Cosmic-Ray Positron Energy Spectrum Measured by PAMELA

被引：239

作者：

Adriani, O. ^{[1
,2
]}

Barbarino, G. C. ^{[3
,4
]}

Bazilevskaya, G. A. ^{[5
]}

Bellotti, R. ^{[6
,7
]}

Bianco, A. ^{[8
,9
]}

Boezio, M. ^{[8
]}

Bogomolov, E. A. ^{[10
]}

Bongi, M. ^{[1
,2
]}

Bonvicini, V. ^{[8
]}

Bottai, S. ^{[2
]}

Bruno, A. ^{[6
,7
]}

Cafagna, F. ^{[7
]}

Campana, D. ^{[4
]}

Carbone, R. ^{[8
]}

Carlson, P. ^{[11
,12
]}

Casolino, M. ^{[13
]}

Castellini, G. ^{[14
]}

De Donato, C. ^{[13
]}

De Santis, C. ^{[13
,15
]}

De Simone, N. ^{[13
]}

Di Felice, V. ^{[13
]}

Formato, V. ^{[8
,9
]}

Galper, A. M. ^{[16
]}

Karelin, A. V. ^{[17
]}

Koldashov, S. V. ^{[17
]}

Koldobskiy, S. A. ^{[17
]}

Krutkov, S. Y. ^{[10
]}

Kvashnin, A. N. ^{[5
]}

Leonov, A. ^{[17
]}

Malakhov, V. ^{[17
]}

Marcelli, L. ^{[15
]}

Martucci, M. ^{[15
,18
]}

Mayorov, A. G. ^{[17
]}

Menn, W. ^{[19
]}

Merge, M. ^{[13
,15
]}

Mikhailov, V. V. ^{[17
]}

Mocchiutti, E. ^{[8
]}

Monaco, A. ^{[6
,7
]}

Mori, N. ^{[2
]}

Munini, R. ^{[8
,9
]}

Osteria, G. ^{[4
]}

Palma, F. ^{[13
,15
]}

Papini, P. ^{[2
]}

Pearce, M. ^{[11
,12
]}

Picozza, P. ^{[13
,15
]}

Pizzolotto, C. ^{[20
,21
]}

Ricci, M. ^{[18
]}

Ricciarini, S. B. ^{[2
]}

Rossetto, L. ^{[11
,12
]}

Sarkar, R. ^{[8
]}

机构：

[1] Univ Florence, Dept Phys, I-50019 Florence, Italy

[2] Ist Nazl Fis Nucl, Sez Florence, I-50019 Florence, Italy

[3] Univ Naples Federico II, Dept Phys, I-80126 Naples, Italy

[4] Ist Nazl Fis Nucl, Sez Naples, I-80126 Naples, Italy

[5] PN Lebedev Phys Inst, RU-119991 Moscow, Russia

[6] Univ Bari, Dept Phys, I-70126 Bari, Italy

[7] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[8] Ist Nazl Fis Nucl, Sez Trieste, I-34149 Trieste, Italy

[9] Univ Trieste, Dept Phys, I-34147 Trieste, Italy

[10] AF Ioffe Phys Tech Inst, RU-194021 St Petersburg, Russia

[11] KTH Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden

[12] AlbaNova Univ Ctr, Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden

[13] Ist Nazl Fis Nucl, Sez Rome Tor Vergata, I-00133 Rome, Italy

[14] IFAC, I-50019 Florence, Italy

[15] Univ Roma Tor Vergata, Dept Phys, I-00133 Rome, Italy

[16] Natl Res Nucl Univ MEPhI, RU-11540 Moscow, Russia

[17] Natl Res Nucl Univ MEPhI, RU-115409 Moscow, Russia

[18] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[19] Univ Siegen, Dept Phys, D-57068 Siegen, Germany

[20] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy

[21] ASI, Sci Data Ctr, I-00044 Frascati, Italy

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 08期

基金：

瑞典研究理事会; 俄罗斯基础研究基金会;

关键词：

SOLAR MINIMUM; ELECTRONS; MODULATION; FRACTION; RATIO; EARTH;

D O I：

10.1103/PhysRevLett.111.081102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Precision measurements of the positron component in the cosmic radiation provide important information about the propagation of cosmic rays and the nature of particle sources in our Galaxy. The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray positron flux and fraction that extends previously published measurements up to 300 GeV in kinetic energy. The combined measurements of the cosmic-ray positron energy spectrum and fraction provide a unique tool to constrain interpretation models. During the recent solar minimum activity period from July 2006 to December 2009, approximately 24 500 positrons were observed. The results cannot be easily reconciled with purely secondary production, and additional sources of either astrophysical or exotic origin may be required.

引用

页数：6

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