Title
Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station
Date Issued
26 August 2016
Access level
open access
Resource Type
journal article
Author(s)
Aguilar M.
Ali Cavasonza L.
Alpat B.
Ambrosi G.
Arruda L.
Attig N.
Aupetit S.
Azzarello P.
Bachlechner A.
Barao F.
Barrau A.
Barrin L.
Bartoloni A.
Basara L.
Başecmez-Du Pree S.
Battarbee M.
Battiston R.
Becker U.
Behlmann M.
Beischer B.
Berdugo J.
Bertucci B.
Bindi V.
Boella G.
De Boer W.
Bollweg K.
Bonnivard V.
Borgia B.
Boschini M.J.
Bourquin M.
Bueno E.F.
Burger J.
Cadoux F.
Cai X.D.
Capell M.
Caroff S.
Casaus J.
Castellini G.
Cernuda I.
Cervelli F.
Chae M.J.
Chang Y.H.
Chen A.I.
Chen G.M.
Chen H.S.
Cheng L.
Chou H.Y.
Choumilov E.
Choutko V.
Chung C.H.
Clark C.
Clavero R.
Coignet G.
Consolandi C.
Contin A.
Corti C.
Coste B.
Creus W.
Crispoltoni M.
Cui Z.
Dai Y.M.
Delgado C.
Della Torre S.
Demirköz M.B.
Derome L.
Di Falco S.
Dimiccoli F.
Díaz C.
Von Doetinchem P.
Dong F.
Donnini F.
Duranti M.
D'Urso D.
Egorov A.
Eline A.
Eronen T.
Feng J.
Fiandrini E.
Finch E.
Fisher P.
Formato V.
Galaktionov Y.
Gallucci G.
García B.
García-López R.J.
Gargiulo C.
Gast H.
Gebauer I.
Gervasi M.
Ghelfi A.
Giovacchini F.
Goglov P.
Gómez-Coral D.M.
Gong J.
Goy C.
Grabski V.
Grandi D.
Graziani M.
Guerri I.
RWTH Aachen University,
Publisher(s)
American Physical Society
Abstract
A precision measurement by AMS of the antiproton flux and the antiproton-to-proton flux ratio in primary cosmic rays in the absolute rigidity range from 1 to 450 GV is presented based on 3.49×105 antiproton events and 2.42×109 proton events. The fluxes and flux ratios of charged elementary particles in cosmic rays are also presented. In the absolute rigidity range ∼60 to ∼500 GV, the antiproton p, proton p, and positron e+ fluxes are found to have nearly identical rigidity dependence and the electron e- flux exhibits a different rigidity dependence. Below 60 GV, the (p/p), (p/e+), and (p/e+) flux ratios each reaches a maximum. From ∼60 to ∼500 GV, the (p/p), (p/e+), and (p/e+) flux ratios show no rigidity dependence. These are new observations of the properties of elementary particles in the cosmos.
Volume
117
Issue
9
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Astronomía
Scopus EID
2-s2.0-84989949650
Source
Physical Review Letters
ISSN of the container
00319007
Sponsor(s)
We thank former NASA Administrator Daniel S. Goldin for his dedication to the legacy of the ISS as a scientific laboratory and his decision for NASA to fly AMS as a DOE payload. We also acknowledge the continuous support of the NASA leadership including Charles Bolden and William H. Gerstenmaier and of the JSC and MSFC flight control teams which has allowed AMS to operate optimally on the ISS for five years. We are grateful for the support of Jim Siegrist and his staff of the DOE. We also acknowledge the continuous support from MIT and its School of Science, Michael Sipser, Marc Kastner, Ernest Moniz, Richard Milner, and Boleslaw Wyslouch. Research supported by Sao Paulo Research Foundation (FAPESP) Grants No. 2014/19149-7, No. 2014/50747-8, and No. 2015-50378-5, Brazil; CAS, NSFC, MOST, NLAA, the provincial governments of Shandong, Jiangsu, Guangdong, and the China Scholarship Council, China; the Finnish Funding Agency for Innovation (Tekes) Grants No. 40361/01 and No. 40518/03 and the Academy of Finland Grant No. 258963, Finland; CNRS, IN2P3, CNES, Enigmass, and the ANR, France; Pascale Ehrenfreund, DLR, and JARA-HPC under Project No. JARA0052, Germany; INFN and ASI under ASI-INFN Agreements No. 2013-002-R.0 and No. 2014-037-R.0, Italy; CHEP Grants No. NRF-2009-0080142 and No. NRF-2012-010226 at Kyungpook National University and No. NRF-2013-004883 at Ewha Womans University, Korea; the Consejo Nacional de Ciencia y Tecnologa and UNAM, Mexico; FCT under Grant No. PTDC/FIS/122567/2010, Portugal; CIEMAT, IAC, CDTI, and SEIDI-MINECO under Grants No. AYA2012-39526-C02-(01/02), No. ESP2015-71662-C2-(1-P/2-P), No. SEV-2011-0187, No. SEV-2015-0548, and No. MDM-2015-0509, Spain; the Swiss National Science Foundation (SNSF), federal and cantonal authorities, Switzerland; Academia Sinica and the Ministry of Science and Technology (MOST) under Grants No. 103-2112-M-006-018-MY3, No. 104-2112-M-001-027, and No. CDA-105-M06, former President of Academia Sinica Yuan-Tseh Lee, and former Ministers of MOST Maw-Kuen Wu and Luo-Chuan Lee, Taiwan; the Turkish Atomic Energy Authority at METU, Turkey; and NSF Grant No. 1455202, Wyle Laboratories Grant No. 2014/T72497, and NASA NESSF Grant No. HELIO15F-0005, USA. We gratefully acknowledge the strong support from CERN including Rolf-Dieter Heuer and Fabiola Gianotti, from the CERN IT department and Bernd Panzer-Steindel, and from the European Space Agency including Johann-Dietrich Warner and Simonetta Di Pippo. We are grateful for important discussions with Fiorenza Donato, Jonathan Ellis, Jonathan Feng, Igor Moskalenko, Michael Salamon, Subir Sarkar, Joachim Tramper, Michael S. Turner, Steven Weinberg, and Arnold Wolfendale.
SEIDI-MINECO - AYA2012-39526-C02-(01/02, ESP2015-71662-C2-(1-P/2-P, MDM-2015-0509, SEV-2011-0187, SEV-2015-0548
Sao Paulo Research Foundation
School of Science
Turkish Atomic Energy Authority at METU
National Science Foundation - 1455202, 2014/T72497, HELIO15F-0005
U.S. Department of Energy
National Aeronautics and Space Administration
Illinois Arts Council
Johnson Space Center
Massachusetts Institute of Technology
Division of Loan Repayment - JARA0052
College of Arts and Sciences, University of Nebraska-Lincoln
Agence Nationale de la Recherche
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschun
Fundação de Amparo à Pesquisa do Estado de São Paulo - 2014/19149-7, 2014/50747-8, 2015-50378-5
National Natural Science Foundation of China
Centro para el Desarrollo Tecnológico Industrial
Centre National d’Etudes Spatiales
Agenzia Spaziale Italiana - 2013-002-R.0, 2014-037-R.0, NRF-2009-0080142, NRF-2012-010226
Instituto Nazionale di Fisica Nucleare
Centre National de la Recherche Scientifique
Universidad Nacional Autónoma de México
Ministerio de Ciencia y Tecnología - 103-2112-M-006-018-MY3, 104-2112-M-001-027, CDA-105-M06
Fundació Catalana de Trasplantament - PTDC/FIS/122567/2010
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
Institut National de Physique Nucléaire et de Physique des Particules
provincial governments of Shandong, Jiangsu, Guangdong
Sources of information:
Directorio de Producción Científica
Scopus