检索结果-内蒙古大学图书馆

Spectroscopy of the neutron-rich hypernucleus HeΛ7 from electron scattering

Physical Review C 2016年第2期94卷 021302(R)-021302(R)页

作者： T. Gogami C. Chen D. Kawama P. Achenbach A. Ahmidouch I. Albayrak D. Androic A. Asaturyan R. Asaturyan O. Ates P. Baturin R. Badui W. Boeglin J. Bono E. Brash P. Carter A. Chiba E. Christy S. Danagoulian R. De Leo D. Doi M. Elaasar R. Ent Y. Fujii M. Fujita M. Furic M. Gabrielyan L. Gan F. Garibaldi D. Gaskell A. Gasparian Y. Han O. Hashimoto T. Horn B. Hu Ed. V. Hungerford M. Jones H. Kanda M. Kaneta S. Kato M. Kawai H. Khanal M. Kohl A. Liyanage W. Luo K. Maeda A. Margaryan P. Markowitz T. Maruta A. Matsumura V. Maxwell A. Mkrtchyan H. Mkrtchyan S. Nagao S. N. Nakamura A. Narayan C. Neville G. Niculescu M. I. Niculescu A. Nunez Nuruzzaman Y. Okayasu T. Petkovic J. Pochodzalla X. Qiu J. Reinhold V. M. Rodriguez C. Samanta B. Sawatzky T. Seva A. Shichijo V. Tadevosyan L. Tang N. Taniya K. Tsukada M. Veilleux W. Vulcan F. R. Wesselmann S. A. Wood T. Yamamoto L. Ya Z. Ye K. Yokota L. Yuan S. Zhamkochyan L. Zhu Graduate School of Science Tohoku University Sendai Miyagi 980-8578 Japan Department of Physics Hampton University Hampton Virginia 23668 USA Institute for Nuclear Physics Johannes Gutenberg-University D-55099 Mainz Germany Department of Physics North Carolina A&T State University Greensboro North Carolina 27411 USA Department of Physics and Department of Applied Physics University of Zagreb HR-10000 Zagreb Croatia A.I. Alikhanyan National Science Laboratory Yerevan 0036 Armenia Department of Physics Florida International University Miami Florida 27411 USA Department of Physics Computer Science & Engineering Christopher Newport University Newport News Virginia 23606 USA Istituto Nazionale di Fisica Nucleare Sezione di Bari University of Bari I-70126 Bari Italy Department of Physics Southern University at New Orleans New Orleans Lousiana 70126 USA Thomas Jefferson National Accelerator Facility (JLab) Newport News Virginia 23606 USA Department of Physics University of North Carolina Wilmington Wilmington North Carolina 28403 USA INFN Sezione Sanità Istituto Superiore di Sanità 00161 Rome Italy Nuclear Physics Institute Lanzhou University Gansu 730000 China Department of Physics University of Houston Houston Texas 77204 USA Department of Physics Yamagata University Yamagata 990-8560 Japan Mississippi State University Mississippi State Mississippi 39762 USA Department of Physics and Astronomy James Madison University Harrisonburg Virginia 22807 USA Escuela de Ciencias y Tecnologia Universidad Metropolitana San Juan 00928 Puerto Rico Department of Physics & Astronomy Virginia Military Institute Lexington Virginia 24450 USA Department of Physics Xavier University of Louisiana New Orleans Louisiana 70125 USA

The missing mass spectroscopy of the HeΛ7 hypernucleus was performed using the Li7(e,e′K+)HeΛ7 reaction at the Thomas Jefferson National Accelerator Facility Hall C. The Λ-binding energy of the ground-state (1/2+) was determined with a smaller error than that of the previous measurement, being BΛ=5.55±0.10stat.±***. The experiment also provided new insight into charge symmetry breaking in p-shell hypernuclear systems. Finally, a peak at BΛ=3.65±0.20stat.±*** was observed and assigned as a mixture of 3/2+ and 5/2+ states, confirming the “gluelike” behavior of Λ, which makes an unstable state in He6 stable against neutron emission.

关键词： Hypernuclei & mesic nuclei Lepton induced nuclear reactions nuclear binding 6 ≤ A ≤ 19

来源：评论

学校读者我要写书评

暂无评论

Test of lepton universality with B0 → K∗0+− decays

arXiv

引用

arXiv 2017年

作者： Aaij, R. Adeva, B. Adinolfi, M. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Ali, S. Alkhazov, G. Alvarez Cartelle, P. Alves, A.A. Amato, S. Amerio, S. Amhis, Y. An, L. Anderlini, L. Andreassi, G. Andreotti, M. Andrews, J.E. Appleby, R.B. Archilli, F. D'Argent, P. Arnau Romeu, J. Artamonov, A. Artuso, M. Aslanides, E. Auriemma, G. Baalouch, M. Babuschkin, I. Bachmann, S. Back, J.J. Badalov, A. Baesso, C. Baker, S. Balagura, V. Baldini, W. Baranov, A. Barlow, R.J. Barschel, C. Barsuk, S. Barter, W. Baryshnikov, F. Baszczyk, M. Batozskaya, V. Battista, V. Bay, A. Beaucourt, L. Beddow, J. Bedeschi, F. Bediaga, I. Beiter, A. Bel, L.J. Bellee, V. Belloli, N. Belous, K. Belyaev, I. Ben-Haim, E. Bencivenni, G. Benson, S. Beranek, S. Berezhnoy, A. Bernet, R. Berninghoff, D. Bertolin, A. Betancourt, C. Betti, F. Bettler, M.-O. van Beuzekom, M. Bezshyiko, Ia. Bifani, S. Billoir, P. Birnkraut, A. Bitadze, A. Bizzeti, A. Blake, T. Blanc, F. Blouw, J. Blusk, S. Bocci, V. Boettcher, T. Bondar, A. Bondar, N. Bonivento, W. Bordyuzhin, I. Borgheresi, A. Borghi, S. Borisyak, M. Borsato, M. Borysova, M. Bossu, F. Boubdir, M. Bowcock, T.J.V. Bowen, E. Bozzi, C. Braun, S. Britton, T. Brodzicka, J. Buchanan, E. Burr, C. Bursche, A. Buytaert, J. Byczynski, W. Cadeddu, S. Cai, H. Calabrese, R. Calladine, R. Calvi, M. Calvo Gomez, M. Camboni, A. Campana, P. Campora Perez, D.H. Capriotti, L. Carbone, A. Carboni, G. Cardinale, R. Cardini, A. Carniti, P. Carson, L. Carvalho Akiba, K. Casse, G. Cassina, L. Castillo Garcia, L. Cattaneo, M. Cavallero, G. Cenci, R. Chamont, D. Charles, M. Charpentier, Ph. Chatzikonstantinidis, G. Chefdeville, M. Chen, S. Cheung, S.F. Chobanova, V. Chrzaszcz, M. Chubykin, A. Cid Vidal, X. Ciezarek, G. Clarke, P.E.L. Clemencic, M. Cliff, H.V. Closier, J. Coco, V. Cogan, J. Cogneras, E. Cogoni, V. Cojocariu, L. Collins, P. Colombo, T. Comerma-Montells, A. Contu, A. Cook, A. Coombs, G. Coquereau, S. Corti, G. Rio de Janeiro Brazil Rio de Janeiro Brazil Center for High Energy Physics Tsinghua University Beijing China LAPP Université Savoie Mont-Blanc CNRS IN2P3 Annecy-Le-Vieux France Clermont Université Université Blaise Pascal CNRS IN2P3 LPC Clermont-Ferrand France CPPM Aix-Marseille Université CNRS IN2P3 Marseille France LAL Université Paris-Sud CNRS IN2P3 Orsay France LPNHE Université Pierre et Marie Curie Université Paris Diderot CNRS IN2P3 Paris France I. Physikalisches Institut RWTH Aachen University Aachen Germany Fakultät Physik Technische Universität Dortmund Dortmund Germany Heidelberg Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany School of Physics University College Dublin Dublin Ireland Sezione INFN di Bari Bari Italy Sezione INFN di Bologna Bologna Italy Sezione INFN di Cagliari Cagliari Italy Universita e INFN Ferrara Ferrara Italy Sezione INFN di Firenze Firenze Italy Laboratori Nazionali dell'INFN di Frascati Frascati Italy Sezione INFN di Genova Genova Italy Universita INFN Milano-Bicocca Milano Italy Sezione di Milano Milano Italy Sezione INFN di Padova Padova Italy Sezione INFN di Pisa Pisa Italy Sezione INFN di Roma Tor Vergata Roma Italy Sezione INFN di Roma La Sapienza Roma Italy Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Kraków Poland AGH - University of Science and Technology Faculty of Physics and Applied Computer Science Kraków Poland Warsaw Poland Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest-Magurele Romania Gatchina Russia Moscow Russia Moscow Russia Moscow Russia Yandex School of Data Analysis Moscow Russia Budker Institute of Nuclear Physics SB RAS Novosibirsk Russia Protvino Russia ICCUB Universitat de Barcelona Barcelona Spain Universidad de Santiago de Compostela Santiago de Compostela Spain Geneva Switzerland Lausanne Switzerland Physik-Institut Universit

A test of lepton universality, performed by measuring the ratio of the branching fractions of the B0 → K∗0µ+µ− and B0 → K∗0e+e− decays, RK∗0, is presented. The K∗0 meson is reconstructed in the final state K+π−, which is required to have an invariant mass within 100 MeV/c2 of the known K∗(892)0 mass. The analysis is performed using proton-proton collision data, corresponding to an integrated luminosity of about 3 fb−1, collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The ratio is measured in two regions of the dilepton invariant mass squared, q2, to be (equation presented) . The corresponding 95.4% confidence level intervals are [0.52, 0.89] and [0.53, 0.94]. The results, which represent the most precise measurements of RK∗0 to date, are compatible with the Standard Model expectations at the level of 2.1-2.3 and 2.4-2.5 standard deviations in the two q2 regions, respectively. Copyright © 2017, The Authors. All rights reserved.

关键词： Elementary particles

来源：评论

学校读者我要写书评

暂无评论

A Monte Carlo Simulation of Radiation Damage of SiC and Nb Using JA-IPU Code

引用

Journal of Energy and Power engineering 2015年第11期9卷 967-975页

作者： Nagendra Singh Raghaw Vinod Kumar Ambika Tundwal Yury Korovin Jindrich Adam University School of Basic and Applied Sciences GGS Indraprastha University New Delhi 110078 India HENPL (High Energy Nuclear Physics Laboratory) (ADS Program) .University of Rajasthan Jaipur 302004 India INPE (Institute for Nuclear Power Engineering) Kaluga Region Obninsk 249020 Russia Laboratory for Nuclear Problem Joint Institute of Nuclear Research Dubna 141980 Russia

MC （Monte Carlo） simulation code, JA-IPU is used to study radiation damage of SiC irradiated to spallation neutron and AmBe neutron spectra. The code is based on the major physical processes of radiation damage on incorporation of atomic collision cascade and limited to 10 MeV neutron energy. A phenomenological relation for radiation swelling is also derived. Based on the calculation of swelling, DPA （displacement per atom）, defect production efficiency and effective threshold energy, Efff from the data of MC simulation, SiC is inferred to be a highly radiation resistant material when compared with Nb and Ni metals which are used in composition of several reactor steels. Experimental results of hill-hock density measured using AFM （atomic force microscopy）, also confirm radiation resistant behavior of SiC.

关键词： Monte-Carlo simulation radiation resistant material DPA effective damage threshold energy.

来源：评论

学校读者我要写书评

暂无评论

Neutron Irradiation Swelling of SiC and SiC f /SiC for Advanced nuclear Applications

引用

Energy Procedia 2015年 71卷 328-336页

作者： Mohd Idzat Idris Hiroshi Konishi Masamitsu Imai Katsumi Yoshida Toyohiko Yano Department of Nuclear Engineering Graduate School of Science and Engineering Tokyo Institute of Technology 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan The National University of Malaysia School of Applied Physics Faculty of Science and Technology 43600 Bangi Selangor Malaysia Research Laboratory for Nuclear Reactors Tokyo Institute of Technology 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan

Silicon carbide (SiC) is used as a layer in TRISO fuel of high temperature gas-cooled reactors because of its excellent thermal and mechanical properties. SiC fiber-reinforced SiC composites (SiC f /SiC) are also a candidate material for structural material for fusion reactor blanket and cladding materials of advance fission reactors. In this research, seven of monolithic SiC or SiC f /SiC composites materials with different fabrication processes were irradiated in the BR2 reactor up to a fluence of 2.0-2.5×10 24 (E>0.1 MeV) at 333-363 K. Changes in macroscopic lengths and lattice parameters before and after the neutron irradiation were measured. Furthermore, microstructure of SiC f /SiC composites was investigated using a scanning electron microscope, too. Results showed that after the neutron irradiation, the group of SiC and SiC f /SiC composites were swelled approximately 1.24∼1.33% and 1.00∼1.19% in length, respectively. Apparently the presence of fibers resulted in smaller swelling. It may be attributed for smaller swelling of SiC fibers. Further difference in swelling may be caused by the presence of different sintering additives.

关键词： Radiation swelling Silicon carbide SiC f /SiC Neutron irradiation

来源：评论

学校读者我要写书评

暂无评论

High resolution spectroscopic study of BeΛ10

引用

Physical Review C 2016年第3期93卷 034314-034314页

作者： T. Gogami C. Chen D. Kawama P. Achenbach A. Ahmidouch I. Albayrak D. Androic A. Asaturyan R. Asaturyan O. Ates P. Baturin R. Badui W. Boeglin J. Bono E. Brash P. Carter A. Chiba E. Christy S. Danagoulian R. De Leo D. Doi M. Elaasar R. Ent Y. Fujii M. Fujita M. Furic M. Gabrielyan L. Gan F. Garibaldi D. Gaskell A. Gasparian Y. Han O. Hashimoto T. Horn B. Hu Ed. V. Hungerford M. Jones H. Kanda M. Kaneta S. Kato M. Kawai H. Khanal M. Kohl A. Liyanage W. Luo K. Maeda A. Margaryan P. Markowitz T. Maruta A. Matsumura V. Maxwell A. Mkrtchyan H. Mkrtchyan S. Nagao S. N. Nakamura A. Narayan C. Neville G. Niculescu M. I. Niculescu A. Nunez Nuruzzaman Y. Okayasu T. Petkovic J. Pochodzalla X. Qiu J. Reinhold V. M. Rodriguez C. Samanta B. Sawatzky T. Seva A. Shichijo V. Tadevosyan L. Tang N. Taniya K. Tsukada M. Veilleux W. Vulcan F. R. Wesselmann S. A. Wood T. Yamamoto L. Ya Z. Ye K. Yokota L. Yuan S. Zhamkochyan L. Zhu Department of Physics Graduate School of Science Tohoku University Sendai Miyagi 980-8578 Japan Department of Physics Hampton University Hampton Virginia 23668 USA Institute for Nuclear Physics Johannes Gutenberg-University D-55099 Mainz Germany Department of Physics North Carolina A&T State University Greensboro North Carolina 27411 USA Department of Physics & Department of Applied Physics University of Zagreb HR-10000 Zagreb Croatia A.I. Alikhanyan National Science Laboratory Yerevan 0036 Armenia Department of Physics Florida International University Miami Florida 27411 USA Department of Physics Computer Science & Engineering Christopher Newport University Newport News Virginia 23606 USA Istituto Nazionale di Fisica Nucleare Sezione di Bari and University of Bari I-70126 Bari Italy Department of Physics Southern University at New Orleans New Orleans Louisiana 70126 USA Thomas Jefferson National Accelerator Facility (JLab) Newport News Virginia 23606 USA Department of Physics University of North Carolina at Wilmington Wilmington North Carolina 28403 USA INFN Sezione Sanità and Istituto Superiore di Sanità 00161 Rome Italy Nuclear Physics Institute Lanzhou University Lanzhou Gansu 730000 China Department of Physics University of Houston Houston Texas 77204 USA Department of Physics Yamagata University Yamagata 990-8560 Japan Mississippi State University Mississippi State Mississippi 39762 USA Department of Physics and Astronomy James Madison University Harrisonburg Virginia 22807 USA Escuela de Ciencias y Tecnologia Universidad Metropolitana San Juan 00928 Puerto Rico Department of Physics & Astronomy Virginia Military Institute Lexington Virginia 24450 USA Department of Physics Xavier University of Louisiana New Orleans Louisiana 70125 USA

Spectroscopy of a BeΛ10 hypernucleus was carried out at JLab Hall C using the (e,e′K+) reaction. A new magnetic spectrometer system (SPL+HES+HKS), specifically designed for high resolution hypernuclear spectroscopy, was used to obtain an energy spectrum with a resolution of ∼0.78 MeV (FWHM). The well-calibrated spectrometer system of the present experiment using p(e,e′K+)Λ,Σ0 reactions allowed us to determine the energy levels; and the binding energy of the ground-state peak (mixture of 1− and 2− states) was found to be BΛ=8.55±0.07(stat.)±0.11(sys.) MeV. The result indicates that the ground-state energy is shallower than that of an emulsion study by about 0.5 MeV which provides valuable experimental information on the charge symmetry breaking effect in the ΛN interaction.

关键词： Energy levels & level densities Hypernuclei & mesic nuclei 6 ≤ A ≤ 19 Spectrometers & spectroscopic techniques

来源：评论

学校读者我要写书评

暂无评论

Dynamical Lamb effect versus dissipation in superconducting quantum circuits

引用

Physical Review A 2016年第6期93卷 063845-063845页

作者： A. A. Zhukov D. S. Shapiro W. V. Pogosov Yu. E. Lozovik N. L. Dukhov All-Russia Research Institute of Automatics 127055 Moscow Russia National Research Nuclear University (MEPhI) 115409 Moscow Russia V. A. Kotel'nikov Institute of Radio Engineering and Electronics Russian Academy of Sciences 125009 Moscow Russia Moscow Institute of Physics and Technology Dolgoprudny 141700 Moscow Region Russia National University of Science and Technology MISIS 119049 Moscow Russia Institute for Theoretical and Applied Electrodynamics Russian Academy of Sciences 125412 Moscow Russia Institute of Spectroscopy Russian Academy of Sciences 142190 Moscow Region Troitsk Russia Moscow Institute of Electronics and Mathematics National Research University Higher School of Economics 101000 Moscow Russia

Superconducting circuits provide a new platform for study of nonstationary cavity QED phenomena. An example of such a phenomenon is the dynamical Lamb effect, which is the parametric excitation of an atom due to nonadiabatic modulation of its Lamb shift. This effect was initially introduced for a natural atom in a varying cavity, while we suggest its realization in a superconducting qubit-cavity system with dynamically tunable coupling. In the present paper, we study the interplay between the dynamical Lamb effect and the energy dissipation, which is unavoidable in realistic systems. We find that despite naive expectations, this interplay can lead to unexpected dynamical regimes. One of the most striking results is that photon generation from vacuum can be strongly enhanced due to qubit relaxation, which opens another channel for such a process. We also show that dissipation in the cavity can increase the qubit excited-state population. Our results can be used for experimental observation and investigation of the dynamical Lamb effect and accompanying quantum effects.

关键词： Quantum description of light-matter interaction Superconducting qubits

来源：评论

学校读者我要写书评

暂无评论

Abstracts from Hydrocephalus 2016 Abstracts

引用

FLUIDS AND BARRIERS OF THE CNS 2017年第SUPPL 1期14卷 1-21页

作者： [Anonymous] Johns Hopkins University Baltimore MD USA. Department of Neurosurgery Johns Hopkins University Baltimore MD USA. Johns Hopkins Biostatistics Center Johns Hopkins Bloomberg School of Public Health Baltimore MD USA. Johns Hopkins Bloomberg School of Public Health Baltimore MD USA. Department of Neurosurgery Johns Hopkins University School of Medicine Baltimore MD USA. Johns Hopkins Aramco Healthcare Dhahran Saudi Arabia. Johns Hopkins Hopkins Aramco Healthcare Dhahran Saudi Arabia. Johns Hopkins Aramco Healthcare Ras Tanura Saudi Arabia. Primary Care Johns Hopkins Aramco Healthcare Ras Tanura Saudi Arabia. Bloomberg School of Public Health Johns Hopkins University Baltimore MD USA. Department of Neurosurgery Rhode Island Hospital Providence RI USA. Department of Epidemiology Johns Hopkins Bloomberg School of Public Health Baltimore MD USA. The Interface Group Institute of PhysiologyUniversity of Zurich Zurich Switzerland. Institute of Physiology University of Zurich Zurich Switzerland. Neuroscience Center Zurich and the Zurich Center for Integrative Human Physiology University of Zurich Zurich Switzerland. BioFlowImage Laboratory University of Picardie Jules Verne Amiens France. Reims Mathematics Laboratory University of Reims Champagne-Ardenne Reims France. Image Processing Laboratory University Hospital of Amiens-Picardie Amiens France. BioFlowImage Laboratory Department of Medical Image Processing University Hospital of Picardie Jules Verne Amiens France. Department of Geriatric University Hospital of Toulouse Toulouse France. Departments of Geriatric University Hospital of Toulouse Toulouse France. Department of Geriatry University Hospital Toulouse Toulouse France. Neurosciences department University of Cambridge Cambridge UK. Brain Physics Lab Academic Neurosurgery University of Cambridge Cambridge UK. Department of Nuclear Medicine University Hospital of Toulouse Toulouse France. Department of Nuclear Medicine University Hospit

来源：评论

学校读者我要写书评

暂无评论

Study of the production of Λ_b^0 band ~0 hadrons in pp collisions and first measurement of the Λ_b^0→J/ψpK^- branching fraction

引用

Chinese physics C 2016年第1期40卷 1-16页

作者： O.Kochebina M.Kolpin I.Komarov R.F.Koopman P.Koppenburg M.Kozeiha L.Kravchuk K.Kreplin M.Kreps G.Krocker P.Krokovny F.Kruse W.Krzemien W.Kucewicz M.Kucharczyk V.Kudryavtsev A.K.Kuonen K.Kurek T.Kvaratskheliya D.Lacarrere G.Lafferty A.Lai D.Lambert G.Lanffanchi C.Langenbruch B.Langhans T.Latham C.Lazzeroni R.Le Gac J.van Leerdam J.-P.Lees R.Lefevre A.Leflat J.Lefrancois E.Lemos Cid O.Leroy T.Lesiak B.Leverington Y.Li T.Likhomanenko M.Liles R.Lindner C.Linn F.Lionetto B.Liu X.Liu D.Loh I.Longstaff J.H.Lopes D.Lucchesi M.Lucio Martinez H.Luo A.Lupato E.Luppi O.Lupton A.Lusiani F.Machefert F.Maciuc O.Maev K.Maguire S.Malde A.Malinin G.Manca G.Mancinelli P.Manning A.Mapelli J.Maratas J.F.Marchand U.Marconi C.Marin Benito P.Marino J.Marks G.Martellottil M.Martin M.Martinelli D.Martinez Santos F.Martinez Vidal D.Martins Tostes A.Massafferri R.Matev A.Mathad Z.Mathe C.Matteuzzi A.Mauri B.Maurin A.Mazurov M.McCann J.McCarthy A.McNab R.McNulty B.Meadows F.Meier M.Meissner D.Melnychuk M.Merk E Michielin D.A.Milanes M.-N.Minard D.S.Mitzel J.Molina Rodrigue I.A.Monroy S.Monteil M.Morandin P.Morawski A.Morda M.J.Morello J.Moron A.B.Morris R.Mountain F.Muheim D.Miiller J.Muller K.Muller V.Muller M.Mussini B.Muster P.Naik T.Nakada R.Nandakumar A.Nandi I.Nasteva M.Needham N.Neri S.Neubert N.Neufeld M.Neuner A.D.Nguyen T.D.Nguyen C.Nguyen-Mau V.Niess R.Niet N.Nikitin T.Nikodem D.Ninci A.Novoselov D.P.O'Hanlon A.Oblakowska-Mucha V.Obraztsov S.Ogilvy O.Okhrimenko R.Oldeman C.J.G.Onderwater B.Osorio Rodrigues J.M.Otalora Goicochea A.Otto P.Owen A.Oyanguren A.Palano F.Palombo M.Palutan J.Panman A.Papanestis M.Pappagallo L.L.Pappalardo C.Pappenheimer C.Parkes G.Passaleva G.D.Patel M.Patel C.Patrignani A.Pearce A.Pellegrino G.Penso M.Pepe Altarelli S.Perazzini P.Perret L.Pescatore K.Petridis A.Petrolini M.Petruzzo E.Picatoste Olloqui B.Pietrzyk T:.Pilar D.Pinci A.Pistone A.Piucci S.Playfer M.Plo Casasus T.Poikela F.Polci A.Poluektov I.Polyakov E.Polycarpo A.Popov D.Popov B.Popovici C.Potterat E.Price J.D.Price J.Prisciandaro A.Pritchard Centro Brasileiro de Pesquisas Ffsicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina LAPP Universite Savoie Mont-BlancCNRS/IN2P3Annecy-Le-VieuxFrance Clermont Universite Universite Blaise PascalCNRS/IN2P3LPCclermont-FerrandFrance CPPM Aix-Marseille UniversitYCNRS/IN2P3MarseilleFrance LAL Universite Paris-SudCNRS/IN2P3OrsayFrance LPNHE Universite Pierre et Marie CurieUniversite Paris DiderotCNRS/IN2P3ParisFrance Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-lnstitut fur Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland Sezione INFN di Bari BariItaly Sezione INFN di Bologna BolognaItaly Sezione INFN di Cagliari CagliariItaly Sezione INFN di Ferrara FerraraItaly Sezione INFN di Firenze FirenzeItaly Laboratori Nazionali dell'INFN di Prascati FrascatiItaly Sezione INFN di Genova GenovaItaly Sezione INFN di Milnno Bicocca MilunoItaly Sezione INFN di Milano MilanoItaly Sezione INFN di Padova PadovaItaly Sezione INFN di Pisa PisaItaly Sezione INFN di Roma Tor Vergata RomaItaly Sezione INFN di Roma La Sapienza RomaItaly Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Krak6wPoland AGH-University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakowPoland National Center for Nuclear Research(NCBJ) WarsawPoland Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest-MagureleRomania Petersburg Nuclear Physics Institute(PNPI) GatchinaRussia Institute of Theoretical and Experimental Physics(ITEP) MoscowRussia Institute of Nuclear Physics Moscow State University(SINP MSU)MoscowRussia Institute for Nuclear Research of the Russian Academy of Sciences(INR RAN) MoscowRussia Budker Institute of Nuclear Physics(SB RAS)and Novosibirsk State University No

The product of the ∧0/b （-B/0） differential production cross-section and the branching fraction of the decay ∧0/b→ J/ψ pK-（-B/0→ J/ψ-K＊（892）0）is measured as a function of the beauty hadron transverse momentum, PT, and rapidity, y. The kinematic region of the measurements is pT〈20 GeV/c and 2.0 〈g〈*** measurements use a data sample corresponding to an integrated luminosity of 3fb-1 collected by the LHCb detector in pp collisions at centre-of-mass energies √s=7 TeV in 2011 and √s=8 TeV in 2012. Based on previous LHCb results of the fragmentation fraction ratio,f∧0/b/fd,the branching fraction of the decay ∧0/b→ J/ψ pK-is measured to be B（∧0/b→ J/ψ pK-）=（3.17±0.04±0.07±0.34＋0.45/-0.28）×10-4,where the first uncertainty is statistical, the second is systematic, the third is due to the uncertainty on the branching fraction of the decay -B/0 →J/ψ-K＊（892）0,and the fourth is due to the knowledge of f∧0/b/*** sum of the asymmetries in the production and decay between ∧0/b and ∧0/bis also measured as a function of PT and *** previously published branching fraction of ∧0/b→ J/ψ pπ-,relative to that of ∧0/b→ J/ψ pK-,is updated. The branching fractions of ∧0/b→P＋c（→ J/ψp）K-are determined.

关键词： production cross-section branching fraction b hadrons proton-proton collisions

来源：评论

学校读者我要写书评

暂无评论

μs isomers of Nd158,160

引用

Physical Review C 2016年第6期94卷 064322-064322页

作者： E. Ideguchi G. S. Simpson R. Yokoyama Mn. Tanaka S. Nishimura P. Doornenbal G. Lorusso P.-A. Söderström T. Sumikama J. Wu Z. Y. Xu N. Aoi H. Baba F. L. Bello Garrote G. Benzoni F. Browne R. Daido Y. Fang N. Fukuda A. Gottardo G. Gey S. Go N. Inabe T. Isobe D. Kameda K. Kobayashi M. Kobayashi I. Kojouharov T. Komatsubara T. Kubo N. Kurz I. Kuti Z. Li M. Matsushita S. Michimasa C.-B. Moon H. Nishibata I. Nishizuka A. Odahara Z. Patel S. Rice E. Sahin H. Sakurai H. Schaffner L. Sinclair H. Suzuki H. Takeda J. Taprogge Zs. Vajta H. Watanabe A. Yagi Research Center for Nuclear Physics (RCNP) Osaka University Ibaraki Osaka 567-0047 Japan LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France School of Engineering University of the West of Scotland Paisley PA1 2BE United Kingdom Scottish Universities Physics Alliance University of Glasgow Glasgow G12 8QQ United Kingdom Center for Nuclear Study (CNS) University of Tokyo Wako-shi Saitama 351-0198 Japan RIKEN Nishina Center RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China Department of Physics University of Tokyo Hongo Bunkyo-ku Tokyo 113-0033 Japan Department of Physics University of Oslo Oslo Norway INFN Sezione di Milano I-20133 Milano Italy School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4JG United Kingdom Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan Dipartimento di Fisica dellUniversità degli Studi di Padova I-35131 Padova Italy INFN Laboratori Nazionali di Legnaro Legnaro I-35020 Italy Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Department of Physics Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima-ku Tokyo 171-8501 Japan GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany Research Facility Center for Pure and Applied Science University of Tsukuba Ibaraki 305-8577 Japan Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Korea MTA Atomki P. O. Box 51 Debrecen H-4001 Hungary Hoseo University Asan Chungnam 336-795 Korea Department of Physics University of Surrey Guildford GU2 7XH United Kingdom Department of Physics University of York Heslington York YO10 5DD United Kingdom Instituto de Estructura de la Materia CSIC E-2

The neutron-rich nuclei Nd158,160 have been studied via delayed γ-ray spectroscopy of μs isomeric states at the RIBF facility, RIKEN. These nuclei were produced following the projectile fission of a 345 AMeVU238 beam and delayed γ rays were detected by the EURICA cluster Ge array. The isomeric states have measured half-lives of 339(20) ns and 1.63(21) μs for Nd158 and Nd160, respectively. From the observed γ decays and the systematics of levels in the neighboring Nd isotopes first level schemes were constructed for these nuclei. The isomeric states of Nd158,160 have been assigned spins of (6−) and (4−), with proposed ν5/2[523]⊗ν7/2[633] and ν1/2[521]⊗ν7/2[633] configurations, respectively.

关键词： Electromagnetic transitions Isomer decays Lifetimes & widths nuclear structure & decays 150 ≤ A ≤ 189

来源：评论

学校读者我要写书评

暂无评论

New measurement of θ13 via neutron capture on hydrogen at Daya Bay

引用

Physical Review D 2016年第7期93卷 072011-072011页

作者： F. P. An A. B. Balantekin H. R. Band M. Bishai S. Blyth D. Cao G. F. Cao J. Cao W. R. Cen Y. L. Chan J. F. Chang L. C. Chang Y. Chang H. S. Chen Q. Y. Chen S. M. Chen Y. X. Chen Y. Chen J. H. Cheng J.-H. Cheng J. Cheng Y. P. Cheng Z. K. Cheng J. J. Cherwinka M. C. Chu A. Chukanov J. P. Cummings J. de Arcos Z. Y. Deng X. F. Ding Y. Y. Ding M. V. Diwan M. Dolgareva J. Dove D. A. Dwyer W. R. Edwards R. Gill M. Gonchar G. H. Gong H. Gong M. Grassi W. Q. Gu M. Y. Guan L. Guo R. P. Guo X. H. Guo Z. Guo R. W. Hackenburg R. Han S. Hans M. He K. M. Heeger Y. K. Heng A. Higuera Y. K. Hor Y. B. Hsiung B. Z. Hu T. Hu W. Hu E. C. Huang H. X. Huang X. T. Huang P. Huber W. Huo G. Hussain D. E. Jaffe P. Jaffke K. L. Jen S. Jetter X. P. Ji X. L. Ji J. B. Jiao R. A. Johnson J. Joshi L. Kang S. H. Kettell S. Kohn M. Kramer K. K. Kwan M. W. Kwok T. Kwok T. J. Langford K. Lau L. Lebanowski J. Lee J. H. C. Lee R. T. Lei R. Leitner J. K. C. Leung C. Li D. J. Li F. Li G. S. Li Q. J. Li S. Li S. C. Li W. D. Li X. N. Li Y. F. Li Z. B. Li H. Liang C. J. Lin G. L. Lin S. Lin S. K. Lin Y.-C. Lin J. J. Ling J. M. Link L. Littenberg B. R. Littlejohn D. W. Liu J. J. Liu J. L. Liu J. C. Liu C. W. Loh C. Lu H. Q. Lu J. S. Lu K. B. Luk Z. Lv Q. M. Ma X. Y. Ma X. B. Ma Y. Q. Ma Y. Malyshkin D. A. Martinez Caicedo K. T. McDonald R. D. McKeown I. Mitchell M. Mooney Y. Nakajima J. Napolitano D. Naumov E. Naumova H. Y. Ngai Z. Ning J. P. Ochoa-Ricoux A. Olshevskiy H.-R. Pan J. Park S. Patton V. Pec J. C. Peng L. Pinsky C. S. J. Pun F. Z. Qi M. Qi X. Qian N. Raper J. Ren R. Rosero B. Roskovec X. C. Ruan H. Steiner G. X. Sun J. L. Sun W. Tang D. Taychenachev T. Konstantin K. V. Tsang C. E. Tull N. Viaux B. Viren V. Vorobel C. H. Wang M. Wang N. Y. Wang R. G. Wang W. Wang W. W. Wang X. Wang Y. F. Wang Z. Wang Z. M. Wang H. Y. Wei L. J. Wen K. Whisnant C. G. White L. Whitehead T. Wise H. L. H. Wong S. C. F. Wong E. Worcester C.-H. Wu Q. Wu D. M. Xia J. K. Xia Z. Z. Xing J. Y. Xu J. L. Xu J. Xu Y. Xu T. Xue J. Yan C. G. Yang H. Yang L. Yang M. S. Yang M. T. Institute of Modern Physics East China University of Science and Technology Shanghai University of Wisconsin Madison Wisconsin 53706 USA Department of Physics Yale University New Haven Connecticut 06520 USA Brookhaven National Laboratory Upton New York 11973 USA Department of Physics National Taiwan University Taipei National United University Miao-Li Nanjing University Nanjing Institute of High Energy Physics Beijing Chinese University of Hong Kong Hong Kong Institute of Physics National Chiao-Tung University Hsinchu Shandong University Jinan Department of Engineering Physics Tsinghua University Beijing North China Electric Power University Beijing Shenzhen University Shenzhen Sun Yat-Sen (Zhongshan) University Guangzhou Joint Institute for Nuclear Research Dubna Moscow Region Siena College Loudonville New York 12211 USA Department of Physics Illinois Institute of Technology Chicago Illinois 60616 USA Department of Physics University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Lawrence Berkeley National Laboratory Berkeley California 94720 USA Department of Physics and Astronomy Shanghai Jiao Tong University Shanghai Laboratory for Particle Physics and Cosmology Shanghai Beijing Normal University Beijing Department of Physics University of Houston Houston Texas 77204 USA Center for Neutrino Physics Virginia Tech Blacksburg Virginia 24061 USA China Institute of Atomic Energy Beijing University of Science and Technology of China Hefei School of Physics Nankai University Tianjin Department of Physics University of Cincinnati Cincinnati Ohio 45221 USA Dongguan University of Technology Dongguan Department of Physics University of California Berkeley California 94720 USA Department of Physics The University of Hong Kong Pokfulam Hong Kong Charles University Faculty of Mathematics and Physics Prague Czech Republic Joseph Henry Laboratories Princeton University Princeton New Jersey 08544 USA Xi’an Jiaotong University Xi’an Instit

This article reports an improved independent measurement of neutrino mixing angle θ13 at the Daya Bay Reactor Neutrino Experiment. Electron antineutrinos were identified by inverse β-decays with the emitted neutron captured by hydrogen, yielding a data set with principally distinct uncertainties from that with neutrons captured by gadolinium. With the final two of eight antineutrino detectors installed, this study used 621 days of data including the previously reported 217-day data set with six detectors. The dominant statistical uncertainty was reduced by 49%. Intensive studies of the cosmogenic muon-induced Li9 and fast neutron backgrounds and the neutron-capture energy selection efficiency, resulted in a reduction of the systematic uncertainty by 26%. The deficit in the detected number of antineutrinos at the far detectors relative to the expected number based on the near detectors yielded sin22θ13=0.071±0.011 in the three-neutrino-oscillation framework. The combination of this result with the gadolinium-capture result is also reported.

关键词： Neutrino oscillations

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：