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
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 6.8×10[superscript 6] positron and electron events is presented. The very accurate data show that the positro...
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| author | Basil, A. Becker, R. Becker, Ulrich J. Behlmann, Matthew Daniel Berges, P. Burger, Joseph D. Cai, X. D. Capell, Michael H. Chen, Andrew I. Chen, H. Choumilov, Evgueni Choutko, Vitali Dennett, P. Egorov, A. Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Flood, Kevin T. Galaktionov, Y. Gallilee, M. Gargiulo, C. Goglov, Pavel Hungerford, W. Incagli, M. Koulemzine, A. Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Ilia A. Plyaskin, V. Rozhkov, A. Schinzel, D. Steuer, V. Sun, W. Ting, Samuel C. C. Ting, S. M. Titus, Christine Vaurynovich, Siarhei S. Vergain, M. Wang, X. Willenbrock, M. Zuccon, Paolo P. Berges |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Basil, A. Becker, R. Becker, Ulrich J. Behlmann, Matthew Daniel Berges, P. Burger, Joseph D. Cai, X. D. Capell, Michael H. Chen, Andrew I. Chen, H. Choumilov, Evgueni Choutko, Vitali Dennett, P. Egorov, A. Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Flood, Kevin T. Galaktionov, Y. Gallilee, M. Gargiulo, C. Goglov, Pavel Hungerford, W. Incagli, M. Koulemzine, A. Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Ilia A. Plyaskin, V. Rozhkov, A. Schinzel, D. Steuer, V. Sun, W. Ting, Samuel C. C. Ting, S. M. Titus, Christine Vaurynovich, Siarhei S. Vergain, M. Wang, X. Willenbrock, M. Zuccon, Paolo P. Berges |
| author_sort | Basil, A. |
| collection | MIT |
| description | 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 6.8×10[superscript 6] positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 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. |
| first_indexed | 2024-09-23T10:02:31Z |
| format | Article |
| id | mit-1721.1/81241 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:02:31Z |
| publishDate | 2013 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/812412022-09-30T18:29:31Z 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 Basil, A. Becker, R. Becker, Ulrich J. Behlmann, Matthew Daniel Berges, P. Burger, Joseph D. Cai, X. D. Capell, Michael H. Chen, Andrew I. Chen, H. Choumilov, Evgueni Choutko, Vitali Dennett, P. Egorov, A. Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Flood, Kevin T. Galaktionov, Y. Gallilee, M. Gargiulo, C. Goglov, Pavel Hungerford, W. Incagli, M. Koulemzine, A. Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Ilia A. Plyaskin, V. Rozhkov, A. Schinzel, D. Steuer, V. Sun, W. Ting, Samuel C. C. Ting, S. M. Titus, Christine Vaurynovich, Siarhei S. Vergain, M. Wang, X. Willenbrock, M. Zuccon, Paolo P. Berges Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Basil, A. Becker, R. Becker, Ulrich J. Behlmann, Matthew Daniel P. Berges Burger, Joseph D. Cai, X.D. Capell, Michael H. Chen, Andrew I. Chen, H. Choumilov, Evgueni Choutko, Vitali Dennett, P. Egorov, A. Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Flood, Kevin T. Galaktionov, Y. Gallilee, M. Gargiulo, C. Goglov, Pavel Hungerford, W. Incagli, M. Koulemzine, A. Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Ilia A. Plyaskin, V. Rozhkov, A. Schinzel, D. Steuer, V. Sun, W. Ting, Samuel C. C. Ting, S. M. Titus, Christine Vaurynovich, Siarhei S. Vergain, M. Wang, X. Willenbrock, M. Zuccon, Paolo 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 6.8×10[superscript 6] positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 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. United States. Dept. of Energy 2013-09-30T16:14:56Z 2013-09-30T16:14:56Z 2013-04 2013-03 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/81241 Aguilar, M. et al. “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.” Physical Review Letters 110.14 (2013). © 2013 American Physical Society https://orcid.org/0000-0002-5000-7150 https://orcid.org/0000-0001-7374-9774 https://orcid.org/0000-0001-7831-7460 https://orcid.org/0000-0002-2919-9549 https://orcid.org/0000-0003-2249-4542 https://orcid.org/0000-0002-0450-7007 https://orcid.org/0000-0002-6316-0808 https://orcid.org/0000-0003-3513-8408 https://orcid.org/0000-0002-1923-6289 https://orcid.org/0000-0002-8402-3116 https://orcid.org/0000-0002-7172-9021 https://orcid.org/0000-0001-6876-8495 https://orcid.org/0000-0002-2728-0167 https://orcid.org/0000-0001-8018-9701 https://orcid.org/0000-0002-8373-3212 https://orcid.org/0000-0002-5006-6847 https://orcid.org/0000-0002-9105-5386 https://orcid.org/0000-0002-4918-5128 https://orcid.org/0000-0003-2187-5968 https://orcid.org/0000-0002-8667-5660 https://orcid.org/0000-0002-0236-7274 en_US http://dx.doi.org/10.1103/PhysRevLett.110.141102 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Basil, A. Becker, R. Becker, Ulrich J. Behlmann, Matthew Daniel Berges, P. Burger, Joseph D. Cai, X. D. Capell, Michael H. Chen, Andrew I. Chen, H. Choumilov, Evgueni Choutko, Vitali Dennett, P. Egorov, A. Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Flood, Kevin T. Galaktionov, Y. Gallilee, M. Gargiulo, C. Goglov, Pavel Hungerford, W. Incagli, M. Koulemzine, A. Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Ilia A. Plyaskin, V. Rozhkov, A. Schinzel, D. Steuer, V. Sun, W. Ting, Samuel C. C. Ting, S. M. Titus, Christine Vaurynovich, Siarhei S. Vergain, M. Wang, X. Willenbrock, M. Zuccon, Paolo P. Berges 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 |
| title | 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 |
| url | http://hdl.handle.net/1721.1/81241 https://orcid.org/0000-0002-5000-7150 https://orcid.org/0000-0001-7374-9774 https://orcid.org/0000-0001-7831-7460 https://orcid.org/0000-0002-2919-9549 https://orcid.org/0000-0003-2249-4542 https://orcid.org/0000-0002-0450-7007 https://orcid.org/0000-0002-6316-0808 https://orcid.org/0000-0003-3513-8408 https://orcid.org/0000-0002-1923-6289 https://orcid.org/0000-0002-8402-3116 https://orcid.org/0000-0002-7172-9021 https://orcid.org/0000-0001-6876-8495 https://orcid.org/0000-0002-2728-0167 https://orcid.org/0000-0001-8018-9701 https://orcid.org/0000-0002-8373-3212 https://orcid.org/0000-0002-5006-6847 https://orcid.org/0000-0002-9105-5386 https://orcid.org/0000-0002-4918-5128 https://orcid.org/0000-0003-2187-5968 https://orcid.org/0000-0002-8667-5660 https://orcid.org/0000-0002-0236-7274 |
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