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Search for a Light Sterile Neutrino at Daya Bay

Physical Review Letters 2014年第14期113卷 141802-141802页

作者： F. P. An A. B. Balantekin H. R. Band W. Beriguete M. Bishai S. Blyth I. Butorov G. F. Cao J. Cao Y. L. Chan J. F. Chang L. C. Chang Y. Chang C. Chasman H. Chen Q. Y. Chen S. M. Chen X. Chen Y. X. Chen Y. Chen Y. P. Cheng J. J. Cherwinka M. C. Chu J. P. Cummings J. de Arcos Z. Y. Deng Y. Y. Ding M. V. Diwan E. Draeger X. F. Du D. A. Dwyer W. R. Edwards S. R. Ely J. Y. Fu L. Q. Ge R. Gill M. Gonchar G. H. Gong H. Gong M. Grassi W. Q. Gu M. Y. Guan X. H. Guo R. W. Hackenburg G. H. Han S. Hans M. He K. M. Heeger Y. K. Heng P. Hinrichs Y. K. Hor Y. B. Hsiung B. Z. Hu L. M. Hu L. J. Hu T. Hu W. Hu E. C. Huang H. Huang X. T. Huang P. Huber G. Hussain Z. Isvan D. E. Jaffe P. Jaffke K. L. Jen S. Jetter X. P. Ji X. L. Ji H. J. Jiang J. B. Jiao R. A. Johnson L. Kang S. H. Kettell M. Kramer K. K. Kwan M. W. Kwok T. Kwok W. C. Lai K. Lau L. Lebanowski J. Lee R. T. Lei R. Leitner A. Leung J. K. C. Leung C. A. Lewis D. J. Li F. Li G. S. Li Q. J. Li W. D. Li X. N. Li X. Q. Li Y. F. Li Z. B. Li H. Liang C. J. Lin G. L. Lin P. Y. Lin S. K. Lin Y. C. Lin J. J. Ling J. M. Link L. Littenberg B. R. Littlejohn D. W. Liu H. Liu J. L. Liu J. C. Liu S. S. Liu Y. B. Liu C. Lu H. Q. Lu K. B. Luk Q. M. Ma X. Y. Ma X. B. Ma Y. Q. Ma K. T. McDonald M. C. McFarlane R. D. McKeown Y. Meng I. Mitchell J. Monari Kebwaro Y. Nakajima J. Napolitano D. Naumov E. Naumova I. Nemchenok H. Y. Ngai Z. Ning J. P. Ochoa-Ricoux A. Olshevski S. Patton V. Pec J. C. Peng L. E. Piilonen L. Pinsky C. S. J. Pun F. Z. Qi M. Qi X. Qian N. Raper B. Ren J. Ren R. Rosero B. Roskovec X. C. Ruan B. B. Shao H. Steiner G. X. Sun J. L. Sun Y. H. Tam X. Tang H. Themann K. V. Tsang R. H. M. Tsang C. E. Tull Y. C. Tung B. Viren V. Vorobel C. H. Wang L. S. Wang L. Y. Wang M. Wang N. Y. Wang R. G. Wang W. Wang W. W. Wang X. Wang Y. F. Wang Z. Wang Z. M. Wang D. M. Webber H. Y. Wei Y. D. Wei L. J. Wen K. Whisnant C. G. White L. Whitehead T. Wise H. L. H. Wong S. C. F. Wong E. Worcester Q. Wu D. M. Xia J. K. Xia X. Xia Z. Z. Xing J. Y. Xu J. L. Xu J. Xu Y. Xu T. Xue J. Yan C. C. Yan Institute of Modern Physics East China University of Science and Technology Shanghai University of Wisconsin Madison Wisconsin USA Brookhaven National Laboratory Upton New York USA Department of Physics National Taiwan University Taipei Joint Institute for Nuclear Research Dubna Moscow Region Institute of High Energy Physics Beijing Chinese University of Hong Kong Hong Kong Institute of Physics National Chiao-Tung University Hsinchu National United University Miao-Li Shandong University Jinan Department of Engineering Physics Tsinghua University Beijing North China Electric Power University Beijing Shenzhen University Shenzhen Siena College Loudonville New York USA Department of Physics Illinois Institute of Technology Chicago Illinois USA Lawrence Berkeley National Laboratory Berkeley California USA Department of Physics University of Illinois at Urbana-Champaign Urbana Illinois USA Chengdu University of Technology Chengdu Shanghai Jiao Tong University Shanghai Beijing Normal University Beijing College of William and Mary Williamsburg Virginia USA Department of Physics Yale University New Haven Connecticut USA Center for Neutrino Physics Virginia Tech Blacksburg Virginia USA China Institute of Atomic Energy Beijing School of Physics Nankai University Tianjin Department of Physics University of Cincinnati Cincinnati Ohio USA Dongguan University of Technology Dongguan Department of Physics University of California Berkeley California USA Department of Physics The University of Hong Kong Pokfulam Hong Kong Department of Physics University of Houston Houston Texas USA Charles University Faculty of Mathematics and Physics Prague University of Science and Technology of China Hefei Sun Yat-Sen (Zhongshan) University Guangzhou Joseph Henry Laboratories Princeton University Princeton New Jersey USA California Institute of Technology Pasadena California USA Xi’an Jiaotong University Xi’an Department of Physics College of Science and Technolo

A search for light sterile neutrino mixing was performed with the first 217 days of data from the Daya Bay Reactor Antineutrino Experiment. The experiment’s unique configuration of multiple baselines from six 2.9 GWth nuclear reactors to six antineutrino detectors deployed in two near (effective baselines 512 m and 561 m) and one far (1579 m) underground experimental halls makes it possible to test for oscillations to a fourth (sterile) neutrino in the 10−3 eV2<|Δm412|<0.3 eV2 range. The relative spectral distortion due to the disappearance of electron antineutrinos was found to be consistent with that of the three-flavor oscillation model. The derived limits on sin22θ14 cover the 10−3 eV2≲|Δm412|≲0.1 eV2 region, which was largely unexplored.

关键词： STERILE neutrinos OSCILLATIONS QUANTUM mechanics HYPOTHETICAL particles

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Erratum: Measurement of D*± production in deep inelastic scattering at HERA

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Journal of High Energy physics 2014年第2期2014卷 1-9页

作者： Abramowicz, H. Abt, I. Adamczyk, L. Adamus, M. Aggarwal, R. Antonelli, S. Antonioli, P. Antonov, A. Arneodo, M. Arslan, O. Aushev, V. Aushev, Y. Bachynska, O. Bamberger, A. Barakbaev, A. N. Barbagli, G. Bari, G. Barreiro, F. Bartosik, N. Bartsch, D. Basile, M. Behnke, O. Behr, J. Behrens, U. Bellagamba, L. Bertolin, A. Bhadra, S. Bindi, M. Blohm, C. Bokhonov, V. Bold, T. Boos, E. G. Borras, K. Boscherini, D. Bot, D. Brock, I. Brownson, E. Brugnera, R. Brümmer, N. Bruni, A. Bruni, G. Brzozowska, B. Bussey, P. J. Bylsma, B. Caldwell, A. Capua, M. Carlin, R. Catterall, C. D. Chekanov, S. Chwastowski, J. Ciborowski, J. Ciesielski, R. Cifarelli, L. Cindolo, F. Contin, A. Cooper-Sarkar, A. M. Coppola, N. Corradi, M. Corriveau, F. Costa, M. D’Agostini, G. Corso, F. Dal del Peso, J. Dementiev, R. K. De Pasquale, S. Derrick, M. Devenish, R. C. E. Dobur, D. Dolgoshein, B. A. Dolinska, G. Doyle, A. T. Drugakov, V. Durkin, L. S. Dusini, S. Eisenberg, Y. Ermolov, P. F. Eskreys, A. Fang, S. Fazio, S. Ferrando, J. Ferrero, M. I. Figiel, J. Foster, B. Gach, G. Galas, A. Gallo, E. Garfagnini, A. Geiser, A. Gialas, I. Gizhko, A. Gladilin, L. K. Gladkov, D. Glasman, C. Gogota, O. Golubkov, Yu. A. Göttlicher, P. Grabowska-Bold, I. Grebenyuk, J. Gregor, I. Grigorescu, G. Grzelak, G. Gueta, O. Guzik, M. Gwenlan, C. Haas, T. Hain, W. Hamatsu, R. Hart, J. C. Hartmann, H. Hartner, G. Hilger, E. Hochman, D. Hori, R. Hüttmann, A. Ibrahim, Z. A. Iga, Y. Ingbir, R. Ishitsuka, M. Iudin, A. Jakob, H.-P. Januschek, F. Jones, T. W. Jüngst, M. Kadenko, I. Kahle, B. Kananov, S. Kanno, T. Karshon, U. Karstens, F. Katkov, I. I. Kaur, M. Kaur, P. Keramidas, A. Khein, L. A. Kim, J. Y. Kisielewska, D. Kitamura, S. Klanner, R. Klein, U. Koffeman, E. Kondrashova, N. Kononenko, O. Kooijman, P. Korol, Ie. Korzhavina, I. A. Kotanski, A. Kötz, U. Kovalchuk, N. Kowalski, H. Kuprash, O. Kuze, M. Lee, A. Levchenko, B. B. Levy, A. Libov, V. Limentani, S. Ling, T. Y. Lisovyi, M. Lobodzinska, E. Lohmann, W. Löhr, B. Lohrmann, E. Long, K. R. Longhin, A. Lontkovskyi Raymond and Beverly Sackler Faculty of Exact Sciences School of Physics Tel Aviv University Tel Aviv Israel Max-Planck-Institut für Physik München Germany AGH-University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland National Centre for Nuclear Research Warsaw Poland Panjab University Department of Physics Chandigarh India University and INFN Bologna Bologna Italy INFN Bologna Bologna Italy Moscow Engineering Physics Institute Moscow Russia Università di Torino and INFN Torino Italy Physikalisches Institut der Universität Bonn Bonn Germany Institute for Nuclear Research National Academy of Sciences Kyiv Ukraine Department of Nuclear Physics National Taras Shevchenko University of Kyiv Kyiv 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 INFN Padova Padova Italy Department of Physics York University Ontario Canada Department of Physics University of Wisconsin Madison USA Dipartimento di Fisica dell’ Università and INFN Padova Italy Physics Department Ohio State University Columbus USA Faculty of Physics University of Warsaw Warsaw Poland School 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 Krakow Poland Cracow University of Technology Faculty of Physics Mathematics and Applied Computer Science Cracow Poland Lódz University Lódz Poland University of Liverpool Liverpool United Kingdom Department of Physics University of Oxford Oxford United Kingdom Department of Physics McGill University Montréal Cana

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11th German Conference on Chemoinformatics (GCC 2015) Abstracts

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JOURNAL OF CHEMINFORMATICS 2016年第SUPPL 1期8卷 1-27页

作者： [Anonymous] GDCh-CIC Division Associated Board Member Beilstein-Institut zur Förderung der Chemischen Wissenschaften Trakehner Str. 7-9 60487 Frankfurt Germany. ufechner@beilstein-institut.de. Division Medicinal Chemistry Amsterdam Institute for Molecules Medicines and Systems (AIMMS) VU University Amsterdam The Netherlands. Centre for Bioinformatics Uni Hamburg Bundesstr. 43 20146 Hamburg Germany. Sanofi-Aventis Deutschland GmbH 65926 Frankfurt am Main Germany. stefan.guessregen@***. Sanofi-Aventis Deutschland GmbH 65926 Frankfurt am Main Germany. GlaxoSmithKline Stevenage SG1 2NY UK. nicola.j.richmond@***. Discngine Paris 75011 France. Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Germany. marwin.segler@wwu.de. Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Germany. Bundeskriminalamt Wiesbaden Central Analytics II 65173 Wiesbaden Germany. Department of Chemistry and Biochemistry University of California Santa Barbara CA 93111 USA. shea@chem.ucsb.edu. Department of Chemistry and Biochemistry University of California Santa Barbara CA 93111 USA. Chemistry Department Ludwig-Maximilians-Universität München Butenandtstr. 7 81377 Munich Germany. Inorganic Chemistry and Center for Nanointegration University of Duisburg-Essen Essen Germany. CAM-D Technologies Essen Germany. Institute for Bioinformatics and Chemoinformatics Westphalian University of Applied Sciences Recklinghausen Germany. Institute for Bioinformatics and Chemoinformatics Westphalian University of Applied Sciences Recklinghausen Germany. achim.zielesny@w-hs.de. Leiden University Leiden Netherlands. j.fraaije@chem.leidenuniv.nl. Culgi BV Berlin Germany. Physikalische Chemie III TU Dortmund 44227 Dortmund Germany. stefan.kast@tu-dortmund.de. Centre for Molecular Informatics Department of Chemistry University of Cambridge Lensfield Road Cambridge CB2 1EW United Kingdom. kcb27@cam.ac.uk. Centre for Molecular Informatics Department of Chemistry

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Erratum to: Methods for evaluating medical tests and biomarkers

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Diagnostic and prognostic research 2017年第1期1卷 11页

作者： Gowri Gopalakrishna Miranda Langendam Rob Scholten Patrick Bossuyt Mariska Leeflang Anna Noel-Storr James Thomas Iain Marshall Byron Wallace Penny Whiting Clare Davenport Gowri GopalaKrishna Isabel de Salis Sue Mallett Robert Wolff Richard Riley Marie Westwood Jos Kleinen Gary Collins Hans Reitsma Karel Moons Antonia Zapf Annika Hoyer Katharina Kramer Oliver Kuss J Ensor J J Deeks E C Martin R D Riley Gerta Rücker Susanne Steinhauser Martin Schumacher Joie Ensor Kym Snell Brian Willis Thomas Debray Jon Deeks Lavinia Ferrante di Ruffano Sian Taylor-Phillips Chris Hyde Stuart A Taylor Gauraang Batnagar Lavinia Ferrante Di Ruffano Farah Seedat Aileen Clarke Sarah Byron Frances Nixon Rebecca Albrow Thomas Walker Carla Deakin Zhivko Zhelev Harriet Hunt Yaling Yang Lucy Abel James Buchanan Thomas Fanshawe Bethany Shinkins Laure Wynants Jan Verbakel Sabine Van Huffel Dirk Timmerman Ben Van Calster Aeliko Zwinderman Jason Oke Jack O'Sullivan Rafael Perera Brian Nicholson Hannah L Bromley Tracy E Roberts Adele Francis Denniis Petrie G Bruce Mann Kinga Malottki Holly Smith Lucinda Billingham Alice Sitch Oke Gerke Mie Holm-Vilstrup Eivind Antonsen Segtnan Ulrich Halekoh Poul Flemming Høilund-Carlsen Bernard G Francq Jac Dinnes Julie Parkes Walter Gregory Jenny Hewison Doug Altman William Rosenberg Peter Selby Julien Asselineau Paul Perez Aïssatou Paye Emilie Bessede Cécile Proust-Lima Christiana Naaktgeboren Joris de Groot Anne Rutjes Johannes Reitsma Emmanuel Ogundimu Jonathan Cook Yannick Le Manach Yvonne Vergouwe Romin Pajouheshnia Rolf Groenwold Karen Moons Linda Peelen Daan Nieboer Bavo De Cock Micael J Pencina Ewout W Steyerberg Jennifer Cooper Nick Parsons Chris Stinton Steve Smith Andy Dickens Rachel Jordan Alexandra Enocson David Fitzmaurice Peymane Adab Charles Boachie Gaj Vidmar Karoline Freeman Martin Connock Rachel Court Carl Moons Jessica Harris Andrew Mumford Zoe Plummer Kurtis Lee Barnaby Reeves Chris Rogers Veerle Verheyden Gianni D Angelini Gavin J Murphy Jeremy Huddy Melody Ni Katherine Good Graham Cooke 1Department of Clinical Epidemiology Biostatistics & Bioinformatics Academic Medical Center University of Amsterdam Amsterdam The Netherlands. 2Cochrane Netherlands Julius Center for Health Sciences and Primary Care University Medical Center Utrecht Utrecht Netherlands. 234Department of Clinical Epidemiology Biostatistics & Bioinformatics Academic Medical Center University of Amsterdam Amsterdam The Netherlands. 49Department of Clinical Epidemiology Biostatistics & Bioinformatics Academic Medical Center University of Amsterdam Amsterdam The Netherlands. 3Cochrane Dementia and Cognitive Improvement Group University of Oxford Oxford UK. 4EPPI-Centre Department of Social Science University College London London UK. 5Division of Health and Social Care Research King's College London London UK. 6College of Computer and Information Science Northeastern University Boston USA. 13University Hospitals Bristol NHS Foundation Trust School of Social and Community Medicine Bristol UK. 275Institute of Applied Health Research University of Birmingham Birmingham UK. 9Department of Clinical Epidemiology Biostatistics & Bioinformatics Academic Medical Center University of Amsterdam Amsterdam The Netherlands. 10School of Social and Community Medicine University of Bristol Bristol UK. 179Institute of Applied Health Research University of Birmingham Birmingham UK. 12Kleijnen Systematic Reviews Ltd York UK. 25Research Institute for Primary Care and Health Sciences Keele University Keele UK. 188Centre for Statistics in Medicine Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences University of Oxford Oxford UK. 191Julius Center for Health Sciences and Primary Care University Medical Center Utrecht 3584 CG Utrecht Netherlands. 237Julius Center for Health Sciences and Primary Care University Medical Center Utrecht 3584 CG Utrecht Netherlands. 18Department of Medical Statistics University Medical Center Göttingen Göttingen Germany. 19Institute for B

[This corrects the article DOI: 10.1186/s41512-016-0001-y.].

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Measurement of CP Violation in the Phase Space of B±→K+K−π± and B±→π+π−π± Decays

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Physical Review Letters 2014年第1期112卷 011801-011801页

作者： R. Aaij B. Adeva M. Adinolfi C. Adrover A. Affolder Z. Ajaltouni J. Albrecht F. Alessio M. Alexander S. Ali G. Alkhazov P. Alvarez Cartelle A. A. Alves Jr. S. Amato S. Amerio Y. Amhis L. Anderlini J. Anderson R. Andreassen J. E. Andrews R. B. Appleby O. Aquines Gutierrez F. Archilli A. Artamonov M. Artuso E. Aslanides G. Auriemma M. Baalouch S. Bachmann J. J. Back A. Badalov C. Baesso V. Balagura W. Baldini R. J. Barlow C. Barschel S. Barsuk W. Barter Th. Bauer A. Bay J. Beddow F. Bedeschi I. Bediaga S. Belogurov K. Belous I. Belyaev E. Ben-Haim G. Bencivenni S. Benson J. Benton A. Berezhnoy R. Bernet M.-O. Bettler M. van Beuzekom A. Bien S. Bifani T. Bird A. Bizzeti P.M. Bjørnstad T. Blake F. Blanc J. Blouw S. Blusk V. Bocci A. Bondar N. Bondar W. Bonivento S. Borghi A. Borgia T. J. V. Bowcock E. Bowen C. Bozzi T. Brambach J. van den Brand J. Bressieux D. Brett M. Britsch T. Britton N. H. Brook H. Brown A. Bursche G. Busetto J. Buytaert S. Cadeddu O. Callot M. Calvi M. Calvo Gomez A. Camboni P. Campana D. Campora Perez A. Carbone G. Carboni R. Cardinale A. Cardini H. Carranza-Mejia L. Carson K. Carvalho Akiba G. Casse L. Castillo Garcia M. Cattaneo Ch. Cauet R. Cenci M. Charles Ph. Charpentier S.-F. Cheung N. Chiapolini M. Chrzaszcz K. Ciba X. Cid Vidal G. Ciezarek P. E. L. Clarke M. Clemencic H. V. Cliff J. Closier C. Coca V. Coco J. Cogan E. Cogneras P. Collins A. Comerma-Montells A. Contu A. Cook M. Coombes S. Coquereau G. Corti B. Couturier G. A. Cowan D. C. Craik M. Cruz Torres S. Cunliffe R. Currie C. D’Ambrosio P. David P. N. Y. David A. Davis I. De Bonis K. De Bruyn S. De Capua M. De Cian J. M. De Miranda L. De Paula W. De Silva P. De Simone D. Decamp M. Deckenhoff L. Del Buono N. Déléage D. Derkach O. Deschamps F. Dettori A. Di Canto H. Dijkstra M. Dogaru S. Donleavy F. Dordei A. Dosil Suárez D. Dossett A. Dovbnya F. Dupertuis P. Durante R. Dzhelyadin A. Dziurda A. Dzyuba S. Easo U. Egede V. Egorychev S. Eidelman D. van Eijk S. Eisenhardt U. Eitschberger R. Ekelhof L. Eklund I. El Rifai Ch. Elsasser A. Nikhef National Institute for Subatomic Physics Amsterdam Netherlands Universidad de Santiago de Compostela Santiago de Compostela Spain H.H. Wills Physics Laboratory University of Bristol Bristol United Kingdom CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Clermont Université Université Blaise Pascal CNRS/IN2P3 LPC Clermont-Ferrand France Fakultät Physik Technische Universität Dortmund Dortmund Germany European Organization for Nuclear Redfsearch (CERN) Geneva Switzerland School of Physics and Astronomy University of Glasgow Glasgow United Kingdom Petersburg Nuclear Physics Institute (PNPI) Gatchina Russia Sezione INFN di Roma La Sapienza Roma Italy Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Sezione INFN di Padova Padova Italy LAL Université Paris-Sud CNRS/IN2P3 Orsay France Sezione INFN di Firenze Firenze Italy Physik-Institut Universität Zürich Zürich Switzerland University of Cincinnati Cincinnati Ohio USA University of Maryland College Park Maryland USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Max-Planck-Institutfür Kernphysik (MPIK) Heidelberg Germany Laboratori Nazionali dell’INFN di Frascati Frascati Italy Institute for High Energy Physics (IHEP) Protvino Russia Syracuse University Syracuse New York USA Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Department of Physics University of Warwick Coventry United Kingdom Universitat de Barcelona Barcelona Spain Institute of Theoretical and Experimental Physics (ITEP) Moscow Russia Sezione INFN di Ferrara Ferrara Italy Cavendish Laboratory University of Cambridge Cambridge United Kingdom Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland Sezione INFN di Pisa Pisa Italy Centro Brasileiro de Pesquisas Físicas (CBPF) Rio de Janeiro Brazil LPNHE Université Pierre et Marie Curie Uni

The charmless decays B±→K+K−π± and B±→π+π−π± are reconstructed in a data set of pp collisions with an integrated luminosity of 1.0 fb−1 and center-of-mass energy of 7 TeV, collected by LHCb in 2011. The inclusive charge asymmetries of these modes are measured to be ACP(B±→K+K−π±)=−0.141±0.040 (stat)±0.018 (syst)±0.007(J/ψ K±) and ACP(B±→π+π−π±)=0.117±0.021 (stat)±0.009 (syst)±0.007(J/ψ K±), where the third uncertainty is due to the CP asymmetry of the B±→J/ψK± reference mode. In addition to the inclusive CP asymmetries, larger asymmetries are observed in localized regions of phase space.

关键词： CP violation (nuclear physics) PROTON-proton interactions LUMINOSITY CENTER of mass UNCERTAINTY (Information theory) PHASE space (Statistical physics)

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Application of TDGL Model to B2 Type Ordering with Two Step Phase Separation in Fe-Ni-Al Alloys

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MRS Online Proceedings Library (OPL) 2013年第1期1535卷 mmm12-a-0255-mmm12-a-0255页

作者： Ryuichiro Oguma Syo Matsumura Minoru Doi Satoshi Hata Keisuke Ogata Department of Applied Physics. Fukuoka University Fukuoka 814-0180 Japan Department of Applied Quantum Physics and Nuclear Engineering Kyushu University Fukuoka 819-0395 Japan Department of Mechanical Engineering Aichi Institute of Technology Toyota 470-0392 Japan Department of Electrical and Material Science Kyushu University Kasuga 816-8580 Japan Interdisciplinary Graduate School of Engineering Science Kyushu University Kasuga 816-8580 Japan

Formation of domain structures in two-step phase separation in Fe-based Fe-Ni-Al alloys are investigated by applying a time-dependent Ginzburg-Landau (TDGL) model. The present authors recently developed a TDGL formulation for ordering processes of B2 and D03 in binary alloys, taking into account the symmetrical relationships between these ordered phases. In this formulation, multiple types of variants of the structures are represented by three order parameters which can be measured independently through crystal structure factors. Mean-field free energies are defined in a form of Landau type expansion with the order parameters and a composition parameter. Interfacial energies due to local variations of degrees of order and composition are given in a gradient square approximation. Kinetic equations for time-evolution of the order parameters and the composition one are derived from the Ginzburg-Landau type potential consisting of the mean-field free energies and the interfacial energy terms. On the other hand, coauthors have investigated domain structures in two-step phase separation of Fe-based Fe-Ni-Al alloys. The evolution of three-dimensional domain structures and composition profiles has been analyzed by electron tomography imaging and energy-dispersive X-ray spectroscopy. In this work the authors performed three-dimensional numerical simulations assuming the thermal processing. The results of the simulations well reproduced the characteristics of the micro-structures obtained from the observations.

关键词： phase transformation metal diffusion

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Simulations of structure formation in B2 type ordering with two step phase separation in Fe-Ni-Al alloys

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AIP Conference Proceedings 2013年第1期1518卷 703-709页

The present authors recently developed a time-dependent Ginzburg-Landau (TDGL) formulation for ordering processes of B2 and D03 in binary alloys, taking into account the symmetrical relationships between these ordered phases. In this formulation, mean-field free energies are defined in a form of Landau type expansion with order parameters and a composition parameter. Interfacial energies due to local variations of degrees of order and composition are given in a gradient square approximation. Kinetic equations for time-evolution of the order parameters and the composition one are derived from the Ginzburg-Landau type potential consisting of the mean-field free energies and the interfacial energy terms. On the other hand, coauthors have investigated domain structures in two-step phase separation of Fe-based Fe-Ni-Al alloys. Micro-structures in the super alloys consist of B2 ordered domains and A2 disordered matrices in the first stage of phase separation. The second stage during a subsequent aging leads to formation of B2 domains and A2 phase regions in the former A2 matrices and B2 domains, respectively. The evolution of three-dimensional domain structures and composition profiles has been analyzed by electron tomography imaging and energy-dispersive X-ray spectroscopy. In this work the authors have applied the TDGL formulation to this alloy system, and performed three-dimensional numerical simulations assuming the thermal processing. The results of the simulations well reproduced the characteristics of the micro-structures obtained from the observations.

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Search for Majorana Neutrinos in B−→π+μ−μ− Decays

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Physical Review Letters 2014年第13期112卷 131802-131802页

作者： R. Aaij B. Adeva M. Adinolfi A. Affolder Z. Ajaltouni J. Albrecht F. Alessio M. Alexander S. Ali G. Alkhazov P. Alvarez Cartelle A. A. Alves, Jr. S. Amato S. Amerio Y. Amhis L. Anderlini J. Anderson R. Andreassen M. Andreotti J. E. Andrews R. B. Appleby O. Aquines Gutierrez F. Archilli A. Artamonov M. Artuso E. Aslanides G. Auriemma M. Baalouch S. Bachmann J. J. Back A. Badalov V. Balagura W. Baldini R. J. Barlow C. Barschel S. Barsuk W. Barter V. Batozskaya Th. Bauer A. Bay J. Beddow F. Bedeschi I. Bediaga S. Belogurov K. Belous I. Belyaev E. Ben-Haim G. Bencivenni S. Benson J. Benton A. Berezhnoy R. Bernet M.-O. Bettler M. van Beuzekom A. Bien S. Bifani T. Bird A. Bizzeti P. M. Bjørnstad T. Blake F. Blanc J. Blouw S. Blusk V. Bocci A. Bondar N. Bondar W. Bonivento S. Borghi A. Borgia M. Borsato T. J. V. Bowcock E. Bowen C. Bozzi T. Brambach J. van den Brand J. Bressieux D. Brett M. Britsch T. Britton N. H. Brook H. Brown A. Bursche G. Busetto J. Buytaert S. Cadeddu R. Calabrese O. Callot M. Calvi M. Calvo Gomez A. Camboni P. Campana D. Campora Perez A. Carbone G. Carboni R. Cardinale A. Cardini H. Carranza-Mejia L. Carson K. Carvalho Akiba G. Casse L. Castillo Garcia M. Cattaneo Ch. Cauet R. Cenci M. Charles Ph. Charpentier S.-F. Cheung N. Chiapolini M. Chrzaszcz K. Ciba X. Cid Vidal G. Ciezarek P. E. L. Clarke M. Clemencic H. V. Cliff J. Closier C. Coca V. Coco J. Cogan E. Cogneras P. Collins A. Comerma-Montells A. Contu A. Cook M. Coombes S. Coquereau G. Corti I. Counts B. Couturier G. A. Cowan D. C. Craik M. Cruz Torres S. Cunliffe R. Currie C. D’Ambrosio J. Dalseno P. David P. N. Y. David A. Davis I. De Bonis K. De Bruyn S. De Capua M. De Cian J. M. De Miranda L. De Paula W. De Silva P. De Simone D. Decamp M. Deckenhoff L. Del Buono N. Déléage D. Derkach O. Deschamps F. Dettori A. Di Canto H. Dijkstra S. Donleavy F. Dordei M. Dorigo P. Dorosz A. Dosil Suárez D. Dossett A. Dovbnya F. Dupertuis P. Durante R. Dzhelyadin A. Dziurda A. Dzyuba S. Easo U. Egede V. Egorychev S. Eidelman S. Eisenhardt U. Eitschberge Nikhef National Institute for Subatomic Physics Amsterdam The Netherlands Universidad de Santiago de Compostela Santiago de Compostela Spain H.H. Wills Physics Laboratory University of Bristol Bristol United Kingdom Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Clermont Université Université Blaise Pascal CNRS/IN2P3 LPC Clermont-Ferrand France Fakultät Physik Technische Universität Dortmund Dortmund Germany European Organization for Nuclear Research (CERN) Geneva Switzerland School of Physics and Astronomy University of Glasgow Glasgow United Kingdom Petersburg Nuclear Physics Institute (PNPI) Gatchina Russia Sezione INFN di Roma La Sapienza Roma Italy Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Sezione INFN di Padova Padova Italy LAL Université Paris-Sud CNRS/IN2P3 Orsay France Sezione INFN di Firenze Firenze Italy Physik-Institut Universität Zürich Zürich Switzerland University of Cincinnati Cincinnati Ohio USA Sezione INFN di Ferrara Ferrara Italy University of Maryland College Park Maryland USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Max-Planck-Institut für Kernphysik (MPIK) Heidelberg Germany Institute for High Energy Physics (IHEP) Protvino Russia Syracuse University Syracuse New York USA CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Department of Physics University of Warwick Coventry United Kingdom Universitat de Barcelona Barcelona Spain Institute of Theoretical and Experimental Physics (ITEP) Moscow Russia Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland Cavendish Laboratory University of Cambridge Cambridge United Kingdom National Center for Nuclear Research (NCBJ) Warsaw Poland Sezione INFN di Pisa Pisa Italy Centro Brasileiro de Pesquisas Físicas (CBPF) Rio de Janeiro Brazil LPNHE Université Pierre et Marie Curie

A search for heavy Majorana neutrinos produced in the B−→π+μ−μ− decay mode is performed using 3 fb−1 of integrated luminosity collected with the LHCb detector in pp collisions at center-of-mass energies of 7 and 8 TeV at the LHC. Neutrinos with masses in the range 250 to 5000 MeV and lifetimes from zero to 1000 ps are probed. In the absence of a signal, upper limits are set on the branching fraction B(B−→π+μ−μ−) as functions of neutrino mass and lifetime. These limits are on the order of 10−9 for short neutrino lifetimes of 1 ps or less. Limits are also set on the coupling between the muon and a possible fourth-generation neutrino.

关键词： NEUTRINOS LUMINOSITY NEUTRINO mass NEUTRINO detectors MUONS -- Decay MUON detection

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Observation of Photon Polarization in the b→sγ Transition

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Physical Review Letters 2014年第16期112卷 161801-161801页

作者： R. Aaij B. Adeva M. Adinolfi A. Affolder Z. Ajaltouni J. Albrecht F. Alessio M. Alexander S. Ali G. Alkhazov P. Alvarez Cartelle A. A. Alves, Jr. S. Amato S. Amerio Y. Amhis L. Anderlini J. Anderson R. Andreassen M. Andreotti J. E. Andrews R. B. Appleby O. Aquines Gutierrez F. Archilli A. Artamonov M. Artuso E. Aslanides G. Auriemma M. Baalouch S. Bachmann J. J. Back A. Badalov V. Balagura W. Baldini R. J. Barlow C. Barschel S. Barsuk W. Barter V. Batozskaya Th. Bauer A. Bay J. Beddow F. Bedeschi I. Bediaga S. Belogurov K. Belous I. Belyaev E. Ben-Haim G. Bencivenni S. Benson J. Benton A. Berezhnoy R. Bernet M.-O. Bettler M. van Beuzekom A. Bien S. Bifani T. Bird A. Bizzeti P. M. Bjørnstad T. Blake F. Blanc J. Blouw S. Blusk V. Bocci A. Bondar N. Bondar W. Bonivento S. Borghi A. Borgia M. Borsato T. J. V. Bowcock E. Bowen C. Bozzi T. Brambach J. van den Brand J. Bressieux D. Brett M. Britsch T. Britton N. H. Brook H. Brown A. Bursche G. Busetto J. Buytaert S. Cadeddu R. Calabrese O. Callot M. Calvi M. Calvo Gomez A. Camboni P. Campana D. Campora Perez F. Caponio A. Carbone G. Carboni R. Cardinale A. Cardini H. Carranza-Mejia L. Carson K. Carvalho Akiba G. Casse L. Cassina L. Castillo Garcia M. Cattaneo Ch. Cauet R. Cenci M. Charles Ph. Charpentier S.-F. Cheung N. Chiapolini M. Chrzaszcz K. Ciba X. Cid Vidal G. Ciezarek P. E. L. Clarke M. Clemencic H. V. Cliff J. Closier C. Coca V. Coco J. Cogan E. Cogneras P. Collins A. Comerma-Montells A. Contu A. Cook M. Coombes S. Coquereau G. Corti I. Counts B. Couturier G. A. Cowan D. C. Craik M. Cruz Torres S. Cunliffe R. Currie C. D’Ambrosio J. Dalseno P. David P. N. Y. David A. Davis I. De Bonis K. De Bruyn S. De Capua M. De Cian J. M. De Miranda L. De Paula W. De Silva P. De Simone D. Decamp M. Deckenhoff L. Del Buono N. Déléage D. Derkach O. Deschamps F. Dettori A. Di Canto H. Dijkstra S. Donleavy F. Dordei M. Dorigo P. Dorosz A. Dosil Suárez D. Dossett A. Dovbnya F. Dupertuis P. Durante R. Dzhelyadin A. Dziurda A. Dzyuba S. Easo U. Egede V. Egorychev S. Eidelman S. Eis Nikhef National Institute for Subatomic Physics Amsterdam The Netherlands Universidad de Santiago de Compostela Santiago de Compostela Spain H.H. Wills Physics Laboratory University of Bristol Bristol United Kingdom Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Clermont Université Université Blaise Pascal CNRS/IN2P3 LPC Clermont-Ferrand France Fakultät Physik Technische Universität Dortmund Dortmund Germany European Organization for Nuclear Research (CERN) Geneva Switzerland School of Physics and Astronomy University of Glasgow Glasgow United Kingdom Petersburg Nuclear Physics Institute (PNPI) Gatchina Russia Sezione INFN di Roma La Sapienza Roma Italy Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Sezione INFN di Padova Padova Italy LAL Université Paris-Sud CNRS/IN2P3 Orsay France Sezione INFN di Firenze Firenze Italy Physik-Institut Universität Zürich Zürich Switzerland University of Cincinnati Cincinnati Ohio USA Sezione INFN di Ferrara Ferrara Italy University of Maryland College Park Maryland USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Max-Planck-Institut für Kernphysik (MPIK) Heidelberg Germany Institute for High Energy Physics (IHEP) Protvino Russia Syracuse University Syracuse New York USA CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Department of Physics University of Warwick Coventry United Kingdom Universitat de Barcelona Barcelona Spain Institute of Theoretical and Experimental Physics (ITEP) Moscow Russia Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland Cavendish Laboratory University of Cambridge Cambridge United Kingdom National Center for Nuclear Research (NCBJ) Warsaw Poland Sezione INFN di Pisa Pisa Italy Centro Brasileiro de Pesquisas Físicas (CBPF) Rio de Janeiro Brazil LPNHE Université Pierre et Marie Curie

This Letter presents a study of the flavor-changing neutral current radiative B±→K±π∓π±γ decays performed using data collected in proton-proton collisions with the LHCb detector at 7 and 8 TeV center-of-mass energies. In this sample, corresponding to an integrated luminosity of 3 fb−1, nearly 14 000 signal events are reconstructed and selected, containing all possible intermediate resonances with a K±π∓π± final state in the [1.1,1.9] GeV/c2 mass range. The distribution of the angle of the photon direction with respect to the plane defined by the final-state hadrons in their rest frame is studied in intervals of K±π∓π± mass and the asymmetry between the number of signal events found on each side of the plane is obtained. The first direct observation of the photon polarization in the b→sγ transition is reported with a significance of 5.2σ.

关键词： MATTER -- Constitution PROTON-proton interactions RESONANCE PARTICLES (nuclear physics) PARTICLE decays

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Measurement of the B¯s0→Ds−Ds+ and B¯s0→D−Ds+ Effective Lifetimes

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Physical Review Letters 2014年第11期112卷 111802-111802页

作者： R. Aaij B. Adeva M. Adinolfi A. Affolder Z. Ajaltouni J. Albrecht F. Alessio M. Alexander S. Ali G. Alkhazov P. Alvarez Cartelle A. A. Alves Jr S. Amato S. Amerio Y. Amhis L. Anderlini J. Anderson R. Andreassen M. Andreotti J. E. Andrews R. B. Appleby O. Aquines Gutierrez F. Archilli A. Artamonov M. Artuso E. Aslanides G. Auriemma M. Baalouch S. Bachmann J. J. Back A. Badalov V. Balagura W. Baldini R. J. Barlow C. Barschel S. Barsuk W. Barter V. Batozskaya Th. Bauer A. Bay J. Beddow F. Bedeschi I. Bediaga S. Belogurov K. Belous I. Belyaev E. Ben-Haim G. Bencivenni S. Benson J. Benton A. Berezhnoy R. Bernet M.-O. Bettler M. van Beuzekom A. Bien S. Bifani T. Bird A. Bizzeti P. M. Bjørnstad T. Blake F. Blanc J. Blouw S. Blusk V. Bocci A. Bondar N. Bondar W. Bonivento S. Borghi A. Borgia M. Borsato T. J. V. Bowcock E. Bowen C. Bozzi T. Brambach J. van den Brand J. Bressieux D. Brett M. Britsch T. Britton N. H. Brook H. Brown A. Bursche G. Busetto J. Buytaert S. Cadeddu R. Calabrese O. Callot M. Calvi M. Calvo Gomez A. Camboni P. Campana D. Campora Perez A. Carbone G. Carboni R. Cardinale A. Cardini H. Carranza-Mejia L. Carson K. Carvalho Akiba G. Casse L. Castillo Garcia M. Cattaneo Ch. Cauet R. Cenci M. Charles Ph. Charpentier S.-F. Cheung N. Chiapolini M. Chrzaszcz K. Ciba X. Cid Vidal G. Ciezarek P. E. L. Clarke M. Clemencic H. V. Cliff J. Closier C. Coca V. Coco J. Cogan E. Cogneras P. Collins A. Comerma-Montells A. Contu A. Cook M. Coombes S. Coquereau G. Corti B. Couturier G. A. Cowan D. C. Craik M. Cruz Torres S. Cunliffe R. Currie C. D’Ambrosio J. Dalseno P. David P. N. Y. David A. Davis I. De Bonis K. De Bruyn S. De Capua M. De Cian J. M. De Miranda L. De Paula W. De Silva P. De Simone D. Decamp M. Deckenhoff L. Del Buono N. Déléage D. Derkach O. Deschamps F. Dettori A. Di Canto H. Dijkstra S. Donleavy F. Dordei P. Dorosz A. Dosil Suárez D. Dossett A. Dovbnya F. Dupertuis P. Durante R. Dzhelyadin A. Dziurda A. Dzyuba S. Easo U. Egede V. Egorychev S. Eidelman D. van Eijk S. Eisenhardt U. Eitschberger R. Ekelh Nikhef National Institute for Subatomic Physics Amsterdam The Netherlands Universidad de Santiago de Compostela Santiago de Compostela Spain H.H. Wills Physics Laboratory University of Bristol Bristol United Kingdom Oliver Lodge Laboratory University of Liverpool Liverpool United Kingdom Clermont Université Université Blaise Pascal CNRS/IN2P3 LPC Clermont-Ferrand France Fakultät Physik Technische Universität Dortmund Dortmund Germany European Organization for Nuclear Research (CERN) Geneva Switzerland School of Physics and Astronomy University of Glasgow Glasgow United Kingdom Petersburg Nuclear Physics Institute (PNPI) Gatchina Russia Sezione INFN di Roma La Sapienza Roma Italy Universidade Federal do Rio de Janeiro (UFRJ) Rio de Janeiro Brazil Sezione INFN di Padova Padova Italy LAL Université Paris-Sud CNRS/IN2P3 Orsay France Sezione INFN di Firenze Firenze Italy Physik-Institut Universität Zürich Zürich Switzerland University of Cincinnati Cincinnati OH USA Sezione INFN di Ferrara Ferrara Italy University of Maryland College Park Maryland USA School of Physics and Astronomy University of Manchester Manchester United Kingdom Max-Planck-Institut für Kernphysik (MPIK) Heidelberg Germany Institute for High Energy Physics (IHEP) Protvino Russia Syracuse University Syracuse New York USA CPPM Aix-Marseille Université CNRS/IN2P3 Marseille France Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany Department of Physics University of Warwick Coventry United Kingdom Universitat de Barcelona Barcelona Spain Institute of Theoretical and Experimental Physics (ITEP) Moscow Russia Ecole Polytechnique Fédérale de Lausanne (EPFL) Lausanne Switzerland Cavendish Laboratory University of Cambridge Cambridge United Kingdom National Center for Nuclear Research (NCBJ) Warsaw Poland Sezione INFN di Pisa Pisa Italy Centro Brasileiro de Pesquisas Físicas (CBPF) Rio de Janeiro Brazil LPNHE Université Pierre et Marie Curie Un

The first measurement of the effective lifetime of the B¯s0 meson in the decay B¯s0→Ds−Ds+ is reported using a proton-proton collision data set, corresponding to an integrated luminosity of 3 fb−1, collected by the LHCb experiment. The measured value of the B¯s0→Ds−Ds+ effective lifetime is 1.379±0.026±0.017 ps, where the uncertainties are statistical and systematic, respectively. This lifetime translates into a measurement of the decay width of the light B¯s0 mass eigenstate of ΓL=0.725±0.014±0.009 ps−1. The B¯s0 lifetime is also measured using the flavor-specific B¯s0→D−Ds+ decay to be 1.52±0.15±0.01 ps.

关键词： PROTON-proton interactions MESONS LUMINOSITY UNCERTAINTY STANDARD deviations

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