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Measurement of spin-density matrix elements for ϕ-meson photoproduction from protons and deuterons near threshold

Physical Review C 2010年第1期82卷 015205-015205页

作者： W. C. Chang D. S. Ahn J. K. Ahn H. Akimune Y. Asano S. Daté H. Ejiri H. Fujimura M. Fujiwara S. Fukui S. Hasegawa K. Hicks K. Horie T. Hotta K. Imai T. Ishikawa T. Iwata Y. Kato H. Kawai K. Kino H. Kohri N. Kumagai P. J. Lin S. Makino T. Matsuda T. Matsumura N. Matsuoka T. Mibe M. Miyabe Y. Miyachi N. Muramatsu T. Nakano M. Niiyama M. Nomachi Y. Ohashi H. Ohkuma T. Ooba D. S. Oshuev C. Rangacharyulu A. Sakaguchi P. M. Shagin Y. Shiino H. Shimizu Y. Sugaya M. Sumihama Y. Toi H. Toyokawa M. Uchida A. Wakai C. W. Wang S. C. Wang K. Yonehara T. Yorita M. Yoshimura M. Yosoi R. G. T. Zegers Institute of Physics Academia Sinica Taipei 11529 Taiwan Research Center for Nuclear Physics Osaka University Ibaraki Osaka 567-0047 Japan Department of Physics Pusan National University Busan 609-735 Korea Department of Physics Konan University Kobe Hyogo 658-8501 Japan XFEL Project Head Office RIKEN 1-1 Koto Sayo Hyogo 679-5148 Japan Japan Synchrotron Radiation Research Institute Sayo Hyogo 679-5143 Japan Laboratory of Nuclear Science Tohoku University Sendai Miyagi 982-0826 Japan Quantum Beam Science Directorate Gamma-ray Nondestructive Assay Research Group Japan Atomic Energy Agency Tokai-mura Ibaraki 319-1195 Japan Department of Physics Nagoya University Aichi 464-8602 Japan Department of Physics and Astronomy Ohio University Athens Ohio 45701 USA Department of Physics Kyoto University Kyoto 606-8502 Japan Department of Physics Yamagata University Yamagata 990-8560 Japan Department of Physics Chiba University Chiba 263-8522 Japan Department of Physics National Kaohsiung Normal University Kaohsiung 824 Taiwan Wakayama Medical University Wakayama 641-8509 Japan Department of Applied Physics Miyazaki University Miyazaki 889-2192 Japan Department of Applied Physics National Defense Academy in Japan Yokosuka Kanagawa 239-8686 Japan Department of Physics Osaka University Toyonaka Osaka 560-0043 Japan Department of Physics and Engineering Physics University of Saskatchewan Saskatoon SK S7N 5E2 Canada School of Physics and Astronomy University of Minnesota Minneapolis Minnesota 55455 USA Department of Physics Tokyo Institute of Technology Tokyo 152-8551 Japan Akita Research Institute of Brain and Blood Vessels Akita 010-0874 Japan Institute for Protein Research Osaka University Suita Osaka 565-0871 Japan National Superconducting Cyclotron Laboratory Michigan State University East Lansing Michigan 48824 USA

The LEPS/SPring-8 experiment made a comprehensive measurement of the spin-density matrix elements for γp→ϕp, γd→ϕpn, and γd→ϕd at forward production angles. A linearly polarized photon beam at Eγ=1.6–2.4 GeV was used for the production of ϕ mesons. The natural-parity Pomeron exchange processes remain dominant near threshold. The unnatural-parity processes of pseudoscalar exchange is visible in the production from the nucleons but is greatly reduced in the coherent production from deuterons. There is no strong Eγ dependence, but there is some dependence on momentum transfer. A small but finite value of the spin-density matrix elements reflecting helicity-nonconserving amplitudes in the t-channel is observed.

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Characteristics of electrochemical detector with biological material for efficient detection of neutrinos

Memoirs of the Faculty of Engineering, Kyushu University

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Memoirs of the Faculty of engineering, Kyushu University 2009年第4期69卷 131-138页

作者： Terao, Norichika Ishibashi, Kenji Halim, Md. Abdul Arima, Hidehiko Department of Applied Quantum Physics and Nuclear Engineering Department of Applied Science for Electronics and Materials Interdisciplinary Graduate School of Engineering Sciences Japan

Electrochemical detectors were fabricated to consist of two electrodes with raw silk and purified water in a Teflon container. The detectors generated output voltage through copper conduction wires in the environmental neutrino circumstances. The influences of electrode gold purity, conduction wire materials and fast-reactor neutrino irradiation were studied on the output voltage of the detectors. The detectors with higher-purity gold electrode promoted the faster time-evolution of the output voltage. Use of wire materials of gold produced the highest output voltage, while that of iron gave the almost half voltage. The irradiation of fast reactor neutrinos reduced the output voltage to an half level.

关键词： Irradiation

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Erratum: Scaled momentum spectra in deep inelastic scattering at HERA

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Journal of High Energy physics 2010年第10期2010卷 1-6页

作者： H. Abramowicz I. Abt L. Adamczyk M. Adamus S. Antonelli P. Antonioli A. Antonov M. Arneodo V. Aushev Y. Aushev O. Bachynska A. Bamberger A. N. Barakbaev G. Barbagli G. Bari F. Barreiro D. Bartsch M. Basile O. Behnke J. Behr U. Behrens L. Bellagamba A. Bertolin S. Bhadra M. Bindi C. Blohm T. Bod E. G. Boos M. Borodin K. Borras D. Boscherini D. Bot S. K. Boutle I. Brock E. Brownson R. Brugnera N. Brümmer A. Bruni G. Bruni B. Brzozowska P. J. Bussey J. M. Butterworth B. Bylsma A. Caldwell M. Capua R. Carlin C. D. Catterall S. Chekanov J. Chwastowski J. Ciborowski R. Ciesielski L. Cifarelli F. Cindolo A. Contin A. M. Cooper-Sarkar N. Coppola M. Corradi F. Corriveau M. Costa G. D’Agostini F. Dal Corso J. de Favereau J. del Peso R. K. Dementiev S. De Pasquale M. Derrick R. C. E. Devenish D. Dobur B. A. Dolgoshein A. T. Doyle V. Drugakov L. S. Durkin S. Dusini Y. Eisenberg P. F. Ermolov A. Eskreys S. Fang S. Fazio J. Ferrando M. I. Ferrero J. Figiel M. Forrest B. Foster S. Fourletov A. Galas E. Gallo A. Garfagnini A. Geiser I. Gialas L. K. Gladilin D. Gladkov C. Glasman O. Gogota Yu. A. Golubkov P. Göttlicher I. Grabowska-Bod J. Grebenyuk I. Gregor G. Grigorescu G. Grzelak C. Gwenlan T. Haas W. Hain R. Hamatsu J. C. Hart H. Hartmann G. Hartner E. Hilger D. Hochman U. Holm R. Hori K. Horton A. Hüttmann G. Iacobucci Z. A. Ibrahim Y. Iga R. Ingbir M. Ishitsuka H.-P. Jakob F. Januschek M. Jimenez T. W. Jones M. Jüngst I. Kadenko B. Kahle B. Kamaluddin S. Kananov T. Kanno U. Karshon F. Karstens I. I. Katkov M. Kaur P. Kaur A. Keramidas L. A. Khein J. Y. Kim D. Kisielewska S. Kitamura R. Klanner U. Klein E. Koffeman D. Kollar P. Kooijman Ie. Korol I. A. Korzhavina A. Kotański U. Kötz H. Kowalski P. Kulinski O. Kuprash M. Kuze V. A. Kuzmin A. Lee B. B. Levchenko A. Levy V. Libov S. Limentani T. Y. Ling M. Lisovyi E. Lobodzinska W. Lohmann B. Löhr E. Lohrmann J. H. Loizides K. R. Long A. Longhin D. Lontkovskyi J. Łukasil O. Yu. Lukina P. Łużniak J. Maeda S. Magill I. Makarenko J. Malka R. Mankel A. Margotti G. Marini J. F. Mart Raymond and Beverly Sackler Faculty of Exact Sciences School of Physics Tel Aviv University Tel Aviv Israel Max Planck Institute Alexander Award Munich Germany Max-Planck-Institut für Physik München Germany Faculty of Physics and Applied Computer Science AGH-University of Science and Technology Cracow Poland Institute for Nuclear Studies Warsaw Poland University and INFN Bologna Bologna Italy INFN Bologna Bologna Italy Moscow Engineering Physics Institute Moscow Russia Università del Piemonte Orientale Novara and INFN Torino Italy Institute for Nuclear Research National Academy of Sciences and Kiev National University Kiev Ukraine Deutsches Elektronen-Synchrotron DESY Hamburg Germany Fakultät für Physik der Universität Freiburg i.Br. Freiburg i.Br. Germany Institute of Physics and Technology of Ministry of Education and Science of Kazakhstan Almaty Kazakhstan INFN Florence Florence Italy Departamento de Física Teórica Universidad Autónoma de Madrid Madrid Spain Physikalisches Institut der Universität Bonn Bonn Germany INFN Padova Padova Italy Department of Physics York University Ontario Canada Physics and Astronomy Department University College London London United Kingdom Department of Physics University of Wisconsin Madison USA Dipartimento di Fisica dell’ Università and INFN Padova Italy Physics Department Ohio State University Columbus USA Warsaw University Institute of Experimental Physics Warsaw Poland Department of Physics and Astronomy University of Glasgow Glasgow United Kingdom Calabria University Physics Department and INFN Cosenza Italy Argonne National Laboratory Argonne USA The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences Cracow Poland Łódź University Łódź Poland Department of Physics University of Oxford Oxford United Kingdom Department of Physics McGill University Montréal Canada Università di Torino and INFN Torino Italy Dipartimento di Fisica Università ’La Sapienza’ and INFN Rom

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Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at sNN=2.76 TeV with the ATLAS Detector at the LHC

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Physical Review Letters 2010年第25期105卷 252303-252303页

作者： G. Aad B. Abbott J. Abdallah A. A. Abdelalim A. Abdesselam O. Abdinov B. Abi M. Abolins H. Abramowicz H. Abreu E. Acerbi B. S. Acharya M. Ackers D. L. Adams T. N. Addy J. Adelman M. Aderholz S. Adomeit P. Adragna T. Adye S. Aefsky J. A. Aguilar-Saavedra M. Aharrouche S. P. Ahlen F. Ahles A. Ahmad M. Ahsan G. Aielli T. Akdogan T. P. A. Åkesson G. Akimoto A. V. Akimov M. S. Alam M. A. Alam S. Albrand M. Aleksa I. N. Aleksandrov M. Aleppo F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob M. Aliev G. Alimonti J. Alison M. Aliyev P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso J. Alonso M. G. Alviggi K. Amako P. Amaral C. Amelung V. V. Ammosov A. Amorim G. Amorós N. Amram C. Anastopoulos T. Andeen C. F. Anders K. J. Anderson A. Andreazza V. Andrei M-L. Andrieux X. S. Anduaga A. Angerami F. Anghinolfi N. Anjos A. Annovi A. Antonaki M. Antonelli S. Antonelli J. Antos F. Anulli S. Aoun L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce J. P. Archambault S. Arfaoui J-F. Arguin E. Arik M. Arik A. J. Armbruster K. E. Arms S. R. Armstrong O. Arnaez C. Arnault A. Artamonov G. Artoni D. Arutinov S. Asai J. Silva R. Asfandiyarov S. Ask B. Åsman L. Asquith K. Assamagan A. Astbury A. Astvatsatourov G. Atoian B. Aubert B. Auerbach E. Auge K. Augsten M. Aurousseau N. Austin R. Avramidou D. Axen C. Ay G. Azuelos Y. Azuma M. A. Baak G. Baccaglioni C. Bacci A. M. Bach H. Bachacou K. Bachas G. Bachy M. Backes E. Badescu P. Bagnaia S. Bahinipati Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker S Baker F. Baltasar Dos Santos Pedrosa E. Banas P. Banerjee Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov A. Barashkou A. Barbaro Galtieri T. Barber E. L. Barberio D. Barberis M. Barbero D. Y. Bardin T. Barillari M. Barisonzi T. Barklow N. Barlow B. M. Barnett R. M. Barnett A. Baroncelli A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa P. Barrillon R. Bartoldus A. E. Barton D. Bartsch R. L. Bates L. Batkova J. R. Batley A. Battaglia M. Albert-Ludwigs-Universität Fakultät für Mathematik und Physik Hermann-Herder Strasse 3 D-79104 Freiburg i.Br. Germany University of Oklahoma Homer L. Dodge Department of Physics and Astronomy 440 West Brooks Room 100 Norman Oklahoma 73019-0225 USA Institut de Física d’Altes Energies IFAE Edifici Cn Universitat Autònoma de Barcelona ES-08193 Bellaterra (Barcelona) Spain Université de Genève Section de Physique 24 rue Ernest Ansermet CH-1211 Geneve 4 Switzerland Oxford University Department of Physics Denys Wilkinson Building Keble Road Oxford OX1 3RH United Kingdom Institute of Physics Azerbaijan Academy of Sciences H. Javid Avenue 33 AZ 143 Baku Azerbaijan Oklahoma State University Department of Physics 145 Physical Sciences Building Stillwater Oklahoma 74078-3072 USA Michigan State University Department of Physics and Astronomy High Energy Physics Group East Lansing Michigan 48824-2320 USA Tel Aviv University Raymond and Beverly Sackler School of Physics and Astronomy Ramat Aviv IL - Tel Aviv 69978 Israel LAL Université Paris-Sud IN2P3/CNRS Orsay France INFN Sezione di Milano via Celoria 16 IT-20133 Milano Italy Università di Milano Dipartimento di Fisica via Celoria 16 IT-20133 Milano Italy INFN Gruppo Collegato di Udine Strada Costiera 11 IT-33100 Udine Italy ICTP Strada Costiera 11 IT-34014 Trieste Italy University of Bonn Physikalisches Institut Nussallee 12 D-53115 Bonn Germany Brookhaven National Laboratory Physics Department Building 510A Upton New York 11973 USA Hampton University Department of Physics Hampton Virginia 23668 USA Yale University Department of Physics P.O. Box 208121 New Haven Connecticut 06520-8121 USA Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) Föhringer Ring 6 80805 München Germany Ludwig-Maximilians-Universität München Fakultät für Physik Am Coulombwall 1 DE-85748 Garching Germany Queen Mary University of London Department of Physics Mile End Road London E1 4NS United Kingdom Ruther

By using the ATLAS detector, observations have been made of a centrality-dependent dijet asymmetry in the collisions of lead ions at the Large Hadron Collider. In a sample of lead-lead events with a per-nucleon center of mass energy of 2.76 TeV, selected with a minimum bias trigger, jets are reconstructed in fine-grained, longitudinally segmented electromagnetic and hadronic calorimeters. The transverse energies of dijets in opposite hemispheres are observed to become systematically more unbalanced with increasing event centrality leading to a large number of events which contain highly asymmetric dijets. This is the first observation of an enhancement of events with such large dijet asymmetries, not observed in proton-proton collisions, which may point to an interpretation in terms of strong jet energy loss in a hot, dense medium.

关键词： Energy dissipation

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ERRATUM: 'MULTI-WAVELENGTH OBSERVATIONS OF THE FLARING GAMMA-RAY BLAZAR 3C 66A IN 2008 OCTOBER' (2011, ApJ, 726, 43)

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The Astrophysical Journal 2011年第1期731卷

作者： A. A. Abdo M. Ackermann M. Ajello L. Baldini J. Ballet G. Barbiellini D. Bastieri K. Bechtol R. Bellazzini B. Berenji R. D. Blandford E. Bonamente A. W. Borgland A. Bouvier J. Bregeon A. Brez M. Brigida P. Bruel R. Buehler S. Buson G. A. Caliandro R. A. Cameron P. A. Caraveo S. Carrigan J. M. Casandjian E. Cavazzuti C. Cecchi Ö. Çelik E. Charles A. Chekhtman C. C. Cheung J. Chiang S. Ciprini R. Claus J. Cohen-Tanugi J. Conrad L. Costamante S. Cutini D. S. Davis C.D. Dermer F. de Palma S. W. Digel E. do Couto e Silva P. S. Drell R. Dubois D. Dumora C. Favuzzi S. J. Fegan P. Fortin M. Frailis L. Fuhrmann Y. Fukazawa S. Funk P. Fusco F. Gargano D. Gasparrini N. Gehrels S. Germani N. Giglietto P. Giommi F. Giordano M. Giroletti T. Glanzman G. Godfrey I. A. Grenier J. E. Grove L. Guillemot S. Guiriec D. Hadasch M. Hayashida E. Hays D. Horan R. E. Hughes R. Itoh G. Jóhannesson A. S. Johnson T. J. Johnson W.N. Johnson T. Kamae H. Katagiri J. Kataoka J. Knödlseder M. Kuss J. Lande L. Latronico S.-H. Lee F. Longo F. Loparco B. Lott M. N. Lovellette P. Lubrano A. Makeev M. N. Mazziotta J.E. McEnery J. Mehault P. F. Michelson T. Mizuno A. A. Moiseev C. Monte M. E. Monzani A. Morselli I. V. Moskalenko S. Murgia T. Nakamori M. Naumann-Godo I. Nestoras P. L. Nolan J.P. Norris E. Nuss T. Ohsugi A. Okumura N. Omodei E. Orlando J. F. Ormes M. Ozaki D. Paneque J.H. Panetta D. Parent V. Pelassa M. Pepe M. Pesce-Rollins F. Piron T. A. Porter S. Rainò R. Rando M. Razzano A. Reimer O. Reimer L. C. Reyes J. Ripken S. Ritz R. W. Romani M. Roth H. F.-W. Sadrozinski D. Sanchez A. Sander J. D. Scargle C. Sgrò M. S. Shaw P. D. Smith G. Spandre P. Spinelli M. S. Strickman D.J. Suson H. Takahashi T. Tanaka J. B. Thayer J. G. Thayer D. J. Thompson L. Tibaldo D. F. Torres G. Tosti A. Tramacere T. L. Usher J. Vandenbroucke V. Vasileiou N. Vilchez V. Vitale A. P. Waite P. Wang B. L. Winer K. S. Wood Z. Yang T. Ylinen M. Ziegler ((The Fermi-LAT Collaboration)) V. A. Acciari E. Aliu T. Arlen T. Aune M. Beilicke W. Benbow M. Böttcher D. Boltuch S.M. Space Science Division Naval Research Laboratory Washington DC 20375 USA National Research Council Research Associate National Academy of Sciences Washington DC 20001 USA W. W. Hansen Experimental Physics Laboratory Kavli Institute for Particle Astrophysics and Cosmology Department of Physics and SLAC National Accelerator Laboratory Stanford University Stanford CA 94305 USA Istituto Nazionale di Fisica Nucleare Sezione di Pisa I-56127 Pisa Italy Laboratoire AIM CEA-IRFU/CNRS/Université Paris Diderot Service d'Astrophysique CEA Saclay 91191 Gif sur Yvette France Istituto Nazionale di Fisica Nucleare Sezione di Trieste I-34127 Trieste Italy Dipartimento di Fisica Università di Trieste I-34127 Trieste Italy Istituto Nazionale di Fisica Nucleare Sezione di Padova I-35131 Padova Italy Dipartimento di Fisica 'G. Galilei ' Università di Padova I-35131 Padova Italy Istituto Nazionale di Fisica Nucleare Sezione di Perugia I-06123 Perugia Italy Dipartimento di Fisica Università degli Studi di Perugia I-06123 Perugia Italy Dipartimento di Fisica 'M. Merlin' dell'Università e del Politecnico di Bari I-70126 Bari Italy Istituto Nazionale di Fisica Nucleare Sezione di Bari 70126 Bari Italy Laboratoire Leprince-Ringuet École polytechnique CNRS/IN2P3 Palaiseau France Institut de Ciencies de l'Espai (IEEC-CSIC) Campus UAB 08193 Barcelona Spain INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica I-20133 Milano Italy Agenzia Spaziale Italiana (ASI) Science Data Center I-00044 Frascati (Roma) Italy NASA Goddard Space Flight Center Greenbelt MD 20771 USA Center for Research and Exploration in Space Science and Technology (CRESST) and NASA Goddard Space Flight Center Greenbelt MD 20771 USA Department of Physics and Center for Space Sciences and Technology University of Maryland Baltimore County Baltimore MD 21250 USA George Mason University Fairfax VA 22030 USA Laboratoire de Physique Théorique et Astroparticules Université Montpellier 2 CNRS/IN2P3 Montpellier

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Azimuthal Anisotropy of π0 Production in Au+Au Collisions at sNN=200 GeV: Path-Length Dependence of Jet Quenching and the Role of Initial Geometry

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Physical Review Letters 2010年第14期105卷 142301-142301页

作者： A. Adare S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba H. Al-Bataineh J. Alexander K. Aoki Y. Aramaki E. T. Atomssa R. Averbeck T. C. Awes B. Azmoun V. Babintsev M. Bai G. Baksay L. Baksay K. N. Barish B. Bassalleck A. T. Basye S. Bathe V. Baublis C. Baumann A. Bazilevsky S. Belikov R. Belmont R. Bennett A. Berdnikov Y. Berdnikov A. A. Bickley J. S. Bok K. Boyle M. L. Brooks H. Buesching V. Bumazhnov G. Bunce S. Butsyk C. M. Camacho S. Campbell C.-H. Chen C. Y. Chi M. Chiu I. J. Choi R. K. Choudhury P. Christiansen T. Chujo P. Chung O. Chvala V. Cianciolo Z. Citron B. A. Cole M. Connors P. Constantin M. Csanád T. Csörgő T. Dahms S. Dairaku I. Danchev K. Das A. Datta G. David A. Denisov A. Deshpande E. J. Desmond O. Dietzsch A. Dion M. Donadelli O. Drapier A. Drees K. A. Drees J. M. Durham A. Durum D. Dutta S. Edwards Y. V. Efremenko F. Ellinghaus T. Engelmore A. Enokizono H. En’yo S. Esumi B. Fadem D. E. Fields M. Finger, Jr. M. Finger F. Fleuret S. L. Fokin Z. Fraenkel J. E. Frantz A. Franz A. D. Frawley K. Fujiwara Y. Fukao T. Fusayasu I. Garishvili A. Glenn H. Gong M. Gonin Y. Goto R. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp T. Gunji H.-Å. Gustafsson J. S. Haggerty K. I. Hahn H. Hamagaki J. Hamblen J. Hanks R. Han E. P. Hartouni E. Haslum R. Hayano M. Heffner S. Hegyi T. K. Hemmick T. Hester X. He J. C. Hill M. Hohlmann W. Holzmann K. Homma B. Hong T. Horaguchi D. Hornback S. Huang T. Ichihara R. Ichimiya J. Ide Y. Ikeda K. Imai M. Inaba D. Isenhower M. Ishihara T. Isobe M. Issah A. Isupov D. Ivanischev B. V. Jacak J. Jia J. Jin B. M. Johnson K. S. Joo D. Jouan D. S. Jumper F. Kajihara S. Kametani N. Kamihara J. Kamin J. H. Kang J. Kapustinsky K. Karatsu D. Kawall M. Kawashima A. V. Kazantsev T. Kempel A. Khanzadeev K. M. Kijima B. I. Kim D. H. Kim D. J. Kim E. J. Kim E. Kim S. H. Kim Y. J. Kim E. Kinney K. Kiriluk Á. Kiss E. Kistenev L. Kochenda B. Komkov M. Konno J. Koster D. Kotchetkov A. Kozlov A. Král A. Kravitz G. J. Kunde K. Kurita M. Kurosawa Y. Kwon G. S. Kyle R. Lacey Y. S. Lai University of Colorado Boulder Colorado 80309 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Department of Physics University of Massachusetts Amherst Massachusetts 01003-9337 USA Chemistry Department Stony Brook University Stony Brook SUNY New York 11794-3400 USA RIKEN Nishina Center for Accelerator-Based Science Wako Saitama 351-0198 Japan RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA New Mexico State University Las Cruces New Mexico 88003 USA Kyoto University Kyoto 606-8502 Japan Center for Nuclear Study Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Physics Department Brookhaven National Laboratory Upton New York 11973-5000 USA IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino 142281 Russia Collider-Accelerator Department Brookhaven National Laboratory Upton New York 11973-5000 USA Florida Institute of Technology Melbourne Florida 32901 USA University of California—Riverside Riverside California 92521 USA University of New Mexico Albuquerque New Mexico 87131 USA Abilene Christian University Abilene Texas 79699 USA PNPI Petersburg Nuclear Physics Institute Gatchina Leningrad region 188300 Russia Institut fur Kernphysik University of Muenster D-48149 Muenster Germany Vanderbilt University Nashville Tennessee 37235 USA Saint Petersburg State Polytechnic University St. Petersburg Russia Yonsei University IPAP Seoul 120-749 Korea Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 USA Bhabha Atomic Research Cen

We have measured the azimuthal anisotropy of π0 production for 1<pT<18 GeV/c for Au+Au collisions at sNN=200 GeV. The observed anisotropy shows a gradual decrease for 3≲pT≲7–10 GeV/c, but remains positive b... 详细信息

We have measured the azimuthal anisotropy of π0 production for 1

关键词： Anisotropy

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Elliptic and Hexadecapole Flow of Charged Hadrons in Au+Au Collisions at sNN=200 GeV

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Physical Review Letters 2010年第6期105卷 062301-062301页

作者： A. Adare S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba H. Al-Bataineh J. Alexander K. Aoki Y. Aramaki E. T. Atomssa R. Averbeck T. C. Awes B. Azmoun V. Babintsev M. Bai G. Baksay L. Baksay K. N. Barish B. Bassalleck A. T. Basye S. Bathe V. Baublis C. Baumann A. Bazilevsky S. Belikov R. Belmont R. Bennett A. Berdnikov Y. Berdnikov A. A. Bickley J. S. Bok K. Boyle M. L. Brooks H. Buesching V. Bumazhnov G. Bunce S. Butsyk C. M. Camacho S. Campbell C.-H. Chen C. Y. Chi M. Chiu I. J. Choi R. K. Choudhury P. Christiansen T. Chujo P. Chung O. Chvala V. Cianciolo Z. Citron B. A. Cole M. Connors P. Constantin M. Csanád T. Csörgő T. Dahms S. Dairaku I. Danchev K. Das A. Datta G. David A. Denisov A. Deshpande E. J. Desmond O. Dietzsch A. Dion M. Donadelli O. Drapier A. Drees K. A. Drees J. M. Durham A. Durum D. Dutta S. Edwards Y. V. Efremenko F. Ellinghaus T. Engelmore A. Enokizono H. En’yo S. Esumi B. Fadem D. E. Fields M. Finger, Jr. M. Finger F. Fleuret S. L. Fokin Z. Fraenkel J. E. Frantz A. Franz A. D. Frawley K. Fujiwara Y. Fukao T. Fusayasu I. Garishvili A. Glenn H. Gong M. Gonin Y. Goto R. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp T. Gunji H.-Å. Gustafsson J. S. Haggerty K. I. Hahn H. Hamagaki J. Hamblen J. Hanks R. Han E. P. Hartouni E. Haslum R. Hayano M. Heffner S. Hegyi T. K. Hemmick T. Hester X. He J. C. Hill M. Hohlmann W. Holzmann K. Homma B. Hong T. Horaguchi D. Hornback S. Huang T. Ichihara R. Ichimiya J. Ide Y. Ikeda K. Imai M. Inaba D. Isenhower M. Ishihara T. Isobe M. Issah A. Isupov D. Ivanischev B. V. Jacak J. Jia J. Jin B. M. Johnson K. S. Joo D. Jouan D. S. Jumper F. Kajihara S. Kametani N. Kamihara J. Kamin J. H. Kang J. Kapustinsky K. Karatsu D. Kawall M. Kawashima A. V. Kazantsev T. Kempel A. Khanzadeev K. M. Kijima B. I. Kim D. H. Kim D. J. Kim E. J. Kim E. Kim S. H. Kim Y. J. Kim E. Kinney K. Kiriluk Á. Kiss E. Kistenev L. Kochenda B. Komkov M. Konno J. Koster D. Kotchetkov A. Kozlov A. Král A. Kravitz G. J. Kunde K. Kurita M. Kurosawa Y. Kwon G. S. Kyle R. Lacey Y. S. Lai University of Colorado Boulder Colorado 80309 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Department of Physics University of Massachusetts Amherst Massachusetts 01003-9337 USA Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA RIKEN Nishina Center for Accelerator-Based Science Wako Saitama 351-0198 JAPAN RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA New Mexico State University Las Cruces New Mexico 88003 USA Kyoto University Kyoto 606-8502 Japan Center for Nuclear Study Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France USA Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Physics Department Brookhaven National Laboratory Upton New York 11973-5000 USA IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino 142281 Russia Collider-Accelerator Department Brookhaven National Laboratory Upton New York 11973-5000 USA Florida Institute of Technology Melbourne Florida 32901 USA University of California - Riverside Riverside California 92521 USA University of New Mexico Albuquerque New Mexico 87131 USA Abilene Christian University Abilene Texas 79699 USA PNPI Petersburg Nuclear Physics Institute Gatchina Leningrad Region 188300 Russia Institut fur Kernphysik University of Muenster D-48149 Muenster Germany Vanderbilt University Nashville Tennessee 37235 USA Saint Petersburg State Polytechnic University St. Petersburg Russia Yonsei University IPAP Seoul 120-749 Korea Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 USA Bhabha Atomic Resea

Differential measurements of the elliptic (v2) and hexadecapole (v4) Fourier flow coefficients are reported for charged hadrons as a function of transverse momentum (pT) and collision centrality or number of participant nucleons (Npart) for Au+Au collisions at sNN=200 GeV. The v2,4 measurements at pseudorapidity |η|≤0.35, obtained with four separate reaction-plane detectors positioned in the range 1.0<|η|<3.9, show good agreement, indicating the absence of significant Δη-dependent nonflow correlations. Sizable values for v4(pT) are observed with a ratio v4(pT,Npart)/v22(pT,Npart)≈0.8 for 50≲Npart≲200, which is compatible with the combined effects of a finite viscosity and initial eccentricity fluctuations. For Npart≳200 this ratio increases up to 1.7 in the most central collisions.

关键词： Hadrons

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Transition in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions

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Physical Review Letters 2010年第25期104卷 252301-252301页

作者： A. Adare S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba H. Al-Bataineh J. Alexander K. Aoki L. Aphecetche Y. Aramaki J. Asai E. T. Atomssa R. Averbeck T. C. Awes B. Azmoun V. Babintsev M. Bai G. Baksay L. Baksay A. Baldisseri K. N. Barish P. D. Barnes B. Bassalleck A. T. Basye S. Bathe S. Batsouli V. Baublis C. Baumann A. Bazilevsky S. Belikov R. Belmont R. Bennett A. Berdnikov Y. Berdnikov A. A. Bickley J. G. Boissevain J. S. Bok H. Borel K. Boyle M. L. Brooks H. Buesching V. Bumazhnov G. Bunce S. Butsyk C. M. Camacho S. Campbell B. S. Chang W. C. Chang J.-L. Charvet C.-H. Chen S. Chernichenko C. Y. Chi M. Chiu I. J. Choi R. K. Choudhury P. Christiansen T. Chujo P. Chung A. Churyn O. Chvala V. Cianciolo Z. Citron B. A. Cole M. Connors P. Constantin M. Csanád T. Csörgő T. Dahms S. Dairaku I. Danchev K. Das A. Datta G. David A. Denisov D. d’Enterria A. Deshpande E. J. Desmond O. Dietzsch A. Dion M. Donadelli O. Drapier A. Drees K. A. Drees A. K. Dubey J. M. Durham A. Durum D. Dutta V. Dzhordzhadze S. Edwards Y. V. Efremenko F. Ellinghaus T. Engelmore A. Enokizono H. En’yo S. Esumi K. O. Eyser B. Fadem D. E. Fields M. Finger, Jr. M. Finger F. Fleuret S. L. Fokin Z. Fraenkel J. E. Frantz A. Franz A. D. Frawley K. Fujiwara Y. Fukao T. Fusayasu I. Garishvili A. Glenn H. Gong M. Gonin J. Gosset Y. Goto R. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp T. Gunji H.-Å. Gustafsson A. Hadj Henni J. S. Haggerty K. I. Hahn H. Hamagaki J. Hamblen J. Hanks R. Han E. P. Hartouni K. Haruna E. Haslum R. Hayano M. Heffner S. Hegyi T. K. Hemmick T. Hester X. He J. C. Hill M. Hohlmann W. Holzmann K. Homma B. Hong T. Horaguchi D. Hornback S. Huang T. Ichihara R. Ichimiya J. Ide H. Iinuma Y. Ikeda K. Imai J. Imrek M. Inaba D. Isenhower M. Ishihara T. Isobe M. Issah A. Isupov D. Ivanischev B. V. Jacak J. Jia J. Jin B. M. Johnson K. S. Joo D. Jouan D. S. Jumper F. Kajihara S. Kametani N. Kamihara J. Kamin J. H. Kang J. Kapustinsky D. Kawall M. Kawashima A. V. Kazantsev T. Kempel A. Khanzadeev K. M. Kijima J. Kikuchi B. I. University of Colorado Boulder Colorado 80309 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Department of Physics University of Massachusetts Amherst Massachusetts 01003-9337 USA Chemistry Department Stony Brook University Stony Brook SUNY New York 11794-3400 USA RIKEN Nishina Center for Accelerator-Based Science Wako Saitama 351-0198 Japan RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA New Mexico State University Las Cruces New Mexico 88003 USA Kyoto University Kyoto 606-8502 Japan SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) BP 20722 - 44307 Nantes France Center for Nuclear Study Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Physics Department Brookhaven National Laboratory Upton New York 11973-5000 USA IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino 142281 Russia Collider-Accelerator Department Brookhaven National Laboratory Upton New York 11973-5000 USA Florida Institute of Technology Melbourne Florida 32901 USA Dapnia CEA Saclay F-91191 Gif-sur-Yvette France University of California - Riverside Riverside California 92521 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA University of New Mexico Albuquerque New Mexico 87131 USA Abilene Christian University Abilene Texas 79699 USA PNPI Petersburg Nuclear Physics Institute Gatchina Leningrad region 188300 Russia Institut fur Kernphysik University of Muenster D-48149 Muenster Germany Vanderbilt University Nashville Tennessee 37235 USA Saint Petersburg State Polytechnic University St. Petersburg Russia Yonsei Universi

Hard-scattered parton probes produced in collisions of large nuclei indicate large partonic energy loss, possibly with collective produced-medium response to the lost energy. We present measurements of π0 trigger particles at transverse momenta pTt=4–12 GeV/c and associated charged hadrons (pTa=0.5–7 GeV/c) vs relative azimuthal angle Δϕ in Au+Au and p+p collisions at sNN=200 GeV. The Au+Au distribution at low pTa, whose shape has been interpreted as a medium effect, is modified for pTt<7 GeV/c. At higher pTt, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured pTa, which quantitatively challenges some medium response models. The associated yield of hadrons opposing the trigger particle in Au+Au relative to p+p (IAA) is suppressed at high pT (IAA≈0.35–0.5), but less than for inclusive suppression (RAA≈0.2).

关键词： Energy dissipation

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A novel quantum transition in a fully frustrated transverse Ising antiferromagnet

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Journal of physics: Conference Series 2009年第1期143卷

作者： Chandra, Anjan Kumar Inoue, Jun-Ichi Chakrabarti, Bikas K Centre for Applied Mathematics and Computational Science Saha Institute of Nuclear Physics Kolkata-700064 1/AF Bidhannagar India Complex Systems Engineering Graduate School of Information Science and Technology Hokkaido University Kita-ku Sapporo 060-0814 N14-W9 Japan Centre for Applied Mathematics and Computational Science Theoretical Condensed Matter Physics Division Saha Institute of Nuclear Physics Kolkata-700064 1/AF Bidhannagar India

We consider a long-range Ising antiferromagnet (LRIAF) put in a transverse field. Applying quantum Monte Carlo method, we study the variation of order parameter (spin correlation in Trotter time direction), susceptibility and average energy of the system for various values of the transverse field at different temperatures. The antiferromagnetic order is seen to get immediately broken as soon as the thermal or quantum fluctuations are added. We also discuss the phase diagram for the Sherrington-Kirkpatrick (SK) model with the same LRIAF bias, also in presence of a transverse field. We find that while the antiferromagnetic order is immediately broken as one adds an infinitesimal transverse field or thermal fluctuation to the system, an infinitesimal SK spin glass disorder is enough to induce a stable glass order in the antiferromagnet. This glass order eventually gets destroyed as the thermal or quantum fluctuations increased beyond their threshold values and the transition to para phase occurs. Indications of this novel phase transition are discussed. Because of the presence of full frustration, this surrogate property of the LRIAF for incubation of stable spin glass phase in it (induced by addition of a small disorder) should enable eventually the study of classical and quantum spin glass phases by using some perturbation theory with respect to the disorder. © 2009 IOP Publishing Ltd.

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Verification and validation of ACE-format library created from ENDF/B-VII.0

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Yuanzineng Kexue Jishu/Atomic Energy science and Technology 2009年第9期43卷 834-838页

作者： Chen, Chao-Bin Chen, Yi-Xue Hu, Ze-Hua Wu, Jun Zhang, Ben-Ai Institute of Applied Physics and Calculational Mathematics Beijing 100088 China Nuclear Science and Engineering School North China Electric Power University Beijing 102206 China

ENDF/B-VII.0, released by the USA Cross Section Evaluation Working Group (CSEWG) in December 2006, was developed in five years since the previous release of ENDF/B-VI.8 and was demonstrated to contain much better physical representations of the data and to perform much better than previus ENDF evaluations over a broad range of applications. We generated ACE-format pointwise cross section library from the ENDF/B-VII.0 neutron reaction sublibrary with the processing code NJOY. The paper provides an overview of ENDF/B-VII.0, a summary of the ACE-format files producing process and a detail description of the validation of the ACE-format library. The conclusion is that the ACE-format library produced is correct.

关键词： nuclear energy

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