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1. Measurement of the KS → πeν branching fraction with the KLOE experiment

Author: The KLOE-2 collaboration, D. Babusci, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwiński, G. D’Agostini, R. D’Amico, E. Danè, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, E. Diociaiuti, D. Domenici, A. D’Uffizi, G. Fantini, A. Gajos, S. Gamrat, P. Gauzzi, S. Giovannella, E. Graziani, X. Kang, A. Kupsc, G. Mandaglio, M. Martini, S. Miscetti, P. Moskal, A. Passeri, E. Perez del Rio, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, E. P. Solodov, W. Wiślicki, and M. Wolke
Subjects: Branching fraction, e +-e − Experiments, Flavour Physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract The ratio R $$ \mathcal{R} $$ = Γ(K S → πeν)/Γ(K S → π + π − ) has been measured with a sample of 300 million K S mesons produced in ϕ → K L K S decays recorded by the KLOE experiment at the DAΦNE e + e − collider. K S → πeν events are selected by a boosted decision tree built with kinematic variables and time-of-flight measurements. Data control samples of K L → πeν decays are used to evaluate signal selection efficiencies. With 49647±316 signal events we measure R $$ \mathcal{R} $$ = (1.0421 ± 0.0066stat ± 0.0075syst) × 10 −3. The combination with our previous measurement gives R $$ \mathcal{R} $$ = (1.0338 ± 0.0054stat ± 0.0064syst) × 10 −3. From this value we derive the branching fraction B $$ \mathcal{B} $$ (K S → πeν) = (7.153 ± 0.037stat ± 0.044syst) × 10 −4 and f +(0)|V us | = 0.2170 ± 0.009.
Published: 2023
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2. Precision tests of quantum mechanics and CPT $$ \mathcal{CPT} $$ symmetry with entangled neutral kaons at KLOE

Author: The KLOE-2 collaboration, D. Babusci, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwiński, G. D’Agostini, R. D’Amico, E. Danè, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, E. Diociaiuti, D. Domenici, A. D’Uffizi, A. Fantini, G. Fantini, P. Fermani, S. Fiore, A. Gajos, P. Gauzzi, S. Giovannella, E. Graziani, V. L. Ivanov, T. Johansson, X. Kang, D. Kisielewska-Kamińska, E. A. Kozyrev, W. Krzemien, A. Kupsc, P. A. Lukin, G. Mandaglio, M. Martini, R. Messi, S. Miscetti, D. Moricciani, P. Moskal, A. Passeri, V. Patera, E. Perez del Rio, P. Santangelo, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, E. P. Solodov, L. Tortora, G. Venanzoni, W. Wiślicki, and M. Wolke
Subjects: Beyond Standard Model, e +-e − Experiments, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract The quantum interference between the decays of entangled neutral kaons is studied in the process ϕ → KSKL → π + π − π + π − , which exhibits the characteristic Einstein-Podolsky-Rosen correlations that prevent both kaons to decay into π + π − at the same time. This constitutes a very powerful tool for testing at the utmost precision the quantum coherence of the entangled kaon pair state, and to search for tiny decoherence and CPT $$ \mathcal{CPT} $$ violation effects, which may be justified in a quantum gravity framework. The analysed data sample was collected with the KLOE detector at DAΦNE, the Frascati ϕ-factory, and corresponds to an integrated luminosity of about 1.7 fb −1, i.e. to about 1.7 × 109 ϕ → KSKL decays produced. From the fit of the observed ∆t distribution, being ∆t the difference of the kaon decay times, the decoherence and CPT $$ \mathcal{CPT} $$ violation parameters of various phenomenological models are measured with a largely improved accuracy with respect to previous analyses. The results are consistent with no deviation from quantum mechanics and CPT $$ \mathcal{CPT} $$ symmetry, while for some parameters the precision reaches the interesting level at which — in the most optimistic scenarios — quantum gravity effects might show up. They provide the most stringent limits up to date on the considered models.
Published: 2022
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3. Upper limit on the η → π + π − branching fraction with the KLOE experiment

Author: The KLOE-2 collaboration, D. Babusci, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwiński, G. D’Agostini, E. Danè, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, D. Domenici, A. D’Uffizi, A. Fantini, P. Fermani, S. Fiore, A. Gajos, P. Gauzzi, S. Giovannella, E. Graziani, V. L. Ivanov, T. Johansson, X. Kang, D. Kisielewska-Kamińska, E. A. Kozyrev, W. Krzemien, A. Kupsc, P. A. Lukin, G. Mandaglio, M. Martini, R. Messi, S. Miscetti, D. Moricciani, P. Moskal, S. Parzych, A. Passeri, V. Patera, E. Perez del Rio, P. Santangelo, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, E. P. Solodov, L. Tortora, G. Venanzoni, W. Wiślicki, and M. Wolke
Subjects: Branching fraction, CP violation, e +-e − Experiments, Rare decay, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract Based on an integrated luminosity of 1.61 fb −1 e + e − collision data collected with the KLOE detector at DAΦNE, the Frascati ϕ-factory, a search for the P- and CP-violating decay η → π + π − has been performed. Radiative ϕ → ηγ decay is exploited to access the η mesons. No signal is observed in the π + π − invariant mass spectrum, and the upper limit on the branching fraction at 90% confidence level is determined to be ℬ(η → π + π − ) < 4.9 × 10 −6, which is approximately three times smaller than the previous KLOE result. From the combination of these two measurements we get ℬ(η → π + π − ) < 4.4 × 10 −6 at 90% confidence level.
Published: 2020
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4. Measurement of the e+e − → ηπ + π − cross section with the CMD-3 detector at the VEPP-2000 collider

Author: CMD-3 collaboration, S. S. Gribanov, A. S. Popov, R. R. Akhmetshin, A. N. Amirkhanov, A. V. Anisenkov, V. M. Aulchenko, V. Sh. Banzarov, N. S. Bashtovoy, D. E. Berkaev, A. E. Bondar, A. V. Bragin, S. I. Eidelman, D. A. Epifanov, L. B. Epshteyn, A. L. Erofeev, G. V. Fedotovich, S. E. Gayazov, F. J. Grancagnolo, A. A. Grebenuk, D. N. Grigoriev, F. V. Ignatov, V. L. Ivanov, S. V. Karpov, V. F. Kazanin, A. N. Kirpotin, I. A. Koop, A. A. Korobov, O. A. Kovalenko, A. N. Kozyrev, E. A. Kozyrev, P. P. Krokovny, A. E. Kuzmenko, A. S. Kuzmin, I. B. Logashenko, P. A. Lukin, K. Yu. Mikhailov, V. S. Okhapkin, A. V. Otboev, Yu. N. Pestov, G. P. Razuvaev, Yu. A. Rogovsky, A. A. Ruban, N. M. Ryskulov, A. E. Ryzhenenkov, A. V. Semenov, A. I. Senchenko, Yu. M. Shatunov, P. Yu. Shatunov, V. E. Shebalin, D. N. Shemyakin, B. A. Shwartz, D. B. Shwartz, A. L. Sibidanov, E. P. Solodov, V. M. Titov, A. A. Talyshev, S. S. Tolmachev, A. I. Vorobiov, I. M. Zemlyansky, and Yu. V. Yudin
Subjects: e+-e- Experiments, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract The cross section of the process e + e − → ηπ + π − is measured using the data collected with the CMD-3 detector at the VEPP-2000 collider in the center-of-mass energy range from 1.1 to 2.0 GeV. The decay mode η → γγ is used for η meson reconstruction in the data sample corresponding to an integrated luminosity of 78.3 pb −1. The energy dependence of the e + e − → ηπ + π − cross section is fitted within the framework of vector meson dominance in order to extract the Γ(ρ(1450) → e + e − ) B $$ \mathcal{B} $$ (ρ(1450) → ηπ + π − ) and the Γ(ρ(1700) → e + e − ) B $$ \mathcal{B} $$ (ρ(1700) → ηπ + π − ) products. Based on conservation of vector current, the analyzed data are used to test the relationship between the e + e − → ηπ + π − cross section and the spectral function in τ − → ηπ − π 0 ντ decay. The e + e − → ηπ + π − cross section obtained with the CMD-3 detector is in good agreement with the previous measurements.
Published: 2020
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5. Erratum to: Precision tests of quantum mechanics and CPT $$ \mathcal{CPT} $$ symmetry with entangled neutral kaons at KLOE

Author: The KLOE-2 collaboration, D. Babusci, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwiński, G. D’Agostini, R. D’Amico, E. Danè, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, E. Diociaiuti, D. Domenici, A. D’Uffizi, A. Fantini, G. Fantini, P. Fermani, S. Fiore, A. Gajos, P. Gauzzi, S. Giovannella, E. Graziani, V. L. Ivanov, T. Johansson, X. Kang, D. Kisielewska-Kamińska, E. A. Kozyrev, W. Krzemien, A. Kupsc, P. A. Lukin, G. Mandaglio, M. Martini, R. Messi, S. Miscetti, D. Moricciani, P. Moskal, A. Passeri, V. Patera, E. Perez del Rio, P. Santangelo, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, E. P. Solodov, L. Tortora, G. Venanzoni, W. Wiślicki, and M. Wolke
Subjects: Beyond Standard Model, e+-e- Experiments, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Published: 2022
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6. Measurement of the charge asymmetry for the KS → πeν decay and test of CPT symmetry with the KLOE detector

Author: The KLOE-2 collaboration, A. Anastasi, D. Babusci, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, B. Cao, G. Capon, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwinski, G. D’Agostini, E. Danè, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, D. Domenici, A. D’Uffizi, A. Fantini, G. Fantini, P. Fermani, S. Fiore, A. Gajos, P. Gauzzi, S. Giovannella, E. Graziani, V. L. Ivanov, T. Johansson, X. Kang, D. Kisielewska-Kaminska, E. A. Kozyrev, W. Krzemien, A. Kupsć, S. Loffredo, P. A. Lukin, G. Mandaglio, M. Martini, R. Messi, S. Miscetti, D. Moricciani, P. Moskal, A. Passeri, V. Patera, E. Perez del Rio, N. Raha, P. Santangelo, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, E. P. Solodov, L. Tortora, G. Venanzoni, W. Wislicki, and M. Wolke
Subjects: CP violation, e+-e- Experiments, Flavor physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract Using 1.63 fb−1 of integrated luminosity collected by the KLOE experiment about 7 × 104 K S → π ± e ∓ ν decays have been reconstructed. The measured value of the charge asymmetry for this decay is A S = (−4.9 ± 5.7stat ± 2.6syst) × 10−3, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives A S = (−3.8 ± 5.0stat ± 2.6syst) × 10−3 and, together with the asymmetry of the K L semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance.
Published: 2018
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7. Combination of KLOE σ (e + e − → π+π−γ(γ)) measurements and determination of a μ π + π − $$ {a}_{\mu}^{\pi^{+}{\pi}^{-}} $$ in the energy range 0.10 < s < 0.95 GeV2

Author: The KLOE-2 collaboration, A. Anastasi, D. Babusci, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwinski, G. D’Agostini, E. Danè, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, D. Domenici, A. D’Uffizi, A. Fantini, G. Fantini, P. Fermani, S. Fiore, A. Gajos, P. Gauzzi, S. Giovannella, E. Graziani, V. L. Ivanov, T. Johansson, X. Kang, D. Kisielewska-Kaminska, E. A. Kozyrev, W. Krzemien, A. Kupsc, S. Loffredo, P. A. Lukin, G. Mandaglio, M. Martini, R. Messi, S. Miscetti, G. Morello, D. Moricciani, P. Moskal, A. Passeri, V. Patera, E. Perez del Rio, N. Raha, P. Santangelo, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, E. P. Solodov, L. Tortora, G. Venanzoni, W. Wislicki, M. Wolke, A. Keshavarzi, S.E. Müller, and T. Teubner
Subjects: e+-e- Experiments, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract: Abstract The three precision measurements of the cross section σ(e + e − → π + π −γ(γ)) using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of these measurements requires covariance matrices that fully describe the correlations. We present the construction of these covariance matrices and use them to determine a combined KLOE measurement for σ(e + e − → π + π −γ(γ)). We find, from this combination, a two-pion contribution to the muon magnetic anomaly in the energy range 0.10 < s < 0.95 GeV2 of a μ π + π − = 489.8 ± 1.7 stat ± 4.8 s y s × 10 − 10 $$ {a}_{\mu}^{\pi^{+}{\pi}^{-}}=\left(489.8\pm {1.7}_{\mathrm{stat}}\pm {4.8}_{\mathrm{sys}}\right)\times {10}^{-10} $$ . Data vectors and covariance matrices are available at http://www.lnf.infn.it/kloe/ppg/ ppg_2017/ppg_2017.html .
Published: 2018
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8. The anomalous magnetic moment of the muon in the Standard Model

Author: T. Kinoshita, B.A. Shwartz, Christian S. Fischer, V. Gülpers, Bogdan Malaescu, M.N. Achasov, Vladyslav Pauk, Carleton DeTar, Martin Hoferichter, Thomas Teubner, Fred Jegerlehner, I. Caprini, Johan Bijnens, Konstantin Ottnad, Renwick J. Hudspith, V. P. Druzhinin, Esther Weil, D. W. Hertzog, D. Stöckinger, J. Charles, R. S. Van de Water, Maarten Golterman, Stefan E. Müller, Gilberto Colangelo, Nuno Cardoso, D. Nomura, C. M. Carloni Calame, Jonna Koponen, Taku Izubuchi, A. Denig, Santiago Peris, Franziska Hagelstein, Jeremy Green, Andreas Nyffeler, K. Yu. Todyshev, C. F. Redmer, M. Della Morte, Zhiqing Zhang, B. L. Roberts, F. Curciarello, Cesareo A. Dominguez, S. Holz, Richard Williams, Laetitia Laub, Hartmut Wittig, Henryk Czyz, B.-L. Hoid, Antoine Gérardin, S.I. Eidelman, Daniel Mohler, I. Danilkin, Bastian Kubis, E. P. Solodov, Elvira Gamiz, E. de Rafael, H. Stöckinger-Kim, Gregorio Herdoiza, J. Monnard, M. Davier, T. San José, Laurent Lellouch, T. Aoyama, Aida X. El-Khadra, Nils Hermansson-Truedsson, Steven Gottlieb, I.B. Logashenko, Antonio Rodríguez-Sánchez, Marina Marinkovic, M. Bruno, Tom Blum, Nils Asmussen, Luchang Jin, A. Hoecker, M. Fael, Peter Stoffer, Aaron S. Meyer, K. Raya, T. Mibe, D. Giusti, M. Benayoun, Jack Laiho, Kim Maltman, K. Miura, Marco Cè, Pablo Roig, Craig McNeile, S. I. Serednyakov, G. von Hippel, A. V. Nesterenko, F. Ignatov, M. Knecht, D. Hatton, Christoph Lehner, Pere Masjuan, A. Vaquero Avilés-Casco, Massimiliano Procura, A. Kupich, A. E. Radzhabov, Silvano Simula, Vladimir Pascalutsa, M. Nio, A. Keshavarzi, A. Bashir, Marc Vanderhaeghen, Antonin Portelli, Andreas S. Kronfeld, M. Passera, E. Perez del Rio, W. J. Marciano, Z. Gelzer, S. Leupold, E.-H. Chao, Pablo Sanchez-Puertas, S. Guellati-Khelifa, Christine Davies, Ethan T. Neil, Masashi Hayakawa, B. Hörz, A. E. Dorokhov, Gernot Eichmann, Andreas Crivellin, Robert L. Sugar, G. Venanzoni, P. B. Mackenzie, O. Deineka, A. S. Zhevlakov, A. Kupść, Jonas Wilhelm, Harvey B. Meyer, Arkady Vainshtein, Bipasha Chakraborty, Andreas Risch, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), 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), Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Kastler Brossel (LKB [Collège de France]), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Aoyama, T, Asmussen, N, Benayoun, M, Bijnens, J, Blum, T, Bruno, M, Caprini, I, Carloni Calame, C, Ce, M, Colangelo, G, Curciarello, F, Czyz, H, Danilkin, I, Davier, M, Davies, C, Della Morte, M, Eidelman, S, El-Khadra, A, Gerardin, A, Giusti, D, Golterman, M, Gottlieb, S, Gulpers, V, Hagelstein, F, Hayakawa, M, Herdoiza, G, Hertzog, D, Hoecker, A, Hoferichter, M, Hoid, B, Hudspith, R, Ignatov, F, Izubuchi, T, Jegerlehner, F, Jin, L, Keshavarzi, A, Kinoshita, T, Kubis, B, Kupich, A, Kupsc, A, Laub, L, Lehner, C, Lellouch, L, Logashenko, I, Malaescu, B, Maltman, K, Marinkovic, M, Masjuan, P, Meyer, A, Meyer, H, Mibe, T, Miura, K, Muller, S, Nio, M, Nomura, D, Nyffeler, A, Pascalutsa, V, Passera, M, Perez del Rio, E, Peris, S, Portelli, A, Procura, M, Redmer, C, Roberts, B, Sanchez-Puertas, P, Serednyakov, S, Shwartz, B, Simula, S, Stockinger, D, Stockinger-Kim, H, Stoffer, P, Teubner, T, Van de Water, R, Vanderhaeghen, M, Venanzoni, G, von Hippel, G, Wittig, H, Zhang, Z, Achasov, M, Bashir, A, Cardoso, N, Chakraborty, B, Chao, E, Charles, J, Crivellin, A, Deineka, O, Denig, A, Detar, C, Dominguez, C, Dorokhov, A, Druzhinin, V, Eichmann, G, Fael, M, Fischer, C, Gamiz, E, Gelzer, Z, Green, J, Guellati-Khelifa, S, Hatton, D, Hermansson-Truedsson, N, Holz, S, Horz, B, Knecht, M, Koponen, J, Kronfeld, A, Laiho, J, Leupold, S, Mackenzie, P, Marciano, W, Mcneile, C, Mohler, D, Monnard, J, Neil, E, Nesterenko, A, Ottnad, K, Pauk, V, Radzhabov, A, de Rafael, E, Raya, K, Risch, A, Rodriguez-Sanchez, A, Roig, P, San Jose, T, Solodov, E, Sugar, R, Todyshev, K, Vainshtein, A, Vaquero Aviles-Casco, A, Weil, E, Wilhelm, J, Williams, R, Zhevlakov, A, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Collège de France (CdF (institution))
Subjects: Standard Model, Nuclear Theory, magnetic, higher-order, Physics beyond the Standard Model, General Physics and Astronomy, nucl-ex, 01 natural sciences, High Energy Physics - Experiment, Subatomär fysik, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Subatomic Physics, quantum electrodynamics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Vacuum polarization, Nuclear Experiment (nucl-ex), Nuclear Experiment, fundamental constant: fine structure, Physics, Quantum chromodynamics, QED, Anomalous magnetic dipole moment, new physics, J-PARC Lab, High Energy Physics - Lattice (hep-lat), Electroweak interaction, lattice field theory, Particle Physics - Lattice, hep-ph, Observable, High Energy Physics - Phenomenology, Nuclear Physics - Theory, Particle Physics - Experiment, Particle physics, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], nucl-th, 530 Physics, dispersion relation, g-2, Lattice field theory, FOS: Physical sciences, hep-lat, nonperturbative, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Muon magnetic moment, Nuclear Theory (nucl-th), High Energy Physics - Lattice, muon, quantum chromodynamics, 0103 physical sciences, ddc:530, Nuclear Physics - Experiment, 010306 general physics, activity report, perturbation theory, Particle Physics - Phenomenology, Muon, muon: magnetic moment, electroweak interaction, [PHYS.HLAT]Physics [physics]/High Energy Physics - Lattice [hep-lat], hep-ex, 010308 nuclear & particles physics, vacuum polarization: hadronic, High Energy Physics::Phenomenology, photon photon: scattering, anomalous magnetic moment, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment
Abstract: We are very grateful to the Fermilab Directorate and the Fermilab Theoretical Physics Department for their financial and logistical support of the first workshop of the Muon g -2 Theory Initiative (held near Fermilab in June 2017) [123], which was crucial for its success, and indeed for the successful start of the Initiative. Financial support for this workshop was also provided by the Fermilab Distinguished Scholars program, the Universities Research Association through a URA Visiting Scholar award, the Riken Brookhaven Research Center, and the Japan Society for the Promotion of Science under Grant No. KAKEHNHI-17H02906. We thank Shoji Hashimoto, Toru Iijima, Takashi Kaneko, and Shohei Nishida for hosting the HVP workshop at KEK [124] and the KEK Theory Center and the U.S.-Japan Science and Technology Cooperation Program in High Energy Physics for providing logistical and financial support. The HLbL workshop at the University of Connecticut [125] was hosted by the University of Connecticut Physics Department. We also gratefully acknowledge support for the second plenary workshop in Mainz [126] from the Deutsche Forschungsgemeinschaft via the Cluster of Excellence "Precision Physics, Fundamental Interactions and Structure of Matter'' (PRISMA), the Collaborative Research Centre "The low-energy frontier of the Standard Model'' (SFB 1044), as well as the Helmholtz Institute Mainz. And finally, we thank the Institute for Nuclear Theory at the University of Washington for hosting the third plenary workshop [127] and for its kind hospitality and stimulating research environment. This workshop was supported in part by the U.S. Department of Energy, Office of Science, under Award Nos. DE-FG02-00ER41132, DE-SC0020106, and by the U.S.-Japan Science and Technology Cooperation Program in High Energy Physics. This review benefited from discussions with O. Cata, N. Christ, L.Y. Dai, H. Davoudiasl, S. Fayer, S. Ganguly, A. Gasparian, S. Hashimoto, T. Iijima, K. Kampf, D. Kawall, I. Larin, Z. Pagel, M. Petschlies, A. Rebhan, K. Schilcher, K. Shimomura, E. Shintani, D. Steffen, S. Tracz, C. Tu, and T. Yamazaki. The work in this paper was supported by CNRS, by Conacyt (Ciencia Basica 2015) under Grant No. 250628, by CONACyT-Mexico under Grant No. CB2014-22117, by Coordinacion de la Investigacion Cientifica (CIC-UMSNH) under Grant No. 4.10, by Danmarks Frie Forskningsfond under Grant No. 8021-00122B, by Deutsche Forschungsgemeinschaft Collaborative Research Centers CRC 1044, CRC 1044 -204404729, CRC 110, and under Grant No. HI 2048/1-1, Prisma Cluster for Excellence PRISMA+ EXC2118/1, STO/876/6-1, by European Research Council under the European Union's Horizon 2020 research and innovation programme under Grant Agreement Nos. 668679, 757646, 771971-SIMDAMA, 813942, by the European Union H2020-MSCA-COFUND2016 under Grant No. 754510, by the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant Agreement No. 843134, by European Union EuroPLEx Grant H2020-MSCA-ITN-2018-813942, by European Union STRONG 2020 project under Grant Agreement No. 824093, by the Excellence Initiative of Aix-Marseille University -A*MIDEX, a French "Investissements d'Avenir" program, through the Chaire d'Excellence program and the OCEVU Laboratoire d'Excellence (ANR-11-LABX-0060), by the Fermilab Distinguished Scholars program, by Fondo SEP-Cinvestav under Grant No. 142, Fundacao para a Ciencia e a Tecnologia under Grant No. SFRH/BPD/109443/2015, by Generalitat de Catalunya under Grant No. 2017SGR1069, by the Helmholtz Association (German Federal Ministry of Education and Research), by the Helmholtz-Institut Mainz, by the Istituto Nazionale di Fisica Nucleare (INFN), by the Isaac Newton Trust, by the Japan Society for the Promotion of Science under Grant Nos. KAKENHI-15H05742, 16K05317, 16K05323, 16K05338, 17H01133, 17H02906, 18H05226, 19K21872, 20K03926, 20K03960, by Junta de Andalucia under Grant No. A-FQM-467-UGR18, by KEK, by Ministerio de Ciencia e Innovacion under Grant No. CICYTFEDER-FPA2017-86989-P, by Ministerio de Industria, Economia y Competitividad under Grant Nos. FPA2016-78220-C3-3-P, FPA2017-86989-P, PGC2018-094857-B-I00, SEV-2016-0588, SEV-2016-0597, by Laboratoires d'Excellence FIRST-TF grants, a French "Investissements d'Avenir'' program, by the Ministry of Science and Higher Education of the Russian Federation under Grant Agreement No. 14.W03.31.0026, by the National Research Foundation of South Africa, by the Natural Sciences and Engineering Research Council of Canada, by the Portuguese Science Foundation (FCT) Investigator Grant IF/00898/2015, by the Romanian Ministry of Education and Research under Grant No. PN19060101, by the Russian Science Foundation under Grant No. RSF 18-12-00128, by the Secretaria d'Universitats i Recerca del Departament d'Economia i Coneixement de la Generalitat de Catalunya under Grant No. 2017 SGR 1069, by the Swedish Research Council under Grant Nos. 2016-05996, 2019-03779, by the Swiss National Science Foundation under Grant Nos. PP00P2_176884, PCEFP2_181117, by The Leverhulme Trust under Grant No. ECF-2019-223, by the UK Science and Technology Facilities Council (STFC) under Grant Nos. ST/N504130/1, ST/P000290/1, ST/P00055X/1, ST/P000630/1, ST/P000711/1, ST/P000746/1, ST/S000879/1, ST/S000925/1, by the U.S. Department of Energy, Office of Science, Office of High Energy Physics under Award Nos. DE-SC0009919, DE-SC0009998, DE-SC0010005, DE-SC0010120, DE-SC0010339, DE-SC0012391, DE-SC0012704, DE-SC0013682, DE-SC0013895, DE-SC0015655, by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Award Nos. DE-AC02-05CH11231, DE-FG02-00ER41132, DE-FG02-97ER41020, by the U.S.-Japan Science and Technology Cooperation Program in High Energy Physics, "Incubation Platform for Intensity Frontier", by the U.S. National Science Foundation under Grant Nos. NSF-PHY-1316222, PHY14-14614, PHY17-19626, and PHY19-23131, and by the U.S. National Institute of Standards and Technology (NIST) Precision Measurement Grant Program under Award No. 60NANB16D271. This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics., We review the present status of the Standard Model calculation of the anomalous magnetic moment of the muon. This is performed in a perturbative expansion in the fine-structure constant and is broken down into pure QED, electroweak, and hadronic contributions. The pure QED contribution is by far the largest and has been evaluated up to and including with negligible numerical uncertainty. The electroweak contribution is suppressed by and only shows up at the level of the seventh significant digit. It has been evaluated up to two loops and is known to better than one percent. Hadronic contributions are the most difficult to calculate and are responsible for almost all of the theoretical uncertainty. The leading hadronic contribution appears at and is due to hadronic vacuum polarization, whereas at the hadronic light-by-light scattering contribution appears. Given the low characteristic scale of this observable, these contributions have to be calculated with nonperturbative methods, in particular, dispersion relations and the lattice approach to QCD. The largest part of this review is dedicated to a detailed account of recent efforts to improve the calculation of these two contributions with either a data-driven, dispersive approach, or a first-principle, lattice-QCD approach. The final result reads and is smaller than the Brookhaven measurement by 3.7. The experimental uncertainty will soon be reduced by up to a factor four by the new experiment currently running at Fermilab, and also by the future J-PARC experiment. This and the prospects to further reduce the theoretical uncertainty in the near future – which are also discussed here – make this quantity one of the most promising places to look for evidence of new physics., Fermilab Directorate, Fermilab Theoretical Physics Department, Fermilab Distinguished Scholars program, Universities Research Association through a URA Visiting Scholar award, Riken Brookhaven Research Center, Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science KAKEHNHI-17H02906 KAKENHI-15H05742 16K05317 16K05323 16K05338 17H01133 17H02906 18H05226 19K21872 20K03926 20K03960, High Energy Accelerator Research Organization (KEK), U.S.-Japan Science and Technology Cooperation Program in High Energy Physics, Deutsche Forschungsgemeinschaft via the Cluster of Excellence "Precision Physics, Fundamental Interactions and Structure of Matter'' (PRISMA), Collaborative Research Centre "The low-energy frontier of the Standard Model'' SFB 1044, Helmholtz Institute Mainz, United States Department of Energy (DOE) DE-FG02-00ER41132 DE-SC0020106, Centre National de la Recherche Scientifique (CNRS), Conacyt (Ciencia Basica 2015) 250628, Consejo Nacional de Ciencia y Tecnologia (CONACyT) CB2014-22117, Coordinacion de la Investigacion Cientifica (CIC-UMSNH) 4.10, Danmarks Frie Forskningsfond 8021-00122B, German Research Foundation (DFG) CRC 1044 CRC 1044 -204404729 CRC 110 HI 2048/1-1, Prisma Cluster for Excellence PRISMA+ EXC2118/1 STO/876/6-1, European Research Council (ERC) 668679 757646 771971-SIMDAMA 813942, European Union (EU) 754510, European Union (EU) 843134, European Union EuroPLEx Grant H2020-MSCA-ITN-2018-813942, European Union STRONG 2020 project 824093, French National Research Agency (ANR), OCEVU Laboratoire d'Excellence ANR-11-LABX-0060, Fondo SEP-Cinvestav 142, Portuguese Foundation for Science and Technology SFRH/BPD/109443/2015, Generalitat de Catalunya 2017SGR1069, Helmholtz Association (German Federal Ministry of Education and Research), Istituto Nazionale di Fisica Nucleare (INFN), Isaac Newton Trust, Junta de Andalucia A-FQM-467-UGR18, Instituto de Salud Carlos III Spanish Government CICYTFEDER-FPA2017-86989-P, Ministerio de Industria, Economia y Competitividad FPA2016-78220-C3-3-P FPA2017-86989-P PGC2018-094857-B-I00 SEV-2016-0588 SEV-2016-0597, Laboratoires d'Excellence FIRST-TF grants, Ministry of Science and Higher Education of the Russian Federation 14.W03.31.0026, National Research Foundation - South Africa, Natural Sciences and Engineering Research Council of Canada (NSERC) CGIAR, Portuguese Science Foundation (FCT) Investigator Grant IF/00898/2015, Romanian Ministry of Education and Research PN19060101, Russian Science Foundation (RSF) RSF 18-12-00128, Generalitat de Catalunya 2017 SGR 1069, Swedish Research Council 2016-05996 2019-03779, Swiss National Science Foundation (SNSF) PP00P2_176884 PCEFP2_181117, Leverhulme Trust ECF-2019-223, UK Research & Innovation (UKRI) Science & Technology Facilities Council (STFC) ST/N504130/1 ST/P000290/1 ST/P00055X/1 ST/P000630/1 ST/P000711/1 ST/P000746/1 ST/S000879/1 ST/S000925/1, United States Department of Energy (DOE) DE-SC0009919 DE-SC0009998 DE-SC0010005 DE-SC0010120 DE-SC0010339 DE-SC0012391 DE-SC0012704 DE-SC0013682 DE-SC0013895 DE-SC0015655, United States Department of Energy (DOE) DE-FG02-00ER41132 DE-AC02-05CH11231 DE-FG02-97ER41020 DE-AC02-07CH11359, U.S.-Japan Science and Technology Cooperation Program in High Energy Physics, "Incubation Platform for Intensity Frontier", National Science Foundation (NSF) NSF-PHY-1316222 PHY14-14614 PHY17-19626 PHY19-23131, U.S. National Institute of Standards and Technology (NIST) Precision Measurement Grant 60NANB16D271
Published: 2020

9. Upper limit on the η → π + π − branching fraction with the KLOE experiment

Author: S. Miscetti, E. P. Solodov, A. Di Cicco, E. Perez del Rio, Tord Johansson, R. Messi, D. Domenici, W. Wislicki, V. De Leo, S. Giovannella, S. Parzych, Marco Schioppa, F. Bossi, Aleksander Gajos, M. Martini, Filippo Ceradini, Magnus Wolke, P. Gauzzi, B. Cao, A. D'Uffizi, A. De Santis, V. L. Ivanov, A. Di Domenico, E. De Lucia, X. Kang, M. Berlowski, Wojciech Krzemien, E. Dané, Michał Silarski, G. Venanzoni, P. Fermani, Eryk Czerwiński, Vincenzo Patera, Andrzej Kupsc, P. Branchini, Paolo Ciambrone, A. Selce, Antonio Budano, A. Fantini, Paolo Santangelo, P.A. Lukin, D. Kisielewska-Kamińska, C. Bloise, S. Fiore, E. Graziani, D. Babusci, D. Moricciani, E.A. Kozyrev, P. De Simone, Giuseppe Mandaglio, L. Tortora, Florin Sirghi, Paweł Moskal, A. Passeri, F. Curciarello, G. D'Agostini, Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D'Agostini, G., Dane, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, A., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Parzych, S., Passeri, A., Patera, V., Perez del Rio, E., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., and Wolke, M.
Subjects: Nuclear and High Energy Physics, Meson, +, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Subatomär fysik, Experiment, 0103 physical sciences, Subatomic Physics, Radiative transfer, Invariant mass, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Limit (mathematics), 010306 general physics, Nuclear Experiment, Settore FIS/01, Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, Branching fraction, e, e(+)-e(-) Experiments, −, e +-e − Experiments, CP violation, Experiments, Rare decay, lcsh:QC770-798, High Energy Physics::Experiment
Abstract: Based on an integrated luminosity of 1.61 fb$^{-1}$ $e^+e^-$ collision data collected with the KLOE detector at DA$\Phi$NE, the Frascati $\phi$-factory, a search for the $P$- and $CP$-violating decay $\eta\to\pi^{+}\pi^{-}$ has been performed. Radiative $\phi\to\eta\gamma$ decay is exploited to access the $\eta$ mesons. No signal is observed in the $\pi^{+}\pi^{-}$ invariant mass spectrum, and the upper limit on the branching fraction at 90\% confidence level is determined to be ${\mathcal B}(\eta\to\pi^{+}\pi^{-}), Comment: 11 pages, 3 figures
Published: 2020

10. Search for an Axionlike Particle in B Meson Decays

Author: J P, Lees, V, Poireau, V, Tisserand, E, Grauges, A, Palano, G, Eigen, D N, Brown, Yu G, Kolomensky, M, Fritsch, H, Koch, T, Schroeder, R, Cheaib, C, Hearty, T S, Mattison, J A, McKenna, R Y, So, V E, Blinov, A R, Buzykaev, V P, Druzhinin, V B, Golubev, E A, Kozyrev, E A, Kravchenko, A P, Onuchin, S I, Serednyakov, Yu I, Skovpen, E P, Solodov, K Yu, Todyshev, A J, Lankford, B, Dey, J W, Gary, O, Long, A M, Eisner, W S, Lockman, W, Panduro Vazquez, D S, Chao, C H, Cheng, B, Echenard, K T, Flood, D G, Hitlin, J, Kim, Y, Li, D X, Lin, S, Middleton, T S, Miyashita, P, Ongmongkolkul, J, Oyang, F C, Porter, M, Röhrken, Z, Huard, B T, Meadows, B G, Pushpawela, M D, Sokoloff, L, Sun, J G, Smith, S R, Wagner, D, Bernard, M, Verderi, D, Bettoni, C, Bozzi, R, Calabrese, G, Cibinetto, E, Fioravanti, I, Garzia, E, Luppi, V, Santoro, A, Calcaterra, R, de Sangro, G, Finocchiaro, S, Martellotti, P, Patteri, I M, Peruzzi, M, Piccolo, M, Rotondo, A, Zallo, S, Passaggio, C, Patrignani, I, Flood, N, Nguyen, B J, Shuve, H M, Lacker, B, Bhuyan, U, Mallik, C, Chen, J, Cochran, S, Prell, A V, Gritsan, N, Arnaud, M, Davier, F, Le Diberder, A M, Lutz, G, Wormser, D J, Lange, D M, Wright, J P, Coleman, E, Gabathuler, D E, Hutchcroft, D J, Payne, C, Touramanis, A J, Bevan, F, Di Lodovico, R, Sacco, G, Cowan, Sw, Banerjee, C L, Davis, A G, Denig, W, Gradl, K, Griessinger, A, Hafner, K R, Schubert, R J, Barlow, G D, Lafferty, R, Cenci, A, Jawahery, D A, Roberts, R, Cowan, S H, Robertson, R M, Seddon, N, Neri, F, Palombo, L, Cremaldi, R, Godang, D J, Summers, P, Taras, G, De Nardo, C, Sciacca, G, Raven, C P, Jessop, J M, LoSecco, K, Honscheid, R, Kass, A, Gaz, M, Margoni, M, Posocco, G, Simi, F, Simonetto, R, Stroili, S, Akar, E, Ben-Haim, M, Bomben, G R, Bonneaud, G, Calderini, J, Chauveau, G, Marchiori, J, Ocariz, M, Biasini, E, Manoni, A, Rossi, G, Batignani, S, Bettarini, M, Carpinelli, G, Casarosa, M, Chrzaszcz, M, De Nuccio, F, Forti, M A, Giorgi, A, Lusiani, B, Oberhof, E, Paoloni, M, Rama, G, Rizzo, J J, Walsh, L, Zani, A J S, Smith, F, Anulli, R, Faccini, F, Ferrarotto, F, Ferroni, A, Pilloni, G, Piredda, C, Bünger, S, Dittrich, O, Grünberg, M, Heß, T, Leddig, C, Voß, R, Waldi, T, Adye, F F, Wilson, S, Emery, G, Vasseur, D, Aston, C, Cartaro, M R, Convery, J, Dorfan, W, Dunwoodie, M, Ebert, R C, Field, B G, Fulsom, M T, Graham, C, Hast, W R, Innes, P, Kim, D W G S, Leith, S, Luitz, D B, MacFarlane, D R, Muller, H, Neal, B N, Ratcliff, A, Roodman, M K, Sullivan, J, Va'vra, W J, Wisniewski, M V, Purohit, J R, Wilson, A, Randle-Conde, S J, Sekula, H, Ahmed, N, Tasneem, M, Bellis, P R, Burchat, E M T, Puccio, M S, Alam, J A, Ernst, R, Gorodeisky, N, Guttman, D R, Peimer, A, Soffer, S M, Spanier, J L, Ritchie, R F, Schwitters, J M, Izen, X C, Lou, F, Bianchi, F, De Mori, A, Filippi, D, Gamba, L, Lanceri, L, Vitale, F, Martinez-Vidal, A, Oyanguren, J, Albert, A, Beaulieu, F U, Bernlochner, G J, King, R, Kowalewski, T, Lueck, C, Miller, I M, Nugent, J M, Roney, R J, Sobie, T J, Gershon, P F, Harrison, T E, Latham, R, Prepost, S L, Wu, Lees, J, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, D, Kolomensky, Y, Fritsch, M, Koch, H, Schroeder, T, Cheaib, R, Hearty, C, Mattison, T, Mckenna, J, So, R, Blinov, V, Buzykaev, A, Druzhinin, V, Golubev, V, Kozyrev, E, Kravchenko, E, Onuchin, A, Serednyakov, S, Skovpen, Y, Solodov, E, Todyshev, K, Lankford, A, Dey, B, Gary, J, Long, O, Eisner, A, Lockman, W, Panduro Vazquez, W, Chao, D, Cheng, C, Echenard, B, Flood, K, Hitlin, D, Kim, J, Li, Y, Lin, D, Middleton, S, Miyashita, T, Ongmongkolkul, P, Oyang, J, Porter, F, Röhrken, M, Huard, Z, Meadows, B, Pushpawela, B, Sokoloff, M, Sun, L, Smith, J, Wagner, S, Bernard, D, Verderi, M, Bettoni, D, Bozzi, C, Calabrese, R, Cibinetto, G, Fioravanti, E, Garzia, I, Luppi, E, Santoro, V, Calcaterra, A, de Sangro, R, Finocchiaro, G, Martellotti, S, Patteri, P, Peruzzi, I, Piccolo, M, Rotondo, M, Zallo, A, Passaggio, S, Patrignani, C, Flood, I, Nguyen, N, Shuve, B, Lacker, H, Bhuyan, B, Mallik, U, Chen, C, Cochran, J, Prell, S, Gritsan, A, Arnaud, N, Davier, M, Le Diberder, F, Lutz, A, Wormser, G, Lange, D, Wright, D, Coleman, J, Gabathuler, E, Hutchcroft, D, Payne, D, Touramanis, C, Bevan, A, Di Lodovico, F, Sacco, R, Cowan, G, Banerjee, S, Davis, C, Denig, A, Gradl, W, Griessinger, K, Hafner, A, Schubert, K, Barlow, R, Lafferty, G, Cenci, R, Jawahery, A, Roberts, D, Cowan, R, Robertson, S, Seddon, R, Neri, N, Palombo, F, Cremaldi, L, Godang, R, Summers, D, Taras, P, De Nardo, G, Sciacca, C, Raven, G, Jessop, C, Losecco, J, Honscheid, K, Kass, R, Gaz, A, Margoni, M, Posocco, M, Simi, G, Simonetto, F, Stroili, R, Akar, S, Ben-Haim, E, Bomben, M, Bonneaud, G, Calderini, G, Chauveau, J, Marchiori, G, Ocariz, J, Biasini, M, Manoni, E, Rossi, A, Batignani, G, Bettarini, S, Carpinelli, M, Casarosa, G, Chrzaszcz, M, De Nuccio, M, Forti, F, Giorgi, M, Lusiani, A, Oberhof, B, Paoloni, E, Rama, M, Rizzo, G, Walsh, J, Zani, L, Smith, A, Anulli, F, Faccini, R, Ferrarotto, F, Ferroni, F, Pilloni, A, Piredda, G, Bünger, C, Dittrich, S, Grünberg, O, Heß, M, Leddig, T, Voß, C, Waldi, R, Adye, T, Wilson, F, Emery, S, Vasseur, G, Aston, D, Cartaro, C, Convery, M, Dorfan, J, Dunwoodie, W, Ebert, M, Field, R, Fulsom, B, Graham, M, Hast, C, Innes, W, Kim, P, Leith, D, Luitz, S, Macfarlane, D, Muller, D, Neal, H, Ratcliff, B, Roodman, A, Sullivan, M, Va'Vra, J, Wisniewski, W, Purohit, M, Wilson, J, Randle-Conde, A, Sekula, S, Ahmed, H, Tasneem, N, Bellis, M, Burchat, P, Puccio, E, Alam, M, Ernst, J, Gorodeisky, R, Guttman, N, Peimer, D, Soffer, A, Spanier, S, Ritchie, J, Schwitters, R, Izen, J, Lou, X, Bianchi, F, De Mori, F, Filippi, A, Gamba, D, Lanceri, L, Vitale, L, Martinez-Vidal, F, Oyanguren, A, Albert, J, Beaulieu, A, Bernlochner, F, King, G, Kowalewski, R, Lueck, T, Miller, C, Nugent, I, Roney, J, Sobie, R, Gershon, T, Harrison, P, Latham, T, Prepost, R, Wu, S, Lees, J P, Brown, D N, Kolomensky, Yu G, Mattison, T S, McKenna, J A, So, R Y, Blinov, V E, Buzykaev, A R, Druzhinin, V P, Golubev, V B, Kozyrev, E A, Kravchenko, E A, Onuchin, A P, Serednyakov, S I, Skovpen, Yu I, Solodov, E P, Todyshev, K Yu, Lankford, A J, Gary, J W, Eisner, A M, Lockman, W S, Chao, D S, Cheng, C H, Flood, K T, Hitlin, D G, Lin, D X, Miyashita, T S, Porter, F C, Meadows, B T, Pushpawela, B G, Sokoloff, M D, Smith, J G, Wagner, S R, Peruzzi, I M, Shuve, B J, Lacker, H M, Gritsan, A V, Lutz, A M, Lange, D J, Wright, D M, Coleman, J P, Hutchcroft, D E, Payne, D J, Bevan, A J, Banerjee, Sw, Davis, C L, Denig, A G, Schubert, K R, Barlow, R J, Lafferty, G D, Roberts, D A, Robertson, S H, Seddon, R M, Summers, D J, Jessop, C P, LoSecco, J M, Bonneaud, G R, Giorgi, M A, Walsh, J J, Smith, A J S, Wilson, F F, Convery, M R, Field, R C, Fulsom, B G, Graham, M T, Innes, W R, Leith, D W G S, MacFarlane, D B, Muller, D R, Ratcliff, B N, Sullivan, M K, Va'vra, J, Wisniewski, W J, Purohit, M V, Wilson, J R, Sekula, S J, Burchat, P R, Puccio, E M T, Alam, M S, Ernst, J A, Peimer, D R, Spanier, S M, Ritchie, J L, Schwitters, R F, Izen, J M, Lou, X C, Bernlochner, F U, King, G J, Nugent, I M, Roney, J M, Sobie, R J, Gershon, T J, Harrison, P F, Latham, T E, Wu, S L, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), 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), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, BaBar, Lees, J. P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D. N., Kolomensky, Y. G., Fritsch, M., Koch, H., Schroeder, T., Cheaib, R., Hearty, C., Mattison, T. S., Mckenna, J. A., So, R. Y., Blinov, V. E., Buzykaev, A. R., Druzhinin, V. P., Golubev, V. B., Kozyrev, E. A., Kravchenko, E. A., Onuchin, A. P., Serednyakov, S. I., Skovpen, Y. I., Solodov, E. P., Todyshev, K. Y., Lankford, A. J., Dey, B., Gary, J. W., Long, O., Eisner, A. M., Lockman, W. S., Panduro Vazquez, W., Chao, D. S., Cheng, C. H., Echenard, B., Flood, K. T., Hitlin, D. G., Kim, J., Li, Y., Lin, D. X., Middleton, S., Miyashita, T. S., Ongmongkolkul, P., Oyang, J., Porter, F. C., Rohrken, M., Huard, Z., Meadows, B. T., Pushpawela, B. G., Sokoloff, M. D., Sun, L., Smith, J. G., Wagner, S. R., Bernard, D., Verderi, M., Bettoni, D., Bozzi, C., Calabrese, R., Cibinetto, G., Fioravanti, E., Garzia, I., Luppi, E., Santoro, V., Calcaterra, A., De Sangro, R., Finocchiaro, G., Martellotti, S., Patteri, P., Peruzzi, I. M., Piccolo, M., Rotondo, M., Zallo, A., Passaggio, S., Patrignani, C., Flood, I., Nguyen, N., Shuve, B. J., Lacker, H. M., Bhuyan, B., Mallik, U., Chen, C., Cochran, J., Prell, S., Gritsan, A. V., Arnaud, N., Davier, M., Le Diberder, F., Lutz, A. M., Wormser, G., Lange, D. J., Wright, D. M., Coleman, J. P., Gabathuler, E., Hutchcroft, D. E., Payne, D. J., Touramanis, C., Bevan, A. J., Di Lodovico, F., Sacco, R., Cowan, G., Banerjee, S. W., Davis, C. L., Denig, A. G., Gradl, W., Griessinger, K., Hafner, A., Schubert, K. R., Barlow, R. J., Lafferty, G. D., Cenci, R., Jawahery, A., Roberts, D. A., Cowan, R., Robertson, S. H., Seddon, R. M., Neri, N., Palombo, F., Cremaldi, L., Godang, R., Summers, D. J., Taras, P., De Nardo, G., Sciacca, C., Raven, G., Jessop, C. P., Losecco, J. M., Honscheid, K., Kass, R., Gaz, A., Margoni, M., Posocco, M., Simi, G., Simonetto, F., Stroili, R., Akar, S., Ben-Haim, E., Bomben, M., Bonneaud, G. R., Calderini, G., Chauveau, J., Marchiori, G., Ocariz, J., Biasini, M., Manoni, E., Rossi, A., Batignani, G., Bettarini, S., Carpinelli, M., Casarosa, G., Chrzaszcz, M., De Nuccio, M., Forti, F., Giorgi, M. A., Lusiani, A., Oberhof, B., Paoloni, E., Rama, M., Rizzo, G., Walsh, J. J., Zani, L., Smith, A. J. S., Anulli, F., Faccini, R., Ferrarotto, F., Ferroni, F., Pilloni, A., Piredda, G., Bunger, C., Dittrich, S., Grunberg, O., Hess, M., Leddig, T., Voss, C., Waldi, R., Adye, T., Wilson, F. F., Emery, S., Vasseur, G., Aston, D., Cartaro, C., Convery, M. R., Dorfan, J., Dunwoodie, W., Ebert, M., Field, R. C., Fulsom, B. G., Graham, M. T., Hast, C., Innes, W. R., Kim, P., Leith, D. W. G. S., Luitz, S., Macfarlane, D. B., Muller, D. R., Neal, H., Ratcliff, B. N., Roodman, A., Sullivan, M. K., Va'Vra, J., Wisniewski, W. J., Purohit, M. V., Wilson, J. R., Randle-Conde, A., Sekula, S. J., Ahmed, H., Tasneem, N., Bellis, M., Burchat, P. R., Puccio, E. M. T., Alam, M. S., Ernst, J. A., Gorodeisky, R., Guttman, N., Peimer, D. R., Soffer, A., Spanier, S. M., Ritchie, J. L., Schwitters, R. F., Izen, J. M., Lou, X. C., Bianchi, F., De Mori, F., Filippi, A., Gamba, D., Lanceri, L., Vitale, L., Martinez-Vidal, F., Oyanguren, A., Albert, J., Beaulieu, A., Bernlochner, F. U., King, G. J., Kowalewski, R., Lueck, T., Miller, C., Nugent, I. M., Roney, J. M., Sobie, R. J., Gershon, T. J., Harrison, P. F., Latham, T. E., Prepost, R., Wu, S. L., Mckenna, J A, Losecco, J M, and Macfarlane, D B
Subjects: flavor changing, General Physics and Astronomy, B meson, High Energy Physics - Experiment, current: constraint, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], QC, B meson decay, scale: electroweak interaction, article, electron positron: colliding beams, mass dependence, The standard model, Confidence level, PEP-II, axion-like particles, axion: mass, photon: pair production, boson, axionlike particles, FOS: Physical sciences, coupling constant: upper limit, Bottom mesons, electron positron: annihilation, meson, Physics::Geophysics, BABAR experiment, B: rare decay, Bosons, Electroweak boson, axionlike particle, High Energy Physics::Phenomenology, ALPs, Particle ma, Upper limit, Bottom meson, Rare decays, SLAC PEP Stor, current, axion: radiative decay, HEP, Electroweak scale, Germanium compound, Orders of magnitude, Rare decay, axion, Hadron, BaBar, coupling: (axion 2photon), High Energy Physics::Experiment, experimental results
Abstract: Axion-like particles (ALPs) are predicted in many extensions of the Standard Model, and their masses can naturally be well below the electroweak scale. In the presence of couplings to electroweak bosons, these particles could be emitted in flavor-changing $B$ meson decays. We report herein a search for an ALP, $a$, in the reaction $B^\pm\rightarrow K^\pm a$, $a\rightarrow\gamma\gamma$ using data collected by the BABAR experiment at SLAC. No significant signal is observed, and 90% confidence level upper limits on the ALP coupling to electroweak bosons are derived as a function of ALP mass, improving current constraints by several orders of magnitude in the range $0.175\,\,\mathrm{GeV} < m_a < 4.78\,\,\mathrm{GeV}$., Comment: 11 pages, 8 figures, submitted to Phys. Rev. Lett
Published: 2022

11. Light meson spectroscopy from Dalitz plot analyses of ηc decays to η′K+K− , η′π+π− , and ηπ+π− produced in two-photon interactions

Author: Z. C. Huard, U. Mallik, Yu. I. Skovpen, T. S. Miyashita, N. Neri, F. Anulli, E. Grauges, G. R. Bonneaud, Mario Giorgi, J. Dorfan, E. Fioravanti, F. Palombo, T. Lueck, Alessandro Gaz, B. N. Ratcliff, G. J. King, Elisa Manoni, F. Di Lodovico, A. M. Rossi, M. Verderi, N. Arnaud, J. L. Ritchie, L. M. Cremaldi, R. Y. So, A. Roodman, M. Rotondo, D. J. Payne, J. W. Gary, M. Ebert, S. H. Robertson, S. Bettarini, R. M. Seddon, F. Ferroni, R. Cenci, G. De Nardo, A. J. Bevan, Herbert Koch, Crisostomo Sciacca, D. Aston, A. Zallo, J. B. Kim, G. Rizzo, P. F. Harrison, D. G. Hitlin, W. J. Wisniewski, N. Tasneem, M. Fritsch, B. T. Meadows, G. Raven, K. Griessinger, S. M. Spanier, Tim Adye, A. Oyanguren, Stephen Robert Wagner, Aidan Randle-Conde, R. D. Kass, R. C. Field, F. Forti, K. R. Schubert, S. Passaggio, M. D. Sokoloff, P. R. Burchat, Yu. G. Kolomensky, G. Finocchiaro, J. P. Lees, Simon Akar, M. S. Alam, R. Prepost, J. M. Roney, C. Hast, S. Luitz, D. J. Lange, S. Martellotti, G. Piredda, W. Panduro Vazquez, D. E. Hutchcroft, Babar, J. Ocariz, I. M. Peruzzi, J. G. Smith, D. B. MacFarlane, H. A. Neal, G. Wormser, A. Calcaterra, C. Bünger, Maurizio Biasini, D. R. Muller, G. Casarosa, T. Leddig, Tamara Vazquez Schroeder, J. M. Izen, P. Ongmongkolkul, B. Bhuyan, B. Oberhof, V. E. Blinov, J. Cochran, E. A. Kravchenko, M. Piccolo, W. S. Lockman, B. G. Fulsom, T. J. Gershon, G. Vasseur, S. I. Serednyakov, F. Bianchi, I. M. Nugent, R. Cheaib, T. S. Mattison, C. Cartaro, Y. B. Li, Owen Rosser Long, D. W. G. S. Leith, G. Batignani, S. J. Sekula, M. R. Convery, A. Jawahery, V. Santoro, B. G. Pushpawela, W. Dunwoodie, Marco Bomben, S. Dittrich, D. S. Chao, R. Waldi, R. Gorodeisky, D. N. Brown, F. F. Wilson, Douglas Wright, D. A. Roberts, L. Zani, J. A. Ernst, L. Sun, T. E. Latham, M. Carpinelli, V. B. Golubev, C. P. Jessop, G. Calderini, Martino Margoni, M. Davier, J. M. LoSecco, M. K. Sullivan, S. Emery, E. Ben-Haim, E. A. Kozyrev, C. Touramanis, A. M. Lutz, E. Paoloni, B. Dey, M. T. Graham, A. Hafner, O. Grünberg, W. Gradl, D. X. Lin, M. Rama, J. Va’vra, Hamad Ahmed, R. Kowalewski, J. A. McKenna, A. P. Onuchin, E. M. T. Puccio, G. Cibinetto, A. V. Gritsan, Alessandro Pilloni, A. R. Buzykaev, D. R. Peimer, K. T. Flood, A. Beaulieu, M. Röhrken, A. Palano, R. Sacco, N. Guttman, G. Marchiori, R. Faccini, F. Ferrarotto, A. J. Lankford, F. Le Diberder, F. De Mori, P. Patteri, L. Lanceri, A. Filippi, Denis Bernard, A. J. S. Smith, R. Cowan, B. Echenard, J. Chauveau, V. P. Druzhinin, C. Bozzi, G. Cowan, K. Honscheid, R. J. Barlow, M. Posocco, D. Gamba, M. Bellis, James R. Wilson, Brian Shuve, R. Calabrese, G. Eigen, K. Yu Todyshev, R. Stroili, F. Simonetto, J. J. Walsh, G. D. Lafferty, X. C. Lou, J. Oyang, R. Godang, Cheng Chen, H. M. Lacker, M. Heß, C. Hearty, D. J. Summers, S. Prell, I. Garzia, R. J. Sobie, V. Poireau, A. Soffer, L. Vitale, F. Martinez-Vidal, A. Lusiani, E. Luppi, P. Taras, E. P. Solodov, J. P. Coleman, A. G. Denig, C. L. Davis, R. F. Schwitters, A. M. Eisner, Peter S. Kim, M. V. Purohit, J. Albert, C. H. Cheng, R. de Sangro, S. L. Wu, E. Gabathuler, W. R. Innes, F. C. Porter, M. Chrzaszcz, C. Voß, Sw. Banerjee, G. Simi, D. Bettoni, Florian Urs Bernlochner, C. Patrignani, and V. Tisserand
Subjects: Physics, Meson, 010308 nuclear & particles physics, Branching fraction, Glueball, Electron–positron annihilation, Resonance, Dalitz plot, 01 natural sciences, Crystallography, 0103 physical sciences, 010306 general physics, Spectroscopy, Scalar meson
Abstract: We study the processes γ γ → η c → η ′ K + K - , η ′ π + π - , and η π + π - using a data sample of 519 fb - 1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e + e - collider at center-of-mass energies at and near the ϒ ( n S ) ( n = 2 , 3, 4) resonances. This is the first observation of the decay η c → η ′ K + K - and we measure the branching fraction Γ ( η c → η ′ K + K - ) / ( Γ ( η c → η ′ π + π - ) = 0.644 ± 0.03 9 stat ± 0.03 2 sys . Significant interference is observed between γ γ → η c → η π + π - and the nonresonant two-photon process γ γ → η π + π - . A Dalitz plot analysis is performed of η c decays to η ′ K + K - , η ′ π + π - , and η π + π - . Combined with our previous analysis of η c → K K ¯ π , we measure the K 0 * ( 1430 ) parameters and the ratio between its η ′ K and π K couplings. The decay η c → η ′ π + π - is dominated by the f 0 ( 2100 ) resonance, also observed in J / ψ radiative decays. A new a 0 ( 1700 ) → η π resonance is observed in the η c → η π + π - channel. We also compare η c decays to η and η ′ final states in association with scalar mesons as they relate to the identification of the scalar glueball.
Published: 2021

12. Study of the reactions e+e−→2(π+π−)π0π0π0 and 2(π+π−)π0π0η at center-of-mass energies from threshold to 4.5 GeV using initial-state radiation

Author: R. Cenci, A. Zallo, J. B. Kim, M. Fritsch, E. Grauges, Mario Giorgi, A. V. Gritsan, D. B. MacFarlane, C. H. Cheng, Simon Akar, R. Prepost, E. A. Kravchenko, J. L. Ritchie, G. Vasseur, K. T. Flood, B. N. Ratcliff, Z. C. Huard, Y. I. Skovpen, A. Calcaterra, R. de Sangro, J. Va’vra, M. Röhrken, L. M. Cremaldi, A. Filippi, R. Cowan, R. Sacco, M. Ebert, C. L. Davis, A. Palano, P. Ongmongkolkul, Marco Bomben, G. J. King, N. Tasneem, James R. Wilson, F. Simonetto, S. Banerjee, P. Taras, E. P. Solodov, M. Piccolo, M. Hess, Brian Shuve, R. Calabrese, G. Batignani, F. Anulli, Aidan Randle-Conde, G. Simi, D. G. Hitlin, P. Patteri, P. F. Harrison, V. P. Druzhinin, C. Bozzi, G. Cowan, K. Honscheid, Alessandro Gaz, E. Ben-Haim, J. Oyang, G. Eigen, Alessandro Pilloni, Cheng Chen, R. J. Barlow, J. J. Walsh, S. H. Robertson, M. Posocco, D. R. Peimer, R. Gorodeisky, V. B. Golubev, J. Ocariz, Crisostomo Sciacca, D. Aston, N. Guttman, F. Forti, D. A. Roberts, G. Rizzo, B. Echenard, Douglas Wright, Herbert Koch, M. Rotondo, L. Zani, V. E. Blinov, A. M. Lutz, R. Cheaib, H. A. Neal, G. Casarosa, D. X. Lin, R. Waldi, M. Rama, J. P. Coleman, D. Gamba, M. Bellis, G. De Nardo, X. C. Lou, J. A. McKenna, M. T. Graham, A. Hafner, E. Gabathuler, W. R. Innes, C. Hearty, F. C. Porter, J. M. LoSecco, T. E. Latham, K. Griessinger, G. Marchiori, G. Wormser, M. Carpinelli, C. Voss, B. Dey, J. M. Izen, A. Oyanguren, W. Gradl, E. M. T. Puccio, D. J. Summers, J. P. Lees, G. D. Lafferty, D. W. G. S. Leith, S. Prell, Hamad Ahmed, R. Stroili, R. Faccini, I. Garzia, F. De Mori, J. Cochran, M. Chrzaszcz, F. Ferrarotto, A. J. Lankford, B. Bhuyan, F. Le Diberder, G. Calderini, A. R. Buzykaev, V. Santoro, B. G. Fulsom, R. J. Sobie, V. Poireau, A. Beaulieu, L. Vitale, Denis Bernard, Peter S. Kim, F. Martinez-Vidal, A. J. S. Smith, Y. B. Li, A. Soffer, A. M. Rossi, R. C. Field, L. Lanceri, W. Dunwoodie, S. Luitz, C. P. Jessop, E. Fioravanti, A. Lusiani, Martino Margoni, W. J. Wisniewski, F. Palombo, T. Lueck, E. Luppi, J. Chauveau, Maurizio Biasini, G. Finocchiaro, D. R. Muller, M. K. Sullivan, R. Godang, A. Roodman, Tamara Vazquez Schroeder, C. Cartaro, H. M. Lacker, R. M. Seddon, M. S. Alam, Owen Rosser Long, B. G. Pushpawela, F. Ferroni, So R. Y., A. G. Denig, Tim Adye, R. D. Kass, J. A. Ernst, L. Sun, B. Oberhof, Stephen Robert Wagner, B. T. Meadows, S. Passaggio, K. R. Schubert, S. Martellotti, R. F. Schwitters, R. Kowalewski, G. Raven, M. D. Sokoloff, C. Bünger, I. M. Nugent, K. Y. Todyshev, P. R. Burchat, D. S. Chao, M. Davier, S. J. Sekula, A. Jawahery, E. A. Kozyrev, A. P. Onuchin, G. Cibinetto, C. Hast, D. J. Lange, G. Piredda, W. Panduro Vazquez, A. M. Eisner, T. J. Gershon, M. V. Purohit, G. R. Bonneaud, J. Dorfan, J. Albert, Elisa Manoni, M. Verderi, N. Arnaud, E. Paoloni, I. M. Peruzzi, J. W. Gary, S. I. Serednyakov, F. Bianchi, S. Dittrich, Wu S. L., Y. G. Kolomensky, C. Touramanis, O. Grünberg, J. M. Roney, J. G. Smith, U. Mallik, T. S. Miyashita, N. Neri, S. Bettarini, A. J. Bevan, S. M. Spanier, D. E. Hutchcroft, T. Leddig, F. Di Lodovico, W. S. Lockman, M. R. Convery, D. J. Payne, T. S. Mattison, D. N. Brown, F. F. Wilson, S. Emery, D. Bettoni, Florian Urs Bernlochner, C. Patrignani, and V. Tisserand
Subjects: Physics, 010308 nuclear & particles physics, 0103 physical sciences, Hadron, Mass spectrum, Analytical chemistry, Invariant mass, Center of mass, State (functional analysis), 010306 general physics, 01 natural sciences, Luminosity
Abstract: Author(s): Lees, JP; Poireau, V; Tisserand, V; Grauges, E; Palano, A; Eigen, G; Brown, DN; Kolomensky, YG; Fritsch, M; Koch, H; Schroeder, T; Cheaib, R; Hearty, C; Mattison, TS; McKenna, JA; So, RY; Blinov, VE; Buzykaev, AR; Druzhinin, VP; Golubev, VB; Kozyrev, EA; Kravchenko, EA; Onuchin, AP; Serednyakov, SI; Skovpen, YI; Solodov, EP; Todyshev, KY; Lankford, AJ; Dey, B; Gary, JW; Long, O; Eisner, AM; Lockman, WS; Panduro Vazquez, W; Chao, DS; Cheng, CH; Echenard, B; Flood, KT; Hitlin, DG; Kim, J; Li, Y; Lin, DX; Miyashita, TS; Ongmongkolkul, P; Oyang, J; Porter, FC; Rohrken, M; Huard, Z; Meadows, BT; Pushpawela, BG; Sokoloff, MD; Sun, L; Smith, JG; Wagner, SR; Bernard, D; Verderi, M; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Fioravanti, E; Garzia, I; Luppi, E; Santoro, V; Calcaterra, A; De Sangro, R; Finocchiaro, G; Martellotti, S; Patteri, P; Peruzzi, IM; Piccolo, M; Rotondo, M; Zallo, A; Passaggio, S; Patrignani, C; Shuve, BJ; Lacker, HM; Bhuyan, B; Mallik, U; Chen, C; Cochran, J; Prell, S; Gritsan, AV; Arnaud, N; Davier, M | Abstract: We study the processes e+e-→2(π+π-)π0π0π0γ and 2(π+π-)π0π0ηγ in which an energetic photon is radiated from the initial state. The data were collected with the BABAR detector at SLAC. About 14 000 and 4700 events, respectively, are selected from a data sample corresponding to an integrated luminosity of 469 fb-1. The invariant mass of the hadronic final state defines the effective e+e- center-of-mass energy. The center-of-mass energies range from threshold to 4.5 GeV. From the mass spectra, the first ever measurements of the e+e-→2(π+π-)π0π0π0 and the e+e-→2(π+π-)π0π0η cross sections are performed. The contributions from ωπ+π-π0π0, η2(π+π-), and other intermediate states are presented. We observe the J/ψ and ψ(2S) in most of these final states and measure the corresponding branching fractions, many of them for the first time.
Published: 2021

13. Observation of a fine structure in e+e− → hadrons production at the nucleon-antinucleon threshold

Author: Yu. M. Shatunov, N.M. Ryskulov, V.S. Okhapkin, D. B. Shwartz, A. N. Kirpotin, A. I. Senchenko, D.N. Shemyakin, A.L. Sibidanov, D.N. Grigoriev, P. Yu. Shatunov, F.V. Ignatov, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, Yu.N. Pestov, Yu.V. Yudin, P.A. Lukin, A.V. Bragin, E. P. Solodov, N.S. Bashtovoy, A.A. Korobov, B.A. Shwartz, A.S. Popov, G.P. Razuvaev, G.V. Fedotovich, D.E. Berkaev, A.E. Ryzhenenkov, Alexey Talyshev, Vassili Kazanin, R.R. Akhmetshin, S.V. Karpov, E.A. Kozyrev, S.E. Gayazov, A.S. Kuzmin, V.Sh. Banzarov, D.A. Epifanov, K.Yu. Mikhailov, I. A. Koop, A.N. Amirkhanov, A.E. Bondar, A.A. Ruban, V.M. Titov, I.B. Logashenko, V.M. Aulchenko, A.E. Kuzmenko, L.B. Epshteyn, A.N. Kozyrev, S.I. Eidelman, A. V. Otboev, A.A. Grebenuk, S. S. Tolmachev, Ilya Zemlyansky, S.S. Gribanov, A.L. Erofeev, Alexey Anisenkov, and P. Krokovny
Subjects: Physics, Nuclear and High Energy Physics, Resonance amplitude, Annihilation, Electron–positron annihilation, Hadron, High Energy Physics::Experiment, Atomic physics, Nucleon, Nuclear Experiment, lcsh:Physics, lcsh:QC1-999, High Energy Physics - Experiment
Abstract: A study of hadron production at the nucleon-antinucleon threshold has been performed with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider. A very fast rise with about 1 MeV width has been observed in the $e^+e^- \to p\bar p$ cross section. A sharp drop in the $e^+e^- \to 3(\pi^+\pi^-)$ cross section has been confirmed and found to have a less than 2 MeV width, in agreement with the observed fast rise of the $e^+e^- \to p\bar p$ cross section. For the first time a similar sharp drop is demonstrated in the $e^+e^- \to K^+K^-\pi^+\pi^-$ cross section. The behavior of the $e^+e^- \to 3(\pi^+\pi^-),~ K^+K^-\pi^+\pi^-$ cross sections cannot be explained by an interference of any resonance amplitude with continuum, therefore this phenomenon cannot be due to a narrow near-threshold resonance. No such structure has been observed in the $e^+e^- \to 2(\pi^+\pi^-)$ cross section., Comment: 7 pages, 5 figures
Published: 2019

14. Light meson spectroscopy from Dalitz plot analyses ηc decays to η0K + K − , η0π + π − , and ηπ + π − produced in two-photon interactions

Author: J. ???P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, D. ???N. Brown, Yu. ???G. Kolomensky, M. Fritsch, H. Koch, T. Schroeder, R. Cheaib, C. Hearty, T. ???S. Mattison, J. ???A. McKenna, R. ???Y. So, V. ???E. Blinov, A. ???R. Buzykaev, V. ???P. Druzhinin, V. ???B. Golubev, E. ???A. Kozyrev, E. ???A. Kravchenko, A. ???P. Onuchin, S. ???I. Serednyakov, Yu. ???I. Skovpen, E. ???P. Solodov, K. ???Yu. Todyshev, A. ???J. Lankford, B. Dey, J. ???W. Gary, O. Long, A. ???M. Eisner, W. ???S. Lockman, W. Panduro Vazquez, D. ???S. Chao, C. ???H. Cheng, B. Echenard, K. ???T. Flood, D. ???G. Hitlin, J. Kim, Y. Li, D. ???X. Lin, T. ???S. Miyashita, P. Ongmongkolkul, J. Oyang, F. ???C. Porter, M. R??hrken, Z. Huard, B. ???T. Meadows, B. ???G. Pushpawela, M. ???D. Sokoloff, L. Sun, J. ???G. Smith, S. ???R. Wagner, D. Bernard, M. Verderi, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, V. Santoro, A. Calcaterra, R. de Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I. ???M. Peruzzi, M. Piccolo, M. Rotondo, A. Zallo, S. Passaggio, C. Patrignani, B. ???J. Shuve, H. ???M. Lacker, B. Bhuyan, U. Mallik, C. Chen, J. Cochran, S. Prell, A. ???V. Gritsan, N. Arnaud, M. Davier, F. Le Diberder, A. ???M. Lutz, G. Wormser, D. ???J. Lange, D. ???M. Wright, J. ???P. Coleman, E. Gabathuler, D. ???E. Hutchcroft, D. ???J. Payne, C. Touramanis, A. ???J. Bevan, F. Di Lodovico, R. Sacco, G. Cowan, Sw. Banerjee, C. ???L. Davis, A. ???G. Denig, W. Gradl, K. Griessinger, A. Hafner, K. ???R. Schubert, R. ???J. Barlow, G. ???D. Lafferty, R. Cenci, A. Jawahery, D. ???A. Roberts, R. Cowan, S. ???H. Robertson, R. ???M. Seddon, N. Neri, F. Palombo, L. Cremaldi, R. Godang, D. ???J. Summers, P. Taras, G. De Nardo, C. Sciacca, G. Raven, C. ???P. Jessop, J. ???M. LoSecco, K. Honscheid, R. Kass, A. Gaz, M. Margoni, M. Posocco, G. Simi, F. Simonetto, R. Stroili, S. Akar, E. Ben-Haim, M. Bomben, G. ???R. Bonneaud, G. Calderini, J. Chauveau, G. Marchiori, J. Ocariz, M. Biasini, E. Manoni, A. Rossi, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, M. Chrzaszcz, F. Forti, M. ???A. Giorgi, A. Lusiani, B. Oberhof, E. Paoloni, M. Rama, G. Rizzo, J. ???J. Walsh, L. Zani, A. ???J. ???S. Smith, F. Anulli, R. Faccini, F. Ferrarotto, F. Ferroni, A. Pilloni, G. Piredda, C. B??nger, S. Dittrich, O. Gr??nberg, M. He??, T. Leddig, C. Vo??, R. Waldi, T. Adye, F. ???F. Wilson, S. Emery, G. Vasseur, D. Aston, C. Cartaro, M. ???R. Convery, J. Dorfan, W. Dunwoodie, M. Ebert, R. ???C. Field, B. ???G. Fulsom, M. ???T. Graham, C. Hast, W. ???R. Innes, P. Kim, D. ???W. ???G. ???S. Leith, S. Luitz, D. ???B. MacFarlane, D. ???R. Muller, H. Neal, B. ???N. Ratcliff, A. Roodman, M. ???K. Sullivan, J. Va???vra, W. ???J. Wisniewski, M. ???V. Purohit, J. ???R. Wilson, A. Randle-Conde, S. ???J. Sekula, H. Ahmed, M. Bellis, P. ???R. Burchat, E. ???M. ???T. Puccio, M. ???S. Alam, J. ???A. Ernst, R. Gorodeisky, N. Guttman, D. ???R. Peimer, A. Soffer, S. ???M. Spanier, J. ???L. Ritchie, R. ???F. Schwitters, J. ???M. Izen, X. ???C. Lou, F. Bianchi, F. De Mori, A. Filippi, D. Gamba, L. Lanceri, L. Vitale, F. Martinez-Vidal, A. Oyanguren, J. Albert, A. Beaulieu, F. ???U. Bernlochner, G. ???J. King, R. Kowalewski, T. Lueck, I. ???M. Nugent, J. ???M. Roney, R. ???J. Sobie, N. Tasneem, T. ???J. Gershon, P. ???F. Harrison, T. ???E. Latham, R. Prepost, S. ???L. Wu, Lees, J. ???P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D. ???N., Kolomensky, Yu. ???G., Fritsch, M., Koch, H., Schroeder, T., Cheaib, R., Hearty, C., Mattison, T. ???S., Mckenna, J. ???A., So, R. ???Y., Blinov, V. ???E., Buzykaev, A. ???R., Druzhinin, V. ???P., Golubev, V. ???B., Kozyrev, E. ???A., Kravchenko, E. ???A., Onuchin, A. ???P., Serednyakov, S. ???I., Skovpen, Yu. ???I., Solodov, E. ???P., Todyshev, K. ???Yu., Lankford, A. ???J., Dey, B., Gary, J. ???W., Long, O., Eisner, A. ???M., Lockman, W. ???S., Panduro Vazquez, W., Chao, D. ???S., Cheng, C. ???H., Echenard, B., Flood, K. ???T., Hitlin, D. ???G., Kim, J., Li, Y., Lin, D. ???X., Miyashita, T. ???S., Ongmongkolkul, P., Oyang, J., Porter, F. ???C., R??hrken, M., Huard, Z., Meadows, B. ???T., Pushpawela, B. ???G., Sokoloff, M. ???D., Sun, L., Smith, J. ???G., Wagner, S. ???R., Bernard, D., Verderi, M., Bettoni, D., Bozzi, C., Calabrese, R., Cibinetto, G., Fioravanti, E., Garzia, I., Luppi, E., Santoro, V., Calcaterra, A., de Sangro, R., Finocchiaro, G., Martellotti, S., Patteri, P., Peruzzi, I. ???M., Piccolo, M., Rotondo, M., Zallo, A., Passaggio, S., Patrignani, C., Shuve, B. ???J., Lacker, H. ???M., Bhuyan, B., Mallik, U., Chen, C., Cochran, J., Prell, S., Gritsan, A. ???V., Arnaud, N., Davier, M., Le Diberder, F., Lutz, A. ???M., Wormser, G., Lange, D. ???J., Wright, D. ???M., Coleman, J. ???P., Gabathuler, E., Hutchcroft, D. ???E., Payne, D. ???J., Touramanis, C., Bevan, A. ???J., Di Lodovico, F., Sacco, R., Cowan, G., Banerjee, Sw., Davis, C. ???L., Denig, A. ???G., Gradl, W., Griessinger, K., Hafner, A., Schubert, K. ???R., Barlow, R. ???J., Lafferty, G. ???D., Cenci, R., Jawahery, A., Roberts, D. ???A., Cowan, R., Robertson, S. ???H., Seddon, R. ???M., Neri, N., Palombo, F., Cremaldi, L., Godang, R., Summers, D. ???J., Taras, P., De Nardo, G., Sciacca, C., Raven, G., Jessop, C. ???P., Losecco, J. ???M., Honscheid, K., Kass, R., Gaz, A., Margoni, M., Posocco, M., Simi, G., Simonetto, F., Stroili, R., Akar, S., Ben-Haim, E., Bomben, M., Bonneaud, G. ???R., Calderini, G., Chauveau, J., Marchiori, G., Ocariz, J., Biasini, M., Manoni, E., Rossi, A., Batignani, G., Bettarini, S., Carpinelli, M., Casarosa, G., Chrzaszcz, M., Forti, F., Giorgi, M. ???A., Lusiani, A., Oberhof, B., Paoloni, E., Rama, M., Rizzo, G., Walsh, J. ???J., Zani, L., Smith, A. ???J. ???S., Anulli, F., Faccini, R., Ferrarotto, F., Ferroni, F., Pilloni, A., Piredda, G., B??nger, C., Dittrich, S., Gr??nberg, O., He??, M., Leddig, T., Vo??, C., Waldi, R., Adye, T., Wilson, F. ???F., Emery, S., Vasseur, G., Aston, D., Cartaro, C., Convery, M. ???R., Dorfan, J., Dunwoodie, W., Ebert, M., Field, R. ???C., Fulsom, B. ???G., Graham, M. ???T., Hast, C., Innes, W. ???R., Kim, P., Leith, D. ???W. ???G. ???S., Luitz, S., Macfarlane, D. ???B., Muller, D. ???R., Neal, H., Ratcliff, B. ???N., Roodman, A., Sullivan, M. ???K., Va???vra, J., Wisniewski, W. ???J., Purohit, M. ???V., Wilson, J. ???R., Randle-Conde, A., Sekula, S. ???J., Ahmed, H., Bellis, M., Burchat, P. ???R., Puccio, E. ???M. ???T., Alam, M. ???S., Ernst, J. ???A., Gorodeisky, R., Guttman, N., Peimer, D. ???R., Soffer, A., Spanier, S. ???M., Ritchie, J. ???L., Schwitters, R. ???F., Izen, J. ???M., Lou, X. ???C., Bianchi, F., De Mori, F., Filippi, A., Gamba, D., Lanceri, L., Vitale, L., Martinez-Vidal, F., Oyanguren, A., Albert, J., Beaulieu, A., Bernlochner, F. ???U., King, G. ???J., Kowalewski, R., Lueck, T., Nugent, I. ???M., Roney, J. ???M., Sobie, R. ???J., Tasneem, N., Gershon, T. ???J., Harrison, P. ???F., Latham, T. ???E., Prepost, R., and Wu, S. ???L.
Subjects: Belle II, SuperKEKB, Dalitz, Dalitz plot analyses, light meson, Light meson spectroscopy, Dalitz plot analyse
Abstract: We study the processes γγ → ηc → η0KþK−, η0πþπ−, and ηπþπ− using a data sample of 519 fb−1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e+e− collider at center-of-mass energies at and near the Υ(nS) (n = 2, 3, 4) resonances. This is the first observation of the decay ηc → η0KþK− and we measure the branching fraction Γðηc → η0KþK−Þ=ðΓðηc → η0πþπ−Þ 1⁄4 0.644 0.039stat 0.032sys. Significant interference is observed between γγ → ηc → ηπþπ− and the nonresonant two-photon process γγ → ηπþπ−. A Dalitz plot analysis is performed of ηc decays to η0KþK−, η0πþπ−, and ηπþπ−. Combined with our previous analysis of ηc → KK ̄ π, we measure the K 0ð1430Þ parameters and the ratio between its η0K and πK couplings. The decay ηc → η0πþπ− is dominated by the f0ð2100Þ resonance, also observed in J=ψ radiative decays. A new a0(1700)→ ηπ resonance is observed in the ηc → ηπþπ− channel. We also compare ηc decays to η and η0 final states in association with scalar mesons as they relate to the identification of the scalar glueball.
Published: 2021

15. Precision Measurement of the Ratio B(ϒ(3S)→τ+τ−)/B(ϒ(3S)→μ+μ−)

Author: J. Dorfan, N. Tasneem, B. N. Ratcliff, Aidan Randle-Conde, Biplab Dey, M. Hess, Z. C. Huard, W. Panduro Vazquez, C. H. Cheng, F. Simonetto, R. de Sangro, A. Filippi, S. Bettarini, Roberto Calabrese, C. H. Chen, L. M. Cremaldi, R. Cowan, J. Ocariz, S. M. Spanier, Y. Li, A. Roodman, R. M. Seddon, I. M. Peruzzi, E. Fioravanti, Vladimir Blinov, F. Bianchi, S. Dittrich, S. Akar, W. S. Lockman, E. Ben-Haim, A. G. Denig, D. G. Hitlin, J. W. Gary, J. L. Ritchie, S. I. Serednyakov, Roland Waldi, F. Ferroni, So R. Y., M. Verderi, X. C. Lou, F. De Mori, F. Anulli, R. C. Field, R. Godang, U. Mallik, Heiko Lacker, E. Gabathuler, F. C. Porter, R. Gorodeisky, D. W. G. S. Leith, Paul Fraser Harrison, D. A. Roberts, Ju-Young Kim, N. Neri, N. Arnaud, J. M. LoSecco, G. Calderini, Stephen Robert Wagner, K. R. Schubert, M. K. Sullivan, D. Gamba, F. Forti, Alessandro Gaz, A. Hafner, E. M. T. Puccio, N. Guttman, W. Dunwoodie, A. Calcaterra, B. G. Pushpawela, C. Cartaro, G. Marchiori, Maurizio Biasini, C. Hearty, M. Chrzaszcz, A. Sibidanov, D. J. Summers, J. M. Roney, J. G. Smith, G. Wormser, Marco Bomben, S. H. Robertson, M. Fritsch, Douglas Wright, L. Zani, W. R. Innes, R. J. Sobie, M. V. Purohit, J. Albert, L. Vitale, R. Cheaib, D. Bettoni, Andrei Gritsan, James R. Wilson, S. Emery, Brian Shuve, F. Martinez-Vidal, Dominik Müller, T. Schroeder, J. J. Walsh, R. Cenci, A. Zallo, A. M. Rossi, F. Di Lodovico, D. J. Payne, V. Poireau, Owen Rosser Long, M. Piccolo, Joseph Izen, B. Echenard, D. Bernard, Florian Urs Bernlochner, D. N. Brown, Hamad Ahmed, F. Palombo, T. Lueck, D. E. Hutchcroft, J. A. Ernst, W. Gradl, Abner Soffer, Herbert Koch, M. T. Graham, T. Leddig, P. Ongmongkolkul, L. Lanceri, G. D. Lafferty, A. P. Onuchin, L. Sun, Eleonora Luppi, I. Garzia, K. Y. Todyshev, G. Batignani, J. Oyang, C. Patrignani, G. Rizzo, V. Tisserand, Colin Jessop, G. Eigen, G. Finocchiaro, D. X. Lin, D. B. MacFarlane, M. Rama, Adrian John Bevan, W. J. Wisniewski, R. Prepost, J. Chauveau, G. J. King, J. A. McKenna, S. Prell, T. E. Latham, K. Griessinger, E. Paoloni, Yuri Skovpen, F. F. Wilson, James H Cochran, J. P. Lees, S. Martellotti, M. Carpinelli, B. Oberhof, M. Rotondo, T. S. Mattison, B. T. Meadows, V. Santoro, A. Lusiani, G. De Nardo, G. Vasseur, K. T. Flood, M. Röhrken, G. Raven, M. D. Sokoloff, V. P. Druzhinin, Alessandro Pilloni, D. R. Peimer, A. M. Eisner, I. M. Nugent, R. Stroili, P. R. Burchat, C. Hast, D. J. Lange, G. Piredda, Sw. Banerjee, D. S. Chao, G. R. Bonneaud, E. Grauges, Mario Giorgi, M. Davier, R. Sacco, T. J. Gershon, P. Taras, Gabriele Simi, C. L. Davis, A. J.S. Smith, R. Kowalewski, J. P. Coleman, E. P. Solodov, T. S. Miyashita, R. F. Schwitters, Elisa Manoni, D. Aston, C. Bünger, E. A. Kravchenko, A. Oyanguren, Crisostomo Sciacca, M. Bellis, C. Touramanis, O. Grünberg, A. Jawahery, Martino Margoni, G. Cibinetto, E. A. Kozyrev, C. Voss, P. C. Kim, Tim Adye, R. D. Kass, B. Bhuyan, B. G. Fulsom, V. B. Golubev, A. Palano, S. Luitz, P. Patteri, J. Va’vra, A. M. Lutz, S. Passaggio, R. Faccini, F. Ferrarotto, A. J. Lankford, F. Le Diberder, G. A. Cowan, M. Ebert, Stephen Sekula, C. Bozzi, K. Honscheid, R. J. Barlow, M. Posocco, H. A. Neal, G. Casarosa, A. R. Buzykaev, M. S. Alam, A. Beaulieu, Wu S. L., M. R. Convery, and Y. G. Kolomensky
Subjects: Physics, Particle physics, Meson, 0103 physical sciences, General Physics and Astronomy, High Energy Physics::Experiment, 010306 general physics, 01 natural sciences, Energy (signal processing), Standard Model
Abstract: We report on a precision measurement of the ratio ${\cal R}_{\tau\mu}^{\Upsilon(3S)} = {\cal B}(\Upsilon(3S)\to\tau^+\tau^-)/{\cal B}(\Upsilon(3S)\to\mu^+\mu^-)$ using data collected with the BaBar detector at the SLAC PEP-II $e^+e^-$ collider. The measurement is based on a 28 fb$^{-1}$ data sample collected at a center-of-mass energy of 10.355 GeV corresponding to a sample of 122 million $\Upsilon(3S)$ mesons. The ratio is measured to be ${\cal R}_{\tau\mu}^{\Upsilon(3S)} = 0.966 \pm 0.008_\mathrm{stat} \pm 0.014_\mathrm{syst}$ and is in agreement with the Standard Model prediction of 0.9948 within 2 standard deviations. The uncertainty in ${\cal R}_{\tau\mu}^{\Upsilon(3S)}$ is almost an order of magnitude smaller than the only previous measurement.
Published: 2020

16. Intermediate dynamics of the four pions production in $e^+e^-$ annihilation and tau decay processes

Author: E A Kozyrev, R. R Akhmetshin, A N Amirkhanov, A V Anisenkov, V M Aulchenko, V Sh Banzarov, N S Bashtovoy, D E Berkaev, A E Bondar, A V Bragin, S I Eidelman, A D Epifanov, L B Epshteyn, A L Erofeev, G V Fedotovich, S E Gayazov, A. A Grebenuk, S. S Gribanov, D N Grigoriev, F V Ignatov, V L Ivanov, S V Karpov, V F Kazanin, I A Koop, A N Kirpotin, A. A Korobov, A N Kozyrev, P. P Krokovny, A E Kuzmenko, A S Kuzmin, I B Logashenko, P A Lukin, K Yu Mikhailov, V S Okhapkin, Yu N Pestov, A S Popov, G P Razuvaev, Yu A Rogovsky, A. A Ruban, N M Ryskulov, A E Ryzhenenkov, A V Semenov, Yuri M. Shatunov, P Yu Shatunov, V E Shebalin, D N Shemyakin, B A Shwartz, D B Shwartz, A L Sibidanov, E P Solodov, V M Titov, A. A Talyshev, A I Vorobiov, I M Zemlyansky, and Yu V Yudin
Published: 2020

17. Search for Rare or Forbidden Decays of the D0 Meson

Author: T. E. Latham, M. Carpinelli, J. Ocariz, J. W. Gary, V. B. Golubev, Alessandro Pilloni, E. Grauges, Mario Giorgi, Elisa Manoni, N. Tasneem, Yu G. Kolomensky, D. Aston, James R. Wilson, Brian Shuve, R. Calabrese, D. R. Peimer, A. Calcaterra, J. M. Roney, C. Cartaro, Aidan Randle-Conde, J. G. Smith, S. Bettarini, J. L. Ritchie, J. M. LoSecco, Marco Bomben, C. H. Chen, S. M. Spanier, D. Bettoni, Colin Jessop, R. Prepost, D. B. MacFarlane, M. Rama, A. M. Rossi, Joseph Izen, Z. C. Huard, W. Panduro Vazquez, C. Voss, L. M. Cremaldi, J. A. McKenna, H. A. Neal, G. Casarosa, W. R. Innes, W. S. Lockman, A. G. Denig, A. Oyanguren, F. Di Lodovico, D. J. Payne, E. A. Kravchenko, M. Verderi, S. Martellotti, C. Hearty, F. Anulli, B. T. Meadows, G. Raven, V. Poireau, Alessandro Gaz, M. Piccolo, D. J. Summers, M. D. Sokoloff, P. R. Burchat, Abner Soffer, G. Eigen, M. Fritsch, P. C. Kim, Crisostomo Sciacca, G. Rizzo, J. J. Walsh, W. J. Wisniewski, G. Vasseur, K. T. Flood, R. Kowalewski, W. Dunwoodie, U. Mallik, S. H. Robertson, S. Emery, G. Batignani, G. J. King, A. R. Buzykaev, M. S. Alam, D. G. Hitlin, E. A. Kozyrev, R. Cenci, C. Touramanis, E. Fioravanti, A. Zallo, Florian Urs Bernlochner, F. Palombo, T. Lueck, I. M. Nugent, B. G. Pushpawela, N. Neri, R. J. Sobie, L. Vitale, R. Sacco, Herbert Koch, D. S. Chao, A. Beaulieu, D. N. Brown, Douglas Wright, L. Zani, F. Martinez-Vidal, Dominik Müller, M. T. Graham, O. Grünberg, K. Griessinger, M. V. Purohit, J. P. Lees, J. Albert, R. C. Field, M. Davier, A. Roodman, R. M. Seddon, E. Paoloni, T. S. Miyashita, G. D. Lafferty, C. Patrignani, A. J.S. Smith, M. Ebert, E. Luppi, D. E. Hutchcroft, Stephen Sekula, R. Gorodeisky, D. A. Roberts, Roland Waldi, F. Ferroni, T. S. Mattison, T. Leddig, So R. Y., F. De Mori, C. L. Davis, P. Ongmongkolkul, R. Godang, F. Forti, C. Hast, D. J. Lange, G. Piredda, Paul Fraser Harrison, J. Dorfan, Heiko Lacker, A. Hafner, E. M. T. Puccio, B. Bhuyan, Ju-Young Kim, Maurizio Biasini, V. Tisserand, G. R. Bonneaud, M. Rotondo, R. Cheaib, Stephen Robert Wagner, B. G. Fulsom, Tim Adye, T. J. Gershon, K. R. Schubert, V. P. Druzhinin, C. Bozzi, K. Honscheid, M. K. Sullivan, V. E. Blinov, G. De Nardo, V. Santoro, R. D. Kass, Owen Rosser Long, Yu I. Skovpen, F. Simonetto, J. A. Ernst, W. Gradl, L. Lanceri, R. J. Barlow, B. Echenard, M. Röhrken, C. H. Cheng, M. Posocco, R. Faccini, F. Ferrarotto, A. J. Lankford, E. Gabathuler, F. C. Porter, D. Bernard, G. Wormser, L. Sun, G. Finocchiaro, J. Chauveau, T. Schroeder, E. Ben-Haim, R. de Sangro, Adrian John Bevan, M. Hess, F. Le Diberder, D. W. G. S. Leith, X. C. Lou, G. A. Cowan, G. Calderini, D. Gamba, M. Bellis, F. F. Wilson, Martino Margoni, M. Chrzaszcz, A. Filippi, B. Oberhof, A. M. Eisner, Y. Li, R. Cowan, Sw. Banerjee, S. Akar, G. Simi, S. Prell, I. Garzia, N. Guttman, James H Cochran, G. Marchiori, K. Yu Todyshev, R. Stroili, A. Lusiani, P. Taras, E. P. Solodov, J. P. Coleman, R. F. Schwitters, Hamad Ahmed, Andrei Gritsan, A. M. Lutz, S. Passaggio, C. Bünger, A. Jawahery, A. P. Onuchin, G. Cibinetto, A. Palano, S. Luitz, P. Patteri, J. Va’vra, Wu S. L., M. R. Convery, B. N. Ratcliff, Biplab Dey, I. M. Peruzzi, S. I. Serednyakov, F. Bianchi, S. Dittrich, and N. Arnaud
Subjects: Physics, Particle physics, Muon, Annihilation, Meson, Electron–positron annihilation, 0103 physical sciences, General Physics and Astronomy, Electron, 010306 general physics, 01 natural sciences
Abstract: We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type D^{0}→h^{'-}h^{-}l^{'+}l^{+} and D^{0}→h^{'-}h^{+}l^{'±}l^{∓}, where h and h^{'} represent a K or π meson and l and l^{'} an electron or muon. The analysis is based on 468 fb^{-1} of e^{+}e^{-} annihilation data collected at or close to the ϒ(4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory. No significant signal is observed for any of the twelve modes, and we establish 90% confidence level upper limits on the branching fractions in the range (1.0-30.6)×10^{-7}. The limits are between 1 and 3 orders of magnitude more stringent than previous measurements.
Published: 2020

18. Measurements of the Absolute Branching Fractions of B± →k±Xc c

Author: A. J. Edwards, F. Simonetto, W. F. Mader, R. H. Schindler, Fry, Shanhui Fan, I Eschrich, W. Menges, M Bruinsma, K. Suzuki, T Schalk, R. Kroeger, J. M. Bauer, D. Boutigny, H. Nicholson, A Petzold, Marcello Rotondo, AT Watson, Martino Margoni, H. U. Flaecher, L. M. Cremaldi, M. Verderi, A Pompili, T. Hadig, U. Mallik, S. K. Swain, KS Chaisanguanthum, Muller, J. F. Strube, Roberto Calabrese, AN Yushkov, E. Gabathuler, Jordan Nash, O. Hamon, R. R. Kofler, M. Krishnamurthy, C. M. Cormack, AE Blinov, WH Toki, R Schwierz, Heiko Lacker, M Battaglia, D. G. Hitlin, S. Ye, M Andreotti, T. C. Petersen, Corrado Angelini, W. Gradl, Stephen Sekula, G Mancinelli, F. C. Porter, R. Ter-Antonyan, R. C. Field, D. E. Wagoner, W. O. Ruddick, Gabriele Simi, A. Buzzo, A. K. Mohapatra, D. J. Payne, J Kadyk, L Piemontese, F. Bucci, P. Wang, ML Vetere, G Lynch, D. Côté, L. Gioi, TW Beck, P. S. Jackson, R. Godang, D. Piccolo, Tisserand, G. Therin, J Marks, W. Bhimji, Gill, Q Zeng, S. Rodier, Nicola Neri, F. Lodovico, O. L. Buchmueller, D. Su, Nicolo De Groot, Wp Vazquez, B. Cheng, Chunhui Chen, K. R. Schubert, C. L. Davis, R. Gamet, H. L. Lynch, A. Gaidot, G. P. Gopal, B. Viaud, Maurizio Pierini, M. P. Kelly, M Saleem, D. J. Bard, A. Calcaterra, J. Ocariz, R Nogowski, M. Piccolo, M. T. Allen, S. Saremi, M Mandelkern, A. W. Weidemann, Matteo Rama, D. M. Strom, Mauro Morandin, G Brandenburg, S. Playfer, C. Bozzi, M. Haire, J. C. Williams, Halyo, K. Honscheid, C. A. Chavez, C. L. Edgar, J Zhang, LT Kerth, D. Dong, DC Williams, JE Sundermann, SE Morgan, J. M. Roney, JS Minamora, Luca Lista, S. J. Gowdy, K. A. George, J. G. Smith, M. B. Nikolich, D Kirkby, C. Cartaro, A. Oyanguren, G. Batignani, R. Sacco, C. Roat, M. Benayoun, Fabio Cossutti, M. A. Mazzoni, G. Wormser, RJ Wilson, H. L. Snoek, S Curry, J. W. Gary, K. Goetzen, B. Franek, P Bloom, R. Frey, H. J. Bulten, CJ Flacco, A. M. Eisner, D. W. G. S. Leith, Nicolas Berger, D. A. Hopkins, S. M. Spanier, Vladimir Blinov, G Vasileiadis, B Lewandowski, J Kroseberg, C. Gatto, A Santroni, S Tosi, C. K. Lae, D. B. MacFarlane, R. J. Barlow, G. Rizzo, E. P. Solodov, D Altenburg, W. N. Cottingham, N. Chevalier, M. Posocco, Marco Bomben, R. Barate, D. Bernard, JD Richman, C Thiebaux, J.J. Reidy, R. Bula, T. Cuhadar-Donszelmann, T. Schroeder, Johnson, G. Schott, M. H. Kelsey, T. Abe, J. Stelzer, C. Touramanis, J. P. Burke, E. Torrence, Giuseppe Della Ricca, Sw. Banerjee, M Pappagallo, Abner Soffer, C. Hearty, R. Claus, S. Prell, Matteo Negrini, Thomas Allmendinger, C. Dallapiccola, J. J. Hollar, Y. P. Lau, D. Fortin, J. A. McKenna, Kyung-Soo Yi, G. Calderini, Douglas Wright, P Lund, James H Cochran, R. Cenci, T. Glanzman, R. L. Flack, HP Paar, J. L. Ritchie, EA Eckhart, S. Bettarini, A. J.S. Smith, Philippe Grenier, M Macri, J. M. LoSecco, E Feltresi, A. Zallo, J. Libby, AB Breon, FS Tehrani, G. Grosdidier, I. J. Forster, D. J. Summers, M. Spitznagel, B Stugu, S. F. Ganzhur, H. R. Band, B Spaan, H. B. Crawley, I. Kitayama, S. I. Serednyakov, MG Wilson, M Morii, KE Ford, D Best, Yuri Skovpen, R. J. Sobie, G. W. London, Y Groysman, J. C. Dingfelder, N. B. Sinev, BL Hartfiel, R. Liu, Daniele Del Re, Luth, A. Perazzo, C. Voena, L. Vitale, W. R. Innes, RG Jacobsen, E Chen, Alam, T. S. Mattison, D. A. Sanders, F. Martinez-Vidal, J. Chauveau, M. J.J. John, R. Aleksan, S. B. Zain, G. P. Dubois-Felsmann, H. A. Neal, S. Willocq, D. Monorchio, I Ofte, K Peters, T. B. Moore, Q. K. Wong, B. T. Meadows, J. Biesiada, A Samuel, V. B. Koptchev, V. E. Ozcan, S. A. Majewski, A Seiden, P. Tan, C. Hast, D. J. Lange, G. Piredda, A. Dvoretskii, W. Kozanecki, M. Legendre, GS Abrams, G. Raven, T. Held, C. Lu, D. Judd, Y. B. Pan, D. Bettoni, M. Lu, Dmytro Kovalskyi, J. I. Yi, C. M. Brown, Y Xie, H. W. Zhao, P. D. Dauncey, J. P. Lees, R. Kowalewski, A. Hocker, S. Ahmed, D. Gamba, A. Lusiani, F. Gallo, RK Mommsen, P. R. Burchat, S Schrenk, M. Pioppi, F. Polci, N. S. Knecht, V. P. Druzhinin, Y Karyotakis, W. J. Wisniewski, A. Stocchi, F. R. Wappler, CM Hawkes, F. Forti, P. C. Kim, A. Lazzaro, J. E. Brau, Tim Adye, X. Giroux, M. Carpinelli, M. T. Naisbit, Lydia Roos, M. Morganti, C. Voci, Eleonora Luppi, R. Baldini-Ferroli, J. Schwiening, Julie Malcles, R. D. Kass, Q. H. Guo, C. De La Vaissiere, H. Kagan, H. Schröder, R. J. Parry, D. Dujmic, Tetiana Hrynova, K. K. Gan, D. A. Roberts, Anders Ryd, N. D. Qi, J. M. Thompson, C. Yeche, A. D'Orazio, F. E. Taylor, A Chen, T. M. Hong, MA Mazur, BA Schumm, D. Aston, C Campagnari, GH de Monchenault, M. H. Schune, Guglielmo De Nardo, G. Marchiori, U. Uwer, BC Shen, J Wu, M. Zito, NA Roe, C. P. O'Grady, M Dickopp, W. Dunwoodie, PJ Clark, M. A. Baak, M Chao, A. V. Telnov, WT Ford, J. Olsen, E. O. Olaiya, M. A. Saeed, W. T. Meyer, Y. S. Zhu, A. Mihalyi, Eyges, R. Stroili, J Schubert, Wagner, Hyunyong Kim, Maurizio Biasini, N. R. Barlow, Pierluigi Paolucci, U Nauenberg, Kenji Hamano, T.R. McMahon, C Buchanan, TJ Harrison, Ulrik Egede, Matthew J. Graham, M. Fritsch, T Piatenko, F Couderc, RW Kadel, S. S. Hertzbach, N. Danielson, R. Messner, A Zghiche, R. Faccini, Sokoloff, F. Ferrarotto, A. J. Lankford, Marcella Bona, AD Bukin, C. Patrignani, A. Cunha, F. Palombo, D Brown, E. Paoloni, F. Salvatore, JF Hirschauer, EJ Hill, S. Pacetti, Owen Rosser Long, G. B. Mohanty, L. Wilden, A. Kreisel, Kefeng Wang, F. Galeazzi, R. Cowan, Gabriele Benelli, P. Taras, Lepeltier, R. F. Schwitters, Mohamed H. Ahmed, M. L. Kocian, P. Roudeau, P. D. Jackson, AJ Hart, A. P. Onuchin, R. K. Yamamoto, J. J. Back, G. Finocchiaro, L Zhang, H. Staengle, PJ Oddone, W Verkerke, J Brose, LM Mir, E. Grauges, X. R. Chen, S. Brunet, M. G. Green, Adrian John Bevan, R. Bartoldus, P Kyberd, Zongfu Yu, G. A. Cowan, M. Gaspero, J. P. Coleman, G. Eigen, M Bondioli, C. T. Potter, A. Snyder, Mario Giorgi, Monge, Michael Steinke, S. Morganti, L. Gladney, M. J. Charles, R. Eckmann, F. F. Wilson, L. Bosisio, S Otto, Sridhara Dasu, M. Davier, G Kukartsev, W Roethel, Karsten Koeneke, K. A. Ulmer, Francesco Fabozzi, G. R. Bonneaud, A. J.R. Weinstein, Colin Jessop, Mousumi Datta, R. Prepost, Andrei Gritsan, I Narsky, SD Foulkes, HK Hadavand, Azzolini, A. Khan, F. Bellini, T. Orimoto, M Barrett, A. Olivas, M. Weaver, G. Vasseur, K. T. Flood, M. L. Perl, J. T. Boyd, Joseph Izen, K. C. Schofield, A. Roodman, R Andreassen, T. Pulliam, S Rahatlou, J. A. Ernst, H. Briand, Roland Waldi, F. Ferroni, N. Cavallo, L. Lanceri, Stéphane Plaszczynski, D. A. Bowerman, Paul Fraser Harrison, P. M. Patel, S. J. Chen, J.H. Panetta, X. Chai, M. K. Sullivan, A. Jawahery, Y. G. Kolomensky, Gabriella Sciolla, W. M. Bugg, G. Cibinetto, B. N. Ratcliff, Emanuele Di Marco, RN Cahn, P Spradlin, Eschenburg, B. A. Petersen, J. Dorfan, A. M. Boyarski, C. L. Brown, JW Berryhill, MT Ronan, P. E. Kutter, P. K. Behera, Ph Leruste, F Muheim, G.J. Wagner, N. Arnaud, B. Mayer, A. K. Yarritu, Convery, I. M. Peruzzi, C. H. Cheng, Luigi Del Buono, B. Aubert, E Robutti, H. Marsiske, R. de Sangro, S. L. Wu, RS Dubitzky, F. Bianchi, A. E. Rubin, N. van Bakel, C. C. Young, F. Diberder, J. Allison, WA Wenzel, A. M. Lutz, Poireau, Hui Li, G. Rong, Sergio Grancagnolo, R Contri, S. Passaggio, R. S. Panvini, M Pelizaeus, Wilson, W. D. Hulsbergen, Xingguo Li, M. V. Purohit, J. Albert, Bruce Mellado, Klose, M. Wittgen, E Charles, Pieter David, Ziegler, V. B. Golubev, Roberto Covarelli, A. Palano, G. Cavoto, David Hutchcroft, Bryan Dahmes, S. Luitz, S Schenk, J. Va’vra, Sharma, D. Hufnagel, Peter Elmer, DP Stoker, E Won, A. M. Eichenbaum, S. Ricciardi, L Teodorescu, C. A. Heusch, E. A. Kravchenko, Crisostomo Sciacca, CT Day, J. C. Chen, P. Patteri, R Capra, D. Wright, B. Bhuyan, B. G. Fulsom, X. C. Lou, J. J. Walsh, A. M. Rahimi, T. E. Latham, D. N. Brown, Gaillard, G. D. Lafferty, T Brandt, M Pripstein, Markus Cristinziani, O. Igonkina, F. X. Yumiceva, J Button-Shafer, S. H. Robertson, G Nesom, S. Emery, G. Blaylock, Herbert Koch, A Hauke, Lombardo, F. Blanc, A. Satpathy, M. C. Hodgkinson, G. Graziani, E. I. Rosenberg, W. S. Lockman, A. A. Salnikov, M. C. Simani, F. Anulli, S. Dittongo, U Langenegger, Lees J.P., Poireau V., Tisserand V., Grauges E., Palano A., Eigen G., Brown D.N., Kolomensky Y.G., Fritsch M., Koch H., Schroeder T., Cheaib R., Hearty C., Mattison T.S., McKenna J.A., So R.Y., Blinov V.E., Buzykaev A.R., Druzhinin V.P., Golubev V.B., Kozyrev E.A., Kravchenko E.A., Onuchin A.P., Serednyakov S.I., Skovpen Y.I., Solodov E.P., Todyshev K.Y., Lankford A.J., Dey B., Gary J.W., Long O., Eisner A.M., Lockman W.S., Panduro Vazquez W., Chao D.S., Cheng C.H., Echenard B., Flood K.T., Hitlin D.G., Kim J., Li Y., Miyashita T.S., Ongmongkolkul P., Porter F.C., Rohrken M., Huard Z., Meadows B.T., Pushpawela B.G., Sokoloff M.D., Sun L., Smith J.G., Wagner S.R., Bernard D., Verderi M., Bettoni D., Bozzi C., Calabrese R., Cibinetto G., Fioravanti E., Garzia I., Luppi E., Santoro V., Calcaterra A., De Sangro R., Finocchiaro G., Martellotti S., Patteri P., Peruzzi I.M., Piccolo M., Rotondo M., Zallo A., Passaggio S., Patrignani C., Shuve B.J., Lacker H.M., Bhuyan B., Mallik U., Chen C., Cochran J., Prell S., Gritsan A.V., Arnaud N., Davier M., Le Diberder F., Lutz A.M., Wormser G., Lange D.J., Wright D.M., Coleman J.P., Gabathuler E., Hutchcroft D.E., Payne D.J., Touramanis C., Bevan A.J., Di Lodovico F., Sacco R., Cowan G., Banerjee S., Davis C.L., Denig A.G., Gradl W., Griessinger K., Hafner A., Schubert K.R., Barlow R.J., Lafferty G.D., Cenci R., Jawahery A., Roberts D.A., Cowan R., Robertson S.H., Seddon R.M., Neri N., Palombo F., Cremaldi L., Godang R., Summers D.J., Taras P., De Nardo G., Sciacca C., Raven G., Jessop C.P., Losecco J.M., Honscheid K., Kass R., Gaz A., Margoni M., Posocco M., Simi G., Simonetto F., Stroili R., Akar S., Ben-Haim E., Bomben M., Bonneaud G.R., Calderini G., Chauveau J., Marchiori G., Ocariz J., Biasini M., Manoni E., Rossi A., Batignani G., Bettarini S., Carpinelli M., Casarosa G., Chrzaszcz M., Forti F., Giorgi M.A., Lusiani A., Oberhof B., Paoloni E., Rama M., Rizzo G., Walsh J.J., Zani L., Smith A.J.S., Anulli F., Faccini R., Ferrarotto F., Ferroni F., Pilloni A., Piredda G., Bunger C., Dittrich S., Grunberg O., Hess M., Leddig T., Voss C., Waldi R., Adye T., Wilson F.F., Emery S., Vasseur G., Aston D., Cartaro C., Convery M.R., Dorfan J., Dunwoodie W., Ebert M., Field R.C., Fulsom B.G., Graham M.T., Hast C., Innes W.R., Kim P., Leith D.W.G.S., Luitz S., Macfarlane D.B., Muller D.R., Neal H., Ratcliff B.N., Roodman A., Sullivan M.K., Va'Vra J., Wisniewski W.J., Purohit M.V., Wilson J.R., Randle-Conde A., Sekula S.J., Ahmed H., Bellis M., Burchat P.R., Puccio E.M.T., Alam M.S., Ernst J.A., Gorodeisky R., Guttman N., Peimer D.R., Soffer A., Spanier S.M., Ritchie J.L., Schwitters R.F., Izen J.M., Lou X.C., Bianchi F., De Mori F., Filippi A., Gamba D., Lanceri L., Vitale L., Martinez-Vidal F., Oyanguren A., Albert J., Beaulieu A., Bernlochner F.U., King G.J., Kowalewski R., Lueck T., Nugent I.M., Roney J.M., Sobie R.J., Tasneem N., Gershon T.J., Harrison P.F., Latham T.E., Prepost R., Wu S.L., Lees, J. P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D. N., Kolomensky, Y. G., Fritsch, M., Koch, H., Schroeder, T., Cheaib, R., Hearty, C., Mattison, T. S., Mckenna, J. A., So, R. Y., Blinov, V. E., Buzykaev, A. R., Druzhinin, V. P., Golubev, V. B., Kozyrev, E. A., Kravchenko, E. A., Onuchin, A. P., Serednyakov, S. I., Skovpen, Y. I., Solodov, E. P., Todyshev, K. Y., Lankford, A. J., Dey, B., Gary, J. W., Long, O., Eisner, A. M., Lockman, W. S., Panduro Vazquez, W., Chao, D. S., Cheng, C. H., Echenard, B., Flood, K. T., Hitlin, D. G., Kim, J., Li, Y., Miyashita, T. S., Ongmongkolkul, P., Porter, F. C., Rohrken, M., Huard, Z., Meadows, B. T., Pushpawela, B. G., Sokoloff, M. D., Sun, L., Smith, J. G., Wagner, S. R., Bernard, D., Verderi, M., Bettoni, D., Bozzi, C., Calabrese, R., Cibinetto, G., Fioravanti, E., Garzia, I., Luppi, E., Santoro, V., Calcaterra, A., De Sangro, R., Finocchiaro, G., Martellotti, S., Patteri, P., Peruzzi, I. M., Piccolo, M., Rotondo, M., Zallo, A., Passaggio, S., Patrignani, C., Shuve, B. J., Lacker, H. M., Bhuyan, B., Mallik, U., Chen, C., Cochran, J., Prell, S., Gritsan, A. V., Arnaud, N., Davier, M., Le Diberder, F., Lutz, A. M., Wormser, G., Lange, D. J., Wright, D. M., Coleman, J. P., Gabathuler, E., Hutchcroft, D. E., Payne, D. J., Touramanis, C., Bevan, A. J., Di Lodovico, F., Sacco, R., Cowan, G., Banerjee, S., Davis, C. L., Denig, A. G., Gradl, W., Griessinger, K., Hafner, A., Schubert, K. R., Barlow, R. J., Lafferty, G. D., Cenci, R., Jawahery, A., Roberts, D. A., Cowan, R., Robertson, S. H., Seddon, R. M., Neri, N., Palombo, F., Cremaldi, L., Godang, R., Summers, D. J., Taras, P., De Nardo, G., Sciacca, C., Raven, G., Jessop, C. P., Losecco, J. M., Honscheid, K., Kass, R., Gaz, A., Margoni, M., Posocco, M., Simi, G., Simonetto, F., Stroili, R., Akar, S., Ben-Haim, E., Bomben, M., Bonneaud, G. R., Calderini, G., Chauveau, J., Marchiori, G., Ocariz, J., Biasini, M., Manoni, E., Rossi, A., Batignani, G., Bettarini, S., Carpinelli, M., Casarosa, G., Chrzaszcz, M., Forti, F., Giorgi, M. A., Lusiani, A., Oberhof, B., Paoloni, E., Rama, M., Rizzo, G., Walsh, J. J., Zani, L., Smith, A. J. S., Anulli, F., Faccini, R., Ferrarotto, F., Ferroni, F., Pilloni, A., Piredda, G., Bunger, C., Dittrich, S., Grunberg, O., Hess, M., Leddig, T., Voss, C., Waldi, R., Adye, T., Wilson, F. F., Emery, S., Vasseur, G., Aston, D., Cartaro, C., Convery, M. R., Dorfan, J., Dunwoodie, W., Ebert, M., Field, R. C., Fulsom, B. G., Graham, M. T., Hast, C., Innes, W. R., Kim, P., Leith, D. W. G. S., Luitz, S., Macfarlane, D. B., Muller, D. R., Neal, H., Ratcliff, B. N., Roodman, A., Sullivan, M. K., Va'Vra, J., Wisniewski, W. J., Purohit, M. V., Wilson, J. R., Randle-Conde, A., Sekula, S. J., Ahmed, H., Bellis, M., Burchat, P. R., Puccio, E. M. T., Alam, M. S., Ernst, J. A., Gorodeisky, R., Guttman, N., Peimer, D. R., Soffer, A., Spanier, S. M., Ritchie, J. L., Schwitters, R. F., Izen, J. M., Lou, X. C., Bianchi, F., De Mori, F., Filippi, A., Gamba, D., Lanceri, L., Vitale, L., Martinez-Vidal, F., Oyanguren, A., Albert, J., Beaulieu, A., Bernlochner, F. U., King, G. J., Kowalewski, R., Lueck, T., Nugent, I. M., Roney, J. M., Sobie, R. J., Tasneem, N., Gershon, T. J., Harrison, P. F., Latham, T. E., Prepost, R., and Wu, S. L.
Subjects: Physics, Particle physics, Kjerne- og elementærpartikkelfysikk: 431 [VDP], Meson, 010308 nuclear & particles physics, Electron–positron annihilation, General Physics and Astronomy, BaBar experiment, Bottom meson, BaBar, PEP-II, B meson, Bottom mesons, Branching (polymer chemistry), 7. Clean energy, 01 natural sciences, Lower limit, HEP, NO, Nuclear and elementary particle physics: 431 [VDP], 0103 physical sciences, 010306 general physics, Bar (unit)
Abstract: A study of the two-body decays B±→XccK±, where Xcc refers to one charmonium state, is reported by the BABAR Collaboration using a data sample of 424 fb-1. The absolute determination of branching fractions for these decays are significantly improved compared to previous BABAR measurements. Evidence is found for the decay B+→X(3872)K+ at the 3σ level. The absolute branching fraction B[B+→X(3872)K+]=[2.1±0.6(stat)±0.3(syst)]×10-4 is measured for the first time. It follows that B[X(3872)→J/ψπ+π-]=(4.1±1.3)%, supporting the hypothesis of a molecular component for this resonance., This work is supported by the U.S. Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), Institute of High Energy Physics (China), the Commissariat `a l’Energie Atomique and Institut National de Physique Nucl´eaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (The Netherlands), the Research Council of Norway, the Ministry of Science and Technology of the Russian Federation, and the Particle Physics and Astronomy Research Council (United Kingdom). Individuals have received support from CONACyT (Mexico), the A. P. Sloan Foundation, the Research Corporation, and the Alexander von Humboldt Foundation.
Published: 2020

19. Measurement of the branching fraction for the decay KS → πμν with the KLOE detector

Author: R. Messi, Filippo Ceradini, A. Selce, Florin Sirghi, E. P. Solodov, T. Johansson, Vincenzo Patera, P.A. Lukin, Andrzej Kupsc, G. Venanzoni, P. Fermani, Paolo Ciambrone, Paweł Moskal, E. Dané, S. Parzych, S. Giovannella, Aleksander Gajos, D. Kisielewska-Kamińska, P. De Simone, D. Moricciani, Antonio Budano, E.A. Kozyrev, V. De Leo, Michał Silarski, Wojciech Krzemien, M. Berlowski, Magnus Wolke, P. Gauzzi, A. Di Domenico, P. Branchini, Paolo Santangelo, E. De Lucia, Wojciech Wiślicki, A. Passeri, M. Martini, D. Domenici, D. Babusci, A. De Santis, L. Tortora, Giuseppe Mandaglio, B. Cao, X. Kang, F. Curciarello, V. L. Ivanov, G. D'Agostini, A. Fantini, C. Bloise, E. Perez del Rio, S. Miscetti, F. Bossi, A. Di Cicco, Marco Schioppa, S. Fiore, E. Graziani, A. D'Uffizi, Eryk Czerwiński, Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D'Agostini, G., Dane, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, A., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Parzych, S., Passeri, A., Patera, V., Perez del Rio, E., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., and Wolke, M.
Subjects: Semileptonic decay, +, e, −, collisions, K, 0, meson, Nuclear and High Energy Physics, Meson, 01 natural sciences, Nuclear physics, 0103 physical sciences, e+e-,collisions, e+e, 010306 general physics, Physics, Settore FIS/01, Muon, Mass distribution, 010308 nuclear & particles physics, Branching fraction, Detector, lcsh:QC1-999, K0, mesons, Data control, High Energy Physics::Experiment, e+e− collisions, K0 meson, semileptonic decay, lcsh:Physics, collision
Abstract: Based on a sample of 300 million KS mesons produced in ϕ→KLKS decays recorded by the KLOE experiment at the DAΦNE e+e− collider we have measured the branching fraction for the decay KS→πμν. The KS mesons are identified by the interaction of KL mesons in the detector. The KS→πμν decays are selected by a boosted decision tree built with kinematic variables and by a time-of-flight measurement. Signal efficiencies are evaluated with data control samples of KL→πμν decays. A fit to the reconstructed muon mass distribution finds 7223±180 signal events. Normalising to the KS→π+π− decay events the result for the branching fraction is B(KS→πμν)=(4.56±0.11stat±0.17syst)×10−4. It is the first measurement of this decay mode and the result allows an independent determination of |Vus| and a test of the lepton-flavour universality.
Published: 2020

20. Measurement of the e+e−→ ηπ+π− cross section with the CMD-3 detector at the VEPP-2000 collider

Author: CMD-3 collaboration, S. S. Gribanov, A. S. Popov, R. R. Akhmetshin, A. N. Amirkhanov, A. V. Anisenkov, V. M. Aulchenko, V. Sh. Banzarov, N. S. Bashtovoy, D. E. Berkaev, A. E. Bondar, A. V. Bragin, S. I. Eidelman, D. A. Epifanov, L. B. Epshteyn, A. L. Erofeev, G. V. Fedotovich, S. E. Gayazov, F. J. Grancagnolo, A. A. Grebenuk, D. N. Grigoriev, F. V. Ignatov, V. L. Ivanov, S. V. Karpov, V. F. Kazanin, A. N. Kirpotin, I. A. Koop, A. A. Korobov, O. A. Kovalenko, A. N. Kozyrev, E. A. Kozyrev, P. P. Krokovny, A. E. Kuzmenko, A. S. Kuzmin, I. B. Logashenko, P. A. Lukin, K. Yu. Mikhailov, V. S. Okhapkin, A. V. Otboev, Yu. N. Pestov, G. P. Razuvaev, Yu. A. Rogovsky, A. A. Ruban, N. M. Ryskulov, A. E. Ryzhenenkov, A. V. Semenov, A. I. Senchenko, Yu. M. Shatunov, P. Yu. Shatunov, V. E. Shebalin, D. N. Shemyakin, B. A. Shwartz, D. B. Shwartz, A. L. Sibidanov, E. P. Solodov, V. M. Titov, A. A. Talyshev, S. S. Tolmachev, A. I. Vorobiov, I. M. Zemlyansky, and Yu. V. Yudin
Subjects: Physics, Nuclear and High Energy Physics, e+-e- Experiments, Luminosity (scattering theory), Meson, 010308 nuclear & particles physics, Electron–positron annihilation, Vector meson dominance, 01 natural sciences, law.invention, Nuclear physics, Cross section (physics), law, 0103 physical sciences, lcsh:QC770-798, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Vector meson, 010306 general physics, Collider, VEPP-2000
Abstract: The cross section of the process e + e − → ηπ + π − is measured using the data collected with the CMD-3 detector at the VEPP-2000 collider in the center-of-mass energy range from 1.1 to 2.0 GeV. The decay mode η → γγ is used for η meson reconstruction in the data sample corresponding to an integrated luminosity of 78.3 pb −1. The energy dependence of the e + e − → ηπ + π − cross section is fitted within the framework of vector meson dominance in order to extract the Γ(ρ(1450) → e + e − ) B $$ \mathcal{B} $$ (ρ(1450) → ηπ + π − ) and the Γ(ρ(1700) → e + e − ) B $$ \mathcal{B} $$ (ρ(1700) → ηπ + π − ) products. Based on conservation of vector current, the analyzed data are used to test the relationship between the e + e − → ηπ + π − cross section and the spectral function in τ − → ηπ − π 0 ντ decay. The e + e − → ηπ + π − cross section obtained with the CMD-3 detector is in good agreement with the previous measurements.
Published: 2020

21. Charged particle identification with the liquid xenon calorimeter of the CMD-3 detector

Author: S. Eidelman, E. P. Solodov, A. A. Grebenuk, A.N. Kozyrev, Yu.N. Pestov, L.B. Epshteyn, D.N. Grigoriev, A.A. Korobov, A.E. Kuzmenko, Yu.V. Yudin, Alexey Anisenkov, V. L. Ivanov, N.M. Ryskulov, A.L. Erofeev, P.A. Lukin, Vassili Kazanin, A.N. Amirkhanov, D.N. Shemyakin, D.A. Epifanov, G.P. Razuvaev, V. M. Aulchenko, S.S. Tolmachev, Alexei Talyshev, P. Krokovny, S.E. Gayazov, S.S. Gribanov, A.S. Popov, A.V. Semenov, A. A. Uskov, E.A. Kozyrev, V.S. Okhapkin, A.S. Kuzmin, K.Yu. Mikhailov, F.V. Ignatov, Sergei V. Karpov, A.E. Bondar, A.V. Bragin, I.B. Logashenko, A. I. Vorobiov, A.E. Ryzhenenkov, B. Shwartz, V.E. Shebalin, A.A. Ruban, G.V. Fedotovich, V.M. Titov, N.S. Bashtovoy, and R.R. Akhmetshin
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Muon, Calorimeter (particle physics), Physics::Instrumentation and Detectors, chemistry.chemical_element, Particle identification, Charged particle, law.invention, Nuclear physics, Xenon, Pion, chemistry, law, High Energy Physics::Experiment, Collider, Instrumentation
Abstract: The paper describes a method of the charged particle identification, developed for the CMD-3 detector, installed at the VEPP-2000 e + e − collider. The method is based on application of boosted decision trees classifiers, trained for the optimal separation of electrons, muons , pions and kaons in the momentum range from 100 to 1200 MeV / c . The input variables for the classifiers are linear combinations of the energy depositions of charged particles in 12 layers of the liquid xenon calorimeter of the CMD-3. The event samples for training of the classifiers are taken from the simulation. Various issues of the calorimeter strip channels response simulation and their calibration are considered. Application of the method is illustrated by the examples of separation of the e + e − ( γ ) and π + π − ( γ ) final states and of selection of the K + K − final state at high energies.
Published: 2021

22. Study of the process e + e − → π + π − π 0 η in the c.m. energy range 1394–2005 MeV with the CMD-3 detector

Author: L.B. Epshteyn, A.E. Bondar, S. Eidelman, A.N. Kozyrev, Yu. A. Rogovsky, I.B. Logashenko, A.A. Ruban, G.P. Razuvaev, A. V. Otboev, Alexey Anisenkov, A.S. Kuzmin, A.S. Popov, Alexei Talyshev, A.L. Erofeev, D.N. Grigoriev, V. L. Ivanov, A. N. Kirpotin, R.R. Akhmetshin, B. Shwartz, E.A. Kozyrev, D.A. Epifanov, K.Yu. Mikhailov, F.V. Ignatov, Yu. M. Shatunov, A.E. Ryzhenenkov, V.S. Okhapkin, P. Krokovny, Ivan Koop, D. E. Berkaev, A.A. Korobov, V. M. Aulchenko, A.V. Bragin, Vassili Kazanin, N.S. Bashtovoy, D. B. Shwartz, V.M. Titov, V.E. Shebalin, P. Yu. Shatunov, A. I. Vorobiov, G.V. Fedotovich, P.A. Lukin, Yu.V. Yudin, A. I. Senchenko, S.E. Gayazov, S.S. Gribanov, D.N. Shemyakin, V.Sh. Banzarov, A.N. Amirkhanov, A.L. Sibidanov, N.M. Ryskulov, Sergei V. Karpov, E. P. Solodov, A. A. Grebenuk, Yu.N. Pestov, A.E. Kuzmenko, and Ilya Zemlyansky
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Electron–positron annihilation, Detector, Analytical chemistry, 01 natural sciences, lcsh:QC1-999, Lower energy, High Energy Physics - Experiment, law.invention, law, 0103 physical sciences, Pi, Intermediate state, High Energy Physics::Experiment, 010306 general physics, Collider, lcsh:Physics, Energy (signal processing)
Abstract: The cross section of the process $e^+e^- \to \pi^+\pi^-\pi^0\eta$ has been measured using a data sample of 21.8 pb$^{-1}$ collected with the CMD-3 detector at the VEPP-2000 $e^+e^-$ collider. 2769$\pm$95 signal events have been selected in the center-of-mass energy range 1394--2005 MeV. The production dynamics is dominated by the $\omega(782)\eta$ and $\phi(1020)\eta$ intermediate states in the lower energy range, and by the $a_0(980)\rho(770)$ intermediate state at higher energies., Comment: 20 pages, 11 figures, 2 tables
Published: 2017

23. Extraction of form Factors from a Four-Dimensional Angular Analysis of B¯→D*ℓ−ν¯ℓ

Author: V. B. Golubev, T. E. Latham, M. Carpinelli, D. B. MacFarlane, M. Rama, M. Rotondo, G. De Nardo, M. Röhrken, J. L. Ritchie, W. R. Innes, R. Y. So, A. Roodman, R. Sacco, Yu G. Kolomensky, J. P. Lees, R. M. Seddon, A. J.S. Smith, Roland Waldi, F. Ferroni, J. Dorfan, N. Tasneem, V. Santoro, Simon Akar, C. Bünger, J. J. Walsh, E. A. Kozyrev, B. T. Meadows, G. Raven, Paul Fraser Harrison, M. D. Sokoloff, P. R. Burchat, H. A. Neal, G. Casarosa, W. J. Wisniewski, D. N. Brown, Ju-Young Kim, Stephen Robert Wagner, Aidan Randle-Conde, G. R. Bonneaud, B. Bhuyan, A. Jawahery, R. Kowalewski, P. Ongmongkolkul, A. P. Onuchin, B. G. Fulsom, G. J. King, G. Cibinetto, M. K. Sullivan, S. Martellotti, C. H. Cheng, James R. Wilson, Andrei Gritsan, R. Gorodeisky, D. A. Roberts, V. Poireau, A. Hafner, E. M. T. Puccio, R. de Sangro, S. L. Wu, M. Piccolo, I. M. Nugent, R. Calabrese, G. Batignani, Crisostomo Sciacca, G. Rizzo, G. D. Lafferty, E. Ben-Haim, D. S. Chao, A. M. Lutz, A. R. Buzykaev, M. S. Alam, M. Davier, S. Passaggio, M. V. Purohit, S. H. Robertson, S. Emery, J. Albert, A. Beaulieu, J. Chauveau, F. De Mori, A. Palano, Herbert Koch, Heiko Lacker, J. M. Roney, S. Luitz, P. Patteri, J. Va’vra, A. M. Rossi, Joseph Izen, K. Griessinger, W. Dunwoodie, J. Ocariz, E. Fioravanti, J. G. Smith, G. Eigen, Florian Urs Bernlochner, F. Palombo, T. Lueck, M. Ebert, K. R. Schubert, Stephen Sekula, J. W. Gary, Abner Soffer, T. S. Miyashita, R. Cheaib, V. P. Druzhinin, C. Bozzi, K. Honscheid, V. E. Blinov, J. M. LoSecco, Z. C. Huard, W. Panduro Vazquez, F. Di Lodovico, D. J. Payne, R. J. Barlow, Tim Adye, B. G. Pushpawela, R. D. Kass, P. Taras, E. P. Solodov, M. Posocco, T. S. Mattison, Alessandro Pilloni, W. S. Lockman, D. R. Peimer, C. Hast, D. J. Lange, G. Piredda, F. Anulli, A. Filippi, J. A. McKenna, D. W. G. S. Leith, Alessandro Gaz, G. Calderini, E. Paoloni, R. Cowan, D. Gamba, J. P. Coleman, M. Bellis, Martino Margoni, T. J. Gershon, Maurizio Biasini, R. F. Schwitters, Owen Rosser Long, K. Yu Todyshev, R. Stroili, L. Sun, A. Oyanguren, span>B ar, Adrian John Bevan, F. Simonetto, S. Prell, I. Garzia, James H Cochran, A. Lusiani, C. Touramanis, C. L. Davis, X. C. Lou, R. Godang, P. C. Kim, O. Grünberg, M. Heß, M. Fritsch, R. Cenci, A. Zallo, Yu I. Skovpen, C. Hearty, Elisa Manoni, B. Echenard, D. J. Summers, D. Aston, D. Bernard, M. Bomben, R. J. Sobie, L. Vitale, F. Martinez-Vidal, Dominik Müller, span, N. Guttman, E. Luppi, M. T. Graham, Colin Jessop, R. Prepost, I. M. Peruzzi, G. Marchiori, E. A. Kravchenko, S. I. Serednyakov, G. Vasseur, K. T. Flood, F. Bianchi, J. A. Ernst, Douglas Wright, S. Dittrich, E. Gabathuler, F. C. Porter, E. Grauges, L. Zani, D. E. Hutchcroft, T. Leddig, W. Gradl, Mario Giorgi, R. Faccini, M. Chrzaszcz, M. R. Convery, C. Voß, F. Ferrarotto, A. J. Lankford, F. Le Diberder, A. M. Eisner, L. Lanceri, B. N. Ratcliff, Sw. Banerjee, Biplab Dey, G. Simi, Hamad Ahmed, D. Bettoni, N. Arnaud, A. Calcaterra, C. Cartaro, G. Finocchiaro, C. Patrignani, V. Tisserand, A. G. Denig, S. Bettarini, F. F. Wilson, B. Oberhof, G. A. Cowan, C. H. Chen, S. M. Spanier, G. Wormser, Y. Li, M. Verderi, T. Schroeder, U. Mallik, N. Neri, L. M. Cremaldi, D. G. Hitlin, R. C. Field, and F. Forti
Subjects: Physics, Quantum chromodynamics, Semileptonic decay, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Crossing, Form factor (quantum field theory), General Physics and Astronomy, 01 natural sciences, 0103 physical sciences, High Energy Physics::Experiment, B meson, 010306 general physics
Abstract: An angular analysis of the decay B[over ¯]→D^{*}l^{-}ν[over ¯]_{l}, l∈{e,μ}, is reported using the full e^{+}e^{-} collision data set collected by the BABAR experiment at the ϒ(4S) resonance. One B meson from the ϒ(4S)→BB[over ¯] decay is fully reconstructed in a hadronic decay mode, which constrains the kinematics and provides a determination of the neutrino momentum vector. The kinematics of the semileptonic decay is described by the dilepton mass squared, q^{2}, and three angles. The first unbinned fit to the full four-dimensional decay rate in the standard model is performed in the so-called Boyd-Grinstein-Lebed approach, which employs a generic q^{2} parametrization of the underlying form factors based on crossing symmetry, analyticity, and QCD dispersion relations for the amplitudes. A fit using the more model-dependent Caprini-Lellouch-Neubert (CLN) approach is performed as well. Our form factor shapes show deviations from previous fits based on the CLN parametrization. The latest form factors also provide an updated prediction for the branching fraction ratio R(D^{*})≡B(B[over ¯]→D^{*}τ^{-}ν[over ¯]_{τ})/B(B[over ¯]→D^{*}l^{-}ν[over ¯]_{l})=0.253±0.005. Finally, using the well-measured branching fraction for the B[over ¯]→D^{*}l^{-}ν[over ¯]_{l} decay, a value of |V_{cb}|=(38.36±0.90)×10^{-3} is obtained that is consistent with the current world average for exclusive B[over ¯]→D^{(*)}l^{-}ν[over ¯]_{l} decays and remains in tension with the determination from inclusive semileptonic B decays to final states with charm.
Published: 2019

24. Observation of the Decay D0→K−π+e+e−

Author: C. Bünger, Stephen Sekula, A. Oyanguren, A. Jawahery, C. Bozzi, J. Chauveau, F. De Mori, K. Honscheid, E. A. Kozyrev, N. Tasneem, Heiko Lacker, Aidan Randle-Conde, R. J. Barlow, G. R. Bonneaud, R. Cenci, C. Touramanis, A. Zallo, Florian Urs Bernlochner, G. Cibinetto, B. Bhuyan, F. Palombo, T. Lueck, B. G. Fulsom, E. P. Solodov, T. S. Miyashita, S. Bettarini, S. Prell, O. Grünberg, D. W. G. S. Leith, Maurizio Biasini, M. Posocco, G. Calderini, James H Cochran, J. L. Ritchie, I. M. Peruzzi, R. Gorodeisky, D. A. Roberts, S. I. Serednyakov, A. G. Denig, K. R. Schubert, Owen Rosser Long, H. A. Neal, G. Casarosa, A. M. Rossi, F. Bianchi, A. Lusiani, V. P. Druzhinin, V. Poireau, T. S. Mattison, V. B. Golubev, G. Wormser, J. A. Ernst, W. Gradl, A. Palano, T. Schroeder, A. Hafner, Joseph Izen, L. Lanceri, S. Emery, R. Y. So, M. Bellis, S. Dittrich, C. Hearty, P. Ongmongkolkul, C. Hast, D. J. Lange, G. Piredda, W. J. Wisniewski, E. M. T. Puccio, A. R. Buzykaev, M. S. Alam, M. T. Graham, Eleonora Luppi, M. Piccolo, A. P. Onuchin, A. Beaulieu, S. Martellotti, M. Carpinelli, L. M. Cremaldi, J. M. Roney, L. Sun, T. J. Gershon, B. Echenard, James R. Wilson, G. Batignani, Z. C. Huard, W. Panduro Vazquez, G. J. King, S. Luitz, D. Bernard, P. C. Kim, M. V. Purohit, D. J. Summers, P. Patteri, D. G. Hitlin, W. R. Innes, R. F. Schwitters, J. Va’vra, E. A. Kravchenko, J. Albert, A. Filippi, Elisa Manoni, Colin Jessop, R. Prepost, D. Aston, J. G. Smith, R. C. Field, E. Ben-Haim, Adrian John Bevan, F. Forti, W. S. Lockman, Crisostomo Sciacca, F. Anulli, W. Dunwoodie, R. Cowan, J. Dorfan, J. J. Walsh, Y. Li, A. M. Eisner, I. M. Nugent, Alessandro Gaz, A. Calcaterra, i> ar, B. G. Pushpawela, Tim Adye, R. Sacco, D. N. Brown, A. M. Lutz, R. D. Kass, M. Bomben, R. J. Sobie, G. Finocchiaro, Sw. Banerjee, C. H. Cheng, T. E. Latham, S. H. Robertson, L. Vitale, F. Di Lodovico, G. Eigen, R. de Sangro, S. Passaggio, S. L. Wu, R. Faccini, F. Ferrarotto, A. J. Lankford, F. Martinez-Vidal, C. Cartaro, Dominik Müller, J. P. Lees, D. J. Payne, Herbert Koch, F. Le Diberder, G. D. Lafferty, N. Arnaud, R. Kowalewski, M. Rotondo, F. F. Wilson, M. R. Convery, A. J.S. Smith, Yu. I. Skovpen, G. De Nardo, Abner Soffer, D. S. Chao, B. Oberhof, M. Röhrken, Simon Akar, Yu G. Kolomensky, K. Griessinger, K. Yu. Todyshev, B. N. Ratcliff, M. Davier, V. Santoro, B. T. Meadows, G. Vasseur, A. Roodman, G. A. Cowan, Douglas Wright, K. T. Flood, G. Raven, R. Godang, R. M. Seddon, M. D. Sokoloff, E. Fioravanti, L. Zani, P. R. Burchat, E. Paoloni, R. Stroili, Roland Waldi, P. Taras, Alessandro Pilloni, F. Ferroni, D. R. Peimer, Roberto Calabrese, D. B. MacFarlane, D. Gamba, M. Rama, Paul Fraser Harrison, J. A. McKenna, Ju-Young Kim, Stephen Robert Wagner, Hamad Ahmed, J. Ocariz, M. K. Sullivan, N. Guttman, M. Heß, J. W. Gary, J. P. Coleman, E. Grauges, Mario Giorgi, R. Cheaib, G. Marchiori, E. Gabathuler, F. C. Porter, span> B, F. Simonetto, J. M. LoSecco, B. Dey, C. H. Chen, X. C. Lou, S. M. Spanier, Martino Margoni, M. Chrzaszcz, C. Voß, Vladimir Blinov, D. Bettoni, Andrei Gritsan, I. Garzia, D. E. Hutchcroft, C. Patrignani, G. Rizzo, V. Tisserand, T. Leddig, M. Verderi, U. Mallik, N. Neri, M. Fritsch, Gabriele Simi, C. L. Davis, and M. Ebert
Subjects: Physics, Particle physics, Annihilation, Branching fraction, 0103 physical sciences, General Physics and Astronomy, Resonance, Invariant mass, 010306 general physics, 01 natural sciences, Energy (signal processing), Standard Model
Abstract: We report the observation of the rare charm decay D^{0}→K^{-}π^{+}e^{+}e^{-}, based on 468 fb^{-1} of e^{+}e^{-} annihilation data collected at or close to the center-of-mass energy of the ϒ(4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory. We find the branching fraction in the invariant mass range 0.675
Published: 2019

25. Experimental input from $e^+e^-$ machines to hadronic contribution to muon (g-2)

Author: A.A. Korobov, Vassili Kazanin, S.E. Gayazov, A.A. Ruban, K.V. Pugachev, V. B. Golubev, A.E. Kuzmenko, E. V. Pakhtusova, A. N. Kirpotin, A. I. Senchenko, D.N. Shemyakin, V.M. Aulchenko, R.A. Litvinov, F.V. Ignatov, B.A. Shwartz, A.N. Kozyrev, A.S. Kupich, S. I. Serednyakov, A.V. Bragin, A. E. Obrazovsky, A.E. Ryzhenenkov, Aleksandr Korol, R.R. Akhmetshin, Konstantin Beloborodov, Alexey Anisenkov, P. Krokovny, A.Yu. Barnyakov, D.E. Berkaev, V.S. Okhapkin, Alexander Bogdanchikov, S.S. Gribanov, A.L. Erofeev, A.S. Kuzmin, Semen Eidelman, N. A. Melnikova, A. V. Berdyugin, N.S. Bashtovoy, D. B. Shwartz, L. V. Kardapoltsev, A.L. Sibidanov, A.A. Grebenuk, I.B. Logashenko, Yu.N. Pestov, A. A. Botov, S.V. Koshuba, S. S. Tolmachev, V. P. Druzhinin, D.N. Grigoriev, A.S. Popov, M. N. Achasov, A.N. Amirkhanov, S.V. Karpov, L.B. Epshteyn, K. A. Martin, Ilya Zemlyansky, A. V. Otboev, K.Yu. Mikhailov, N.M. Ryskulov, Yu.V. Yudin, T. V. Dimova, A.E. Bondar, Yu. M. Shatunov, G.P. Razuvaev, D.A. Epifanov, D. A. Shtol, I. K. Surin, Alexey Talyshev, E.A. Kozyrev, V.Sh. Banzarov, D.P. Kovrizhin, Alexey Kharlamov, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, P.A. Lukin, V.M. Titov, P. Yu. Shatunov, Z. K. Silagadze, G.V. Fedotovich, I. A. Koop, and E. P. Solodov
Subjects: Physics, Particle physics, Muon, 010308 nuclear & particles physics, QC1-999, Electron–positron annihilation, 0103 physical sciences, Hadron, High Energy Physics::Experiment, 010306 general physics, 01 natural sciences, Standard Model
Abstract: Precise study of the hadrons production in \bm{e^+e^-}𝐞+𝐞− annihilation at low energies provides important information about interactions of light quarks and spectroscopy of their bound states. These studies are especially important for theoretical calculations of the muon \bm{(g-2)}(𝐠−2) via the Standard Model because of the present difference between theoretical and experimental values exceeds three standard deviations. In this report we will discuss current status and recent results obtained by the CMD-3 experiment and will give a brief look to status of the BaBar and Belle II experiments.
Published: 2019

26. Search for a Stable Six-Quark State at BABAR

Author: J. Chauveau, F. De Mori, Heiko Lacker, J. L. Ritchie, Yu. I. Skovpen, S. I. Serednyakov, S. Bettarini, G. Finocchiaro, R. Y. So, K. R. Schubert, J. Dorfan, F. F. Wilson, R. Gorodeisky, D. A. Roberts, Roberto Calabrese, B. Oberhof, B. Bhuyan, K. Yu. Todyshev, P. Taras, A. Hafner, Giulia Casarosa, G. Wormser, V. B. Golubev, E. M. T. Puccio, J. Ocariz, J. W. Gary, D. B. MacFarlane, G. Rizzo, M. Rama, E. Grauges, Stefan Spanier, S. Prell, James H Cochran, N. Tasneem, Mario Giorgi, R. F. Schwitters, A. Lusiani, H. A. Neal, A. Calcaterra, R. Cheaib, W. R. Innes, A. Palano, V. P. Druzhinin, Randall Sobie, T. Schroeder, C. H. Cheng, Maurizio Biasini, D. Bettoni, C. Cartaro, Aidan Randle-Conde, Abner Soffer, R. Cenci, I. M. Peruzzi, B. Echenard, G. R. Bonneaud, Tim Adye, David Hutchcroft, J. M. LoSecco, D. Bernard, P. C. Kim, A. Zallo, R. de Sangro, B. Dey, R. D. Kass, Owen Rosser Long, S. L. Wu, S. Luitz, P. Patteri, J. J. Walsh, J. Va’vra, W. J. Wisniewski, R. Stroili, A. G. Denig, J. P. Lees, R. Godang, M. T. Graham, Eleonora Luppi, G. J. King, D. N. Brown, I. Garzia, A. R. Buzykaev, M. S. Alam, A. P. Onuchin, L. Sun, R. Sacco, David Lange, W. Dunwoodie, Y. Li, C. Patrignani, B. G. Fulsom, V. Tisserand, J. A. McKenna, Adrian John Bevan, A. Beaulieu, B. G. Pushpawela, Andrei Gritsan, A. M. Lutz, E. Paoloni, N. Arnaud, Colin Jessop, R. Prepost, G. D. Lafferty, Douglas Wright, V. Santoro, L. Zani, R. Kowalewski, L. M. Cremaldi, J. A. Ernst, W. Gradl, S. Passaggio, L. Lanceri, M. R. Convery, C. Bünger, Florian Urs Bernlochner, James R. Wilson, F. Palombo, T. Lueck, A. J.S. Smith, E. Gabathuler, A. Jawahery, F. C. Porter, M. Heß, Martino Margoni, Simon Akar, D. G. Hitlin, G. Cibinetto, G. Vasseur, K. T. Flood, E. A. Kozyrev, A. Filippi, Alessandro Pilloni, D. R. Peimer, B. N. Ratcliff, Hamad Ahmed, B. T. Meadows, G. Raven, M. V. Purohit, R. C. Field, F. Forti, M. Chrzaszcz, M. D. Sokoloff, Nicola Neri, P. R. Burchat, R. Cowan, C. Voß, J. Albert, G. Eigen, D. W. G. S. Leith, A. M. Eisner, M. Ebert, Stephen Sekula, F. Bianchi, D. Gamba, E. P. Solodov, T. S. Miyashita, S. Dittrich, G. Calderini, C. Bozzi, K. Honscheid, C. Hearty, R. J. Barlow, M. Posocco, Sw. Banerjee, S. Emery, N. Guttman, G. De Nardo, D. J. Summers, M. Bellis, G. Marchiori, M. Bomben, L. Vitale, F. Ferrarotto, A. J. Lankford, F. Le Diberder, F. Martinez-Vidal, Dominik Müller, M. Fritsch, span, G. A. Cowan, J. M. Roney, X. C. Lou, Gabriele Simi, J. G. Smith, C. L. Davis, F. Di Lodovico, D. J. Payne, Riccardo Faccini, A. Roodman, R. M. Seddon, E. Fioravanti, Roland Waldi, F. Ferroni, M. Rotondo, M. Röhrken, Paul Fraser Harrison, V. Poireau, Ju-Young Kim, M. Piccolo, G. Batignani, E. Ben-Haim, Stephen Robert Wagner, M. K. Sullivan, A. M. Rossi, Joseph Izen, S. Martellotti, M. Carpinelli, I. M. Nugent, D. S. Chao, M. Davier, Z. C. Huard, W. Panduro Vazquez, W. S. Lockman, J. P. Coleman, F. Anulli, Alessandro Gaz, S. H. Robertson, Herbert Koch, K. Griessinger, A. Oyanguren, span>B ar, C. Touramanis, T. Leddig, O. Grünberg, Elisa Manoni, D. Aston, M. Verderi, T. E. Latham, T. S. Mattison, C. Hast, G. Piredda, U. Mallik, T. J. Gershon, F. Simonetto, Yu G. Kolomensky, E. A. Kravchenko, C. H. Chen, Vladimir Blinov, Crisostomo Sciacca, P. Ongmongkolkul, Ministerio de Ciencia e Innovación (España), Lees, J, Poireau, V, Tisserand, V, Grauges, E, Palano, A, Eigen, G, Brown, D, Kolomensky, Y, Fritsch, M, Koch, H, Schroeder, T, Hearty, C, Mattison, T, Mckenna, J, So, R, Blinov, V, Buzykaev, A, Druzhinin, V, Golubev, V, Kozyrev, E, Kravchenko, E, Onuchin, A, Serednyakov, S, Skovpen, Y, Solodov, E, Todyshev, K, Lankford, A, Gary, J, Long, O, Eisner, A, Lockman, W, Panduro Vazquez, W, Chao, D, Cheng, C, Echenard, B, Flood, K, Hitlin, D, Kim, J, Li, Y, Miyashita, T, Ongmongkolkul, P, Porter, F, Rohrken, M, Huard, Z, Meadows, B, Pushpawela, B, Sokoloff, M, Sun, L, Smith, J, Wagner, S, Bernard, D, Verderi, M, Bettoni, D, Bozzi, C, Calabrese, R, Cibinetto, G, Fioravanti, E, Garzia, I, Luppi, E, Santoro, V, Calcaterra, A, De Sangro, R, Finocchiaro, G, Martellotti, S, Patteri, P, Peruzzi, I, Piccolo, M, Rotondo, M, Zallo, A, Passaggio, S, Patrignani, C, Lacker, H, Bhuyan, B, Mallik, U, Chen, C, Cochran, J, Prell, S, Gritsan, A, Arnaud, N, Davier, M, Le Diberder, F, Lutz, A, Wormser, G, Lange, D, Wright, D, Coleman, J, Gabathuler, E, Hutchcroft, D, Payne, D, Touramanis, C, Bevan, A, Di Lodovico, F, Sacco, R, Cowan, G, Banerjee, S, Davis, C, Denig, A, Gradl, W, Griessinger, K, Hafner, A, Schubert, K, Barlow, R, Lafferty, G, Cenci, R, Jawahery, A, Roberts, D, Cowan, R, Robertson, S, Seddon, R, Dey, B, Neri, N, Palombo, F, Cheaib, R, Cremaldi, L, Godang, R, Summers, D, Taras, P, De Nardo, G, Sciacca, C, Raven, G, Jessop, C, Losecco, J, Honscheid, K, Kass, R, Gaz, A, Margoni, M, Posocco, M, Simi, G, Simonetto, F, Stroili, R, Akar, S, Ben-Haim, E, Bomben, M, Bonneaud, G, Calderini, G, Chauveau, J, Marchiori, G, Ocariz, J, Biasini, M, Manoni, E, Rossi, A, Batignani, G, Bettarini, S, Carpinelli, M, Casarosa, G, Chrzaszcz, M, Forti, F, Giorgi, M, Lusiani, A, Oberhof, B, Paoloni, E, Rama, M, Rizzo, G, Walsh, J, Zani, L, Smith, A, Anulli, F, Faccini, R, Ferrarotto, F, Ferroni, F, Pilloni, A, Piredda, G, Bunger, C, Dittrich, S, Grunberg, O, Hess, M, Leddig, T, Voss, C, Waldi, R, Adye, T, Wilson, F, Emery, S, Vasseur, G, Aston, D, Cartaro, C, Convery, M, Dorfan, J, Dunwoodie, W, Ebert, M, Field, R, Fulsom, B, Graham, M, Hast, C, Innes, W, Kim, P, Leith, D, Luitz, S, Macfarlane, D, Muller, D, Neal, H, Ratcliff, B, Roodman, A, Sullivan, M, Va'Vra, J, Wisniewski, W, Purohit, M, Wilson, J, Randle-Conde, A, Sekula, S, Ahmed, H, Bellis, M, Burchat, P, Puccio, E, Alam, M, Ernst, J, Gorodeisky, R, Guttman, N, Peimer, D, Soffer, A, Spanier, S, Ritchie, J, Schwitters, R, Izen, J, Lou, X, Bianchi, F, De Mori, F, Filippi, A, Gamba, D, Lanceri, L, Vitale, L, Martinez-Vidal, F, Oyanguren, A, Albert, J, Beaulieu, A, Bernlochner, F, King, G, Kowalewski, R, Lueck, T, Nugent, I, Roney, J, Sobie, R, Tasneem, N, Gershon, T, Harrison, P, Latham, T, Prepost, R, Wu, S, Lees, J. P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D. N., Kolomensky, Yu. G., Fritsch, M., Koch, H., Schroeder, T., Hearty, C., Mattison, T. S., Mckenna, J. A., So, R. Y., Blinov, V. E., Buzykaev, A. R., Druzhinin, V. P., Golubev, V. B., Kozyrev, E. A., Kravchenko, E. A., Onuchin, A. P., Serednyakov, S. I., Skovpen, Y. I., Solodov, E. P., Todyshev, K. Y., Lankford, A. J., Gary, J. W., Long, O., Eisner, A. M., Lockman, W. S., Panduro Vazquez, W., Chao, D. S., Cheng, C. H., Echenard, B., Flood, K. T., Hitlin, D. G., Kim, J., Li, Y., Miyashita, T. S., Ongmongkolkul, P., Porter, F. C., Rohrken, M., Huard, Z., Meadows, B. T., Pushpawela, B. G., Sokoloff, M. D., Sun, L., Smith, J. G., Wagner, S. R., Bernard, D., Verderi, M., Bettoni, D., Bozzi, C., Calabrese, R., Cibinetto, G., Fioravanti, E., Garzia, I., Luppi, E., Santoro, V., Calcaterra, A., De Sangro, R., Finocchiaro, G., Martellotti, S., Patteri, P., Peruzzi, I. M., Piccolo, M., Rotondo, M., Zallo, A., Passaggio, S., Patrignani, C., Lacker, H. M., Bhuyan, B., Mallik, U., Chen, C., Cochran, J., Prell, S., Gritsan, A. V., Arnaud, N., Davier, M., Le Diberder, F., Lutz, A. M., Wormser, G., Lange, D. J., Wright, D. M., Coleman, J. P., Gabathuler, E., Hutchcroft, D. E., Payne, D. J., Touramanis, C., Bevan, A. J., Di Lodovico, F., Sacco, R., Cowan, G., Banerjee, S., Davis, C. L., Denig, A. G., Gradl, W., Griessinger, K., Hafner, A., Schubert, K. R., Barlow, R. J., Lafferty, G. D., Cenci, R., Jawahery, A., Roberts, D. A., Cowan, R., Robertson, S. H., Seddon, R. M., Dey, B., Neri, N., Palombo, F., Cheaib, R., Cremaldi, L., Godang, R., Summers, D. J., Taras, P., De Nardo, G., Sciacca, C., Raven, G., Jessop, C. P., Losecco, J. M., Honscheid, K., Kass, R., Gaz, A., Margoni, M., Posocco, M., Simi, G., Simonetto, F., Stroili, R., Akar, S., Ben-Haim, E., Bomben, M., Bonneaud, G. R., Calderini, G., Chauveau, J., Marchiori, G., Ocariz, J., Biasini, M., Manoni, E., Rossi, A., Batignani, G., Bettarini, S., Carpinelli, M., Casarosa, G., Chrzaszcz, M., Forti, F., Giorgi, M. A., Lusiani, A., Oberhof, B., Paoloni, E., Rama, M., Rizzo, G., Walsh, J. J., Zani, L., Smith, A. J. S., Anulli, F., Faccini, R., Ferrarotto, F., Ferroni, F., Pilloni, A., Piredda, G., Bunger, C., Dittrich, S., Grunberg, O., Hess, M., Leddig, T., Voss, C., Waldi, R., Adye, T., Wilson, F. F., Emery, S., Vasseur, G., Aston, D., Cartaro, C., Convery, M. R., Dorfan, J., Dunwoodie, W., Ebert, M., Field, R. C., Fulsom, B. G., Graham, M. T., Hast, C., Innes, W. R., Kim, P., Leith, D. W. G. S., Luitz, S., Macfarlane, D. B., Muller, D. R., Neal, H., Ratcliff, B. N., Roodman, A., Sullivan, M. K., Va'Vra, J., Wisniewski, W. J., Purohit, M. V., Wilson, J. R., Randle-Conde, A., Sekula, S. J., Ahmed, H., Bellis, M., Burchat, P. R., Puccio, E. M. T., Alam, M. S., Ernst, J. A., Gorodeisky, R., Guttman, N., Peimer, D. R., Soffer, A., Spanier, S. M., Ritchie, J. L., Schwitters, R. F., Izen, J. M., Lou, X. C., Bianchi, F., De Mori, F., Filippi, A., Gamba, D., Lanceri, L., Vitale, L., Martinez-Vidal, F., Oyanguren, A., Albert, J., Beaulieu, A., Bernlochner, F. U., King, G. J., Kowalewski, R., Lueck, T., Nugent, I. M., Roney, J. M., Sobie, R. J., Tasneem, N., Gershon, T. J., Harrison, P. F., Latham, T. E., Prepost, R., Wu, S. L., Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Département de Physique des Particules (ex SPP) (DPP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, BaBar, Lees J.P., Poireau V., Tisserand V., Grauges E., Palano A., Eigen G., Brown D.N., Kolomensky Yu.G., Fritsch M., Koch H., Schroeder T., Hearty C., Mattison T.S., McKenna J.A., So R.Y., Blinov V.E., Buzykaev A.R., Druzhinin V.P., Golubev V.B., Kozyrev E.A., Kravchenko E.A., Onuchin A.P., Serednyakov S.I., Skovpen Y.I., Solodov E.P., Todyshev K.Y., Lankford A.J., Gary J.W., Long O., Eisner A.M., Lockman W.S., Panduro Vazquez W., Chao D.S., Cheng C.H., Echenard B., Flood K.T., Hitlin D.G., Kim J., Li Y., Miyashita T.S., Ongmongkolkul P., Porter F.C., Rohrken M., Huard Z., Meadows B.T., Pushpawela B.G., Sokoloff M.D., Sun L., Smith J.G., Wagner S.R., Bernard D., Verderi M., Bettoni D., Bozzi C., Calabrese R., Cibinetto G., Fioravanti E., Garzia I., Luppi E., Santoro V., Calcaterra A., De Sangro R., Finocchiaro G., Martellotti S., Patteri P., Peruzzi I.M., Piccolo M., Rotondo M., Zallo A., Passaggio S., Patrignani C., Lacker H.M., Bhuyan B., Mallik U., Chen C., Cochran J., Prell S., Gritsan A.V., Arnaud N., Davier M., Le Diberder F., Lutz A.M., Wormser G., Lange D.J., Wright D.M., Coleman J.P., Gabathuler E., Hutchcroft D.E., Payne D.J., Touramanis C., Bevan A.J., Di Lodovico F., Sacco R., Cowan G., Banerjee S., Davis C.L., Denig A.G., Gradl W., Griessinger K., Hafner A., Schubert K.R., Barlow R.J., Lafferty G.D., Cenci R., Jawahery A., Roberts D.A., Cowan R., Robertson S.H., Seddon R.M., Dey B., Neri N., Palombo F., Cheaib R., Cremaldi L., Godang R., Summers D.J., Taras P., De Nardo G., Sciacca C., Raven G., Jessop C.P., Losecco J.M., Honscheid K., Kass R., Gaz A., Margoni M., Posocco M., Simi G., Simonetto F., Stroili R., Akar S., Ben-Haim E., Bomben M., Bonneaud G.R., Calderini G., Chauveau J., Marchiori G., Ocariz J., Biasini M., Manoni E., Rossi A., Batignani G., Bettarini S., Carpinelli M., Casarosa G., Chrzaszcz M., Forti F., Giorgi M.A., Lusiani A., Oberhof B., Paoloni E., Rama M., Rizzo G., Walsh J.J., Zani L., Smith A.J.S., Anulli F., Faccini R., Ferrarotto F., Ferroni F., Pilloni A., Piredda G., Bunger C., Dittrich S., Grunberg O., Hess M., Leddig T., Voss C., Waldi R., Adye T., Wilson F.F., Emery S., Vasseur G., Aston D., Cartaro C., Convery M.R., Dorfan J., Dunwoodie W., Ebert M., Field R.C., Fulsom B.G., Graham M.T., Hast C., Innes W.R., Kim P., Leith D.W.G.S., Luitz S., Macfarlane D.B., Muller D.R., Neal H., Ratcliff B.N., Roodman A., Sullivan M.K., Va'Vra J., Wisniewski W.J., Purohit M.V., Wilson J.R., Randle-Conde A., Sekula S.J., Ahmed H., Bellis M., Burchat P.R., Puccio E.M.T., Alam M.S., Ernst J.A., Gorodeisky R., Guttman N., Peimer D.R., Soffer A., Spanier S.M., Ritchie J.L., Schwitters R.F., Izen J.M., Lou X.C., Bianchi F., De Mori F., Filippi A., Gamba D., Lanceri L., Vitale L., Martinez-Vidal F., Oyanguren A., Albert J., Beaulieu A., Bernlochner F.U., King G.J., Kowalewski R., Lueck T., Nugent I.M., Roney J.M., Sobie R.J., Tasneem N., Gershon T.J., Harrison P.F., Latham T.E., Prepost R., Wu S.L., Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Skovpen, Yu. I., Todyshev, K. Yu., Röhrken, M., de Sangro, R., Banerjee, Sw., Bünger, C., Grünberg, O., Heß, M., Voß, C., Va’Vra, J., Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Département de Physique des Particules (ex SPP) (DPhP), Massachusetts Institute of Technology. Laboratory for Nuclear Science, and Cowan, Ray F
Subjects: Kjerne- og elementærpartikkelfysikk: 431 [VDP], branching ratio: upper limit, Electron–positron annihilation, Bound state, General Physics and Astronomy, BaBar experiment, Quarks, Upsilon(10355): rare decay, Upsilon(10355): electroproduction, Upsilon(10020): branching ratio, particle: exotic, upsilon mesons: hadronic decay, 01 natural sciences, decay, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Upsilon(10020): electroproduction, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physic, QC, QB, Exotic particles, Physics, new physics: search for, Settore FIS/01 - Fisica Sperimentale, electron positron: colliding beams, detector, limits, decay, Nuclear and elementary particle physics: 431 [VDP], Particles, Dark matter (Astronomy), Confidence level, baryon: dark matter, Upsilon(10020): rare decay, Branching fraction, Matèria fosca (Astronomia), Quark, Particle physics, Dark matter, FOS: Physical sciences, Lambda: pair production, electron positron: annihilation, Partícules (Matèria), NO, Physics and Astronomy (all), BABAR experiment, 0103 physical sciences, Atomic physic, Upsilon(10355): branching ratio, 010306 general physics, detector, dark matter: mass, State (functional analysis), stability, SLAC PEP Stor, HEP, A-stable, BaBar, Elementary Particles and Fields, High Energy Physics::Experiment, limits, experimental results
Abstract: Recent investigations have suggested that the six-quark combination uuddss could be a deeply bound state (S) that has eluded detection so far, and a potential dark matter candidate. We report the first search for a stable, doubly strange six-quark state in Upsilon -> S anti-Lambda anti-Lambda decays based on a sample of 90 million Upsilon(2S) and 110 million Upsilon(3S) decays collected by the BABAR experiment. No signal is observed, and 90% confidence level limits on the combined Upsilon(2S,3S) -> S anti-Lambda anti-Lambda branching fraction in the range (1.2-1.4)x10^-7 are derived for m_S < 2.05 GeV. These bounds set stringent limits on the existence of such exotic particles., 7 pages, 4 figures, published version
Published: 2019

27. Study of the processes e+e-→ K+K− + nπ (n = 1,2,3) with the CMD-3 detector at the VEPP-2000 electron-positron collider

Author: Yu. M. Shatunov, E. P. Solodov, A.N. Kozyrev, A.A. Korobov, D.N. Grigoriev, Alexey Talyshev, E.A. Kozyrev, Alexey Anisenkov, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, Vassili Kazanin, Yu. A. Rogovsky, N.S. Bashtovoy, Fedor Ignatov, D. B. Shwartz, A.L. Sibidanov, A. P. Lysenko, I.B. Logashenko, A.S. Popov, P.A. Lukin, A.A. Grebenuk, S.I. Eidelman, A.E. Bondar, K.Yu. Mikhailov, Yu.N. Pestov, G.P. Razuvaev, I. A. Koop, P. Krokovny, N.M. Ryskulov, D.A. Epifanov, S.V. Karpov, R.R. Akhmetshin, B.A. Shwartz, V.S. Okhapkin, A.E. Ryzhenenkov, V.M. Aulchenko, D.E. Berkaev, A.S. Kuzmin, A.N. Amirkhanov, E.A. Perevedentsev, Yu.V. Yudin, G.V. Fedotovich, A.S. Kasaev, S.S. Gribanov, A.L. Erofeev, Ilya Zemlyansky, A.V. Bragin, L.B. Epshteyn, V. S. Banzarov, S.E. Gayazov, A.A. Ruban, A.E. Kuzmenko, and D.N. Shemyakin
Subjects: Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, QC1-999, Detector, Electron, 01 natural sciences, law.invention, Nuclear physics, Positron, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, VEPP-2000, Energy (signal processing)
Abstract: The data sample collected in 2011-2013 at the c.m.s. energies between 0.32-2 GeV with the CMD-3 detector operating at the VEPP-2000 e+e− collider is analzed. The collected data corresponds to an integrated luminosity about ∼ 60pb−1. The techniques for determination of the integrated luminosity for each energy setting is described. Some preliminary results of the study of the processes e+e−→ K+ K− + nπ (n = 1,2,3) with two charged kaons in the final state are presented. These processes have several intermediate states, which are important to correctly descript the angular distributions of final particles and the cross sections dependence on the energy.
Published: 2019

28. Study of π+π−π+π− production with CMD-3 detector at the VEPP-2000 collider

Author: N.M. Ryskulov, D. B. Shwartz, A.L. Sibidanov, V.E. Shebalin, D.E. Berkaev, A.I. Vorobiov, V. L. Ivanov, E.A. Perevedentsev, S.S. Gribanov, A.L. Erofeev, A.S. Kuzmin, A.V. Bragin, Alexey Anisenkov, A.S. Kasaev, A.N. Amirkhanov, Yu.N. Pestov, A. I. Senchenko, A. V. Semenov, Yu. M. Shatunov, D.N. Shemyakin, I.B. Logashenko, L.B. Epshteyn, V.M. Titov, G.P. Razuvaev, V.M. Aulchenko, V.Sh. Banzarov, A.N. Kozyrev, Yu.V. Yudin, A.E. Bondar, V.S. Okhapkin, A.A. Grebenuk, Alexey Talyshev, E. P. Solodov, E.A. Kozyrev, A. P. Lysenko, B.A. Shwartz, A.A. Korobov, A.S. Popov, N.S. Bashtovoy, I. A. Koop, A.E. Ryzhenenkov, R.R. Akhmetshin, K.Yu. Mikhailov, Vassili Kazanin, S.I. Eidelman, A. V. Otboev, P. Krokovny, S.E. Gayazov, A.A. Ruban, D.A. Epifanov, A.E. Kuzmenko, P.A. Lukin, D.N. Grigoriev, G.V. Fedotovich, S.V. Karpov, and F.V. Ignatov
Subjects: Physics, Range (particle radiation), Luminosity (scattering theory), Muon, Anomalous magnetic dipole moment, QC1-999, Hadron, Electron, 01 natural sciences, 010305 fluids & plasmas, law.invention, Nuclear physics, law, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, VEPP-2000
Abstract: The cross section of the process e+e−→ π+π−π+π− has been measured using an integrated luminosity of 17 pb−1 collected with the CMD-3 detector in the center-of-mass energy range 650-1000 MeV. High-precision measurements of various hadronic cross sections are of great interest in relation with the problem of the muon anomalous magnetic moment g-2. This measurement can be also used to test the relation between the cross section of e+e−→ π+ π−π+ π− and the spectral function for the τ−→ π−π0π0π0 decay predicted by the conservation of vector current (CVC).
Published: 2019

29. Recent results of the hadronic cross section measurements with the CMD-3 detector at e+e− collider VEPP-2000

Author: D.E. Berkaev, S. S. Gribanov, A. N. Kirpotin, A. V. Otboev, Fedor Ignatov, D.N. Shemyakin, S.V. Karpov, E. P. Solodov, A. N. Amirkhanov, A.N. Kozyrev, I.B. Logashenko, A.S. Popov, D. B. Shwartz, A.L. Sibidanov, A. A. Korobov, Vassili Kazanin, Alexey Talyshev, A. I. Stnchenko, A.A. Grebenuk, K.Yu. Mikhailov, S. S. Tolmachev, E.A. Kozyrev, P. Krokovny, P. Yu. Shatunov, A.V. Bragin, A.L. Erofeev, L.B. Epshteyn, A.E. Kuzmenko, Alexey Anisenkov, N.S. Bashtovoy, Yu. M. Shatunov, D. Epifanov, A.S. Kuzmin, N.M. Ryskulov, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, S.E. Gayazov, B.A. Shwartz, G.V. Fedotovich, V.S. Okhapkin, A.E. Ryzhenenkov, A.E. Bondar, A.A. Ruban, R.R. Akhmetshin, I. A. Koop, Ilya Zemlyansky, Yu. N. Peatov, V. S. Banzarov, Yu.V. Yudin, G.P. Razuvaev, V.M. Titov, P.A. Lukin, S.I. Eidelman, and D.N. Grigoriev
Subjects: Physics, Luminosity (scattering theory), Meson, 010308 nuclear & particles physics, QC1-999, Hadron, Detector, Nuclear Theory, Form factor (quantum field theory), Dalitz plot, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, Nuclear Experiment, VEPP-2000
Abstract: A brief review of the recent results on the hadronic cross section measurements with the CMD-3 detector at the e+e− collider VEPP-2000 is given. Focus is made on the processes with charged kaons in multihadron events, which have a strong impact on strange meson spectroscopy and form factors that are important ingredients in the Dalitz plot analysis. Experimental data relevant to the topic are presented from the broad energy range covered by VEPP-2000 and compared to earlier measurements by the different collaborations. The analysis is based on the integrated luminosity of about 100 pb−1 collected in 2011, 2012 and 2017.
Published: 2019

30. Study of e+e− annihilation to hadrons at the VEPP-2000 collider

Author: Alexey Talyshev, S. I. Serednyakov, A.L. Sibidanov, E.A. Kozyrev, S.V. Koshuba, S.I. Eidelman, F.V. Ignatov, B.A. Shwartz, L. V. Kardapoltsev, K.V. Pugachev, Yu.N. Pestov, A.E. Ryzhenenkov, R.R. Akhmetshin, M. N. Achasov, V. P. Druzhinin, D.N. Grigoriev, V. V. Zhulanov, V.N. Zhabin, G.P. Razuvaev, A.S. Kupich, N. A. Melnikova, N.M. Ryskulov, Aleksandr Korol, R.A. Litvinov, I.B. Logashenko, I. K. Surin, A. E. Obrazovsky, P. Krokovny, A.N. Amirkhanov, A.Yu. Barnyakov, A.S. Popov, S.V. Karpov, Alexander Bogdanchikov, A.E. Bondar, K.A. Martin, V.S. Okhapkin, A.S. Kuzmin, Yu.V. Yudin, K.Yu. Mikhailov, D.A. Epifanov, E. V. Pakhtusova, Konstantin Beloborodov, Alexey Anisenkov, S.E. Gayazov, A.V. Bragin, A.A. Ruban, V.M. Aulchenko, E. P. Solodov, A.N. Kozyrev, A.A. Korobov, D. A. Shtol, A.E. Kuzmenko, Z. K. Silagadze, Vassili Kazanin, V.M. Titov, S.S. Gribanov, A.L. Erofeev, T. V. Dimova, L.B. Epshteyn, D.N. Shemyakin, A. V. Berdyugin, N.S. Bashtovoy, G.V. Fedotovich, Alexey Kharlamov, A.A. Grebenuk, V.Sh. Banzarov, A. A. Botov, D.P. Kovrizhin, A.V. Vasiljev, P.A. Lukin, L.A. Korneev, Y. Usov, V.E. Shebalin, A.I. Vorobiov, V.G. Golubev, and V. L. Ivanov
Subjects: Physics, Annihilation, 010308 nuclear & particles physics, Electron–positron annihilation, QC1-999, Hadron, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, 010306 general physics, Collider, VEPP-2000
Abstract: We present current status of the SND and CMD-3 experiments at the VEPP-2000 e+e− collider and recent result of data analysis on the processes $e^+e^-\rightarrow\pi^+\pi^-,n\overline n,\pi^+\pi^-\eta,\pi^+\pi^-\pi^0\eta,K_SK_L\pi^0$, etc.
Published: 2019

31. CMD-3 Overview

Author: N.M. Ryskulov, Alexey Talyshev, P.A. Lukin, P. Yu. Shatunov, A.E. Bondar, E.A. Kozyrev, V. S. Banzarov, A.A. Grebenuk, P. Krokovny, A. N. Kirpotin, S.E. Gayazov, D.N. Shemyakin, A.A. Ruban, Ilya Zemlyansky, G.V. Fedotovich, A.E. Kuzmenko, E. P. Solodov, A.S. Kuzmin, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, D.N. Grigoriev, A.N. Kozyrev, A.A. Korobov, A.N. Amirkhanov, I.B. Logashenko, S.S. Gribanov, A.L. Erofeev, V.M. Aulchenko, A.S. Popov, D.A. Epifanov, G.P. Razuvaev, D. B. Shwartz, A.L. Sibidanov, A.V. Bragin, Vassili Kazanin, B.A. Shwartz, Yu.V. Yudin, Alexey Anisenkov, A.E. Ryzhenenkov, K.Yu. Mikhailov, Yu.N. Pestov, Fedor Ignatov, N.S. Bashtovoy, S.I. Eidelman, A. V. Otboev, S.V. Karpov, Yu. M. Shatunov, V.S. Okhapkin, A. I. Senchenko, Ivan Koop, R.R. Akhmetshin, L.B. Epshteyn, and D.E. Berkaev
Subjects: Physics, Range (particle radiation), Muon, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, QC1-999, Detector, Hadron, 01 natural sciences, law.invention, Calorimeter, Nuclear physics, Upgrade, law, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, 010306 general physics, Collider, Nuclear Experiment, Energy (signal processing)
Abstract: The CMD-3 detector is installed at the VEPP-2000 e+e− collider at BINP (Novosibirsk, Russia). It is a general-purpose detector, equipped with a tracking system, two crystal (CSI and BGO) calorimeters, liquid Xe calorimeter, TOF and muon systems. The main goal of experiments at CMD-3 is a study of exclusive modes of e+e−→ hadrons at energies $ \sqrt s \le $ GeV. In particular, these results provide an important input for calculation of the hadronic contribution to the muon anomalous magnetic moment. The first round of data taking was performed in 2011–2013, when about 60 1/pb were taken in the center-of-mass (c.m.) energy range from 0.32 to 2.0 GeV. Here we present a survey of results of data analysis. Between 2013 and 2016 the collider and the detector were upgraded. The data taking resumed by the end of 2016. In the first run after the upgrade about 50 1/pb were collected at the energy range between 1.28 and 2.007 GeV. We discuss the upgrade and the first preliminary results from the new data.
Published: 2019

32. The NNbar and multihadron production at the threshold at VEPP2000

Author: A.S. Popov, A. V. Semenov, K.Yu. Mikhailov, E. P. Solodov, A.A. Korobov, Vassili Kazanin, D.E. Berkaev, Yu. M. Shatunov, P. Krokovny, I.B. Logashenko, V.S. Okhapkin, N.M. Ryskulov, S.V. Karpov, N.S. Bashtovoy, A.S. Kuzmin, S.S. Gribanov, Alexey Talyshev, A.N. Amirkhanov, A.L. Erofeev, E.A. Kozyrev, Yu.V. Yudin, B.A. Shwartz, F.V. Ignatov, L.B. Epshteyn, P.A. Lukin, A.E. Ryzhenenkov, R.R. Akhmetshin, Yu. A. Rogovsky, D.A. Epifanov, Ilya Zemlyansky, G.P. Razuvaev, A.A. Grebenuk, Yu.N. Pestov, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, A.V. Bragin, D. B. Shwartz, A.L. Sibidanov, V.M. Aulchenko, A.N. Kozyrev, A. N. Kirpotin, D.N. Shemyakin, D.N. Grigoriev, Alexey Anisenkov, P. Yu. Shatunov, S.I. Eidelman, A.E. Bondar, G.V. Fedotovich, I. A. Koop, V.M. Titov, V.Sh. Banzarov, S.E. Gayazov, A.A. Ruban, and A.E. Kuzmenko
Subjects: Physics, Resonance amplitude, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, QC1-999, Hadron, Atomic physics
Abstract: A study of hadron production at the nucleon-antinucleon threshold has been performed with the CMD-3 detector at the VEPP-2000 e+e− collider. A very fast rise with an about 1 MeV width has been observed in the e+e−→ pp̅ cross section. A sharp drop in the e+ e−→ 3(π+π−) cross section has been con?rmed and found to have a width of less than 2 MeV, in agreement with the observed fast rise of the e+e−→ pp̅ cross section. For the ?rst time a similar sharp drop is demonstrated in the e+e−→ K+ K−π+π− cross section. The behavior of the e+e−→ 3(π+ π−), K+ K−π+π− cross sections cannot be explained by an interference of any resonance amplitude with continuum, therefore this phenomenon cannot be due to a narrow near-threshold resonance. No such structure has been observed in the e+e−→ 2(π+π−) cross section.
Published: 2019

33. Study of the process e+e−→ K+K−π0 in the center-of-mass energy range 1.2–2 GeV with the CMD-3 detector

Author: A. V. Semenov, P.A. Lukin, F.V. Ignatov, E.A. Perevedentsev, N.S. Bashtovoy, L.B. Epshteyn, S.S. Gribanov, D.A. Epifanov, V.Sh. Banzarov, A.L. Erofeev, G.P. Razuvaev, S.E. Gayazov, A.A. Ruban, G.V. Fedotovich, S.V. Karpov, Yu.N. Pestov, A.E. Kuzmenko, B.A. Shwartz, Yu.V. Yudin, A.S. Kuzmin, A.E. Ryzhenenkov, R.R. Akhmetshin, Alexey Talyshev, A.S. Popov, N.M. Ryskulov, V.M. Titov, E.A. Kozyrev, I.B. Logashenko, D.E. Berkaev, K.Yu. Mikhailov, A. P. Lysenko, P. Krokovny, I. A. Koop, A.A. Grebenuk, Yu. M. Shatunov, V.S. Okhapkin, A.S. Kasaev, E. P. Solodov, A.A. Korobov, A.N. Amirkhanov, A.V. Bragin, A. I. Senchenko, Vassili Kazanin, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, D.N. Shemyakin, V.M. Aulchenko, A.N. Kozyrev, Alexey Anisenkov, D. B. Shwartz, A.L. Sibidanov, A.E. Bondar, D.N. Grigoriev, S.I. Eidelman, and A. V. Otboev
Subjects: Physics, Nuclear physics, Range (particle radiation), law, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Electron–positron annihilation, QC1-999, Detector, Center of mass, Collider, Energy (signal processing), law.invention
Abstract: The process e+ e−→ K+ K−π0 has been studied in the center-of-mass energy range from 1.2 to 2 GeV using a 80.6 pb−1 data sample collected with the CMD-3 detector at the electron-positron collider VEPP-2000. Preliminary results of the cross-section measurement are presented.
Published: 2019

34. Study of the reactions e+e−→π+π−π0π0π0 and π+π−π0π0η at center-of-mass energies from threshold to 4.35 GeV using initial-state radiation

Author: J. P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, D. N. Brown, Yu. G. Kolomensky, M. Fritsch, H. Koch, T. Schroeder, R. Cheaib, C. Hearty, T. S. Mattison, J. A. McKenna, R. Y. So, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B. Golubev, E. A. Kozyrev, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, K. Yu. Todyshev, A. J. Lankford, B. Dey, J. W. Gary, O. Long, A. M. Eisner, W. S. Lockman, W. Panduro Vazquez, D. S. Chao, C. H. Cheng, B. Echenard, K. T. Flood, D. G. Hitlin, J. Kim, Y. Li, D. X. Lin, S. Middleton, T. S. Miyashita, P. Ongmongkolkul, J. Oyang, F. C. Porter, M. Röhrken, Z. Huard, B. T. Meadows, B. G. Pushpawela, M. D. Sokoloff, L. Sun, J. G. Smith, S. R. Wagner, D. Bernard, M. Verderi, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, V. Santoro, A. Calcaterra, R. de Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I. M. Peruzzi, M. Piccolo, M. Rotondo, A. Zallo, S. Passaggio, C. Patrignani, B. J. Shuve, H. M. Lacker, B. Bhuyan, U. Mallik, C. Chen, J. Cochran, S. Prell, A. V. Gritsan, N. Arnaud, M. Davier, F. Le Diberder, A. M. Lutz, G. Wormser, D. J. Lange, D. M. Wright, J. P. Coleman, E. Gabathuler, D. E. Hutchcroft, D. J. Payne, C. Touramanis, A. J. Bevan, F. Di Lodovico, R. Sacco, G. Cowan, Sw. Banerjee, C. L. Davis, A. G. Denig, W. Gradl, K. Griessinger, A. Hafner, K. R. Schubert, R. J. Barlow, G. D. Lafferty, R. Cenci, A. Jawahery, D. A. Roberts, R. Cowan, S. H. Robertson, R. M. Seddon, N. Neri, F. Palombo, L. Cremaldi, R. Godang, D. J. Summers, P. Taras, G. De Nardo, C. Sciacca, G. Raven, C. P. Jessop, J. M. LoSecco, K. Honscheid, R. Kass, A. Gaz, M. Margoni, M. Posocco, G. Simi, F. Simonetto, R. Stroili, S. Akar, E. Ben-Haim, M. Bomben, G. R. Bonneaud, G. Calderini, J. Chauveau, G. Marchiori, J. Ocariz, M. Biasini, E. Manoni, A. Rossi, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, M. Chrzaszcz, F. Forti, M. A. Giorgi, A. Lusiani, B. Oberhof, E. Paoloni, M. Rama, G. Rizzo, J. J. Walsh, L. Zani, A. J. S. Smith, F. Anulli, R. Faccini, F. Ferrarotto, F. Ferroni, A. Pilloni, G. Piredda, C. Bünger, S. Dittrich, O. Grünberg, M. Heß, T. Leddig, C. Voß, R. Waldi, T. Adye, F. F. Wilson, S. Emery, G. Vasseur, D. Aston, C. Cartaro, M. R. Convery, J. Dorfan, W. Dunwoodie, M. Ebert, R. C. Field, B. G. Fulsom, M. T. Graham, C. Hast, W. R. Innes, P. Kim, D. W. G. S. Leith, S. Luitz, D. B. MacFarlane, D. R. Muller, H. Neal, B. N. Ratcliff, A. Roodman, M. K. Sullivan, J. Va’vra, W. J. Wisniewski, M. V. Purohit, J. R. Wilson, A. Randle-Conde, S. J. Sekula, H. Ahmed, N. Tasneem, M. Bellis, P. R. Burchat, E. M. T. Puccio, M. S. Alam, J. A. Ernst, R. Gorodeisky, N. Guttman, D. R. Peimer, A. Soffer, S. M. Spanier, J. L. Ritchie, R. F. Schwitters, J. M. Izen, X. C. Lou, F. Bianchi, F. De Mori, A. Filippi, D. Gamba, L. Lanceri, L. Vitale, F. Martinez-Vidal, A. Oyanguren, J. Albert, A. Beaulieu, F. U. Bernlochner, G. J. King, R. Kowalewski, T. Lueck, C. Miller, I. M. Nugent, J. M. Roney, R. J. Sobie, T. J. Gershon, P. F. Harrison, T. E. Latham, R. Prepost, and S. L. Wu
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Hadron, 7. Clean energy, 01 natural sciences, Omega, 0103 physical sciences, Mass spectrum, Pi, Intermediate state, Invariant mass, 010306 general physics
Abstract: We study the processes $e^+e^-\to 2(\pi^+\pi^-)\pi^0\pi^0\pi^0\gamma$ and $2(\pi^+\pi^-)\pi^0\pi^0\eta\gamma$ in which an energetic photon is radiated from the initial state. The data were collected with the \babar~ detector at SLAC. About 14\,000 and 4700 events, respectively, are selected from a data sample corresponding to an integrated luminosity of 469 fb^{-1}. The invariant mass of the hadronic final state defines the effective \epem center-of-mass energy. The center-of-mass energies range from threshold to 4.5 GeV. From the mass spectra, the first ever measurements of the $e^+e^-\to 2(\pi^+\pi^-)\pi^0\pi^0\pi^0$ and the $e^+e^-\to2(\pi^+\pi^-)\pi^0\pi^0\eta$ cross sections are performed. The contributions from $\omega\pi^+\pi^-\pi^0\pi^0$, $\eta2(\pi^+\pi^-)$, and other intermediate states are presented. We observe the $J/\psi$ and $\psi(2S)$ in most of these final states and measure the corresponding branching fractions, many of them for the first time.
Published: 2018

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

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

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

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

37. Measurement of the γγ→η′ transition form factor

Author: A. J S Smith, A. Randle-Conde, R. F. Schwitters, R. Cenci, R. de Sangro, M. K. Sullivan, Z. C. Huard, Gabriele Simi, J. R. Wilson, T. S. Miyashita, F. Le Diberder, C. H. Cheng, K. Yu Todyshev, V. E. Blinov, Marcin Chrzaszcz, M. Verderi, Eleonora Luppi, Yu. I. Skovpen, G. J. King, M. A. Giorgi, S. Passaggio, R. Faccini, J. M. Izen, Simon Akar, M. Bellis, T. Leddig, K. Honscheid, F. Forti, A. R. Buzykaev, C. Cartaro, D. J. Summers, A. M. Lutz, M. V. Purohit, F. Bianchi, J. W. Gary, P. Taras, A. Calcaterra, I. M. Nugent, R. Kowalewski, J. Dorfan, D. Gamba, D. J. Payne, X. C. Lou, N. Arnaud, J. P. Coleman, G. Eigen, M. Margoni, A. Soffer, R. Godang, E. Paoloni, M. Heß, D. S. Chao, G. Wormser, G. Batignani, M. R. Convery, D. B. Macfarlane, L. Lanceri, R. J. Sobie, A. Roodman, D. J. Lange, Alessandro Pilloni, D. R. Peimer, T. Schroeder, A. J. Lankford, D. Aston, W. Panduro Vazquez, Wu S. L., R. M. Seddon, E. P. Solodov, J. Chauveau, M. Posocco, S. Bettarini, R. Prepost, Y. B. Li, G. Piredda, F. Anulli, U. Mallik, M. Carpinelli, J. Va'Vra, E. Fioravanti, W. S. Lockman, Roland Waldi, So R. Y., L. Vitale, K. T. Flood, Ray Franklin Cowan, C. Chen, G. Raven, L. Zani, G. Vasseur, M. Piccolo, P. C. Kim, F. U. Bernlochner, T. Adye, J. M. Roney, S. M. Spanier, C. L. Davis, B. Echenard, M. Fritsch, K. Griessinger, G. Calderini, Alberto Lusiani, J. Ocariz, G. Casarosa, C. Hearty, Marcello Rotondo, S. Emery, M. T. Graham, B. Bhuyan, F. Simonetto, Timothy Gershon, R. Cheaib, Ju-Young Kim, M. Davier, A. Oyanguren, M. Bomben, Dominik Müller, F. Ferroni, Biplab Dey, W. J. Wisniewski, D. A. Roberts, F. Di Lodovico, Brian Meadows, E. Grauges, F. Martinez-Vidal, J. J. Walsh, Matteo Rama, A. V. Gritsan, D. Bernard, Fergus Wilson, A. G. Denig, B. N. Ratcliff, I. Garzia, James G. Smith, C. Sciacca, R. C. Field, H. Ahmed, C. Touramanis, D. N. Brown, S. Luitz, K. R. Schubert, S. I. Serednyakov, F. Palombo, V. Poireau, Thomas Latham, C. Patrignani, V. Tisserand, J. L. Ritchie, R. Calabrese, Nicola Neri, M. Biasini, T. Lueck, F. De Mori, J. M. Losecco, G. Marchiori, D. G. Hitlin, Elisa Manoni, F. C. Porter, Michael Sokoloff, J. Cochran, C. Bozzi, R. Gorodeisky, C. Hast, P. R. Burchat, G. A. Cowan, A. P. Onuchin, L. Sun, Sw. Banerjee, Yu. G. Kolomensky, P. Ongmongkolkul, E. Ben-Haim, J. A. Ernst, N. Tasneem, J. Albert, T. S. Mattison, N. Guttman, B. G. Fulsom, W. Gradl, Adrian John Bevan, F. Ferrarotto, E. M. T. Puccio, S. Dittrich, I. M. Peruzzi, M. Ebert, R. Stroili, A. Rossi, O. Long, C. Bünger, S. Martellotti, V. P. Druzhinin, D. M. Wright, G. De Nardo, H. M. Lacker, A. Jawahery, S. J. Sekula, G. Cibinetto, P. Patteri, W. Dunwoodie, M. S. Alam, H. Koch, E. A. Kozyrev, G. Finocchiaro, H. Neal, R. Kass, D. W G S Leith, A. Beaulieu, D. Bettoni, S. Prell, V. B. Golubev, B. G. Pushpawela, M. Röhrken, A. Gaz, R. Sacco, B. Oberhof, S. H. Robertson, A. Palano, E. A. Kravchenko, George Lafferty, C. P. Jessop, A. Filippi, G. Rizzo, A. Hafner, W. R. Innes, David Hutchcroft, Oliver Grünberg, G. R. Bonneaud, A. Zallo, C. Voß, J. A. McKenna, S. R. Wagner, E. Gabathuler, P. F. Harrison, A. M. Eisner, Roger Barlow, J. P. Lees, V. Santoro, and L. Cremaldi
Subjects: Physics, Range (particle radiation), 010308 nuclear & particles physics, Electron–positron annihilation, Form factor (quantum field theory), 01 natural sciences, 7. Clean energy, Measure (mathematics), law.invention, Luminosity, Nuclear physics, law, 0103 physical sciences, 010306 general physics, Collider
Abstract: We study the process e^+e^− → e^+e^−η′ in the double-tag mode and measure for the first time the γ⋆γ⋆ → η′ transition form factor F_η′(Q^2_1,Q^2_2) in the momentum-transfer range 2 < Q^2_1, Q^2_2 < 60 GeV^2. The analysis is based on a data sample corresponding to an integrated luminosity of around 469 fb^(-1) collected at the PEP-II e^+e^− collider with the BABAR detector at center-of-mass energies near 10.6 GeV.
Published: 2018

38. Search for the decay mode B0→ppp¯p¯

Author: C. Hearty, M. Rotondo, A. J. Bevan, E. Gabathuler, F. C. Porter, Tisserand, J. G. Smith, V. B. Golubev, F. Di Lodovico, Cheng Chen, B. G. Pushpawela, D. J. Payne, A. V. Gritsan, A. M. Lutz, W. S. Lockman, S. Prell, I. Garzia, E. Luppi, D. Bettoni, Sokoloff, M. Piccolo, T. S. Mattison, D. N. Brown, Wagner, C. H. Cheng, R. Calabrese, W. Gradl, M. Röhrken, Z. C. Huard, E. Grauges, U. Mallik, G. Eigen, E. Fioravanti, T. S. Miyashita, J. A. McKenna, C. Touramanis, A. Palano, K. Y. Todyshev, B. Echenard, C. Patrignani, A. Calcaterra, Tamara Vazquez Schroeder, K. T. Flood, Owen Rosser Long, R. Y. So, V. E. Blinov, A. G. Denig, J. P. Lees, R. Sacco, R. de Sangro, H. M. Lacker, D. G. Hitlin, L. Sun, J. P. Coleman, J. Cochran, Douglas Wright, D. J. Lange, David Hutchcroft, W. Panduro Vazquez, Ju-Young Kim, G. Finocchiaro, Y. I. Skovpen, P. Patteri, G. Wormser, E. P. Solodov, E. A. Kravchenko, A. R. Buzykaev, A. J. Lankford, B. T. Meadows, S. Martellotti, F. Le Diberder, A. M. Eisner, Y. B. Li, C. L. Davis, E. A. Kozyrev, Santoro, A. Zallo, Herbert Koch, A. P. Onuchin, G. Cibinetto, M. Fritsch, D. S. Chao, V. P. Druzhinin, C. Bozzi, G. Cowan, P. Ongmongkolkul, M. Davier, K. Griessinger, S. Banerjee, Poireau, S. Passaggio, Denis Bernard, B. Bhuyan, J. W. Gary, M. Verderi, N. Arnaud, I. M. Peruzzi, S. I. Serednyakov, and Y. G. Kolomensky
Subjects: Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Detector, 01 natural sciences, Standard deviation, law.invention, Distribution (mathematics), law, 0103 physical sciences, 010306 general physics, Collider, Energy (signal processing), Bar (unit)
Abstract: A search is presented for the four-body decay B0→ppp¯p¯ in a sample of 471 million BB¯ pairs collected with the BABAR detector, operated at the SLAC PEP-II asymmetric-energy e+e- collider. The center-of-mass energy is 10.58 GeV. From a fit to the distribution of the energy-substituted mass mES, the branching fraction B(B0→ppp¯p¯)=(1.1±0.5±0.2)×10-7 is extracted, where the first uncertainty is statistical and the second is systematic. The significance of the signal, including the systematic uncertainty, is 2.9 standard deviations. The upper limit on the branching fraction is determined to be 2.0×10-7 at 90% confidence level.
Published: 2018

39. Study of the processe+e−→KS0KL0in the center-of-mass energy range 1004–1060 MeV with the CMD-3 detector at the VEPP-2000 e + e − collider

Author: Yu. M. Shatunov, Alexey Anisenkov, N.M. Ryskulov, E. P. Solodov, A.V. Bragin, A.A. Korobov, Yu.N. Pestov, P.A. Lukin, Fedor Ignatov, N.S. Bashtovoy, Vassili Kazanin, A.L. Erofeev, V.M. Titov, A.S. Kasaev, A.N. Kozyrev, A.S. Popov, D.E. Berkaev, S.S. Gribanov, A.N. Amirkhanov, V.M. Aulchenko, B.A. Shwartz, K.Yu. Mikhailov, A.E. Bondar, V.S. Okhapkin, A.E. Ryzhenenkov, S.V. Karpov, A. N. Kirpotin, L.B. Epshteyn, D. Epifanov, Yu.V. Yudin, A. I. Senchenko, I. A. Koop, A.A. Grebenuk, D.N. Shemyakin, I.B. Logashenko, P. Yu. Shatunov, S.I. Eidelman, A. V. Otboev, D.N. Grigoriev, G.V. Fedotovich, V. S. Banzarov, A.L. Sibidanov, G.P. Razuvaev, S.E. Gayazov, Alexey Talyshev, A.A. Ruban, A.S. Kuzmin, A.E. Kuzmenko, E.A. Kozyrev, P. Krokovny, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, D.B. Shwartz, and O.A. Kovalenko
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, 010308 nuclear & particles physics, Detector, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, Center of mass, 010306 general physics, Collider, VEPP-2000, Energy (signal processing)
Abstract: This work is supported in part by the Russian Education and by the Russian Foundation for Basic RFBR 14-02-00580-a, RFBR 14-02-91332, RFBR 15-02-05674-a and RFBR 16-02-00160-a.
Published: 2016

40. Study of the process e+e−→pp¯ in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector

Author: Fedor Ignatov, A.V. Bragin, D. Epifanov, Yu.V. Yudin, G.P. Razuvaev, A.L. Sibidanov, S.G. Pivovarov, B.I. Khazin, S.I. Eidelman, A. V. Otboev, N.M. Ryskulov, B.A. Shwartz, A.E. Ryzhenenkov, R.R. Akhmetshin, S.S. Gribanov, D.E. Berkaev, A.L. Erofeev, I.B. Logashenko, S.E. Gayazov, P. Krokovny, A.E. Bondar, A.A. Grebenuk, Yu.N. Pestov, A.E. Kuzmenko, O.A. Kovalenko, S.V. Karpov, I. A. Koop, Alexey Talyshev, D. B. Shwartz, E.A. Kozyrev, Yu. M. Shatunov, Alexey Anisenkov, V.S. Okhapkin, V.M. Aulchenko, A.S. Kasaev, A.N. Kozyrev, A.L. Romanov, L.B. Epshteyn, D.N. Grigoriev, A.N. Amirkhanov, A. N. Kirpotin, D.N. Shemyakin, A.A. Ruban, V.Sh. Banzarov, A.S. Popov, K.Yu. Mikhailov, V.M. Titov, Yu. M. Zharinov, P. Yu. Shatunov, G.V. Fedotovich, E.M. Gromov, E. P. Solodov, Vassili Kazanin, A.S. Kuzmin, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, P.A. Lukin, and N.S. Bashtovoy
Subjects: Physics, Systematic error, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, Electron–positron annihilation, Detector, 01 natural sciences, law.invention, Nuclear physics, Angular distribution, law, 0103 physical sciences, 010306 general physics, Nucleon, Collider, Energy (signal processing)
Abstract: Using a data sample of 7.7 pb − 1 collected with the CMD-3 detector at the VEPP-2000 e + e − collider we select about 2900 events of the process e + e − → p p ¯ and measure its cross section at 12 energy points with about 6% systematic uncertainty. From the angular distribution of produced nucleons we obtain the ratio G E / G M .
Published: 2016

41. Overview of the CMD-3 recent results

Author: D.A. Epifanov, D. E. Berkaev, A.A. Korobov, M.V. Timoshenko, Sergei V. Karpov, I.B. Logashenko, P.A. Lukin, E.A. Kozyrev, Vassili Kazanin, S. Eidelman, D.N. Shemyakin, D. B. Shwartz, G.P. Razuvaev, A.N. Kozyrev, A.S. Kasaev, Yu. M. Shatunov, A.A. Ruban, V.Sh. Banzarov, N.S. Bashtovoy, A.E. Bondar, A.N. Amirkhanov, A.L. Sibidanov, V. L. Ivanov, E. P. Solodov, S.E. Gayazov, V.S. Okhapkin, Ivan Koop, A. A. Grebenuk, S.S. Gribanov, A.E. Ryzhenenkov, A.L. Erofeev, A.S. Kuzmin, D.N. Grigoriev, A.S. Popov, A. V. Semenov, Alexei Talyshev, L.B. Epshteyn, A. I. Vorobiov, K.Yu. Mikhailov, R.R. Akhmetshin, Yu.V. Yudin, V. M. Aulchenko, Yu.N. Pestov, B. Shwartz, F.V. Ignatov, Evgeny Perevedentsev, A.E. Kuzmenko, G.V. Fedotovich, A.V. Bragin, S. S. Tolmachev, Alexey Anisenkov, N.M. Ryskulov, F. Grancagnolo, V.E. Shebalin, A. P. Lysenko, and P. Krokovny
Subjects: Physics, History, Computer Science Applications, Education
Abstract: The CMD-3 detector started data taking at the electron-positron collider VEPP-2000 in December 2010 with a goal to collect about 1 fb−1. The collected data sample corresponds to an integrated luminosity of 200 pb−1 in the center-of-mass energy range from 0.32 up to 2 GeV. This paper reports recent results on the hadronic cross sections measurements with the CMD-3 detector.
Published: 2020

42. Measurement of the spectral function for the τ−→K−KSντ decay

Author: G. J. King, D. B. Macfarlane, B. Bhuyan, J. Dorfan, Z. C. Huard, J. M. Izen, E. Grauges, M. Bellis, F. Martinez-Vidal, J. J. Walsh, V. B. Golubev, M. Röhrken, George Lafferty, C. P. Jessop, V. E. Blinov, Matteo Rama, A. V. Gritsan, A. Palano, James G. Smith, H. Neal, R. Kass, P. Ongmongkolkul, A. Hafner, W. R. Innes, David Hutchcroft, D. W G S Leith, D. Gamba, A. Beaulieu, J. Va'Vra, Oliver Grünberg, G. R. Bonneaud, W. S. Lockman, L. Lanceri, J. A. McKenna, S. R. Wagner, A. Calcaterra, B. Echenard, C. H. Cheng, R. M. Seddon, E. Fioravanti, A. G. Denig, B. N. Ratcliff, C. Bünger, M. Davier, V. P. Druzhinin, Ray Franklin Cowan, S. M. Spanier, A. Oyanguren, K. Griessinger, C. L. Davis, R. F. Schwitters, A. J S Smith, P. C. Kim, M. Posocco, K. T. Flood, R. Cheaib, A. Jawahery, N. Guttman, R. Stroili, M. Fritsch, F. U. Bernlochner, G. Cibinetto, J. Ocariz, M. T. Graham, D. M. Wright, M. S. Alam, Brian Meadows, Roland Waldi, So R. Y., F. De Mori, J. P. Lees, E. A. Kozyrev, W. J. Wisniewski, F. Ferroni, R. Gorodeisky, G. Vasseur, G. Wormser, F. Le Diberder, K. Yu Todyshev, B. G. Fulsom, C. Bozzi, Gabriele Simi, J. P. Coleman, R. Cenci, Ju-Young Kim, M. Bomben, F. Forti, R. Sacco, M. Margoni, C. Voß, Marcin Chrzaszcz, B. Oberhof, J. Cochran, A. M. Lutz, A. Zallo, Dominik Müller, T. Schroeder, A. J. Lankford, Yu. G. Kolomensky, G. Piredda, V. Santoro, U. Mallik, G. Batignani, M. Biasini, D. N. Brown, Y. B. Li, Michael Sokoloff, F. Ferrarotto, E. M. T. Puccio, M. Carpinelli, R. Godang, C. Sciacca, R. C. Field, H. Ahmed, T. Leddig, E. A. Kravchenko, D. J. Lange, R. Prepost, G. Casarosa, M. Ebert, P. R. Burchat, J. A. Ernst, L. Zani, A. Rossi, G. A. Cowan, S. Emery, Eleonora Luppi, C. Hearty, Marcello Rotondo, T. Adye, L. Vitale, X. C. Lou, S. Dittrich, J. L. Ritchie, O. Long, Wu S. L., D. Bernard, G. Eigen, A. Filippi, D. J. Summers, G. Rizzo, S. I. Serednyakov, F. Palombo, G. Calderini, A. Soffer, D. S. Chao, S. Martellotti, G. De Nardo, Alberto Lusiani, Nicola Neri, H. M. Lacker, C. Chen, Biplab Dey, N. Tasneem, J. Albert, Fergus Wilson, S. J. Sekula, C. Cartaro, I. M. Peruzzi, D. J. Payne, E. Ben-Haim, E. Paoloni, R. de Sangro, P. Patteri, Yu. I. Skovpen, K. Honscheid, J. W. Gary, P. Taras, M. Heß, R. Kowalewski, M. R. Convery, N. Arnaud, T. Lueck, D. G. Hitlin, J. Chauveau, C. Hast, Simon Akar, A. R. Buzykaev, H. Koch, S. Bettarini, G. Raven, G. Finocchiaro, M. Piccolo, F. Simonetto, C. Touramanis, S. Luitz, K. R. Schubert, R. J. Sobie, A. Roodman, W. Dunwoodie, T. S. Mattison, A. Randle-Conde, W. Gradl, M. K. Sullivan, M. Verderi, R. Faccini, V. Poireau, M. A. Giorgi, J. M. Losecco, G. Marchiori, F. C. Porter, F. Bianchi, I. M. Nugent, R. Calabrese, F. Di Lodovico, E. P. Solodov, Elisa Manoni, Sw. Banerjee, A. P. Onuchin, L. Sun, Adrian John Bevan, Alessandro Pilloni, I. Garzia, S. Passaggio, D. R. Peimer, Thomas Latham, C. Patrignani, V. Tisserand, D. Aston, F. Anulli, D. Bettoni, J. M. Roney, S. Prell, W. Panduro Vazquez, B. G. Pushpawela, A. Gaz, S. H. Robertson, M. V. Purohit, Timothy Gershon, D. A. Roberts, E. Gabathuler, P. F. Harrison, A. M. Eisner, L. Cremaldi, Roger Barlow, J. R. Wilson, and T. S. Miyashita
Subjects: S system, Physics, 010308 nuclear & particles physics, Branching fraction, Detector, 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, Mass spectrum, Spectral function, 010306 general physics, Collider, Energy (signal processing)
Abstract: The decay τ^− → K^−K_Sν_τ has been studied using 430×10^6 e^+e^− → τ^+τ^− events produced at a center-of-mass energy around 10.6 GeV at the PEP-II collider and studied with the BABAR detector. The mass spectrum of the K^−K_S system has been measured and the spectral function has been obtained. The measured branching fraction B(τ^− → K^−K_Sν_τ) = (0.739 ± 0.011(stat) ± 0.020(syst)) × 10^(-3) is found to be in agreement with earlier measurements.
Published: 2018

43. Combination of KLOE σ (e+e− → π+π−γ(γ)) measurements and determination of $$ {a}_{\mu}^{\pi^{+}{\pi}^{-}} $$ in the energy range 0.10 < s < 0.95 GeV2

Author: Paolo Santangelo, G. Venanzoni, P. Fermani, A. Passeri, Antonio Budano, N. Raha, E. P. Solodov, V. De Leo, P. A. Lukin, L. Tortora, Magnus Wolke, Stefan E. Müller, Michał Silarski, E. A. Kozyrev, Florin Sirghi, Wojciech Krzemien, D. Moricciani, S. Loffredo, P. Branchini, Aleksander Gajos, A. De Santis, Paweł Moskal, Gianfranco Morello, Filippo Ceradini, W. Wislicki, A. Selce, A. Keshavarzi, G. D'Agostini, E. Dané, M. Berlowski, S. Miscetti, A. Di Domenico, V. L. Ivanov, Vincenzo Patera, Andrzej Kupsc, Thomas Teubner, R. Messi, T. Johansson, B. Cao, Paolo Ciambrone, Marco Schioppa, D. Kisielewska-Kamińska, F. Bossi, G. Fantini, S. Giovannella, D. Domenici, P. De Simone, C. Bloise, Giuseppe Mandaglio, M. Martini, E. De Lucia, X. Kang, A. Fantini, D. Babusci, P. Gauzzi, A. Anastasi, A. D'Uffizi, E. Perez del Rio, Eryk Czerwiński, L. Caldeira Balkeståhl, Francesca Curciarello, S. Fiore, E. Graziani, A. Di Cicco, and Fiore, S.
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, e+-e- Experiments, Muon, Anomalous magnetic dipole moment, 010308 nuclear & particles physics, Hadron, State (functional analysis), Covariance, 01 natural sciences, 0103 physical sciences, Anomaly (physics), 010306 general physics, Energy (signal processing)
Abstract: The three precision measurements of the cross section σ(e + e − → π + π −γ(γ)) using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of these measurements requires covariance matrices that fully describe the correlations. We present the construction of these covariance matrices and use them to determine a combined KLOE measurement for σ(e + e − → π + π −γ(γ)). We find, from this combination, a two-pion contribution to the muon magnetic anomaly in the energy range 0.10 < s < 0.95 GeV2 of $$ {a}_{\mu}^{\pi^{+}{\pi}^{-}}=\left(489.8\pm {1.7}_{\mathrm{stat}}\pm {4.8}_{\mathrm{sys}}\right)\times {10}^{-10} $$ a μ π + π − = 489.8 ± 1.7 stat ± 4.8 s y s × 10 − 10 . Data vectors and covariance matrices are available at http://www.lnf.infn.it/kloe/ppg/ ppg_2017/ppg_2017.html.
Published: 2018

44. Study of the process e + e − → K + K − in the center-of-mass energy range 1010–1060 MeV with the CMD-3 detector

Author: I.B. Logashenko, Yu. A. Rogovsky, Yu. M. Shatunov, E.A. Perevedentsev, S.S. Gribanov, A.L. Erofeev, B.A. Shwartz, R.R. Akhmetshin, A.E. Ryzhenenkov, G.P. Razuvaev, A.L. Sibidanov, Yu.V. Yudin, Fedor Ignatov, N.M. Ryskulov, D.B. Shwartz, N.S. Bashtovoy, A.A. Grebenuk, A.S. Popov, P.A. Lukin, A.V. Bragin, Alexey Talyshev, A.S. Kuzmin, E.A. Kozyrev, A.S. Kasaev, P. Krokovny, K.Yu. Mikhailov, L.B. Epshteyn, V. S. Banzarov, A.N. Amirkhanov, V.M. Aulchenko, D. Epifanov, A.E. Bondar, A. P. Lysenko, S.V. Karpov, G.V. Fedotovich, D.N. Grigoriev, Yu.N. Pestov, D.E. Berkaev, Alexey Anisenkov, I. A. Koop, A.N. Kozyrev, D.N. Shemyakin, S.E. Gayazov, A.A. Ruban, A.E. Kuzmenko, S.I. Eidelman, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, V.S. Okhapkin, E. P. Solodov, A.A. Korobov, and Vassili Kazanin
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Muon, Anomalous magnetic dipole moment, Meson, 010308 nuclear & particles physics, Detector, Analytical chemistry, FOS: Physical sciences, 01 natural sciences, lcsh:QC1-999, Luminosity, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Center of mass, 010306 general physics, Energy (signal processing), lcsh:Physics
Abstract: The process e + e − → K + K − has been studied using 1.7 × 10 6 events from a data sample corresponding to an integrated luminosity of 5.7 pb −1 collected with the CMD-3 detector in the center-of-mass energy range 1010–1060 MeV. The cross section is measured with about 2% systematic uncertainty and is used to calculate the contribution to the anomalous magnetic moment of the muon a μ K + K − = ( 19.33 ± 0.40 ) × 10 − 10 , and to obtain the ϕ ( 1020 ) meson parameters. We consider the relationship between the e + e − → K + K − and e + e − → K S 0 K L 0 cross sections and compare it to the theoretical prediction.
Published: 2018

45. Combined limit on the production of a light gauge boson decaying into mu(+) mu(-) and pi(+) pi(-)

Author: P.A. Lukin, E. P. Solodov, E. Perez del Rio, A. D'Uffizi, D. Kisielewska-Kamińska, Michał Silarski, Filippo Ceradini, Paolo Ciambrone, G. Venanzoni, P. Fermani, V. L. Ivanov, P. De Simone, Paweł Moskal, A. De Santis, R. Messi, T. Johansson, G. Fantini, Eryk Czerwiński, E. Dané, Francesca Curciarello, D. Domenici, S. Giovannella, F. Bossi, Antonio Budano, C. Bloise, A. Anastasi, L. Tortora, A. Selce, Marco Schioppa, A. Di Domenico, Giuseppe Mandaglio, Magnus Wolke, P. Gauzzi, S. Miscetti, X. Kang, D. Babusci, N. Raha, A. Fantini, V. De Leo, Florin Sirghi, Vincenzo Patera, Andrzej Kupsc, Wojciech Krzemien, P. Branchini, E. De Lucia, M. Martini, Paolo Santangelo, D. Moricciani, G. D'Agostini, E.A. Kozyrev, A. Di Cicco, A. Passeri, S. Fiore, E. Graziani, Wojciech Wiślicki, M. Berlowski, B. Cao, Aleksander Gajos, Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., D'Agostini, G., Danè, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kamińska, D., Kozyrev, E. A., Krzemien, W., Kupsc, A., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Passeri, A., Patera, V., Perez del Rio, E., Raha, N., Santangelo, P., Schioppa, M., Selce, Andrea, Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wiślicki, W., and Wolke, M.
Subjects: Nuclear and High Energy Physics, Dark forces, e(+) e(-) Collisions, High Energy Physics::Lattice, Electron–positron annihilation, Hadron, Radiation, 01 natural sciences, e+e− Collision, Dark photon, High Energy Physics - Experiment, Subatomär fysik, High Energy Physics::Theory, e+e- Collisions, Dark forces. Gauge vector boson, Upper limits, Astronomi, astrofysik och kosmologi, 0103 physical sciences, Subatomic Physics, Astronomy, Astrophysics and Cosmology, Limit (mathematics), e + e − Collisions, Gauge vector boson, Upper limits, 010306 general physics, Condensed Matter::Quantum Gases, Coupling constant, Physics, Gauge boson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Settore FIS/01 - Fisica Sperimentale, Upper limit, Fine-structure constant, lcsh:QC1-999, Dark force, High Energy Physics::Experiment, Atomic physics, lcsh:Physics
Abstract: We searched for the $\mu^+\mu^-$ decay of a light vector gauge boson, also known as dark photon, in the $e^+ e^- \to \mu^+ \mu^- \gamma_{\rm ISR}$ process by means of the Initial State Radiation (ISR) method. We used 1.93~fb$^{-1}$ of data collected by the KLOE experiment at the DA$\Phi$NE $\phi$-factory. No structures have been observed over the irreducible $\mu^+ \mu^-$ background. A 90\% CL limit on the ratio $\varepsilon^2=\alpha^{\prime}/\alpha$ between the dark coupling constant and the fine structure constant of $ 3\times 10^{-6}-2\times 10^{-7}$ has been set in the dark photon mass region between 519 MeV and 973 MeV. This new limit has been combined with the published result obtained investigating the hypothesis of the dark photon decaying into hadrons in $e^+ e^- \to \pi^+ \pi^- \gamma_{\rm ISR}$ events. The combined 90\% CL limit increases the sensitivity especially in the $\rho-\omega$ interference region and excludes $\varepsilon^2$ greater than $(13-2)\times 10^{-7}$. For dark photon masses greater than 600 MeV the combined limit is lower than 8~$\times\, 10^{-7}$ resulting more stringent than present constraints from other experiments., Comment: 7 pages, 9 figures, 1 table, accepted for publication in Physics Letters B
Published: 2018

46. Measurement of the hadronic cross sections with the CMD-3 and SND detectors at the VEPP-2000 collider

Author: Aleksandr Korol, A. N. Kirpotin, D.A. Epifanov, D.N. Shemyakin, A.S. Popov, Fedor Ignatov, D. B. Shwartz, A.V. Vasiljev, N. Yu. Muchnoi, S. I. Serednyakov, A.E. Bondar, P. Krokovny, Z. K. Silagadze, K.Yu. Mikhailov, A.L. Sibidanov, V.S. Okhapkin, A.S. Kasaev, S.V. Koshuba, T. V. Dimova, L. V. Kardapoltsev, L.B. Epshteyn, N. A. Melnikova, A. A. Botov, Yu. M. Shatunov, I.B. Logashenko, A. I. Senchenko, V. B. Golubev, I. K. Surin, A.N. Amirkhanov, E. V. Pakhtusova, A.V. Bragin, A. V. Berdyugin, N.S. Bashtovoy, M. N. Achasov, A.Yu. Barnyakov, A.N. Kozyrev, A.S. Kuzmin, B.A. Shwartz, D. P. Kovrizhin, E. P. Solodov, A.A. Korobov, A.E. Ryzhenenkov, V.M. Aulchenko, R.R. Akhmetshin, A. P. Lysenko, S.V. Karpov, Yu. A. Tikhonov, P.A. Lukin, S.E. Gayazov, Vassili Kazanin, A.A. Grebenuk, A.A. Ruban, V. P. Druzhinin, Konstantin Beloborodov, Alexey Anisenkov, V. S. Banzarov, A.E. Kuzmenko, G.P. Razuvaev, Yu. A. Rogovsky, D. A. Shtol, A. E. Obrazovsky, Yu.V. Yudin, Alexey Kharlamov, Alexey Talyshev, I. A. Koop, I. M. Zemlyansky, Y. Usov, E.A. Kozyrev, D.E. Berkaev, P. Yu. Shatunov, A.N. Skrinsky, G.V. Fedotovich, E.A. Perevedentsev, S.S. Gribanov, A.L. Erofeev, Yu.N. Pestov, N.M. Ryskulov, V.E. Shebalin, A.I. Vorobiov, V. L. Ivanov, Alexander Bogdanchikov, K. A. Martin, A. S. Kupich, S.I. Eidelman, and D.N. Grigoriev
Subjects: Physics, Muon, Luminosity (scattering theory), 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, QC1-999, Hadron, Detector, 01 natural sciences, law.invention, Nuclear physics, Upgrade, law, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, 010306 general physics, Collider, VEPP-2000, Beam energy
Abstract: Since December 2010 the CMD-3 and SND detectors detectors collect data at the VEPP-2000 electron-positron collider. In 2013-2015 the injection facility of the collider has undergone an upgrade of the injection system. The new BINP injection complex has been connected to the VEPP-2000 collider, so the restrictions connected to the lack of positrons and limited beam energy transfer do not apply any more. The collider luminosity in whole energy range is restricted now only by beam-beam effects. VEPP-2000 collider started to collect data with two detectors at 2016 year. The collected data sample since 2010 corresponds more than 100 pb-1 of integrated luminosity per detector in the c.m. energy between 0.32 and 2GeV. We will report here results of analysis of various hadronic cross sections from detectors both published and preliminary. These measurements are important by themselves and also because of the implications for anomaly of the magnetic moment of a muon (g-2) discrepancy.
Published: 2018

47. Measurement of the e+e−→π+π−π0π0 cross section using initial-state radiation at BABAR

Author: S. H. Robertson, N. Tasneem, R. Godang, E. A. Kravchenko, H. M. Lacker, Aidan Randle-Conde, G. Vasseur, F. De Mori, Crisostomo Sciacca, D. Aston, K. Griessinger, G. Rizzo, A. Oyanguren, G. Wormser, Denis Bernard, R. Cenci, A. Zallo, E. Grauges, Mario Giorgi, T. E. Latham, M. Carpinelli, J. M. Roney, A. J. S. Smith, J. P. Lees, A. M. Eisner, S. Prell, I. Garzia, V. Poireau, A. Soffer, M. Fritsch, C. L. Davis, U. Mallik, T. S. Miyashita, J. Chauveau, S. Luitz, W. Dunwoodie, F. Simonetto, J. G. Smith, A. Lusiani, B. Bhuyan, J. L. Ritchie, V. E. Blinov, D. E. Hutchcroft, J. Cochran, K. Yu Todyshev, B. G. Fulsom, T. Leddig, B. G. Pushpawela, M. V. Purohit, B. N. Ratcliff, J. Albert, V. Santoro, W. S. Lockman, K. T. Flood, T. S. Mattison, Peter S. Kim, M. Piccolo, R. Stroili, W. J. Wisniewski, M. R. Convery, X. C. Lou, S. Passaggio, D. N. Brown, C. P. Jessop, A. M. Rossi, A. G. Denig, J. Va’vra, R. Y. So, V. B. Golubev, G. Batignani, R. Sacco, M. K. Sullivan, C. Hearty, F. F. Wilson, S. Martellotti, D. W. G. S. Leith, J. W. Gary, M. Hess, A. V. Gritsan, E. Ben-Haim, D. J. Summers, P. F. Harrison, M. Röhrken, S. Emery, R. F. Schwitters, F. Di Lodovico, R. C. Field, R. Gorodeisky, R. J. Sobie, A. Palano, Z. C. Huard, L. Vitale, D. J. Payne, D. A. Roberts, G. Calderini, S. Bettarini, C. Hast, M. Rama, D. J. Lange, F. Martinez-Vidal, G. Finocchiaro, I. M. Nugent, G. Piredda, A. M. Lutz, M. T. Graham, A. Hafner, E. M. T. Puccio, J. J. Walsh, J. A. McKenna, W. Panduro Vazquez, E. Luppi, D. S. Chao, M. S. Alam, J. Ocariz, N. Guttman, M. Davier, A. Roodman, F. Anulli, M. Rotondo, G. De Nardo, B. Oberhof, S. M. Spanier, Alessandro Gaz, B. Echenard, T. J. Gershon, R. de Sangro, P. Taras, E. P. Solodov, R. Cheaib, F. Ferroni, R. Waldi, B. T. Meadows, G. D. Lafferty, G. Raven, G. Marchiori, D. Gamba, M. D. Sokoloff, M. Bellis, P. R. Burchat, Elisa Manoni, P. Patteri, C. Buenger, J. M. LoSecco, E. Fioravanti, J. P. Coleman, C. Voss, B. Dey, F. Palombo, T. Lueck, James R. Wilson, W. Gradl, Stephen Robert Wagner, R. Calabrese, K. R. Schubert, C. Cartaro, C. Touramanis, S. J. Sekula, G. Eigen, A. Jawahery, R. Faccini, F. Ferrarotto, A. J. Lankford, F. Le Diberder, A. P. Onuchin, L. Lanceri, E. Paoloni, G. Cibinetto, P. Ongmongkolkul, L. M. Cremaldi, M. Ebert, D. G. Hitlin, F. Forti, Nicola Neri, A. Filippi, D. B. MacFarlane, A. Calcaterra, R. Cowan, Marco Bomben, Douglas Wright, H. A. Neal, G. Casarosa, A. R. Buzykaev, Hamad Ahmed, A. Beaulieu, Yu. G. Kolomensky, V. P. Druzhinin, C. Bozzi, G. Cowan, K. Honscheid, R. J. Barlow, M. Posocco, Yu. I. Skovpen, G. R. Bonneaud, J. Dorfan, M. Verderi, N. Arnaud, Alessandro Pilloni, D. R. Peimer, O. Gruenberg, E. Gabathuler, W. R. Innes, I. M. Peruzzi, Maurizio Biasini, D. R. Muller, Tamara Vazquez Schroeder, Owen Rosser Long, J. A. Ernst, S. I. Serednyakov, F. Bianchi, L. Sun, Tim Adye, S. Dittrich, M. Chrzaszcz, Adrian John Bevan, R. D. Kass, R. Kowalewski, Sw. Banerjee, J. M. Izen, G. Simi, D. Bettoni, Florian Urs Bernlochner, C. Patrignani, V. Tisserand, Martino Margoni, Simon Akar, and R. Prepost
Subjects: Physics, Muon, Photon, Anomalous magnetic dipole moment, 010308 nuclear & particles physics, Electron–positron annihilation, Hadron, BaBar experiment, Electron, 01 natural sciences, Nuclear physics, Positron, 0103 physical sciences, 010306 general physics
Abstract: The process e^+e^− → π^+π^−2π^0γ is investigated by means of the initial-state radiation technique, where a photon is emitted from the incoming electron or positron. Using 454.3 fb^(-1) of data collected around a center-of-mass energy of √s = 10.58 GeV by the BABAR experiment at SLAC, approximately 150000 signal events are obtained. The corresponding nonradiative cross section is measured with a relative uncertainty of 3.6% in the energy region around 1.5 GeV, surpassing all existing measurements in precision. Using this new result, the channel’s contribution to the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon is calculated as (g^(π+π−2π^0)_μ−2)/2=(17.9 ± 0.1_(stat) ± 0.6_(syst))×10^(-10) in the energy range 0.85 GeV < E_(CM) < 1.8 GeV. In the same energy range, the impact on the running of the fine-structure constant at the Z^0-pole is determined as Δα^(π+π−2π0)(M^2_Z) = (4.44 ± 0.02_(stat) ± 0.14_(syst))×10^(-4). Furthermore, intermediate resonances are studied and especially the cross section of the process e^+e^− → ωπ^0 → π^+π^−2π^0 is measured.
Published: 2017

48. Evidence for CP violation in B+→K*(892)+π0 from a Dalitz plot analysis of B+→KS0π+π0 decays

Author: J. W. Gary, R. Gorodeisky, M. Simard, D. A. Roberts, A. M. Lutz, A. M. Eisner, J. Olsen, M. T. Graham, A. Hafner, E. M. T. Puccio, U. Mallik, Douglas Wright, Peter S. Kim, A. G. Denig, A. V. Gritsan, M. Röhrken, Cheng Chen, T. S. Miyashita, N. Neri, M. V. Purohit, A. Palano, R. F. Schwitters, F. De Mori, R. Contri, G. J. King, J. Albert, D. J. Bard, Sridhara Dasu, C. Cartaro, A. Khan, K. T. Flood, David Hutchcroft, L. Piemontese, P. Patteri, Denis Bernard, G. Lynch, Simon Akar, R. Prepost, D. Lindemann, M. J. Lewczuk, Hamad Ahmed, C. Bünger, E. Gabathuler, W. R. Innes, P. F. Harrison, A. Filippi, F. C. Porter, T. Leddig, R. Sacco, A. J. S. Smith, D. B. MacFarlane, A. Calcaterra, S. J. Sekula, A. Jawahery, B. N. Ratcliff, F. Di Lodovico, J. Va’vra, V. Prasad, B. Bhuyan, B. G. Fulsom, A. Adametz, J. Chauveau, E. A. Kravchenko, N. Guttman, B. Stugu, Crisostomo Sciacca, D. Aston, G. Rizzo, G. Marchiori, D. Su, R. Faccini, F. Ferrarotto, A. J. Lankford, F. Le Diberder, J. D. Richman, A. P. Onuchin, Pablo Villanueva-Perez, L. Lanceri, R. Godang, Dmytro Kovalskyi, M. Piccolo, L. M. Cremaldi, H. R. Band, W. S. Lockman, G. Vasseur, I. M. Peruzzi, R. Cowan, B. Echenard, M. Chrzaszcz, J. P. Lees, A. Stocchi, M. Ebert, M. R. Convery, R. Cenci, D. J. Payne, C. Voß, G. Cibinetto, J. L. Ritchie, Marco Bomben, S. Martellotti, J. Ocariz, Maria Roberta Monge, C. H. Cheng, P. Taras, E. P. Solodov, A. Zallo, H. M. Lacker, H. L. Lynch, G. Batignani, Tim Adye, E. Paoloni, J. R. Fry, R. Cheaib, Y. B. Pan, J. Cochran, D. Bettoni, M. Fritsch, S. I. Serednyakov, R. Kowalewski, F. Bianchi, E. O. Olaiya, E. Fioravanti, E. Ben-Haim, R. D. Kass, S. Luitz, R. Waldi, D. G. Hitlin, S. Bettarini, A. J. Bevan, M. Gaspero, V. Santoro, Corrado Angelini, S. Dittrich, G. Onorato, C. P. Jessop, P. Ongmongkolkul, R. de Sangro, S. L. Wu, Florian Urs Bernlochner, R. Y. So, J. J. Walsh, F. Palombo, T. Lueck, D. Lopes Pegna, J. M. LoSecco, V. B. Golubev, B. Dey, Bogdan Malaescu, B. T. Meadows, P. C. Bloom, W. H. Toki, G. Raven, C. Touramanis, S. M. Spanier, M. Hess, Yu. I. Skovpen, R. Andreassen, M. K. Sullivan, B. G. Pushpawela, I. M. Nugent, W. J. Wisniewski, S. Passaggio, H. W. Wulsin, M. D. Sokoloff, V. P. Druzhinin, T. E. Latham, M. Carpinelli, P. R. Burchat, C. Bozzi, G. Cowan, Denis Derkach, K. Honscheid, M. Rotondo, Yu. G. Kolomensky, C. L. Davis, O. Grünberg, G. De Nardo, M. J. Lee, G. Grosdidier, B. A. Schumm, S. Prell, V. E. Blinov, I. Garzia, Alessandro Pilloni, E. Grauges, C. Patrignani, Mario Giorgi, L. T. Kerth, M. Rama, F. Forti, V. Poireau, G. D. Lafferty, Z. C. Huard, D. S. Chao, J. A. McKenna, D. R. Peimer, A. Soffer, R. J. Barlow, J. M. Roney, M. Morandin, A. Lusiani, K. Yu Todyshev, D. W. G. S. Leith, Christopher West, V. Tisserand, G. Wormser, M. Posocco, M. Davier, C. Hast, J. P. Coleman, U. Uwer, F. Anulli, R. Stroili, F. Simonetto, J. M. Izen, R. H. Schindler, G. Calderini, J. G. Smith, D. J. Lange, G. Piredda, H. A. Neal, W. Panduro Vazquez, G. Casarosa, N. Tasneem, Alessandro Gaz, T. M. Hong, S. H. Robertson, T. S. Mattison, Maurizio Biasini, D. R. Muller, Aidan Randle-Conde, Herbert Koch, Martino Margoni, T. J. Gershon, M. Franco Sevilla, A. R. Buzykaev, A. Beaulieu, Tamara Vazquez Schroeder, R. Ayad, James R. Wilson, G. R. Bonneaud, J. Dorfan, D. N. Brown, K. Griessinger, Owen Rosser Long, A. Oyanguren, A. Seiden, F. F. Wilson, X. C. Lou, W. Dunwoodie, C. Hearty, William T. Ford, R. Calabrese, H. H. F. Choi, B. Hamilton, S. Emery, Elisa Manoni, J. A. Ernst, D. J. Summers, G. P. Dubois-Felsmann, P. Roudeau, L. Sun, R. J. Sobie, M. Verderi, S. Playfer, B. Spaan, L. Vitale, F. Martinez-Vidal, Ph Leruste, N. Arnaud, H. Briand, W. Gradl, E. Luppi, M. L. Perl, A. M. Rossi, Sw. Banerjee, G. Eigen, R. C. Field, A. Roodman, G. Finocchiaro, V. Luth, M. S. Alam, A. Snyder, B. Oberhof, T. Pulliam, G. Simi, F. Ferroni, D. Gamba, M. Bellis, P. M. Patel, Stephen Robert Wagner, and K. R. Schubert
Subjects: Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Hadron, Dalitz plot, Elementary particle, 01 natural sciences, Nuclear physics, Particle decay, 0103 physical sciences, CP violation, B meson, 010306 general physics
Abstract: We report a Dalitz plot analysis of charmless hadronic decays of charged B mesons to the final state K^0_Sπ^+π^0 using the full BABAR data set of 470.9±2.8 million BB[overbar] events collected at the Υ(4S)resonance. We measure the overall branching fraction and CP asymmetry to be B(B^+→K^0π^+π^0)=(31.8±1.8±2.1+^(6.0)_(−0.0))×10^(-6) and A_(CP)(B^+→K^0π^+π^0)=0.07±0.05±0.03^(+0.02)_(−0.03), where the uncertainties are statistical, systematic, and due to the signal model, respectively. This is the first measurement of the branching fraction for B^+→K^0π^+π^0. We find first evidence of a CP asymmetry in B^+→K∗(892)+π^0 decays: A_(CP)(B^+→K∗(892)^+π^0)=−0.52±0.14±0.04^(+0.04)_(−0.02). The significance of this asymmetry, including systematic and model uncertainties, is 3.4 standard deviations. We also measure the branching fractions and CP asymmetries for three other intermediate decay modes.
Published: 2017

49. Search for the processe+e−→η′(958)with the CMD-3 detector

Author: N.M. Ryskulov, N. Yu. Muchnoi, A.L. Erofeev, V.S. Okhapkin, B.A. Shwartz, D.N. Grigoriev, D.E. Berkaev, A.E. Ryzhenenkov, S.E. Gayazov, L.B. Epshteyn, R.R. Akhmetshin, E. P. Solodov, V.M. Titov, P. Yu. Shatunov, P. Krokovny, A.A. Ruban, A.V. Bragin, I.B. Logashenko, A.S. Kuzmin, G.V. Fedotovich, A.E. Kuzmenko, V.E. Shebalin, A.I. Vorobiov, S.I. Eidelman, O.A. Kovalenko, A.L. Sibidanov, Yu.V. Yudin, Yu.N. Pestov, I. A. Koop, B.I. Khazin, N.S. Bashtovoy, Yu. A. Rogovsky, E.A. Perevedentsev, F.V. Ignatov, G.P. Razuvaev, Alexey Anisenkov, Alexey Talyshev, E.A. Kozyrev, V.M. Aulchenko, A.N. Kozyrev, D. A. Epifanov, A.L. Romanov, A.E. Bondar, S.V. Karpov, E.N. Gromov, Yu. M. Shatunov, A.S. Popov, P.A. Lukin, K.Yu. Mikhailov, Vassili Kazanin, D.B. Shwartz, D.N. Shemyakin, V.Sh. Banzarov, and A.A. Grebenuk
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Electron–positron annihilation, Detector, Physical chemistry
Abstract: A search for the process e + e − → η ′ ( 958 ) in the π + π − η → π + π − γ γ final state has been performed with the CMD-3 detector at the VEPP-2000 e + e − collider. Using an integrated luminosity of 2.69 pb − 1 collected at the center-of-mass energy E c.m. = 957.68 MeV we set an upper limit for the product of electronic width and branching fractions Γ η ′ ( 958 ) → e + e − ⋅ B η ′ ( 958 ) → π + π − η ⋅ B η → γ γ 0.00041 eV at 90% C.L.
Published: 2015

50. Search for Invisible Decays of a Dark Photon Produced in e+e− Collisions at BaBar

Author: D. J. Payne, M. Verderi, J. Chauveau, F. De Mori, A. M. Rossi, Joseph Izen, S. Martellotti, I. M. Nugent, A. Giuffrida, D. S. Chao, M. Davier, V. B. Golubev, Heiko Lacker, A. Roodman, Roland Waldi, Abner Soffer, J. L. Ritchie, F. Ferroni, U. Mallik, Paul Fraser Harrison, Ju-Young Kim, T. E. Latham, M. Carpinelli, Stephen Robert Wagner, M. K. Sullivan, J. Ocariz, T. S. Miyashita, K. R. Schubert, N. Neri, T. S. Mattison, E. Fioravanti, C. Hast, D. J. Lange, G. Piredda, G. Wormser, A. Palano, Florian Urs Bernlochner, F. Palombo, T. Lueck, R. Y. So, R. Sacco, R. Godang, Z. C. Huard, W. Panduro Vazquez, P. Taras, E. P. Solodov, D. B. MacFarlane, M. Rama, R. Cenci, M. Fritsch, J. W. Gary, J. A. McKenna, David Hutchcroft, E. Paoloni, A. Zallo, T. J. Gershon, T. Schroeder, S. Bettarini, Yu G. Kolomensky, W. S. Lockman, J. P. Coleman, W. R. Innes, F. Anulli, S. Luitz, A. Filippi, P. Patteri, Alessandro Gaz, D. Gamba, J. Va’vra, M. V. Purohit, M. Bellis, R. Cheaib, J. Albert, Elisa Manoni, B. Bhuyan, D. Aston, C. H. Chen, Andrei Gritsan, B. G. Fulsom, J. J. Walsh, S. M. Spanier, J. Dorfan, M. Heß, N. Tasneem, D. N. Brown, R. Faccini, F. Ferrarotto, A. J. Lankford, Mark Derdzinski, R. Cowan, L. M. Cremaldi, M. T. Graham, J. M. LoSecco, J. P. Lees, F. Le Diberder, S. Prell, A. M. Lutz, I. Garzia, A. J.S. Smith, D. G. Hitlin, James H Cochran, B. Dey, G. D. Lafferty, K. Yu Todyshev, R. C. Field, A. Oyanguren, S. H. Robertson, R. Gorodeisky, Herbert Koch, S. Passaggio, R. Stroili, F. Forti, D. A. Roberts, C. H. Cheng, H. A. Neal, P. Ongmongkolkul, K. Griessinger, Aidan Randle-Conde, I. M. Peruzzi, G. Casarosa, C. Bünger, Yu I. Skovpen, R. de Sangro, G. R. Bonneaud, V. Santoro, T. Leddig, A. Lusiani, C. Touramanis, W. J. Wisniewski, Sau Lan Wu, A. Hafner, O. Grünberg, E. M. T. Puccio, A. R. Buzykaev, M. S. Alam, A. Beaulieu, E. Grauges, Mario Giorgi, James R. Wilson, R. Calabrese, G. Eigen, Simon Akar, D. J. Summers, M. Bomben, R. J. Sobie, L. Vitale, F. Martinez-Vidal, Dominik Müller, G. A. Cowan, G. J. King, C. L. Davis, M. Ebert, J. M. Roney, Stephen Sekula, J. G. Smith, V. P. Druzhinin, C. Bozzi, E. Luppi, H. Ahmed, N. Guttman, G. De Nardo, R. F. Schwitters, F. Simonetto, G. Marchiori, A. Jawahery, A. P. Onuchin, X. C. Lou, B. T. Meadows, G. Raven, V. E. Blinov, K. Honscheid, R. J. Barlow, G. Cibinetto, M. Posocco, Crisostomo Sciacca, G. Rizzo, Colin Jessop, R. Prepost, M. D. Sokoloff, P. R. Burchat, A. Calcaterra, D. W. G. S. Leith, G. Calderini, S. Emery, E. A. Kravchenko, G. Vasseur, K. T. Flood, Alessandro Pilloni, D. R. Peimer, C. Hearty, R. Kowalewski, C. Cartaro, Maurizio Biasini, Owen Rosser Long, L. Sun, Adrian John Bevan, Douglas Wright, S. I. Serednyakov, F. Bianchi, S. Dittrich, E. Gabathuler, M. R. Convery, F. C. Porter, A. G. Denig, M. Chrzaszcz, C. Voß, D. Bettoni, B. N. Ratcliff, C. Patrignani, V. Tisserand, A. M. Eisner, Sw. Banerjee, G. Simi, N. Arnaud, Tim Adye, R. D. Kass, Martino Margoni, G. Finocchiaro, M. Rotondo, M. Röhrken, F. F. Wilson, B. Oberhof, V. Poireau, M. Piccolo, P. C. Kim, G. Batignani, E. Ben-Haim, B. Echenard, D. Bernard, W. Dunwoodie, J. A. Ernst, W. Gradl, B. G. Pushpawela, L. Lanceri, and F. Di Lodovico
Subjects: Physics, Particle physics, Muon, 010308 nuclear & particles physics, Electron–positron annihilation, Dark matter, General Physics and Astronomy, Coupling (probability), 01 natural sciences, Dark photon, B-factory, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Production (computer science), 010306 general physics, Boson
Abstract: We search for single-photon events in 53 fb^{-1} of e^{+}e^{-} collision data collected with the BABAR detector at the PEP-II B-Factory. We look for events with a single high-energy photon and a large missing momentum and energy, consistent with production of a spin-1 particle A^{'} through the process e^{+}e^{-}→γA^{'}; A^{'}→invisible. Such particles, referred to as "dark photons," are motivated by theories applying a U(1) gauge symmetry to dark matter. We find no evidence for such processes and set 90% confidence level upper limits on the coupling strength of A^{'} to e^{+}e^{-} in the mass range m_{A^{'}}≤8 GeV. In particular, our limits exclude the values of the A^{'} coupling suggested by the dark-photon interpretation of the muon (g-2)_{μ} anomaly, as well as a broad range of parameters for the dark-sector models.
Published: 2017

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