic decay [B], Physics, B: pair production, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, e +-e − Experiments, electron positron: colliding beams, Belle experiment, pair production [B], Upsilon(10870): electroproduction, electroproduction [Upsilon(10870)], 10.63-11.02 GeV-cms, electroproduction [Upsilon(10570)], colliding beams [electron positron], High Energy Physics::Experiment, channel cross section: measured, Energy (signal processing), experimental results
Abstract: Journal of high energy physics 06(6), 137 (2021). doi:10.1007/JHEP06(2021)137, We report the first measurement of the exclusive cross sections e$^{+}$e$^{��}$ �� $ B\overline{B} $, e$^{+}$e$^{��}$ �� $ B{\overline{B}}^{\ast } $, and e$^{+}$e$^{��}$ �� $ {B}^{\ast }{\overline{B}}^{\ast } $ in the energy range from 10.63 GeV to 11.02 GeV. The B mesons are fully reconstructed in a large number of hadronic final states and the three channels are identified using a beam-constrained-mass variable. The shapes of the exclusive cross sections show oscillatory behavior with several maxima and minima. The results are obtained using data collected by the Belle experiment at the KEKB asymmetric-energy e$^{+}$e$^{��}$ collider.[graphic not available: see fulltext], Published by SISSA, [Trieste]
Published: 2021
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6. Precise Measurement of the D0 and D+ Lifetimes at Belle II

Author: R. Mussa, F. Pham, H. Svidras, T. Lam, A. Ishikawa, L. E. Piilonen, M. Nakao, P. Križan, K. Yoshihara, Concettina Sfienti, P. Oskin, U. Tamponi, M. Iwasaki, T. Iijima, A. Kuzmin, M. Welsch, T. M. G. Kraetzschmar, E.-J. Jang, B. G. Cheon, S. Ogawa, G. Giakoustidis, H. Ono, L. M. Cremaldi, K. Matsuoka, T. Kuhr, G. L. Pinna Angioni, S. E. Vahsen, I. Ueda, S. Pardi, N. Rad, M. Bračko, A. Gabrielli, Antonio Budano, Y. Iwasaki, Y. J. Kwon, J. F. Strube, S. Kohani, L. Lanceri, S. Uehara, Makoto Tabata, Jakub Kandra, N. Rout, P. Leitl, T. V. Dong, W. Gradl, K. Flood, C. Niebuhr, X. Y. Zhou, S. Sandilya, M. Starič, M. Hernandez Villanueva, Hidekazu Kakuno, S. Y. Suzuki, L. Corona, R. Stroili, M. Remnev, S. Baehr, E. Wang, F. Meier, I. Ripp-Baudot, Shih-Chang Lee, S. Pokharel, R. Itoh, S. Jia, Dipak Kumar Sahoo, D. Bodrov, P. Bambade, Luka Santelj, Bruce Yabsley, T. Matsuda, Enrico Bernieri, S. Uno, H. Junkerkalefeld, L. Aggarwal, Sunil Bansal, Y. Unno, C. Murphy, C. Wessel, M. Niiyama, Rok Pestotnik, D. Biswas, T. Tsuboyama, F. Abudinén, M. Piccolo, Takeo Higuchi, Carlos Marinas, J. M. Roney, J. Libby, D. M. Asner, S. Halder, K. Hayasaka, R. Tiwary, C. Miller, C. H. Kim, F. Di Capua, T. Koga, A. B. Kaliyar, A. Pathak, K. Tanida, G. Dujany, H. G. Moser, T. Bilka, Daniel Greenwald, F. Tenchini, S. Prell, Seema Bahinipati, Andrey Sokolov, T. Uglov, B. Paschen, G. De Pietro, B. Shwartz, Y. Uematsu, M. Takizawa, Yu. Onishchuk, A. Vinokurova, S. Dubey, I. Heredia-De La Cruz, K. Hara, Y. Seino, H. Tanigawa, B. Golob, M. Bertemes, C.-L. Hsu, M. Watanabe, H. Ozaki, T. E. Browder, A. Glazov, O. Hartbrich, J. Schueler, M. T. Prim, Takeo Kawasaki, D. Y. Kim, Dmytro Levit, A. Natochii, J. Baudot, C. H. Li, K. Lieret, K. Inami, V. Zhukova, Y. Onuki, A. Fodor, Kouji Nakamura, S. Bilokin, R. Žlebčík, A. Baur, P. Krokovny, Sw. Banerjee, John Yelton, S. Stefkova, Q. D. Zhou, D. Cinabro, R. Giordano, Shuji Tanaka, E. C. Hill, Hamad Ahmed, Q. Y. Liu, M. Dorigo, E. Kovalenko, K. Unger, P. Pakhlov, Rakesh Kumar, T. Podobnik, A. J. Schwartz, Z. Doležal, G. Inguglia, G. Nazaryan, P. Chang, M. Kumar, I. Domínguez Jiménez, V. Bhardwaj, Z. Liptak, E. Bertholet, I. Adachi, F. Forti, M. Mrvar, J. Serrano, H. Ye, M. Barrett, E. Won, K. H. Kang, K. Cho, N. Molina-Gonzalez, A. Passeri, L. Zani, G. Polat, R. Kowalewski, K. Trabelsi, J. Guilliams, G. Finocchiaro, J. Bennett, A. Sangal, G. Casarosa, C. Praz, T. Gu, M. Z. Wang, K. Kinoshita, Peter Kodys, W. W. Jacobs, M. Bessner, G. S. Varner, A. Gellrich, S. Raiz, Abner Soffer, Elisa Manoni, K. Chirapatpimol, S. Reiter, N. Gabyshev, D. Červenkov, Nils Braun, T. Czank, S. Cunliffe, P. L. M. Podesta-Lerma, B. Spruck, I. M. Peruzzi, R. de Sangro, D. Epifanov, M. Campajola, H. Purwar, A. Selce, E. Solovieva, T. Lueck, A. Bolz, Somnath Choudhury, T. Hara, H. Aihara, K. Lautenbach, A. Panta, M. Merola, J. G. Shiu, Y.-T. Chen, Samo Korpar, Claudia Cecchi, G. de Marino, A. Rostomyan, A. Paladino, M. C. Chang, S. Bussino, V.N. Zhilich, L. B. Rizzuto, Agnese Martini, F. Bianchi, Y. Ushiroda, N. Toutounji, Jürgen Becker, S. Yamada, R. Manfredi, Hitoshi Hirata, Y. Kato, D. Ferlewicz, H. Nakazawa, P. Branchini, S. Bettarini, Yu. V. Usov, W. Sutcliffe, J. H. Yin, B. G. Fulsom, Florian Urs Bernlochner, S. Nishida, G. Karyan, A. Di Canto, Jochen Dingfelder, K. Senyo, H. M. Wakeling, J. Wiechczynski, T. K. Pedlar, K. Uno, Andreas Warburton, C. Kiesling, W. B. Yan, D. A. Sanders, Phillip Urquijo, R. Godang, Ya-Qiu Jin, G. De Nardo, D. Tonelli, R. Mizuk, M. Sumihama, C. H. Chen, Z. Natkaniec, A. Vossen, S. K. Choi, L. K. Li, E. R. Oxford, K. Miyabayashi, S. Duell, R. Peschke, E. Paoloni, K. Nishimura, Frank Simon, Seongbae Yang, N. Taniguchi, C. Hearty, Y. Guan, Prafulla Kumar Behera, M. Destefanis, M. Hoek, Matthias Bauer, R. Cheaib, K. Kumara, S. Spataro, X. P. Xu, E. Prencipe, M. Rozanska, H. Hayashii, Z. S. Stottler, A. K. Giri, R. J. Sobie, D. Matvienko, L. Vitale, N. K. Nisar, H. K. Moon, J. Kumar, S.-H. Park, J. S. Lange, C. Hadjivasiliou, R. Karl, T. D. Kimmel, Stefano Longo, T. Pang, S. Patra, A. Sibidanov, K. Adamczyk, F. Dattola, L. Cao, A. Bobrov, D. Liventsev, F. R. Le Diberder, Yongsun Kim, B. Gobbo, K. Lalwani, P. Goldenzweig, N. Anh Ky, E. Graziani, E. De La Cruz-Burelo, H. E. Cho, C. Schwanda, F. Krinner, E. Torassa, Pere Rados, M. V. Purohit, R. A. Briere, I. Nakamura, K. Chilikin, D. E. Jaffe, T. Humair, P. Ecker, M. Hohmann, E. Waheed, V. Aushev, Tomoyuki Konno, D. Dossett, C. Lyu, S.-J. Cho, A. De Yta-Hernandez, J. A. McKenna, Y. Kim, V. Babu, T. Ferber, S. Kurz, V. Popov, S. Dey, A. Hershenhorn, G. Rizzo, S. Lacaprara, N. Akopov, Soumen Paul, Felix Metzner, B. Scavino, H. Atmacan, G. B. Mohanty, Alberto Aloisio, Y. Yusa, Yuki Sato, M. Laurenza, V. Savinov, S. Bacher, K. Dort, H. Park, A. Bozek, K. Gudkova, Alessandro Gaz, S. H. Robertson, X. L. Wang, V. Chekelian, S. Hazra, R. Van Tonder, and H. Bae
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, law, 0103 physical sciences, General Physics and Astronomy, Resonance, 010306 general physics, Collider, 01 natural sciences, law.invention, Luminosity
Abstract: We report a measurement of the D^{0} and D^{+} lifetimes using D^{0}→K^{-}π^{+} and D^{+}→K^{-}π^{+}π^{+} decays reconstructed in e^{+}e^{-}→cc[over ¯] data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy e^{+}e^{-} collider. The data, collected at center-of-mass energies at or near the ϒ(4S) resonance, correspond to an integrated luminosity of 72 fb^{-1}. The results, τ(D^{0})=410.5±1.1(stat)±0.8(syst) fs and τ(D^{+})=1030.4±4.7(stat)±3.1(syst) fs, are the most precise to date and are consistent with previous determinations.
Published: 2021

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

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

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

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

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

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

10. Erratum to: Measurement of jet production cross sections in deep-inelastic ep scattering at HERA

Author: Karel Cerny, J. E. Olsson, Th. Naumann, Roman Kogler, P. Kostka, E. Gabathuler, Benno List, Katja Krüger, K. Daum, Natasa Raicevic, J. Feltesse, H. U. Martyn, Matthias Klein, Wolfgang Lange, C. Pascaud, Vincent Boudry, J. Žáček, J. Gayler, C. Vallée, A. Lebedev, Jozef Ferencei, A. N. Morozov, F. Huber, K. Begzsuren, I. Tsakov, D. Ozerov, T. Greenshaw, D. Haidt, Paul Newman, Claus Kleinwort, M. Jacquet, E. E. Elsen, A. Baghdasaryan, A. Rostovtsev, U. Straumann, Paul Laycock, V. Dodonov, B. Stella, A. Buniatyan, Peter Robmann, E. Malinovski, Roland Horisberger, Emmanuel Sauvan, Tomas Hreus, A. Valkárová, Emmanuelle Perez, K. B. Cantun Avila, Jean-Arcady Meyer, G. Grindhammer, C. Kiesling, D. P. C. Sankey, R. Roosen, Fabian Zomer, Z. P. Zhang, S. Shushkevich, A. J. Campbell, T. Ravdandorj, C. Niebuhr, E. Wünsch, Monica Dobre, Daniel Britzger, David South, P. E. Reimer, V. Andreev, R. C. W. Henderson, S. Egli, Tomas Sykora, M. Sauter, V. Chekelian, Y. Soloviev, D. Wegener, P. Van Mechelen, E. Rizvi, G. D. Patel, A. V. Fedotov, Hannes Jung, Grzegorz Nowak, Y. Vazdik, Katerina Lipka, A. Grebenyuk, R. Žlebčík, B. Lobodzinski, A. Specka, Voica Radescu, M. P. J. Landon, Alexander Bylinkin, Dirk L. Hoffmann, M. Steder, Christoph Grab, M. Kapichine, Jenny List, Arthur Eugen Bolz, L. Bystritskaya, Marina Rotaru, P. D. Thompson, H. Zohrabyan, S. Mikocki, S. Ghazaryan, Judith Katzy, Dirk Krücker, Laurent Schoeffel, B. Tseepeldorj, V. Brisson, Richard Polifka, H. J. Meyer, A.S. Belousov, P. Sopicki, P. Truöl, J. Cvach, Steffen Schmitt, K. Müller, Stephen Maxfield, N. Gogitidze, V. Spaskov, Daniel Pitzl, Jan Kretzschmar, Ankita Mehta, Cristinel Diaconu, S. Levonian, A. B. Meyer, Maxime Gouzevitch, M. Fleischer, Gerhard Brandt, F. Sefkow, Xavier Janssen, A. Petrukhin, I. Picuric, Guenter Eckerlin, André Schöning, D. Salek, L. Goerlich, R. Plačakytė, J. G. Contreras, A. M. Fomenko, J. Hladkỳ, Laurent Favart, J. B. Dainton, D. Traynor, and H. Pirumov
Subjects: Physics, Nuclear physics, Quantum chromodynamics, Jet (fluid), Physics and Astronomy (miscellaneous), Scattering, HERA, Table (information), Engineering (miscellaneous)
Abstract: The measurement of the jet cross sections by the H1 collaboration had been compared to various predictions including the next-to-next-to-leading order (NNLO) QCD calculations which are corrected in this erratum for an implementation error in one of the components of the NNLO calculations. The jet data and the other predictions remain unchanged. Eight figures, one table and conclusions are adapted accordingly, exhibiting even better agreement between the corrected NNLO predictions and the jet data.
Published: 2021

11. Measurements of partial branching fractions of inclusive B→Xuℓ+νℓ decays with hadronic tagging

Author: M. Uchida, L. K. Li, G. De Nardo, M. T. Hedges, T. Matsuda, T. Pang, S. Uno, R. Itoh, S Choudhury, G. Bonvicini, A. Rostomyan, Zhukova, S. Cunliffe, B. G. Fulsom, D. Ferlewicz, A. Vinokurova, S. Dubey, S. Al Said, D. Matvienko, Y Choi, Pavel Krokovny, Florian Urs Bernlochner, C. Kiesling, M. Bračko, M Merola, K. H. Kang, B. H. Kim, C. Z. Yuan, K. Miyabayashi, Popov, Samo Korpar, Steve K. Choi, S Ogawa, Deepak Kumar Sahoo, J. MacNaughton, T. Kawasaki, R. Mussa, H. B. Jeon, A. Ishikawa, M. Nakao, W. S. Hou, Alexei Kuzmin, GB Mohanty, Yongsun Kim, K. Lalwani, S-H Park, M. Takizawa, S.-J. Cho, U. Tamponi, D Cinabro, K. Trabelsi, S. Jia, E. Prencipe, E. Wang, F. Tenchini, R. Mizuk, K. Chilikin, D. Epifanov, T. Podobnik, T. Sumiyoshi, Martin Ritter, T. Sanuki, Matthias Bauer, S. Paul, C. Schwanda, L. Li Gioi, S. Pardi, C. P. Shen, S. Nishida, J. Schueler, C. MacQueen, A. J. Schwartz, T. K. Pedlar, W. B. Yan, M. Campajola, C. W. Park, E. Won, K. Kumara, K. Tanida, P. Krizan, L. Nayak, A. K. Giri, BG Cheon, G. Schnell, P. Oskin, T. Ferber, Z. Natkaniec, Andrey Sokolov, S. Wehle, R. Ayad, A. Bozek, Z. S. Stottler, K. Cho, S. E. Vahsen, X. P. Xu, T. Iijima, M. Rozanska, G. Varner, H. Atmacan, T. Uglov, M. Masuda, D. Kotchetkov, D. Červenkov, K. Nishimura, C. W. Joo, H. Kichimi, Villanueva, MH[Villanueva, M. Hernandez], A. Sangal, Phillip Urquijo, J. H. Yin, Z. J. Liptak, J. F. Strube, Zhilich, H Aihara, Rahul Kumar, T. Bilka, L. Cao, Semen Eidelman, J. Wiechczynski, M. Watanabe, F. Di Capua, A. Garmash, J. C. Dingfelder, Vorobyev, Y. Sakai, N. K. Nisar, Bhardwaj, Y. Iwasaki, Babu, P. Wang, Sudhanwa Patra, Samo Stanič, K. Lieret, J. S. Lange, I. Adachi, Bruce Yabsley, R. Kroeger, C.-L. Hsu, Y-J Kwon, D. Liventsev, DY Kim, Chekelian, Y. Jin, M. E. Sevior, I. S. Lee, A. Frey, K Kinoshita, P. Goldenzweig, M. Nayak, W. Sutcliffe, C. Sharma, Peter Kodys, W. W. Jacobs, E. Solovieva, Tagir Aushev, Y. Onuki, H. Ono, Leo Piilonen, E.-J. Jang, Zdenek Dolezal, T. Kuhr, Seongbae Yang, A. Vossen, Frank Simon, Y. Unno, H. E. Cho, N. Rout, G. Karyan, TE Browder, K. Belous, M Iwasaki, S. C. Lee, N. Dash, Y. Guan, M. Mrvar, Zhiqing Zhang, Chunjie Wang, P. Chang, P Behera, M. Niiyama, M. C. Chang, E. Waheed, Martin Florian Bessner, J. Libby, D. M. Asner, K. Hayasaka, E. Kovalenko, H Ye, S. Sandilya, Y. Seino, Shoichi Watanuki, M. Starič, K. Senyo, S. Das, Kevin Varvell, J. V. Bennett, T. Mori, Y. Usov, G. Pakhlova, S. H. Kim, J. Li, Mukesh Kumar, T. J. Moon, M. T. Prim, C. H. Li, T. Konno, H. Hayashii, Hyunyong Kim, C. H. Kim, M. Z. Wang, Felix Metzner, A. Chen, K. K. Joo, M. Shapkin, Yang Li, T. V. Dong, M. Röhrken, T. Hara, L. Santelj, Gaur, O. Hartbrich, R. Pestotnik, A. Natochii, K. Inami, A. Korobov, Savinov, Y. Yusa, R. Van Tonder, R. B. Garg, J-G Shiu, K.-H. Kim, J. Biswal, Zhulanov, C. Hadjivasiliou, P. Pakhlov, Philip Lewis, G. Russo, and H. Park
Subjects: Physics, Research program, Higher education, 010308 nuclear & particles physics, business.industry, Atomic energy, media_common.quotation_subject, Library science, 01 natural sciences, Excellence, 0103 physical sciences, media_common.cataloged_instance, European union, 010306 general physics, China, business, National laboratory, Research center, media_common
Abstract: We thank Kerstin Tackmann, Frank Tackmann, Zoltan Ligeti, Ian Stewart, Thomas Mannel, and Keri Voss for useful discussions about the subject matter of this manuscript. L. C., W. S., R. V. T., and F. B. were supported by the DFG Emmy-Noether Grant No. BE 6075/1-1. W. S. was supported by the Alexander von Humboldt Foundation. We thank the KEKB group for the excellent operation of the accelerator, the KEK cryogenics group for the efficient operation of the solenoid, and the KEK computer group and the Pacific Northwest National Laboratory (PNNL) Environmental Molecular Sciences Laboratory (EMSL) computing group for strong computing support, and the National Institute of Informatics and Science Information NETwork 5 (SINET5) for valuable network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan, the Japan Society for the Promotion of Science (JSPS), and the Tau-Lepton Physics Research Center of Nagoya University; the Australian Research Council including Grants No. DP180102629, No. DP170102389, No. DP170102204, No. DP150103061, and No. FT130100303; Austrian Federal Ministry of Education, Science and Research (FWF) and FWF Austrian Science Fund No. P 31361-N36; the National Natural Science Foundation of China under Contracts No. 11435013, No. 11475187, No. 11521505, No. 11575017, No. 11675166, and No. 11705209; Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS), Grant No. QYZDJ-SSW-SLH011; the CAS Center for Excellence in Particle Physics (CCEPP); the Shanghai Pujiang Program under Grant No. 18PJ1401000; the Shanghai Science and Technology Committee (STCSM) under Grant No. 19ZR1403000; the Ministry of Education, Youth and Sports of the Czech Republic under Contract No. LTT17020; Horizon 2020 ERC Advanced Grant No. 884719 and ERC Starting Grant No. 947006 "InterLeptons" (European Union); the Carl Zeiss Foundation, the Deutsche Forschungsgemeinschaft, the Excellence Cluster Universe, and the VolkswagenStiftung; the Department of Atomic Energy (Project Identification No. RTI 4002) and the Department of Science and Technology of India; the Istituto Nazionale di Fisica Nucleare of Italy; National Research Foundation (NRF) of Korea Grants No. 2016R1D1A1B01010135, No. 2016R1D1A1B02012900, No. 2018R1A2B3003643, No. 2018R1A6A1A06024970, No. 2018R1D1A1B07047294, No. 2019K1A3A7A09033840, andNo. 2019R1I1A3A01058933; Radiation Science Research Institute, Foreign Large-size Research Facility Application Supporting project, the Global Science Experimental Data Hub Center of the Korea Institute of Science and Technology Information and KREONET/GLORIAD; the Polish Ministry of Science and Higher Education and the National Science Center; the Ministry of Science and Higher Education of the Russian Federation, Agreement 14.W03.31.0026, and the HSE University Basic Research Program, Moscow; University of Tabuk research Grants No. S-1440-0321, No. S-02561438, and No. S-0280-1439 (Saudi Arabia); the Slovenian Research Agency Grants No. J1-9124 and No. P1-0135; Ikerbasque, Basque Foundation for Science, Spain; the Swiss National Science Foundation; the Ministry of Education and the Ministry of Science and Technology of Taiwan; and the U.S. Department of Energy and the National Science Foundation
Published: 2021

12. First determination of the spin and parity of the charmed-strange baryon Ξc(2970)+

Author: R. Mizuk, K. Chilikin, K. T. Kim, Y Choi, C. Beleño, Y. Kato, D. M. Asner, Pavel Krokovny, D. Dossett, K. Hayasaka, W. Sutcliffe, Zhukova, Y. Seino, J. Libby, D. Epifanov, K. Miyabayashi, D Cinabro, K. Trabelsi, B. Golob, A. Garmash, S. Wehle, A. Sangal, G. Varner, M. Uchida, Y. I. Kim, Leo Piilonen, C. P. Shen, F. Di Capua, H. Miyata, Takeo Kawasaki, A. K. Giri, K. Sumisawa, BG Cheon, T. J. Moon, J. S. H. Lee, N. K. Nisar, Babu, Z. Liptak, M. Niiyama, P Behera, A. Vossen, T. D. Kimmel, M. Masuda, T. K. Pedlar, S. Al Said, J. Biswal, Zhulanov, M. Nayak, P. Wang, H Aihara, L. K. Li, G. Schnell, T. V. Dong, T. Bilka, R. Kroeger, J. Schueler, Seongbae Yang, H. Ono, Saraju P. Mohanty, GB Mohanty, Vorobyev, E. Prencipe, D. Liventsev, TE Browder, P. Chang, U. Tamponi, C.-L. Hsu, K. K. Joo, S-H Park, Yongsun Kim, K. Senyo, C. Schwanda, S. Cunliffe, B. G. Fulsom, S. Jia, D. Matvienko, R. Itoh, X. P. Xu, A. Bozek, Peter Kodys, W. W. Jacobs, T. Matsuda, Zdenek Dolezal, T. Kuhr, M Iwasaki, Yang Li, S. Paul, R. Mussa, T. Ferber, Tao Luo, K. Tanida, S. K. Kim, A. Kuzmin, D. Kotchetkov, S. Uno, S Choudhury, L. Cao, S. C. Lee, M. Takizawa, C. MacQueen, G. Karyan, J. K. Ahn, L. Santelj, G. Bonvicini, Aulchenko, A. Ishikawa, M. Nakao, L. Li Gioi, John Yelton, Gaur, Samo Korpar, A. Vinokurova, S. Dubey, Y. Sakai, H. Kichimi, Rocky Bala Garg, F. Tenchini, O. Hartbrich, Zhiqing Zhang, Chunjie Wang, S. Patra, T. Podobnik, S. Pardi, T. Sumiyoshi, P. Krizan, S Ogawa, E. Wang, M. Campajola, Rakesh Kumar, M Merola, K. H. Kang, J. Wiechczynski, B.A. Shwartz, Y. Unno, Martin Ritter, R. Ayad, K. Cho, Seema Bahinipati, C. Hadjivasiliou, Bruce Yabsley, S. Nishida, G. De Nardo, M. T. Hedges, Y-J Kwon, K. Kumara, Y. Jin, T. Uglov, W-S Hou, Phillip Urquijo, M. E. Sevior, I. S. Lee, Savinov, Zhilich, P. Goldenzweig, M. Sumihama, I. Adachi, N. Dash, T. Mori, E. Solovieva, DY Kim, Semen Eidelman, J. H. Yin, G. Inguglia, K Kinoshita, R. Seidl, C. Kiesling, B. H. Kim, C. Z. Yuan, M. Bračko, Tagir Aushev, M. C. Chang, G. Pakhlova, S. K. Choi, S. Sandilya, Z. Natkaniec, S. E. Vahsen, Y. Iwasaki, S. Uehara, N. Rout, N. Gabyshev, D. Červenkov, M. Z. Wang, Martin Florian Bessner, H Ye, J. Bennett, S. H. Kim, M. Shapkin, H. Hayashii, R. Pestotnik, Dipak Kumar Sahoo, Popov, Kohei Ogawa, A. Chen, A. Natochii, K. Inami, M. T. Prim, T. Nakano, P. Pakhlov, G. Russo, H. Park, R. Van Tonder, B. Bhuyan, and J-G Shiu
Subjects: Quark, Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Parity (physics), 01 natural sciences, Baryon, KEKB, Angular distribution, Condensed Matter::Superconductivity, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics
Abstract: We report results from a study of the spin and parity of $\Xi_{c}(2970)^+$ using a $980~\mathrm{fb^{-1}}$ data sample collected by the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The decay angle distributions in the chain $\Xi_{c}(2970)^+ \to \Xi_c(2645)^{0}\pi^{+} \to \Xi_c^{+}\pi^{-}\pi^{+}$ are analyzed to determine the spin of this charmed-strange baryon. The angular distributions strongly favor the $\Xi_{c}(2970)^+$ spin $J =1/2$ over $3/2$ or $5/2$, under an assumption that the lowest partial wave dominates in the decay. We also measure the ratio of $\Xi_{c}(2970)^+$ decay branching fractions $R={\mathcal{B}[ \Xi_{c}(2970)^+ \to \Xi_c(2645)^{0}\pi^{+} ]} / { \mathcal{B}[ \Xi_{c}(2970)^+ \to \Xi_c^{\prime0}\pi^{+} ]} =1.67 \pm 0.29\mathrm{(stat.)}^{ +0.15}_{ -0.09}\mathrm{(syst.)} \pm 0.25\mathrm{(IS)}$, where the last uncertainty is due to possible isospin-symmetry-breaking effects. This $R$ value favors the spin-parity $J^P=1/2^+$ with the spin of the light-quark degrees of freedom $s_{l}=0$. This is the first determination of the spin and parity of a charmed-strange baryon.
Published: 2021

13. The Belle II vertex detector integration

Author: H. Windel, V. Babu, S. Skambraks, P. Mammini, Ti. Baroncelli, M. Kaleta, C. Koffmane, M. Hensel, G. Batignani, J. Stypula, Prafulla Kumar Behera, V. Chekelian, C. La Licata, C. Wessel, H. Aihara, D. Münchow, F. Müller, M. Heck, J. Sanchez, F. Abudinen, AL Virto, F. Mueller, Oscar Alonso, R. Thalmeier, D. Klose, I. J. Watson, Soumen Paul, U. Packheiser, M. Ceccanti, N. Sato, Dipak Kumar Sahoo, D. Moya, B. Scavino, M. Fras, K. K. Rao, Takeo Higuchi, R. Richter, M. Albalawi, K. Nakamura, T. Kohriki, L. Zani, S. N. Mayekar, Svd Collaborations, Jakub Kandra, K. Prasanth, L. Macharski, S. Bacher, T. Morii, S. Bettarini, Jelena Ninkovic, Michael Ritzert, L. Bosisio, Jochen Dingfelder, Florian Schopper, Markus Friedl, D. Esperante, Ladislav Andricek, C. Kiesling, M. Boronat, H. Park, A. Bozek, Satoshi Tanaka, Tariq Aziz, Concettina Sfienti, C. W. Joo, R. Ayad, Seema Bahinipati, F. Lütticke, M. De Nuccio, U. Gebauer, Benjamin Schwenker, Zhiyong Liu, Steven Williams, Z. Natkaniec, Norbert Wermes, Carlos Marinas, B. Bhuyan, C. Schwanda, Shih-Chang Lee, T. Kuhr, G. Rizzo, W. Ostrowicz, S. Krivokuca, Frank Simon, B. Paschen, Maiko Takahashi, S. Vogt, H. G. Moser, R. Stever, Angel Dieguez, L. Gioi, F. Buchsteiner, Gerhard Schaller, H. Tanigawa, M. Gabriel, M. Hoek, A. Paladino, Rakesh Kumar, Gerhard Liemann, D. Getzkow, Peter Kvasnicka, B. Spruck, J.A.M. Grimaldo, Y. Onuki, K. H. Kang, T. Lueck, F. Poblotzki, S. Mccarney, P. K. Resmi, S. Schultschik, B. Gobbo, K. Lalwani, S. Rummel, D. Kittlinger, Ivan Peric, K. Gadow, Allen Caldwell, Martin Ritter, Dmytro Levit, Gagan Bihari Mohanty, To. Baroncelli, Keigo Hara, E. L. Barberio, F. Forti, L. Germic, U. Leis, A. Profeti, Tomasz Hemperek, S. Koike, B. Kisielewski, Marcel Vos, Peter Kodys, A. Bauer, P. Leitl, K. Ackermann, Ilya Komarov, Giulia Casarosa, H. Yin, Y. Soloviev, Jae-Young Lee, J. Fuster, Thomas Gessler, H. Schreeck, Phillip Urquijo, A. Martini, E. Paoloni, Carlos Lacasta, D. Červenkov, U. Stolzenberg, Pxd Belle Ii Depfet, L. Lanceri, I. Konorov, N. Dash, T. Czank, R. Blanco, G. N. Taylor, P. Wieduwilt, J. Suzuki, I. Rashevskaya, Hans Krüger, A. K. Basith, M. Rozanska, C. H. Wang, P. Kapusta, J. S. Lange, A. Rabusov, H. B. Jeon, Ivan Vila, A. Ishikawa, M. Schnecke, Filippo Bosi, T. Bilka, M. Watanabe, H. Ye, G. Caria, P. Gomis, E. Tafelmayer, M. Kumar, A. Frey, Jun Sasaki, J. Libby, K. Lautenbach, B. Deschamps, R. Sedlmeyer, Shoichi Watanuki, V. Bertacchi, Z. Doležal, S. Reiter, N. Kambara, Christian Irmler, C. Camien, T. Tsuboyama, J. Wiechczynski, Peter Fischer, W. Kun, P. Ahlburg, Wolfgang Kuhn, John Webb, L. Vitale, J. Zhao, Y. Bai, C. Niebuhr, European Commission, Ministerio de Economía y Competitividad (España), Ministry of Education, Culture, Sports, Science and Technology (Japan), Japan Society for the Promotion of Science, WPI Immunology Frontier Research Center (Japan), Federal Ministry of Science, Research and Economy (Austria), Australian Research Council, Ministry of Education, Youth and Sports (Czech Republic), Government of Czech Republic, Department of Science and Technology (India), Department of Atomic Energy (India), National Research Foundation of Korea, Ministry of Science and Higher Education (Poland), Federal Ministry of Science, Research and Economy (Germany), Kodyš, P., Abudinen, F., Ackermann, K., Ahlburg, P., Aihara, H., Albalawi, M., Alonso, O., Andricek, L., Ayad, R., Aziz, T., Babu, V., Bacher, S., Bahinipati, S., Bai, Y., Barberio, E., Baroncelli, Ti., Baroncelli, To., Basith, A. K., Batignani, G., Bauer, A., Behera, P. K., Bertacchi, V., Bettarini, S., Bhuyan, B., Bilka, T., Blanco, R., Bosi, F., Boronat, M., Bosisio, L., Bozek, A., Buchsteiner, F., Camien, C., Caldwell, A., Caria, G., Casarosa, G., Ceccanti, M., Červenkov, D., Chekelian, V., Czank, T., Dash, N., De Nuccio, M., Deschamps, B., Dieguez, A., Dingfelder, J., Doležal, Z., Esperante, D., Fischer, P., Forti, F., Fras, M., Frey, A., Friedl, M., Fuster, J., Gabriel, M., Gadow, K., Gebauer, U., Germic, L., Gessler, T., Getzkow, D., Gioi, L., Gobbo, B., Gomis, P., Grimaldo, J. A. M., Hara, K., Heck, M., Hemperek, T., Hensel, M., Higuchi, T., Hoek, M., Irmler, C., Ishikawa, A., Jeon, H. B., Joo, C., Kaleta, M., Kandra, J., Kambara, N., Kang, K. H., Kapusta, P., Kiesling, C., Kisielewski, B., Kittlinger, D., Klose, D., Koffmane, C., Kohriki, T., Koike, S., Komarov, I., Konorov, I., Krivokuca, S., Krüger, H., Kuhr, T., Kühn, W., Kumar, M., Kumar, R., Kun, W., Kvasnička, P., La Licata, C., Lacasta, C., Lalwani, K., Lanceri, L., Lange, J. S., Lautenbach, K., Lee, J. Y., Lee, S. C., Leis, U., Leitl, P., Levit, D., Libby, J., Liemann, G., Liu, Z., Lueck, T., Lütticke, F., Macharski, L., Mammini, P., Mariñas, C., Martini, A., Mayekar, S. N., Mccarney, S., Mohanty, G. B., Morii, T., Moser, H. G., Moya, D., Mueller, F. J., Müller, F., Münchow, D., Nakamura, K. R., Natkaniec, Z., Niebuhr, C., Ninkovic, J., Onuki, Y., Ostrowicz, W., Packheiser, U., Paladino, A., Paoloni, E., Park, H., Paschen, B., Paul, S., Peric, I., Poblotzki, F., Prasanth, K., Profeti, A., Rabusov, A., Rashevskaya, I., Rao, K. K., Reiter, S. P., P. K., Resmi, Richter, R., Ritter, M., Ritzert, M., Rizzo, G., Rozanska, M., Rummel, S., Sahoo, D., Sanchez, J. G., Sasaki, J., Sato, N., Scavino, B., Schaller, G., Schnecke, M., Schopper, F., Schreeck, H., Schultschik, S., Schwanda, C., Schwenker, B., Sedlmeyer, R., Sfienti, C., Simon, F., Skambraks, S., Soloviev, Y., Spruck, B., Stever, R., Stolzenberg, U., Stypula, J., Suzuki, J., Tafelmayer, E., Takahashi, M., Tanaka, S., Tanigawa, H., Taylor, G. N., Thalmeier, R., Tsuboyama, T., Urquijo, P., Vila, I., Virto, A. L., Vitale, L., Vogt, S., Vos, M., Wang, C., Watanuki, S., Watanabe, M., Watson, I. J., Webb, J., Wermes, N., Wessel, C., Wiechczynski, J., Wieduwilt, P., Williams, S., Windel, H., Ye, H., Yin, H., Zani, L., and Zhao, J.
Subjects: Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Silicon sensor, Phase (waves), Computer Science::Computational Geometry, 7. Clean energy, 01 natural sciences, law.invention, Nuclear physics, Belle II, Data acquisition, Pixel detector, Strip detector, Vertex detector, Instrumentation, law, 0103 physical sciences, Collider, Nuclear and High Energy Physic, Physics, Interconnection, Pixel, 010308 nuclear & particles physics, Detector, data acquisition, pixel detector, silicon sensor, strip detector, vertex detector, Upgrade, High Energy Physics::Experiment, Focus (optics)
Abstract: Belle II DEPFET, PXD, and SVD Collaborations: et al., The Belle II experiment comes with a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric ee collider with energies tuned to ϒ(4S) resonance s=10.588 GeV. The accelerator has successfully completed the first phase of commissioning in 2016 and the first electron–positron collisions in Belle II took place in April 2018. Belle II features a newly designed silicon vertex detector based on DEPFET pixel and double-sided strip layers. Currently, a subset of the vertex detector is installed (Phase 2 of the experiment). Installation of the full detector (Phase 3) will be completed by the end of 2018. This paper describes the Phase 2 arrangement of the Belle II silicon vertex detector, with focus on the interconnection of detectors and their integration with the software framework of Belle II. Alignment issues are discussed based on detector simulations and first acquired data., This work is supported by MSCA-RISE, European Union project JENNIFER (EU grant n. 644294), MEXT, Japan, WPI, and JSPS (Japan); ARC (Australia); BMWFW (Austria); MSMT, Czech Republic, GAUK 404316 (Czech Republic); AIDA-2020 (Germany); DAE, India and DST (India); INFN (Italy); NRF-2016K1A3A7A09005605 and RSRI (Korea); MNiSW (Poland); Federal Ministry of Education and Research (BMBF, Germany); and MINECO, Spain grant FPA2015-71292-C2-1-P (Spain).
Published: 2019

14. Das Rätsel der verschwundenen Antimaterie

Author: C. Kiesling
Subjects: Physics
Published: 2019

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

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

16. Measurement of charged particle multiplicity distributions in DIS at HERA and its implication to entanglement entropy of partons

Author: T. Greenshaw, T. Ravdandorj, T. Ullrich, V. Spaskov, K. Daum, Richard Polifka, A. Baghdasaryan, B. A. Schmookler, Katerina Lipka, A. Rostovtsev, S. Park, Emmanuelle Perez, Tomas Sykora, M. Sauter, Cristinel Diaconu, P. Sopicki, Peter Robmann, H. J. Meyer, David South, Steffen Schmitt, B. Stella, D. P. C. Sankey, C. Niebuhr, Daniel Pitzl, Th. Naumann, S. Egli, Paul Thompson, J. E. Olsson, R. Roosen, Y. Soloviev, Dirk Krücker, S. Shushkevich, V. Chekelian, Austin Baty, A. V. Fedotov, A. B. Meyer, Voica Radescu, B. Lobodzinski, Natasa Raicevic, J. Feltesse, Christoph Grab, M. Fleischer, D. Ozerov, J. Zhang, Arthur Eugen Bolz, D. Traynor, Vincent Boudry, A. N. Morozov, Jan Kretzschmar, Grzegorz Nowak, P. Kostka, L. Bystritskaya, P. Van Mechelen, S. Levonian, K. Müller, A. Petrukhin, C. Gal, Laurent Schoeffel, B. Tseepeldorj, R. C. W. Henderson, Andreas Werner Jung, D. Wegener, Daniel Andreas Britzger, Jean-Arcady Meyer, Judith Katzy, A.S. Belousov, M. Steder, K. Begzsuren, R. Žlebčík, P. Truöl, A. Specka, H. Zohrabyan, Z. P. Zhang, Maxime Gouzevitch, J. Žáček, F. Sefkow, F. Huber, P. E. Reimer, M. M. Mondal, Ankita Mehta, Roland Horisberger, A. Valkárová, A. Buniatyan, J. Cvach, Wolfgang Lange, Gerhard Brandt, A. M. Fomenko, J. Gayler, Tomas Hreus, Benno List, Xavier Janssen, S. Mikocki, Stephen Maxfield, Wei Li, Fabian Zomer, Katja Krüger, C. Kiesling, V. Andreev, N. Gogitidze, A. J. Campbell, J. B. Dainton, Matthieu Klein, J. G. Contreras, Dirk L. Hoffmann, I. Picuric, Guenter Eckerlin, André Schöning, J. Hladkỳ, L. Goerlich, A. Deshpande, E. Elsen, A. Grebenyuk, Karel Cerny, Laurent Favart, M. Jacquet, Roman Kogler, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, M. P. J. Landon, Paul Newman, Hannes Jung, Claus Kleinwort, C. Vallée, U. Straumann, H. U. Martyn, M. Kapichine, Z. Tu, K. B. C. Avila, C. Pascaud, A. Lebedev, D. Haidt, Jenny List, Marina Rotaru, E. Wünsch, Z. Chen, E. Rizvi, G. D. Patel, and H1 Collaboration
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Monte Carlo method, Hadron, Multiplicity (mathematics), Parton, HERA, Deep inelastic scattering, 01 natural sciences, Charged particle, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract: Charged particle multiplicity distributions in positron-proton deep inelastic scattering at a centre-of-mass energy $$\sqrt{s}=319$$ s = 319 GeV are measured. The data are collected with the H1 detector at HERA corresponding to an integrated luminosity of 136 pb$$^{-1}$$ - 1 . Charged particle multiplicities are measured as a function of photon virtuality $$Q^2$$ Q 2 , inelasticity y and pseudorapidity $$\eta $$ η in the laboratory and the hadronic centre-of-mass frames. Predictions from different Monte Carlo models are compared to the data. The first and second moments of the multiplicity distributions are determined and the KNO scaling behaviour is investigated. The multiplicity distributions as a function of $$Q^2$$ Q 2 and the Bjorken variable $$x_{\mathrm{bj}}$$ x bj are converted to the hadron entropy $$S_{\mathrm{hadron}}$$ S hadron , and predictions from a quantum entanglement model are tested.
Published: 2021

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

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

18. Search for lepton-flavor-violating tau-lepton decays to ℓγ at Belle

Author: J. Libby, D. M. Asner, K. Hayasaka, M. Bračko, B.A. Shwartz, E. Kovalenko, J. G. Shiu, M. Uchida, J. Biswal, M. Takizawa, Y. Seino, M. Starič, E. Prencipe, V. Bhardwaj, H. Nakazawa, M. T. Prim, Y. Jin, Phillip Urquijo, R. Kroeger, G. S. Varner, C.-L. Hsu, S. E. Vahsen, M. E. Sevior, Z. Doležal, P. Goldenzweig, V.N. Zhilich, Y. Kato, M. Sumihama, Y. B. Li, L. E. Piilonen, K. Trabelsi, C. MacQueen, R. Itoh, Y. Ushiroda, D. Epifanov, H. Hayashii, W. Sutcliffe, M. Campajola, K. Miyabayashi, A. Rostomyan, P. Oskin, E. Waheed, C. Sharma, Peter Kodys, W. W. Jacobs, B. G. Fulsom, D. Cinabro, L. Li Gioi, Tomoyuki Konno, Andrey Sokolov, Y. J. Kwon, Tagir Aushev, V. Zhukova, Y. Choi, G. Inguglia, M. Iwasaki, T. Podobnik, A. Korobov, M. Kumar, S. Uno, C. Schwanda, Y. Tao, H. Park, N. Rout, Y. Usov, R. Mizuk, Rocky Bala Garg, A. Bozek, M. Z. Wang, F. Di Capua, A. Frey, M. Röhrken, M. Niiyama, S.-J. Cho, V. Gaur, S. Nishida, Z. P. Zhang, X. L. Wang, S.-H. Park, J. Bennett, K. Tanida, Semen Eidelman, C. P. Shen, Seok Kim, Somnath Choudhury, S. Pardi, Dipak Kumar Sahoo, Sadaharu Uehara, T. Hara, Y. Unno, A. Sangal, G. B. Mohanty, Hiroaki Aihara, L. Nayak, V. Babu, A. Garmash, R. Van Tonder, Shih-Chang Lee, Y. Sakai, Samo Korpar, Steve K. Choi, Luka Santelj, R. Ayad, G. Schnell, S. Sandilya, T. Iijima, G. Pakhlova, P. Pakhlov, M. Merola, Y. Yusa, T. Ferber, C. H. Kim, F. Tenchini, A. K. Giri, A. Bobrov, D. Y. Kim, Bruce Yabsley, K. Senyo, D. Matvienko, D. Liventsev, C. Hadjivasiliou, V. Savinov, H. E. Cho, R. Pestotnik, Kohei Ogawa, M. Masuda, A. Natochii, T. Sumiyoshi, K. Inami, Iki Adachi, H. Ye, T. V. Dong, K. Matsuoka, K. Kumara, T. Kuhr, H. Kichimi, T. Uglov, E. Won, Z. S. Stottler, A. Ishikawa, K. Lieret, T. Sanuki, Felix Metzner, M. Nakao, G. Bonvicini, P. Križan, E. Wang, Jochen Dingfelder, W. B. Yan, K.-H. Kim, A. Vinokurova, O. Hartbrich, S. Cunliffe, O. Werbycka, M. Bessner, A. Kuzmin, M. Hernandez Villanueva, M. C. Chang, H. Atmacan, K. K. Joo, Y.-T. Lai, S. Ogawa, C. H. Wang, P. Krokovny, Rakesh Kumar, K. H. Kang, K. Cho, N. Gabyshev, D. Červenkov, N. K. Nisar, J. S. Lange, K. Uno, G.V. Russo, W. S. Hou, J. H. Yin, Florian Urs Bernlochner, C. Kiesling, N. Dash, E. Solovieva, S. Paul, A. Vossen, K. Nishimura, Frank Simon, Belle, Collaboration, Campajola, M., De Nardo, G., Di Capua, F., Merola, M., Pardi, S., Russo, G., and Et, Al.
Subjects: Nuclear and High Energy Physics, Particle physics, Physics beyond the Standard Model, QC770-798, +, 01 natural sciences, Nuclear and particle physics. Atomic energy. Radioactivity, 0103 physical sciences, Radiative transfer, ddc:530, 010306 general physics, Flavor, Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, e, High Energy Physics::Phenomenology, −, e +-e − Experiments, Belle experiment, Standard Model (mathematical formulation), Full data, High Energy Physics::Experiment, Experiments, Lepton
Abstract: Charged lepton flavor violation is forbidden in the Standard Model but possible in several new physics scenarios. In many of these models, the radiative decays τ± → ℓ±γ (ℓ = e, μ) are predicted to have a sizeable probability, making them particularly interesting channels to search at various experiments. An updated search via τ± → ℓ±γ using full data of the Belle experiment, corresponding to an integrated luminosity of 988 fb−1, is reported for charged lepton flavor violation. No significant excess over background predictions from the Standard Model is observed, and the upper limits on the branching fractions, $$ \mathcal{B} $$ B (τ± → μ±γ) ≤ 4.2 × 10−8 and $$ \mathcal{B} $$ B (τ± → e±γ) ≤ 5.6 × 10−8, are set at 90% confidence level.
Published: 2021

19. Commissioning and performance of the Belle II pixel detector

Author: Concettina Sfienti, F. Müller, Melissa K. Takahashi, R. Richter, S. Stefkova, A. Rabusov, S. Reiter, S. Mccarney, Benjamin Schwenker, D. Esperante, Ladislav Andricek, Allen Caldwell, Gerhard Schaller, Soumen Paul, M. Boronat, Michael Ritzert, D. Kittlinger, Q. Y. Liu, Ivan Vila, P. Leitl, K. Ackermann, D. Moya, I. Konorov, C. H. Wang, Norbert Wermes, Peter Kodys, B. Scavino, S. Krivokuca, Thomas Lück, P. Kapusta, B. Kisielewski, B. Deschamps, V. Babu, A. Frey, T. Kuhr, U. Gebauer, G. Giakoustidis, R. Sedlmeyer, Jelena Ninkovic, M. Schnecke, U. Leis, B. Spruck, J. Zhao, F. Lütticke, T. Bilka, Frank Simon, H. G. Moser, F. Mueller, V. Chekelian, K. Lautenbach, B. Paschen, Angel Dieguez, Oscar Alonso, P. Wieduwilt, Z. Doležal, J. Fuster, M. Fras, Zhiyong Liu, M. Heck, J. Sanchez, Gerhard Liemann, H. Ye, Thomas Gessler, Martin Ritter, Dmytro Levit, R. Ayad, P. Gomis, M. Hoek, P. Ahlburg, Belle-II Depfet, Peter Kvasnicka, Hans Krüger, C. Camien, F. Poblotzki, Carlos Marinas, E. Tafelmayer, S. Vogt, U. Stolzenberg, A. Bozek, Jochen Dingfelder, Florian Schopper, AL Virto, C. Koffmane, C. Niebuhr, H. Windel, F. Abudinen, Carlos Lacasta, D. Klose, M. Albalawi, Jakub Kandra, Daniel Greenwald, Y. Soloviev, L. Gioi, M. Hensel, J. S. Lange, L. Macharski, S. Skambraks, Ivan Peric, K. Gadow, M. Gabriel, Tomasz Hemperek, Marcel Vos, S. Huber, C. Kiesling, R. Stever, H. Schreeck, C. Wessel, Ministry of Education, Culture, Sports, Science and Technology (Japan), Japan Society for the Promotion of Science, European Commission, Federal Ministry of Education and Research (Germany), Ministerio de Economía y Competitividad (España), and World Premier International Research Center (Japan)
Subjects: Physics, Nuclear and High Energy Physics, Pixel, 010308 nuclear & particles physics, Physics beyond the Standard Model, 01 natural sciences, Noise (electronics), law.invention, Data set, Nuclear physics, Power consumption, law, 0103 physical sciences, Field-effect transistor, Collider, Instrumentation, Pixel detector
Abstract: Belle-II DEPFET and PXD Collaboration: et al., The Belle II experiment at the SuperKEKB energy-asymmetric e+ e- collider has completed a series of substantial upgrades and started collecting data in 2019. The experiment is expected to accumulate a data set of 50 ab−1 to explore new physics beyond the Standard Model at the intensity frontier. The pixel detector (PXD) of Belle II plays a key role in vertex determination. It has been developed using the DEpleted P-channel Field Effect Transistor (DEPFET) technology, which combines low power consumption in the active pixel area and low intrinsic noise with a very small material budget. In this paper, commissioning and performance of the PXD measured with first collision data are presented., This work is supported by MEXT, Japan, WPI, Japan, and JSPS (Japan); MSMT, GAUK 404316, MSCA-RISE project JENNIFER-2 (EU grant n. 822070) (Czech Republic); Federal Ministry of Education and Research (BMBF, Germany) and MINECO, Spain grant FPA2015-71292-C2-1-P (Spain).
Published: 2021

20. Erratum to: Determination of the strong coupling constant ${{{\alpha _{\mathrm{s}}(m_{\mathrm{Z}})}}}$ in next-to-next-to-leading order QCD using H1 jet cross section measurements

Author: V. Spaskov, Thomas Gehrmann, T. Greenshaw, T. Ravdandorj, P. Van Mechelen, Stephen Maxfield, D. Ozerov, N. Gogitidze, J. B. Dainton, Th. Naumann, D. Wegener, K. Daum, E. Gabathuler, Cristinel Diaconu, S. Ghazaryan, D. Salek, C. Pascaud, C. Vallée, A. Lebedev, S. Mikocki, D. Haidt, J. Cvach, S. Shushkevich, D. P. C. Sankey, David South, V. Dodonov, Steffen Schmitt, B. Stella, V. Chekelian, Daniel Pitzl, A. Buniatyan, B. Lobodzinski, K. Müller, D. Traynor, Alexander Bylinkin, K. B. Cantun Avila, Jan Kretzschmar, Tomas Sykora, M. Sauter, Gerhard Brandt, H. Pirumov, Laurent Schoeffel, B. Tseepeldorj, C. Kiesling, Jenny List, Richard Polifka, Arthur Eugen Bolz, Dirk Krücker, Claire Gwenlan, Marina Rotaru, A. J. Campbell, A. Grebenyuk, Xavier Janssen, M. P. J. Landon, R. Roosen, E. Wünsch, R. Žlebčík, A. Petrukhin, Monica Dobre, E. Rizvi, G. D. Patel, Ankita Mehta, P. D. Thompson, H. U. Martyn, Matthias Klein, A. V. Fedotov, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, P. Kostka, H. J. Meyer, I. Picuric, K. Begzsuren, I. Tsakov, Guenter Eckerlin, André Schöning, L. Goerlich, L. Bystritskaya, J. Žáček, J. Currie, F. Huber, Roland Horisberger, A. Valkárová, S. Levonian, A. B. Meyer, M. Fleischer, Tomas Hreus, H. Zohrabyan, A.S. Belousov, Daniel Andreas Britzger, P. Truöl, F. Sefkow, Maxime Gouzevitch, M. Jacquet, E. E. Elsen, Judith Katzy, R. Plačakytė, V. Andreev, Emmanuelle Perez, A. M. Fomenko, Y. Vazdik, J. E. Olsson, Dirk L. Hoffmann, Natasa Raicevic, J. Feltesse, Vincent Boudry, A. N. Morozov, V. Bertone, M. Steder, Karel Cerny, Roman Kogler, Katerina Lipka, Grzegorz Nowak, R. C. W. Henderson, Paul Newman, V. Brisson, Claus Kleinwort, Andreas Werner Jung, J. G. Contreras, U. Straumann, A. Specka, Jean-Arcady Meyer, Z. P. Zhang, Klaus Rabbertz, P. E. Reimer, J. Hladkỳ, A. Huss, Laurent Favart, Mark Sutton, P. Sopicki, Benno List, J. Niehues, Katja Krüger, M. Kapichine, A. Baghdasaryan, A. Rostovtsev, Fabian Zomer, Hannes Jung, C. Niebuhr, S. Egli, Y. Soloviev, Voica Radescu, Christoph Grab, Wolfgang Lange, J. Gayler, and Peter Robmann
Subjects: Physics and Astronomy (miscellaneous), Proton, distribution function [p], measured [channel cross section], parton: distribution function, Parton, QC770-798, Jet (particle physics), Astrophysics, strong interaction: coupling constant, deep inelastic scattering [positron p], factorization [scale], Quantum chromodynamics, Physics, scale: renormalization, positron p: deep inelastic scattering, higher-order: 2, perturbation theory: higher-order, HERA, dijet, 2 [higher-order], QB460-466, DESY HERA Stor, p: distribution function, jet: pair production, H1, distribution function [parton], coupling constant [strong interaction], channel cross section: measured, perturbation theory [quantum chromodynamics], electron p: deep inelastic scattering, Particle physics, neutral current, pair production [jet], jet: electroproduction, Factorization, Nuclear and particle physics. Atomic energy. Radioactivity, strong coupling, ddc:530, quantum chromodynamics: perturbation theory, Engineering (miscellaneous), electroproduction [jet], Order (ring theory), renormalization [scale], higher-order [perturbation theory], Distribution function, scale: factorization, deep inelastic scattering [electron p], experimental results
Abstract: The European physical journal / C 81(8), 738 (2021). doi:10.1140/epjc/s10052-021-09394-0, Published by Springer, Heidelberg
Published: 2021
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21. 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

22. Measurement of exclusive $${\varvec{{{{\pi ^+\pi ^-}}}}}$$ and $${\varvec{{{{\rho ^0}}}}}$$ meson photoproduction at HERA

Author: J. Žáček, Austin Baty, F. Huber, Steffen Schmitt, A. B. Meyer, M. Fleischer, D. Traynor, Daniel Andreas Britzger, Tomas Hreus, F. Sefkow, Maxime Gouzevitch, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, K. Müller, C. Niebuhr, A.S. Belousov, P. Truöl, S. Shushkevich, Stephen Maxfield, S. Egli, J. E. Olsson, Gerhard Brandt, Y. Soloviev, K. Daum, N. Gogitidze, P. Van Mechelen, A. M. Fomenko, Xavier Janssen, A. Petrukhin, R. C. W. Henderson, R. Roosen, Voica Radescu, Christoph Grab, Karel Cerny, M. Jacquet, Richard Polifka, E. Elsen, A. Grebenyuk, Roman Kogler, A. Buniatyan, Natasa Raicevic, Andreas Werner Jung, I. Picuric, Guenter Eckerlin, J. Feltesse, André Schöning, S. Park, L. Goerlich, Vincent Boudry, Emmanuelle Perez, Wei Li, V. Andreev, P. Sopicki, Arthur Eugen Bolz, M. P. J. Landon, Grzegorz Nowak, A. Deshpande, Jenny List, A. V. Fedotov, J. Cvach, K. B. Cantun Avila, S. Levonian, A. N. Morozov, Ankita Mehta, J. B. Dainton, A. Baghdasaryan, A. Rostovtsev, Judith Katzy, C. Kiesling, A. Specka, P. Kostka, B. A. Schmookler, Marina Rotaru, A. J. Campbell, Dirk L. Hoffmann, L. Bystritskaya, J. Hladkỳ, M. Kapichine, David South, H. Zohrabyan, Paul Newman, Th. Naumann, E. Wünsch, B. Stella, Claus Kleinwort, Cristinel Diaconu, H. U. Martyn, Matthias Klein, K. Begzsuren, M. Steder, Laurent Favart, Daniel Pitzl, Z. Chen, U. Straumann, P. D. Thompson, Benno List, E. Rizvi, G. D. Patel, V. Spaskov, Katja Krüger, C. Pascaud, J. Zhang, M. M. Mondal, C. Vallée, A. Lebedev, C. Gal, Laurent Schoeffel, Z. Tu, B. Tseepeldorj, Jan Kretzschmar, D. Haidt, Katerina Lipka, D. P. C. Sankey, R. Žlebčík, T. Greenshaw, Roland Horisberger, V. Chekelian, A. Valkárová, Fabian Zomer, T. Ravdandorj, B. Lobodzinski, H. J. Meyer, J. G. Contreras, Tomas Sykora, M. Sauter, Hannes Jung, D. Ozerov, Dirk Krücker, D. Wegener, P. E. Reimer, Jean-Arcady Meyer, Z. P. Zhang, S. Mikocki, Peter Robmann, Wolfgang Lange, and J. Gayler
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, Scattering, Hadron, HERA, 01 natural sciences, Vertex (geometry), Pion, 0103 physical sciences, Pi, Invariant mass, 010306 general physics, Engineering (miscellaneous)
Abstract: Exclusive photoproduction of $${{\rho ^0}} (770)$$ ρ 0 ( 770 ) mesons is studied using the H1 detector at the ep collider HERA. A sample of about 900,000 events is used to measure single- and double-differential cross sections for the reaction $$\gamma p \rightarrow \pi ^{+}\pi ^{-}Y$$ γ p → π + π - Y . Reactions where the proton stays intact ($${{{m_Y}} {=}m_p}$$ m Y = m p ) are statistically separated from those where the proton dissociates to a low-mass hadronic system ($$m_p{ m p < m Y < 10 GeV ). The double-differential cross sections are measured as a function of the invariant mass $$m_{\pi \pi }$$ m π π of the decay pions and the squared 4-momentum transfer t at the proton vertex. The measurements are presented in various bins of the photon–proton collision energy $${{W_{\gamma p}}} $$ W γ p . The phase space restrictions are $$0.5\le m_{\pi \pi } \le 2.2~{{\text {GeV}}} $$ 0.5 ≤ m π π ≤ 2.2 GeV , $$\vert t\vert \le 1.5~{{\text {GeV}^2}} $$ | t | ≤ 1.5 GeV 2 , and $$20 \le W_{\gamma p} \le 80~{{\text {GeV}}} $$ 20 ≤ W γ p ≤ 80 GeV . Cross section measurements are presented for both elastic and proton-dissociative scattering. The observed cross section dependencies are described by analytic functions. Parametrising the $${m_{\pi \pi }}$$ m π π dependence with resonant and non-resonant contributions added at the amplitude level leads to a measurement of the $${{\rho ^0}} (770)$$ ρ 0 ( 770 ) meson mass and width at $$m_\rho = 770.8{}^{+2.6}_{-2.7}~({\text {tot.}})~{{\text {MeV}}} $$ m ρ = 770.8 - 2.7 + 2.6 ( tot. ) MeV and $$\Gamma _\rho = 151.3 {}^{+2.7}_{-3.6}~({\text {tot.}})~{{\text {MeV}}} $$ Γ ρ = 151.3 - 3.6 + 2.7 ( tot. ) MeV , respectively. The model is used to extract the $${{\rho ^0}} (770)$$ ρ 0 ( 770 ) contribution to the $$\pi ^{+}\pi ^{-}$$ π + π - cross sections and measure it as a function of t and $${W_{\gamma p}}$$ W γ p . In a Regge asymptotic limit in which one Regge trajectory $$\alpha (t)$$ α ( t ) dominates, the intercept $$\alpha (t{=}0) = 1.0654\ {}^{+0.0098}_{-0.0067}~({\text {tot.}})$$ α ( t = 0 ) = 1.0654 - 0.0067 + 0.0098 ( tot. ) and the slope $$\alpha ^\prime (t{=}0) = 0.233 {}^{+0.067 }_{-0.074 }~({\text {tot.}}) ~{{\text {GeV}^{-2}}} $$ α ′ ( t = 0 ) = 0.233 - 0.074 + 0.067 ( tot. ) GeV - 2 of the t dependence are extracted for the case $$m_Y{=}m_p$$ m Y = m p .
Published: 2020

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

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

24. Study of electromagnetic decays of orbitally excited Ξc baryons

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

25. Measurement of the charm-mixing parameter yCP in D0→KS0ω decays at Belle

Author: Kang K.H, Kiyoshi Tanida, Sevior M.E, Shebalin, ervenkov D, Popov, K. Lieret, M. Ritter, Zhilich, Wang M.-Z., L. Cao, Y. Ushiroda, F. Tenchini, J. Bennett, R. Itoh, Semen Eidelman, M. Campajola, Ogawa K, N. Rout, N. Gabyshev, Stottler Z.S, Jyoti Prakash Biswal, Resmi P.K, M. Iwasaki, M. Watanabe, E. Prencipe, Kaliyar A.B, M. Uchida, Li L. K., G. Karyan, Stari M, Y. Unno, Kim S.H, Kim D.Y, Tagir Aushev, A. Vinokurova, Hou W.-S., G. Inguglia, A. Rostomyan, K. Chilikin, Park S.-H., D. Liventsev, Mohanty G.B, Prim M.T, G. Russo, S. Sandilya, R. Pestotnik, M. Nayak, D. Matvienko, H. Atmacan, Dole al Z, Bra ko M, R. Mussa, B. Bhuyan, Nisar N.K, Di Capua F, De Nardo G, M. Merola, Zhukova, D. Ferlewicz, A. Chen, Wang C.H, Browder T.E, Jeon H.B, T. Sanuki, Joo K.K, Samo Korpar, P. Goldenzweig, Jacobs W.W, P. Urquijo, Choi S.-K., D. Kotchetkov, Babu, P. Wang, Zhulanov, Asner D.M, S. Jia, Moon T.J, E. Won, H. Ono, Shiu J.-G, G. Pakhlova, Li Y. B., A. Ishikawa, P. Pakhlov, Kwon Y.-J., D. Epifanov, H. Park, Y. Seino, M. Nakao, C. Kiesling, S. Cunliffe, A. Garmash, Wang X.L, H. Aihara, Cheon B.G, S. Nishida, M. Niiyama, Pavel Krokovny, Di Carlo S, K. Nishimura, U. Tamponi, Yang S.B, T. Ferber, M. Masuda, Z. Natkaniec, Kim C.H, Dong T.V, Al Said S, Bhardwaj, Varvell K.E, K. Trabelsi, Li Gioi L, Y. Usov, A. Sokolov, M. Takizawa, S. Ogawa, O. Grzymkowska, G. Varner, Pedlar T.K, J. Libby, R. Kroeger, R. Ayad, T. Sumiyoshi, Schwartz A.J, T. Kuhr, Fulsom B.G, Y. Sakai, Gaur, Sayantan Choudhury, Prafulla Kumar Behera, Y. Choi, C. Schwanda, G. Bonvicini, D. Cinabro, T. Uglov, Lee S.C, Sudhanwa Patra, K. Senyo, Anjan K. Giri, H. Ye, Y. Iwasaki, Van Tonder R, Kri an P, T. Hara, Zhang Z.P, Y. Jin, A. Vossen, K. Miyabayashi, T. Matsuda, S. Paul, T. Kawasaki, Hsu C.-L., J. Schueler, A. Bozek, Piilonen L.E, N. Dash, E. Solovieva, Cho H.E, K. Hayasaka, S. Uno, S. Pardi, R. Garg, Xun-Jie Xu, B. Golob, Dipak Kumar Sahoo, O. Schneider, Strube J.F, R. Mizuk, Rajesh Kumar, K. Inami, T. Podobnik, S. Bahinipati, Savinov, Iki Adachi, Stani S, G. Schnell, Kim B.H, K. Cho, Fast J.E, and H. Hayashii
Subjects: Physics, Event selection, Particle physics, Annihilation, 010308 nuclear & particles physics, 0103 physical sciences, Charm (quantum number), State (functional analysis), 010306 general physics, 01 natural sciences, Mixing (physics), Energy (signal processing)
Abstract: We report the first measurement of the charm-mixing parameter y$_{CP}$ in D$^{0}$ decays to the CP-odd final state K0¦Sω. The study uses the full Belle e$^{+}$e$^{-}$ annihilation data sample of 976 fb$^{-1}$ taken at or near the Υ(4S) centre-of-mass energy. We find y$_{CP}$=(0.96±0.91±0.62(+0.17)¦(-0.00))%, where the first uncertainty is statistical, the second is systematic due to event selection and background, and the last is due to possible presence of CP-even decays in the data sample.
Published: 2020

26. Search for Axionlike Particles Produced in e+e− Collisions at Belle II

Author: C. Rosenfeld, R. M. Seddon, S. H. Robertson, H. Ye, S. Kohani, Martin Florian Bessner, Shuji Tanaka, R. Mussa, H. M. Wakeling, J. Serrano, R. Rasheed, H. Svidras, A. Ishikawa, M. Nakao, R. Mizuk, J. Bennett, Kevin Varvell, F. Meggendorfer, M. Reif, L. Zani, D. M. Asner, K. Hayasaka, X. L. Wang, K. Kumara, Z. S. Stottler, V. Chekelian, D. Rodríguez Pérez, K. Chilikin, Richard Peschke, A. Pathak, S. E. Vahsen, D. Tonelli, C. H. Li, E. De La Cruz-Burelo, P. Križan, Ashlie Martini, I. M. Peruzzi, M. De Nuccio, R. Van Tonder, C. H. Kim, H. Aihara, D. Greenwald, F. Müller, C. MacQueen, M. Takizawa, Claudia Cecchi, G. De Nardo, M. T. Hedges, P. Pakhlov, D. Matvienko, B. Spruck, Seokhee Park, Samo Korpar, S. Nishida, A. Sibidanov, Yukinori Sato, Carlos Marinas, M. Hoek, E. J. Jang, F. Bianchi, L. Santelj, Tao Luo, K. Dort, Hitoshi Hirata, Yoshinobu Unno, F. Tenchini, N. Akopov, J. G. Shiu, S. H. Kim, Yongsun Kim, K. Tanida, A. Gaz, J. Baudot, Z. Doležal, A. J. Schwartz, T. Sumiyoshi, C. Kleinwort, C. Wessel, V. Babu, H. Park, H. Nakazawa, B. Gobbo, H. Ono, Florian Urs Bernlochner, C. Schwanda, L. J. Wu, C. Kiesling, Martin Ritter, Dmytro Levit, Elisa Manoni, S. Jia, D. E. Jaffe, A. K. Giri, Abner Soffer, S. Marcello, Soumen Paul, Makoto Tabata, Jakub Kandra, Phillip Urquijo, M. Uchida, K. Chirapatpimol, S. Reiter, S. Watanuki, W. B. Yan, G. De Pietro, E. C. Hill, Semen Eidelman, Felix Metzner, K. Lieret, H. Windel, N. Rout, M. Masuda, B. Scavino, V. Gaur, G. Rizzo, P. Oskin, V. Bhardwaj, M. Bračko, M. Destefanis, L. Li Gioi, Michael Ritzert, T. E. Browder, Marco Milesi, M. Piccolo, E. Ganiev, T. Ferber, A. Garmash, L. Corona, S. J. Cho, M. Campajola, Tagir Aushev, S. Kurz, S. Wehle, U. Gebauer, S. Halder, Y. Ushiroda, Rocky Bala Garg, C. W. Joo, A. Gellrich, S. Bussino, C. Z. Yuan, P. Leitl, F. Dattola, T. V. Dong, D. Liventsev, H. Hayashii, V. Savinov, Y. Maeda, H. Kichimi, M. Welsch, Concettina Sfienti, T. M. G. Kraetzschmar, E. Prencipe, M. Yonenaga, T. Bilka, G. Varner, W. Gradl, Ya-Qiu Jin, R. de Sangro, C. Niebuhr, R. Stroili, T. K. Pedlar, Y. Seino, S. Ogawa, B. G. Cheon, Z. J. Liptak, N. Rad, M. Watanabe, E. Torassa, H. Ozaki, Paul Jackson, Yang Li, M. Wakai, C. Hadjivasiliou, L. M. Cremaldi, L. K. Li, Q. D. Zhou, A. Sangal, A. Rostomyan, J. Wiechczynski, I. Ripp-Baudot, V. Popov, E. Waheed, M. V. Purohit, N. Dash, E. Solovieva, M. Hohmann, A. Selce, T. Kuhr, S. Sandilya, U. Tamponi, E. Paoloni, S. Cunliffe, C.-L. Hsu, Seongbae Yang, C. La Licata, R. Itoh, B. G. Fulsom, A. Hershenhorn, K. Cho, Seema Bahinipati, A. Fodor, S. Bilokin, M. C. Chang, Antonio Budano, D. A. Sanders, G. Dujany, S. Patra, Q. Y. Liu, C. Miller, Y. Sakai, H. G. Moser, M. Z. Wang, K. Kinoshita, A. Panta, Nils Braun, Y-J Kwon, M. Merola, T. Geßler, Pavel Krokovny, D. Dossett, O. Hartbrich, S. Lacaprara, Leo Piilonen, K. Trabelsi, A. Paladino, M. Starič, S. K. Choi, Enrico Bernieri, P. Lewis, S. C. Lee, P. Taras, S. Uno, A. Passeri, I. Komarov, Peter Kodys, W. W. Jacobs, H. Tanigawa, S. Pardi, T. Koga, Kodai Matsuoka, Sw. Banerjee, F. Forti, G. B. Mohanty, Alberto Aloisio, Y. Yusa, A. De Yta-Hernandez, M. Hernandez Villanueva, Y. Kato, D. Ferlewicz, Doo Young Kim, I. Adachi, G. Polat, G. Casarosa, M. Mrvar, M. Bertemes, T. Uglov, M. E. Sevior, I. S. Lee, P. Goldenzweig, S. Fiore, Victoria Zhukova, M. H. A. Nouxman, L. Lanceri, W. Sutcliffe, R. Cheaib, Frank Simon, Yi Fan Hu, A. Vinokurova, R. Manfredi, I. Heredia-De La Cruz, G. Inguglia, N. Anh Ky, P. Branchini, C. H. Wang, E. Graziani, C. Hearty, G. Karyan, P. Gomis, J. F. Strube, D. Červenkov, Sunil Bansal, K. Senyo, D. Biswas, Rakesh Kumar, K. Miyabayashi, D. J. Summers, A. B. Kaliyar, S. Spataro, R. J. Sobie, John Webb, X. P. Xu, L. Vitale, E. Won, Takuya Higuchi, V. Aushev, M. T. Prim, S. Baehr, H. J. Kim, Stefano Longo, Dipak Kumar Sahoo, P. Bambade, Andreas Warburton, F. Meier, Bruce Yabsley, M. Remnev, K. Azmi, F. Abudinén, B. Golob, N. K. Nisar, J. S. Lange, T. D. Kimmel, S. Stefkova, D. Cinabro, R. Giordano, Jürgen Becker, P. Chang, M. Kumar, B. Paschen, Kohei Ogawa, F. Di Capua, A. Natochii, K. Inami, K. Unger, S. Bettarini, J. Libby, I. Nakamura, J. M. Roney, F. Ameli, M. Sumihama, C. Praz, R. Godang, Prafulla Kumar Behera, J. Irakkathil Jabbar, H. E. Cho, and Pere Rados
Subjects: Physics, Range (particle radiation), Particle physics, Gauge boson, Luminosity (scattering theory), Photon, 010308 nuclear & particles physics, General Physics and Astronomy, 01 natural sciences, law.invention, Standard Model, Pseudoscalar, Direct production, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider
Abstract: We present a search for the direct production of a light pseudoscalar a decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process e+e-→γa, a→γγ in the mass range 0.2
Published: 2020

27. Search for B0 decays to invisible final states ( +γ ) at Belle

Author: K. Arinstein, J. Libby, Y. Chao, S. Nishida, A.E. Bondar, Y. Teramoto, C. Ng, K. Senyo, K. Miyabayashi, V. Chekelian, Z. P. Zhang, V. Gaur, M. Shapkin, A.L. Sibidanov, Y. Choi, Z. Doležal, H. O. Kim, S. Uno, Sunmin Ryu, Norihito Muramatsu, E. Nakano, B.A. Shwartz, E. Solovieva, K. T. Kim, H. Miyata, M. Bischofberger, Toru Iijima, T. E. Browder, M. C. Chang, T. Iwashita, G. Varner, Y. Hoshi, R. Gillard, D. M. Asner, G. Tatishvili, Hitoshi Yamamoto, P. Vanhoefer, Peter Kodys, M. Röhrken, K. Chilikin, J. B. Singh, K. Hayasaka, S. E. Vahsen, Jochen Dingfelder, A. Ishikawa, M. Nakao, H. Farhat, C. W. Park, Vladimir Zhulanov, E. Won, H. K. Park, J. Dalseno, Leo Piilonen, M. Iwabuchi, M. E. Sevior, A. Kuzmin, Y. Iwasaki, V. Zhilich, W. S. Hou, O. Schneider, R. Louvot, Frank Simon, H. Park, A. Bozek, Phillip Urquijo, G. B. Mohanty, S. Okuno, Peter Kvasnicka, R. Pestotnik, T. Kawasaki, H. J. Kim, M. Ritter, Y. Usov, T. A. Shibata, V. Vorobyev, J. Li, G. Bonvicini, S. H. Lee, I. Adachi, Z. Drásal, T. Kuhr, S. Esen, B. Bhuyan, Y. S. Sohn, Yasuyuki Horii, C. L. Hsu, M. Uchida, G. Pakhlova, A. M. Bakich, S. Sandilya, D. Liventsev, A. J. Schwartz, Marko Petrič, Hiroaki Aihara, Yang Li, Y. Sakai, T. Julius, Po-Hsun Chen, Yongsun Kim, C. Schwanda, H. J. Hyun, P. Smerkol, H. Sahoo, T. Hara, K. Cho, T. Uglov, J. Haba, R. Itoh, P. Chang, P. Wang, Z. Q. Liu, J. H. Kang, D. Epifanov, Pavel Krokovny, B. G. Cheon, Jung-Hyun Kim, Y. Miyazaki, I. S. Cho, Y. M. Goh, T. Sumiyoshi, James E. Fast, T. K. Pedlar, A. Moll, S. L. Olsen, Samo Korpar, K. M. Williams, T. Sanuki, Semen Eidelman, H. Kichimi, A. Chen, Y. Unno, K. Trabelsi, K. Inami, C. P. Shen, M. Sumihama, B. R. Ko, O. Nitoh, H. Hayashii, Y. B. Hsiung, D. Dutta, M. Watanabe, M. Starič, Y. Watanabe, J. G. Shiu, Tagir Aushev, Y. Yamashita, V.M. Aulchenko, Yueh-Feng Liu, Z. Natkaniec, T. Ohshima, N. Gabyshev, C. Kiesling, M. Bračko, J. B. Kim, Samo Stanič, and Y. J. Kwon
Subjects: Physics, Particle physics, Photon, 010308 nuclear & particles physics, Electron–positron annihilation, Resonance, Photon energy, 01 natural sciences, law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, 010306 general physics, Collider
Abstract: We report searches for B0→invisible and B0→invisible+γ decays, where the energy of the photon is required to be larger than 0.5 GeV. These results are obtained from a 711 fb-1 data sample that contains 772×106BB¯ pairs and was collected near the ϒ(4S) resonance with the Belle detector at the KEKB e+e- collider. We observe no significant signal for either decay and set upper limits on their branching fractions at 90% confidence level of B(B0→invisible)
Published: 2020

28. Susceptibility characterization of beam pipe radiated noise for the PXD detector in Belle II experiment

Author: C. Kiesling, Hg Moser, A. Pradas, Francisco Arcega, F. Muller, F. Arteche, M. Iglesias, I. Echeverria, F. J. Piedrafita, and P. Leitl
Subjects: Physics, 010308 nuclear & particles physics, business.industry, Detector, Electromagnetic compatibility, 01 natural sciences, Electromagnetic radiation, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Upgrade, Optics, 0103 physical sciences, Coupling (piping), Physics::Accelerator Physics, Electronics, business, Noise (radio), Beam (structure)
Abstract: The new Pixel Vertex Detector (PXD) used in the upgrade of the high energy physics experiment Belle II is based on the DEPFET technology. Since the PXD is 2 mm far from the beam pipe, the effects of radiated interferences may be taken into account. Though the EM wave associated to the beam is very well confined (skin depth), the beam pipe is grounded to the accelerator and it may have noise currents on its external face due to pumps, auxiliary electronics, power converters, etc. which may produce radiated noise (H field). This analysis is part of the EMC approach that covers the analysis of the emissions and immunity characteristics, as well as the coupling phenomena and grounding issues to define the susceptibility levels required to ensure the successful integration of the detector and, specifically, to achieve the designed performance of the front-end electronics.
Published: 2020

29. 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

30. Belle II pixel detector: Performance of final DEPFET modules

Author: B. Deschamps, R. Sedlmeyer, Z. Doležal, S. Mccarney, S. Reiter, F. Lütticke, Zhiyong Liu, U. Packheiser, T. Kuhr, K. Lautenbach, P. Leitl, K. Ackermann, S. Krivokuca, L. Macharski, Belle-II Depfet, V. Babu, S. Skambraks, R. Ayad, B. Spruck, Allen Caldwell, S. Vogt, Thomas Gessler, Oscar Alonso, C. H. Wang, Martin Ritter, Dmytro Levit, Jochen Dingfelder, Florian Schopper, B. Kisielewski, H. G. Moser, Ivan Peric, K. Gadow, M. Hensel, C. Niebuhr, U. Leis, Angel Dieguez, Tomasz Hemperek, Peter Kvasnicka, H. Ye, Carlos Lacasta, M. Fras, A. Bozek, Marcel Vos, Ivan Vila, P. Wieduwilt, U. Stolzenberg, J. Zhao, D. Getzkow, H. Schreeck, P. Kapusta, V. Chekelian, C. Camien, A. Rabusov, Y. Bai, P. Ahlburg, Hans Krüger, M. Schnecke, Wolfgang Kuhn, Soumen Paul, T. Bilka, Frank Simon, L. Gioi, D. Moya, B. Scavino, D. Esperante, Ladislav Andricek, A. Frey, J. Fuster, S. Huber, C. Kiesling, I. Konorov, R. Stever, P. Gomis, E. Tafelmayer, Concettina Sfienti, R. Blanco, Jelena Ninkovic, Gerhard Schaller, B. Paschen, L. Germic, F. Abudinen, Carlos Marinas, Michael Ritzert, U. Gebauer, C. Koffmane, F. J. Müller, Maiko Takahashi, M. Hoek, F. Poblotzki, C. Wessel, D. Münchow, F. Müller, Y. Soloviev, S. Rummel, D. Kittlinger, J. S. Lange, Peter Kodys, M. Heck, J. Sanchez, R. Richter, Gerhard Liemann, M. Boronat, Norbert Wermes, H. Windel, D. Klose, M. Albalawi, Jakub Kandra, AL Virto, M. Gabriel, Benjamin Schwenker, Ministry of Education, Culture, Sports, Science and Technology (Japan), Japan Society for the Promotion of Science, World Premier International Research Center (Japan), European Commission, Ministry of Education, Youth and Sports (Czech Republic), Federal Ministry of Education and Research (Germany), and Ministerio de Economía y Competitividad (España)
Subjects: Physics, Nuclear and High Energy Physics, Luminosity (scattering theory), Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Resolution (electron density), Detector, 01 natural sciences, Optics, 0103 physical sciences, PXD, Belle II, High Energy Physics::Experiment, Field-effect transistor, Vertex detector, Impact parameter, 010306 general physics, business, Instrumentation, DEPFET, Pixel detector
Abstract: Belle-II DEPFET and PXD Collaboration: et al., A DEpleted P-channel Field Effect Transistor (DEPFET) based pixel detector was developed for the Belle II VerteX Detector (VXD). It is designed to achieve a good impact parameter resolution better than 15𝜇m at the very high luminosity conditions of this experiment. In the first half of 2018 four final production modules have been deployed in the commissioning run of the detector and their performance is discussed., This work is supported by MEXT, WPI, and JSPS (Japan); MSMT, GAUK 404316, MSCA-RISE project JENNIFER (EU grant n. 644294) (Czech Republic); Federal Ministry of Education and Research (BMBF, Germany) and MINECO grant FPA2015-71292-C2-1-P (Spain).
Published: 2020

31. A 3D track finder for the Belle II CDC L1 trigger

Author: S. Skambraks, Felix Meggendorfer, Jürgen Becker, C. Kiesling, Sara McCarney, Steffen Bähr, K. Unger, and Raynette Van Tonder
Subjects: History, Artificial neural network, Plane (geometry), business.industry, Computer science, Track (disk drive), Physics, Monte Carlo method, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Collision, Computer Science Applications, Education, law.invention, law, Computer vision, ddc:530, Artificial intelligence, Polar coordinate system, Collider, business
Abstract: Machine learning methods are integrated into the pipelined first level (L1) track trigger of the upgraded flavor physics experiment Belle II at KEK in Tsukuba, Japan. The novel triggering techniques cope with the severe background from events outside the small collision region provided by the new SuperKEKB asymmetric-energy electron-positron collider. Using the precise drift-time information of the central drift chamber which provides axial and stereo wire layers, a neural network L1 trigger estimates the 3D track parameters of tracks, based on input from the axial wire planes provided by a 2D track finder. An extension of this 2D Hough track finder to a 3D finder is proposed, where the single hit representations in the Hough plane are trained using Monte Carlo. This 3D finder improves the track finding efficiency by including the stereo sense wires as input. The estimated polar track angle allows a specialization of the subsequent neural networks to sectors in the polar angle.
Published: 2020

32. First search for the ηc2(1D) in B decays at Belle

Author: F. Di Capua, P. Pakhlov, H. Aihara, J. Biswal, Tagir Aushev, S. Nishida, R. Mussa, M. Uchida, W. B. Yan, Z. Natkaniec, C. MacQueen, Leo Piilonen, V. Zhukova, Y. Onuki, L. K. Li, K. Sumisawa, V. Bhardwaj, M. Iwasaki, B. G. Cheon, K. Nishimura, C.-L. Hsu, J. H. Yin, G. Schnell, Pavel Krokovny, S. Cunliffe, M. C. Chang, H. Hayashii, P. L. Wang, A. Ishikawa, Y. Seino, M. Nakao, C. Kiesling, G. Pakhlova, T. K. Pedlar, A. Sangal, T. Kuhr, P. Križan, T. Mori, Y. Usov, Y. Choi, B. Golob, K. Trabelsi, K. Lieret, V.M. Aulchenko, Z. S. Stottler, R. Itoh, V. Savinov, Rok Pestotnik, A. Rostomyan, M. Campajola, N. K. Nisar, Prafulla Kumar Behera, V. Popov, V. Gaur, K. Belous, Andrey Sokolov, Peter Kodys, W. W. Jacobs, J. S. Lange, T. D. Kimmel, S. K. Choi, M. Mrvar, Z. P. Zhang, T. Sumiyoshi, M. Bračko, M. Z. Wang, T. Podobnik, E. Solovieva, Jia-ju Zhang, A. B. Kaliyar, M. Hernandez Villanueva, K. Kinoshita, Y. Iwasaki, Martin Ritter, N. Dash, V. Babu, Y. J. Kwon, T. Sanuki, J. Schueler, N. Gabyshev, D. Červenkov, Shih-Chang Lee, N. Rout, Y. Sakai, Phillip Urquijo, G. Varner, X. P. Xu, P. Oskin, E. Prencipe, L. Cao, T. Ferber, M. Nayak, G. Karyan, B. G. Fulsom, James E. Fast, K. Senyo, Seokhee Park, Rocky Bala Garg, Samo Korpar, C. H. Kim, Y. B. Li, S. Al Said, Luka Santelj, V.N. Zhilich, Semen Eidelman, Sadaharu Uehara, L. Li Gioi, A. Garmash, Y. Kato, D. Ferlewicz, W. Sutcliffe, K. Chilikin, G. De Nardo, T. J. Moon, A. Chen, Soumen Paul, C. Beleño, H. Park, A. Bozek, K. Miyabayashi, M. Shapkin, Kohei Ogawa, S. Patra, Kiyoshi Tanida, E. Wang, M. Röhrken, G.V. Russo, K. Inami, R. Kulasiri, Yongsun Kim, Yoshinobu Unno, W. S. Hou, Z. Doležal, K. Lalwani, S. Uno, C. Schwanda, D. Cinabro, A. K. Giri, K. K. Joo, E. Won, V. Chekelian, M. Merola, G. B. Mohanty, M. Masuda, D. Matvienko, B.A. Shwartz, T. V. Dong, C. Z. Yuan, M. Starič, D. Liventsev, M. Takizawa, Vladimir Zhulanov, K.-H. Kim, R. Kroeger, I. S. Lee, P. Goldenzweig, V. Vorobyev, S. Jia, Y. Jin, O. Grzymkowska, C. H. Wang, H. Ye, T. Bilka, M. Watanabe, T. E. Browder, T. Matsuda, G. Bonvicini, J. Libby, D. M. Asner, K. Hayasaka, A. Vinokurova, J. G. Shiu, O. Hartbrich, S. H. Kim, Rakesh Kumar, M. T. Prim, Takeo Kawasaki, Shoichi Watanuki, D. Epifanov, S. Pardi, Seongbae Yang, G. Inguglia, Somnath Choudhury, J. Bennett, T. Uglov, A. Kuzmin, E.-J. Jang, S. Ogawa, F. Tenchini, R. Ayad, K. Cho, Seema Bahinipati, Iki Adachi, Doo Young Kim, H. Ono, R. Mizuk, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Belle, Collaboration, Campajola, M., De Nardo, G., Di Capua, F., Merola, M., Pardi, S., Russo, G., and Et, Al.
Subjects: +charmed+meson+K%2B%22">B+ --> charmed meson K+, Analytical chemistry, +charmed+meson+pi%2B+K0%28S%29%22">B+ --> charmed meson pi+ K0(S), annihilation [electron positron], 01 natural sciences, High Energy Physics - Experiment, e +e − experiments, Experiment, 10.57 GeV-cms, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics, [PHYS]Physics [physics], B0: hadronic decay, e+-e- Experiments, e, B+: branching ratio: upper limit, e +-e − Experiments, electron positron: colliding beams, Quarkonium, 3. Good health, +charmed+meson+K0%28S%29%22">B0 --> charmed meson K0(S), electroproduction [Upsilon(10570)], colliding beams [electron positron], radiative decay [charmed meson], quarkonium, Nuclear and High Energy Physics, spectroscopy, Upsilon(10570): electroproduction, Meson, +photon+h%2Fc%283526%29%22">charmed meson --> photon h/c(3526), BELLE, electron positron: annihilation, +, KEKB, KEK-B, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, ddc:530, +charmed+meson+K%2B+pi%22">B0 --> charmed meson K+ pi, 010306 general physics, hadronic decay [B0], mesons, 010308 nuclear & particles physics, h/c(3526), branching ratio: upper limit [B+], B0: branching ratio: upper limit, −, Resonance, e(+)-e(-) experiments, charmed meson: radiative decay, B+: hadronic decay, lcsh:QC770-798, hadronic decay [B+], branching ratio: upper limit [B0], experimental results
Abstract: Journal of high energy physics 2020(5), 34 (2020). doi:10.1007/JHEP05(2020)034, The first dedicated search for the η$_{c2}$(1D) is carried out using the decays B$^{+}$→ η$_{c2}$(1D)K$^{+}$, B$^{0}$ → η$_{c2}$(1D)$ {K}_S^0 $, B$^{0}$→ η$_{c2}$(1D)π$^{−}$K$^{+}$, and B$^{+}$→ η$_{c2}$(1D)π$^{+} {K}_S^0 $ with η$_{c2}$(1D) → h$_{c}$γ. No significant signal is found. For the η$_{c2}$(1D) mass range between 3795 and 3845 MeV/c$^{2}$, the branching-fraction upper limits are determined to be ℬ(B$^{+}$→ η$_{c2}$(1D)K$^{+}$) × ℬ(η$_{c2}$(1D) → h$_{c}$γ) < 3.7 × 10$^{−5}$, ℬ(B$^{0}$→ η$_{c2}$(1D)K$^{0}$) × ℬ(η$_{c2}$(1D) → h$_{c}$γ) < 3.5 × 10$^{−5}$, ℬ(B$^{0}$→ η$_{c2}$(1D)π$^{−}$K$^{+}$) × ℬ(η$_{c2}$(1D) → h$_{c}$γ) < 1.0 × 10$^{−4}$, and ℬ(B$^{+}$→ η$_{c2}$(1D)π$^{+} {K}_S^0 $) × ℬ(η$_{c2}$(1D) → h$_{c}$γ) < 1.1 × 10$^{−4}$ at 90% C.L. The analysis is based on the 711 fb$^{−1}$ data sample collected on the ϒ(4S) resonance by the Belle detector, which operated at the KEKB asymmetric-energy e$^{+}$e$^{−}$ collider.[graphic not available: see fulltext], Published by SISSA, [Trieste]
Published: 2020

33. Measurement of the Michel parameters (η‾, ξκ ) in the radiative leptonic decay of τ

Author: J. E. Fast, D. Dossett, M. Niiyama, L. Pesántez, V. Trusov, Andrey Sokolov, S. Shinomiya, Byeong Rok Ko, M. Feindt, I. Nakamura, V. Babu, Hui Li, Jingxu Wang, T. Aushev, O. Frost, Z. Suzuki, J. Grygier, J. H. Kang, Y. Miyachi, Hikaru Kawai, M. Belhorn, Benjamin Schwenker, T. Zivko, Y. B. Hsiung, K. Neichi, A. Zupanc, C. C. Zhang, E. Nakano, Antonio Limosani, T. Ferber, D. H. Lee, H. Kakuno, H. Shibuya, M. Watanabe, L. S. Peak, C. Niebuhr, O. Nitoh, K. Nishimura, Chawon Park, A. Loos, J. C. Dingfelder, M. V. Purohit, P. Goldenzweig, Rupert Leitner, V. V. Zhulanov, J. Yamaoka, Xiuwan Li, K. Senyo, S. Eidelman, L. Shang, Ihn Sik Seong, S. Sandilya, K. Ueno, M. Heck, M. J. Kim, T. Kawasaki, P. Pakhlov, W. Ostrowicz, U. Tamponi, Anton Poluektov, T. Schlüter, S. Sugihara, M. Starič, Y. Igarashi, M. Masuda, Dipanwita Dutta, A. Sugiyama, T. Kumita, M. Uchida, X. H. He, D. Cinabro, Philip Lewis, G. B. Mohanty, C. H. Li, Massimo Berger, B. H. Kim, Y. Yook, H. Yamamoto, L. K. Li, V.N. Zhilich, Y. Kato, V. Chobanova, Y. Kuroki, Satoshi Tanaka, D. Liventsev, Y. Arita, I. Jaegle, K. Miyabayashi, M. Lubej, G. Inguglia, I. Badhrees, Y. Koga, E. Nedelkovska, F. Breibeck, H. Park, J. Stypula, C. Kiesling, E. J. White, A. Bozek, P. Chang, G. S. Varner, Y.-T. Lai, K. Suzuki, P. Schonmeier, M. Iwabuchi, R. Mussa, H. B. Jeon, O. Grzymkowska, C. H. Wang, M. Grosse Perdekamp, R. Itoh, Jung-Hyun Kim, S. Wehle, T. Keck, S. Paul, L. Li Gioi, Y. Yamashita, C. Z. Yuan, Yukinori Sato, J. G. Shiu, M. Nayak, T. Bloomfield, A. Ishikawa, A. Drutskoy, S. E. Vahsen, A. Bay, C.-L. Hsu, T. Saito, S. Rummel, T. Matsuda, Yu Nakahama, M. Tanaka, T. Peng, G. Schnell, A. Rostomyan, Tsukasa Aso, P. Wang, H. Miyata, Y. Hoshi, M. Barrett, B. Bhuyan, Y.L. Han, A. Frey, H. Ye, P. Križan, T. Iijima, Jun Sasaki, H. G. Moser, M. Bračko, Y. Iwasaki, B. G. Fulsom, Peter Kodys, W. W. Jacobs, T. E. Browder, Y. J. Kwon, K. Nakamura, Ya-Qiu Jin, P. Hamer, K. Hayasaka, A. Bobrov, H. Hayashii, Hyunyong Kim, O. Schneider, K. Prasanth, M. Imamura, T. Nagamine, K. Trabelsi, P. Katrenko, T. Müller, J. Klucar, K. T. Kim, C. P. Shen, S. Di Carlo, Seok Kim, S. Okuno, B. Shwartz, Jamal Rorie, D. Getzkow, C. B. Van Hulse, I. Adachi, A. Ogawa, K. Negishi, T. Kuhr, D. Z. Besson, E. Ribežl, D. Santel, Phillip Urquijo, N. Sasao, Victoria Zhukova, V. Savinov, M. Danilov, H. Nakayama, D. Y. Kim, R. Gillard, R. Mizuk, Eberhard Widmann, J. F. Strube, Matthew Jones, M. Z. Wang, K. Kinoshita, M. Yamauchi, G. Bonvicini, Y. B. Li, Y. Teramoto, I. Tikhomirov, D. Mohapatra, J. B. Singh, A. Chen, K. Hara, S. K. Choi, Sanmay Ganguly, T. Uchida, Y. Ban, N. Zwahlen, Bruce Yabsley, L. Zhao, M. Heider, M. Rozanska, D. Kotchetkov, Y. Yusa, A. Vinokurova, S. Dubey, Rahul Kumar, J. Libby, R. Louvot, Y. Chao, G. N. Taylor, R. Glattauer, V.E. Shebalin, J. Haba, W. Bartel, S. Nishida, S. Al Said, K. Hoshina, Y. Seino, Y. Onuki, K. Vervink, Z. Drásal, Marko Petrič, M. T. Prim, K. Itagaki, Z. Q. Liu, C. Bookwalter, B. G. Cheon, H. J. Hyun, S. Uozumi, P. Smerkol, Tariq Aziz, X. L. Wang, D. Heffernan, T. Morii, C. Boulahouache, J. Hasenbusch, V. Chekelian, J. Li, V. M. Aulchenko, H. Guo, T.-A. Shibata, T. Horiguchi, Y. Ono, S. Koblitz, Seema Bahinipati, Y. Choi, H. Takeichi, K. J. Nath, S. Uno, C. Schwanda, P. Krokovny, M. T. Hedges, Samo Stanič, L.M. Zhang, E. Kurihara, A.E. Bondar, P.A. Lukin, T. Nakano, K. Dutta, A. Garmash, Daniel Greenwald, M. Takizawa, B. Reisert, Y. Sakai, J. Rauch, B. K. Pal, E. L. Barberio, M. Shapkin, Noritaka Shimizu, T. Hara, L. Santelj, J. Dalseno, Robin Wedd, K. M. Williams, V. Bansal, K. Belous, A. M. Bakich, S. Korpar, Jolanta Brodzicka, John Yelton, T. Ohshima, Z. Doležal, K. Chilikin, Y. J. Kim, N. Dash, S. Iwata, H. Ozaki, H. Nakano, C. Ng, K. H. Kang, K. Cho, K. Inami, M. Sumihama, A. Heller, M. D. Peters, Motoki Iwasaki, Y. Ushiroda, N. Taniguchi, Y. M. Goh, S. H. Lee, K. Prothmann, R. Pestotnik, N. Gabyshev, D. Červenkov, A. Abdesselam, M. Steder, M. E. Sevior, I. S. Lee, D. Matvienko, Y. Miyazaki, R. Sinha, P. K. Behera, Yasushi Nagasaka, B. Kronenbitter, Sumio Yamada, E. Kato, M. Leitgab, Tao Luo, K. Tanida, F. Tenchini, T. Sumiyoshi, A. Bala, D. Epifanov, Soumya D. Mohanty, C. Pulvermacher, Martin Ritter, Dmytro Levit, Z. Natkaniec, S. L. Blyth, T. Sanuki, Shigeki Hirose, K. K. Joo, Hirokazu Miyake, R. Seidl, Y. Guan, E. Solovieva, Norihito Muramatsu, M. Huschle, K. Sakai, Y. Watanabe, S. K. Kim, A.L. Sibidanov, H. Kichimi, M. C. Chang, K. S. Park, V. Bhardwaj, T. K. Pedlar, T. Tsuboyama, H. Palka, L. E. Piilonen, G. Pakhlova, J. Wiechczynski, R. Kulasiri, S. U. Kataoka, S. Yashchenko, A. Moll, S. L. Olsen, D. Joffe, T. Julius, Po-Hsun Chen, R. Chistov, A. Vossen, O. Seon, Frank Simon, D. Semmler, Y. Unno, K. F. Chen, R. Ayad, T. Nozaki, S. Uehara, M. N. Wagner, Peter Kvasnicka, A. B. Kaliyar, Sunmin Ryu, C. W. Park, E. Won, C. Oswald, H. Atmacan, P. Vanhoefer, E. Panzenböck, B. Golob, M. Schram, N. K. Nisar, H. K. Moon, J. S. Lange, M. Ziegler, K. Adamczyk, Y. Soloviev, W. S. Hou, K. Arinstein, Y. Mikami, Alexei Kuzmin, V. Vorobyev, Nagao Kobayashi, Y. F. Liu, C. Kleinwort, Z. P. Zhang, H. Sahoo, Tara Nanut, T. Uglov, Yoji Hasegawa, S. Y. Suzuki, Richard T. Kouzes, K. Sumisawa, D. M. Asner, S. Himori, Kevin Varvell, A. Matyja, Jason Crnkovic, T. Mori, H. Aihara, Y. Usov, Jyoti Prakash Biswal, C. Liu, H. Nakazawa, A. J. Schwartz, H. Farhat, J. B. Kim, T. Higuchi, S. Ogawa, V. Gaur, Y. S. Sohn, Ferdinando Giordano, M. Nakao, E. Waheed, S. McOnie, J. MacNaughton, and P. Kapusta
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Maximum likelihood, Electron–positron annihilation, 01 natural sciences, law.invention, Nuclear physics, KEKB, law, 0103 physical sciences, Radiative transfer, Michel parameters, Statistical analysis, 010306 general physics, Collider, Lepton
Abstract: We present the first measurement of the Michel parameters η ‾ and ξκ in the radiative leptonic decay of the τ lepton using 703 fb-1 of data collected with the Belle detector at the KEKB e + e − collider. The Michel parameters are measured by an unbinned maximum likelihood fit to the kinematic information of e + e − → τ + τ − → ( π + π 0 ν ‾ ) ( l − ν ν ‾ γ ) ( l = e or μ ) . The preliminary values of the measured Michel parameters are η ‾ = − 2.0 ± 1.5 ± 0.8 and ξ κ = 0.6 ± 0.4 ± 0.2 , where the first error is statistical and the second is systematic.
Published: 2017

34. Data quality monitors of vertex detectors at the start of the Belle II experiment

Author: Oscar Alonso, Tomoyuki Kono, S. Bacher, M. Fras, S. Das, S. Skambraks, S. Watanuki, Zhen’An Liu, S. Reiter, S. Bettarini, Takeo Higuchi, U. Stolzenberg, T. Zhang, A. Paladino, Toru Tsuboyama, L. Corona, J. Baudot, S. Mccarney, Rainer Richter, Benjamin Schwenker, Concettina Sfienti, M. Hensel, Nils Braun, Boqun Wang, P. Kodyš, K. K. Rao, O. Verbycka, Lorenzo Vitale, Mikihiko Nakao, M. Heck, J. Sanchez, H. Windel, G. Batignani, Jesus Abudinen, Katsuro Nakamura, Michael Ritzert, K. Adamczyk, Eugenio Paoloni, Dipak Kumar Sahoo, K. Lautenbach, Daniel Greenwald, H. Yin, Y. Soloviev, I. Ripp-Baudot, C. Niebuhr, T. Czank, S. Y. Suzuki, U. Leis, Gerhard Liemann, C. W. Joo, M. Gabriel, S. Yamada, L. Zani, Jelena Ninkovic, Gaetano de Marino, Markus Friedl, Igor Konorov, L. Gioi, B. Deschamps, T. Kuhr, S. Krivokuca, Mohammed Albalawi, Gerhard Schaller, D. Klose, R. Sedlmeyer, Hua Ye, L. Macharski, B. Paschen, Y. B. Li, U. Gebauer, Stephan Paul, Allen Caldwell, Chiara La Licata, Chunhua Li, F. Buchsteiner, Oskar Hartbrich, Jakub Kandra, A. B. Kaliyar, Z. Doležal, N. Rout, Shuji Tanaka, Norbert Wermes, H. Aihara, Christian Irmler, C. Camien, Vladimir Chekelian, P. Leitl, K. Ackermann, Thomas Gessler, Souvik Maity, B. Spruck, R. Itoh, J.A.M. Grimaldo, D. Moya, S. Bahinipati, G. Dujany, Seokhee Park, R. Thalmeier, B. Kisielewski, Christian Koffmane, Jochen Dingfelder, Florian Schopper, F. Forti, Carlos Marinas, A. Ishikawa, E. Ganiev, B. Scavino, AL Virto, S. N. Mayekar, Pablo Gomis López, Maiko Takahashi, T. Kohriky, Y. Uematsu, Frank Simon, P. Wieduwilt, Z. Natkaniec, T. Aziz, M. Hoek, Daniel Esperante, D. Kittlinger, M. Kaleta, H. G. Moser, Angel Dieguez, Ladislav Andricek, Giulia Casarosa, R. Ayad, F. Poblotzki, L. Santelj, T. Morii, A. Bozek, H. Tanigawa, N. Sato, B. Gobbo, K. Lalwani, Jens Sören Lange, H. Schreeck, Qingyuan Liu, F. Müller, Martin Ritter, Dmytro Levit, K. H. Kang, N. Dash, Rajeev Kumar, D. Červenkov, Yeqi Chen, G. B. Mohanty, F. Luetticke, Hans Krüger, Peter Kvasnicˇka, A. Rabusov, C. Kiesling, C. Wessel, G. Rizzo, R. Stever, Y. Onuki, V. Babu, Yinghui Guan, Stefan M. Huber, G. Giakoustidis, Ivan Peric, K. Gadow, Koji Hara, James Webb, Marca Boronat, Tomasz Hemperek, Marcel Vos, Thomas Lück, Prafulla Kumar Behera, Seungcheol Lee, Juan Fuster, K. Wan, P. Kapusta, J. Wiechczynski, P. Ahlburg, M. Schnecke, S. Halder, T. Bilka, Christoph Schwanda, W. Ostrowicz, S. Stefkova, L. Lanceri, J. Libby, M. Kumar, A. Frey, S. Hazra, E. Tafelmayer, Felix Johannes Müller, H. B. Jeon, Ivan Vila, H. Park, S. Vogt, Carlos Lacasta, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Belle-II, PXD, SVD, DAQ, DQM, and software
Subjects: Physics::Instrumentation and Detectors, QC1-999, vertex detector, BELLE, quality: monitoring, 01 natural sciences, 7. Clean energy, programming, Silicon vertex detector, law.invention, Nuclear physics, semiconductor detector: pixel, law, 0103 physical sciences, Quality monitoring, [INFO]Computer Science [cs], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Collider, numerical calculations, detector: design, activity report, Physics, 010308 nuclear & particles physics, Detector, Upgrade, Full data, Data quality, Physics::Accelerator Physics, semiconductor detector: microstrip, High Energy Physics::Experiment, upgrade, Vertex detector, monitoring: on-line, performance
Abstract: The Belle II experiment features a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric e+e− collider at KEK in Tsukuba, Japan. The accelerator completed its first phase of commissioning in 2016, and the Belle II detector saw its first electron-positron collisions in April 2018. Belle II features a newly designed silicon vertex detector based on double-sided strip layers and DEPFET pixel layers. A subset of the vertex detector was operated in 2018 to determine background conditions (Phase 2 operation). The collaboration completed full detector installation in January 2019, and the experiment started full data taking. This paper will report on the final arrangement of the silicon vertex detector part of Belle II with a focus on online monitoring of detector conditions and data quality, on the design and use of diagnostic and reference plots, and on integration with the software framework of Belle II. Data quality monitoring plots will be discussed with a focus on simulation and acquired cosmic and collision data.
Published: 2019

35. Search for B0→X(3872)γ

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

36. 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

37. 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

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

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

39. 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

40. 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

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

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

42. 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

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

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

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

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

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

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

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

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

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

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

48. First measurement of the CKM angle ϕ$_{3}$ withS B$^{\pm}$ → D($ {K}_{\mathrm{S}}^0 $π$^{+}$+π$^{-}$π$^{0}$) K$^{\pm}$ decays

Author: C. MacQueen, S. Sandilya, B.A. Shwartz, Y. Guan, T. Bilka, Bingran Wang, A. J. Schwartz, T. Uglov, H. Aihara, T. K. Pedlar, M. Starič, D. Liventsev, T. Matsuda, M. Campajola, G. Inguglia, Z. S. Stottler, R. Kroeger, M. E. Sevior, V.N. Zhilich, K. Miyabayashi, I. Badhrees, A. Vinokurova, J. G. Shiu, H. Ye, P. Goldenzweig, M. Bračko, S. H. Kim, Iki Adachi, Tao Luo, E. Prencipe, Shih-Chang Lee, Y. Usov, Rakesh Kumar, K. H. Kang, J. Bennett, N. K. Nisar, G. Schnell, T. Iijima, James E. Fast, S. Al Said, G. De Nardo, Y. Iwasaki, Y. J. Kwon, Rok Pestotnik, J. Biswal, Z. P. Zhang, V. Babu, Semen Eidelman, M. Iwasaki, Doo Young Kim, A. K. Giri, H. E. Cho, O. Schneider, T. Nakano, B. G. Fulsom, D. Epifanov, M. Niiyama, P. C. Lu, H. B. Jeon, A. Ishikawa, U. Tamponi, T. Kuhr, B. Pal, B. G. Cheon, T. Sumiyoshi, D. Matvienko, P. Krǐzan, M. Z. Wang, Y. Seino, Somnath Choudhury, M. Nakao, T. Ferber, G. Pakhlova, K. Kinoshita, Martin Ritter, Seongbae Yang, N. Dash, Y. Jin, C. H. Wang, Pavel Krokovny, V. Shebalin, G.V. Russo, C. P. Shen, W. S. Hou, T. Sanuki, S. Cunliffe, A. Kuzmin, S. Ogawa, F. Tenchini, J. F. Strube, F. Di Capua, D. Kotchetkov, S. Uno, C. Schwanda, D. Cinabro, V. Gaur, C. Kiesling, M. Masuda, T. V. Dong, P. K. Resmi, J. Libby, H. Hayashii, Dipak Kumar Sahoo, Luka Santelj, P. Pakhlov, K. Senyo, K. Cho, D. M. Asner, K. Hayasaka, G. Varner, M. T. Prim, Takeo Kawasaki, Shoichi Watanuki, S. Pardi, K. Inami, A. Garmash, K. Trabelsi, Peter Kodys, W. W. Jacobs, M. Uchida, Tagir Aushev, V. Zhukova, Y. Onuki, M. Merola, A. B. Kaliyar, Y. B. Li, Leo Piilonen, V.M. Aulchenko, S. Di Carlo, G. Karyan, V. Bhardwaj, H. K. Moon, A. M. Bakich, R. Itoh, C. Beleño, A. Vossen, K. Nishimura, N. Gabyshev, D. Červenkov, Rocky Bala Garg, B. Golob, Y. Choi, K. J. Nath, K. Lieret, M. Nayak, E. Solovieva, S. Nishida, Y. Sakai, A. Chen, G. B. Mohanty, D. Joffe, M. Takizawa, M. Röhrken, V. Vorobyev, E. Won, Kiyoshi Tanida, Z. Doležal, K. T. Kim, X. L. Wang, R. Van Tonder, H. Park, A. Bozek, B. Bhuyan, V. Savinov, K. Huang, H. Ono, and R. Mizuk
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Unitarity, Meson, 010308 nuclear & particles physics, Resonance, 01 natural sciences, Flavor, Amplitude ratio, Amplitude, angle, CP, 0103 physical sciences, e+-e, CP violation, CKM, ddc:530, gamma, violation, 010306 general physics, Experiments
Abstract: We present the first model-independent measurement of the CKM unitarity triangle angle ϕ 3 using B ± → D( $$ {K}_{\mathrm{S}}^0 $$ K S 0 π + π − π 0) K ± decays, where D indicates either a D 0 or $$ \overline{D} $$ D ¯ 0 meson. Measurements of the strong-phase difference of the D → $$ {K}_{\mathrm{S}}^0 $$ K S 0 π + π − π 0 amplitude obtained from CLEO-c data are used as input. This analysis is based on the full Belle data set of 772 × 106 B $$ \overline{B} $$ B ¯ events collected at the Υ(4S) resonance. We obtain ϕ 3 = ( $$ {5.7}_{-8.8}^{+10.2} $$ 5.7 − 8.8 + 10.2 ±3.5±5.7) ° and the suppressed amplitude ratio r B = 0.323±0.147±0.023±0.051. Here the first uncertainty is statistical, the second is the experimental systematic, and the third is due to the precision of the strong-phase parameters measured from CLEO-c data. The 95% confidence interval on ϕ 3 is (−29.7, 109.5) ° , which is consistent with the current world average.
Published: 2019

49. 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

50. Measurement of the decays Λc→Σππ at Belle

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

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