High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station
A precision measurement by AMS of the positron fraction in primary cosmic rays in the energy range from 0.5 to 500 GeV based on 10.9 million positron and electron events is presented. This measurement extends the energy range of our previous observation and increases its precision. The new results s...
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| author | Becker, Ulrich J. Behlmann, Matthew Daniel Burger, Joseph D. Cai, Xudong Capell, Michael H. Carosi, G. Chen, Andrew I. Choumilov, Evgueni Choutko, Vitali Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Galaktionov, Y. Goglov, Pavel Heil, Melanie Henning, R. Hsieh, Timothy Hwa-wei Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Alexei Li, Q. Plyaskin, Vasily Rozhkov, Andrey B. Rybka, G. Shi, X. Y. Sun, Wei Sun, W. H. Ting, Samuel C. C. Ting, Susan Marks Vaurynovich, Siarhei S. Wang, Xiaozhen Weng, Zhili Xie, M. Xu, Weiwei Zhou, F. Zuccon, Paolo Monreal, Benjamin, 1977- Chen, Hai, Ph. D. Massachusetts Institute of Technology |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Becker, Ulrich J. Behlmann, Matthew Daniel Burger, Joseph D. Cai, Xudong Capell, Michael H. Carosi, G. Chen, Andrew I. Choumilov, Evgueni Choutko, Vitali Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Galaktionov, Y. Goglov, Pavel Heil, Melanie Henning, R. Hsieh, Timothy Hwa-wei Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Alexei Li, Q. Plyaskin, Vasily Rozhkov, Andrey B. Rybka, G. Shi, X. Y. Sun, Wei Sun, W. H. Ting, Samuel C. C. Ting, Susan Marks Vaurynovich, Siarhei S. Wang, Xiaozhen Weng, Zhili Xie, M. Xu, Weiwei Zhou, F. Zuccon, Paolo Monreal, Benjamin, 1977- Chen, Hai, Ph. D. Massachusetts Institute of Technology |
| author_sort | Becker, Ulrich J. |
| collection | MIT |
| description | A precision measurement by AMS of the positron fraction in primary cosmic rays in the energy range from 0.5 to 500 GeV based on 10.9 million positron and electron events is presented. This measurement extends the energy range of our previous observation and increases its precision. The new results show, for the first time, that above ∼200 GeV the positron fraction no longer exhibits an increase with energy. |
| first_indexed | 2024-09-23T10:50:37Z |
| format | Article |
| id | mit-1721.1/90505 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:50:37Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/905052023-02-26T10:52:21Z High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station Becker, Ulrich J. Behlmann, Matthew Daniel Burger, Joseph D. Cai, Xudong Capell, Michael H. Carosi, G. Chen, Andrew I. Choumilov, Evgueni Choutko, Vitali Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Galaktionov, Y. Goglov, Pavel Heil, Melanie Henning, R. Hsieh, Timothy Hwa-wei Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Alexei Li, Q. Plyaskin, Vasily Rozhkov, Andrey B. Rybka, G. Shi, X. Y. Sun, Wei Sun, W. H. Ting, Samuel C. C. Ting, Susan Marks Vaurynovich, Siarhei S. Wang, Xiaozhen Weng, Zhili Xie, M. Xu, Weiwei Zhou, F. Zuccon, Paolo Monreal, Benjamin, 1977- Chen, Hai, Ph. D. Massachusetts Institute of Technology Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Becker, Ulrich J. Behlmann, Matthew Daniel Burger, Joseph D. Cai, Xudong Capell, Michael H. Carosi, G. Chen, Andrew I. Chen, Hai Choumilov, Evgueni Choutko, Vitali Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Galaktionov, Y. Goglov, Pavel Heil, Melanie Henning, R. Hsieh, Timothy Hwa-wei Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Alexei Li, Q. Monreal, Benjamin Plyaskin, Vasily Rozhkov, Andrey B. Rybka, G. Shi, X. Y. Sun, Wei Sun, W. H. Ting, Samuel C. C. Ting, Susan Marks Vaurynovich, Siarhei S. Wang, Xiaozhen Weng, Zhili Xie, M. Xu, Weiwei Zhou, F. Zuccon, Paolo A precision measurement by AMS of the positron fraction in primary cosmic rays in the energy range from 0.5 to 500 GeV based on 10.9 million positron and electron events is presented. This measurement extends the energy range of our previous observation and increases its precision. The new results show, for the first time, that above ∼200 GeV the positron fraction no longer exhibits an increase with energy. 2014-10-01T14:23:16Z 2014-10-01T14:23:16Z 2014-09 2014-08 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/90505 Accardo, L., M. Aguilar, D. Aisa, B. Alpat, A. Alvino, G. Ambrosi, K. Andeen, et al. “High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station.” Physical Review Letters 113, no. 12 (September 2014). © 2014 American Physical Society https://orcid.org/0000-0002-7157-4613 https://orcid.org/0000-0001-7374-9774 https://orcid.org/0000-0001-7831-7460 https://orcid.org/0000-0002-2919-9549 https://orcid.org/0000-0002-0450-7007 https://orcid.org/0000-0002-6316-0808 https://orcid.org/0000-0001-8187-7266 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/0000-0002-4436-6077 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/0000-0002-7216-9206 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.113.121101 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 | Becker, Ulrich J. Behlmann, Matthew Daniel Burger, Joseph D. Cai, Xudong Capell, Michael H. Carosi, G. Chen, Andrew I. Choumilov, Evgueni Choutko, Vitali Eline, Alexandre Eppling, Frederic J. Fisher, Peter H. Galaktionov, Y. Goglov, Pavel Heil, Melanie Henning, R. Hsieh, Timothy Hwa-wei Kounina, Olga Kounine, Andrei Koutsenko, Vladimir Krafczyk, Matthew Scott Lebedev, Alexei Li, Q. Plyaskin, Vasily Rozhkov, Andrey B. Rybka, G. Shi, X. Y. Sun, Wei Sun, W. H. Ting, Samuel C. C. Ting, Susan Marks Vaurynovich, Siarhei S. Wang, Xiaozhen Weng, Zhili Xie, M. Xu, Weiwei Zhou, F. Zuccon, Paolo Monreal, Benjamin, 1977- Chen, Hai, Ph. D. Massachusetts Institute of Technology High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station |
| title | High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station |
| title_full | High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station |
| title_fullStr | High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station |
| title_full_unstemmed | High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station |
| title_short | High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station |
| title_sort | high statistics measurement of the positron fraction in primary cosmic rays of 0 5 500 gev with the alpha magnetic spectrometer on the international space station |
| url | http://hdl.handle.net/1721.1/90505 https://orcid.org/0000-0002-7157-4613 https://orcid.org/0000-0001-7374-9774 https://orcid.org/0000-0001-7831-7460 https://orcid.org/0000-0002-2919-9549 https://orcid.org/0000-0002-0450-7007 https://orcid.org/0000-0002-6316-0808 https://orcid.org/0000-0001-8187-7266 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/0000-0002-4436-6077 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/0000-0002-7216-9206 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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