First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5-350 GeV

被引：860

作者：

Aguilar, M. ^{[21
,35
]}

Alberti, G. ^{[46
,47
]}

Alpat, B. ^{[46
]}

Alvino, A. ^{[24
,46
,47
]}

Ambrosi, G. ^{[46
]}

Andeen, K. ^{[31
]}

Anderhub, H. ^{[59
]}

Arruda, L. ^{[33
]}

Azzarello, P. ^{[22
,46
]}

Bachlechner, A.

Barao, F. ^{[33
]}

Baret, B. ^{[23
,24
]}

Barrau, A. ^{[23
,24
]}

Barrin, L. ^{[21
]}

Bartoloni, A. ^{[52
]}

Basara, L. ^{[5
,6
]}

Basili, A. ^{[1
,12
]}

Batalha, L. ^{[33
]}

Bates, J. ^{[27
,28
]}

Battiston, R. ^{[46
,47
,50
,51
]}

Bazo, J. ^{[46
]}

Becker, R. ^{[1
,12
]}

Becker, U. ^{[1
,12
]}

Behlmann, M. ^{[1
,12
]}

Beischer, B.

Berdugo, J. ^{[35
]}

Berges, P. ^{[1
,12
]}

Bertucci, B. ^{[46
,47
]}

Bigongiari, G. ^{[48
,49
]}

Biland, A. ^{[59
]}

Bindi, V. ^{[26
]}

Bizzaglia, S. ^{[46
]}

Boella, G. ^{[39
,40
]}

de Boer, W. ^{[31
]}

Bollweg, K. ^{[27
,28
]}

Bolmont, J. ^{[41
,42
]}

Borgia, B. ^{[52
,53
]}

Borsini, S. ^{[46
,47
]}

Boschini, M. J. ^{[39
]}

Boudoul, G. ^{[23
,24
]}

Bourquin, M. ^{[22
]}

Brun, P. ^{[5
,6
]}

Buenerd, M. ^{[23
,24
]}

Burger, J. ^{[1
,12
]}

Burger, W. ^{[47
]}

Cadoux, F. ^{[5
,6
,22
]}

Cai, X. D. ^{[1
,12
]}

Capell, M. ^{[1
,12
]}

Casadei, D. ^{[10
,11
]}

Casaus, J. ^{[35
]}

机构：

[1] Rhein Westfal TH Aachen, Phys Inst B, D-52056 Aachen, Germany

[2] Univ Aarhus, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[3] NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1098 SJ Amsterdam, Netherlands

[4] Middle E Tech Univ, Dept Phys, TR-06800 Ankara, Turkey

[5] CNRS, LAPP, IN2P3, Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France

[6] Univ Savoie, F-74941 Annecy Le Vieux, France

[7] Beihang Univ, BUAA, Beijing 100191, Peoples R China

[8] Chinese Acad Sci, Inst Elect Engn, IEE, Beijing 100080, Peoples R China

[9] Chinese Acad Sci, Inst High Energy Phys, IHEP, Beijing 100039, Peoples R China

[10] INFN Sez Bologna, I-40126 Bologna, Italy

[11] Univ Bologna, I-40126 Bologna, Italy

[12] MIT, Cambridge, MA 02139 USA

[13] Natl Cent Univ, Tao Yuan 32054, Taiwan

[14] Univ Maryland, East West Ctr Space Sci, College Pk, MD 20742 USA

[15] Univ Maryland, IPST, College Pk, MD 20742 USA

[16] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA

[17] Kyungpook Natl Univ, CHEP, Taegu 702701, South Korea

[18] NLR, Natl Aerosp Lab, NL-8300 AD Emmeloord, Netherlands

[19] CNR IROE, I-50125 Florence, Italy

[20] ASDC ESRIN, I-00044 Frascati, Italy

[21] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland

[22] Univ Geneva, DPNC, CH-1211 Geneva 4, Switzerland

[23] CNRS, LPSC, IN2P3, F-38026 St Martin Dheres, France

[24] Univ Grenoble 1, Grenoble INP, F-38026 Grenoble, France

[25] Sun Yat Sen Univ, Guangzhou 510275, Peoples R China

[26] Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA

[27] NASA, Johnson Space Ctr, JSC, Houston, TX 77058 USA

[28] Jacobs Sverdrup, Houston, TX 77058 USA

[29] Natl Space Org, Hsinchu 300, Taiwan

[30] Aalto Univ, Metsahovi Radio Observ, FIN-02540 Kylmala, Finland

[31] Karlsruhe Inst Technol, Inst Expt Kernphys, D-76128 Karlsruhe, Germany

[32] Inst Astrofis Canarias, E-38205 Tenerife, Spain

[33] LIP, Lab Instrumentacao & Fis Expt Particulas, P-1000 Lisbon, Portugal

[34] Chung Shan Inst Sci & Technol, Tao Yuan 325, Taiwan

[35] CIEMAT, Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain

[36] Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico

[37] INFN Sez Milano, I-20090 Milan, Italy

[38] Univ Milan, I-20090 Milan, Italy

[39] INFN Sez Milano Bicocca, I-20126 Milan, Italy

[40] Univ Milano Bicocca, I-20126 Milan, Italy

[41] CNRS, IN2P3, LUPM Ex LPTA, Lab Univ & Particules Montpellier, F-34095 Montpellier, France

[42] Univ Montpellier 2, F-34095 Montpellier, France

[43] Russian Res Ctr, Kurchatov Inst, Moscow 123182, Russia

[44] Southeast Univ, SEU, Nanjing 210096, Jiangsu, Peoples R China

[45] Yale Univ, Dept Phys, New Haven, CT 06520 USA

[46] INFN Sez Perugia, I-06100 Perugia, Italy

[47] Univ Perugia, I-06100 Perugia, Italy

[48] INFN Sez Pisa, I-56100 Pisa, Italy

[49] Univ Pisa, I-56100 Pisa, Italy

[50] INFN TIFPA, I-38123 Povo, Trento, Italy

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 14期

基金：

中国国家自然科学基金;

关键词：

TIME-OF-FLIGHT; FAST TRIGGER; AMS-02; TRD; PROTOTYPE; DETECTOR;

D O I：

10.1103/PhysRevLett.110.141102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A precision measurement by the Alpha Magnetic Spectrometer on the International Space Station of the positron fraction in primary cosmic rays in the energy range from 0.5 to 350 GeV based on 6.8 x 10(6) positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 to similar to 250 GeV, but, from 20 to 250 GeV, the slope decreases by an order of magnitude. The positron fraction spectrum shows no fine structure, and the positron to electron ratio shows no observable anisotropy. Together, these features show the existence of new physical phenomena. DOI: 10.1103/PhysRevLett.110.141102

引用

页数：10

共 53 条

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