Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays
Affiliations
- 1 Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain.
- 2 INFN Sezione di Perugia, 06100 Perugia, Italy.
- 3 Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA.
- 4 Laboratório de Instrumentação e Física Experimental de Partículas (LIP), 1649-003 Lisboa, Portugal.
- 5 Jülich Supercomputing Centre and JARA-FAME, Research Centre Jülich, 52425 Jülich, Germany.
- 6 European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland.
- 7 INFN Sezione di Roma 1, 00185 Roma, Italy.
- 8 INFN TIFPA, 38123 Trento, Italy.
- 9 Università di Trento, 38123 Trento, Italy.
- 10 Università di Perugia, 06100 Perugia, Italy.
- 11 Physics and Astronomy Department, University of Hawaii, Honolulu, Hawaii 96822, USA.
- 12 National Aeronautics and Space Administration Johnson Space Center (JSC), Houston, Texas 77058, USA.
- 13 Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700 AV Groningen, Netherlands.
- 14 Università di Roma La Sapienza, 00185 Roma, Italy.
- 15 INFN Sezione di Milano-Bicocca, 20126 Milano, Italy.
- 16 DPNC, Université de Genève, 1211 Genève 4, Switzerland.
- 17 CNR-IROE, 50125 Firenze, Italy.
- 18 INFN Sezione di Pisa, 56100 Pisa, Italy.
- 19 Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan.
- 20 Institute of High Energy Physics (IHEP), Chinese Academy of Sciences, Beijing 100049, China.
- 21 University of Chinese Academy of Sciences (UCAS), Beijing 100049, China.
- 22 Shandong Institute of Advanced Technology (SDIAT), Jinan, Shandong 250100, China.
- 23 Zhejiang University (ZJU), Hangzhou 310058, China.
- 24 I. Physics Institute and JARA-FAME, RWTH Aachen University, 52056 Aachen, Germany.
- 25 Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, LAPP-IN2P3, 74000 Annecy, France.
- 26 INFN Sezione di Bologna, 40126 Bologna, Italy.
- 27 Università di Bologna, 40126 Bologna, Italy.
- 28 Shandong University (SDU), Jinan, Shandong 250100, China.
- 29 Department of Physics, Middle East Technical University (METU), 06800 Ankara, Türkiye.
- 30 Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France.
- 31 INFN Sezione di Roma Tor Vergata, 00133 Roma, Italy.
- 32 Southeast University (SEU), Nanjing 210096, China.
- 33 Sun Yat-Sen University (SYSU), Guangzhou 510275, China.
- 34 Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, and Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain.
- 35 Università di Milano-Bicocca, 20126 Milano, Italy.
- 36 Instituto de Física, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, 01000 Mexico.
- 37 National Chung-Shan Institute of Science and Technology (NCSIST), Longtan, Tao Yuan 32546, Taiwan.
- 38 Institut für Experimentelle und Angewandte Physik, Christian-Alberts-Universität zu Kiel, 24118 Kiel, Germany.
- 39 Academia Sinica Grid Center (ASGC), Nankang, Taipei 11529, Taiwan.
- 40 Institute of Electrical Engineering (IEE), Chinese Academy of Sciences, Beijing 100190, China.
- 41 Sodankylä Geophysical Observatory and Space Physics and Astronomy Research Unit, University of Oulu, 90014 Oulu, Finland.
- 42 East-West Center for Space Science, University of Maryland, College Park, Maryland 20742, USA.
- 43 IPST, University of Maryland, College Park, Maryland 20742, USA.
- 44 Beihang University (BUAA), Beijing 100191, China.
- 45 Space Research Laboratory, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland.
- 46 Agenzia Spaziale Italiana (ASI), 00133 Roma, Italy.
- 47 Physics Department and Center for High Energy and High Field Physics, National Central University (NCU), Tao Yuan 32054, Taiwan.
- 48 National Cheng Kung University, Tainan 70101, Taiwan.
- PMID: 37897756
- DOI: 10.1103/PhysRevLett.131.151002
Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays
Authors
Affiliations
- 1 Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain.
- 2 INFN Sezione di Perugia, 06100 Perugia, Italy.
- 3 Massachusetts Institute of Technology (MIT), Cambridge, Massachusetts 02139, USA.
- 4 Laboratório de Instrumentação e Física Experimental de Partículas (LIP), 1649-003 Lisboa, Portugal.
- 5 Jülich Supercomputing Centre and JARA-FAME, Research Centre Jülich, 52425 Jülich, Germany.
- 6 European Organization for Nuclear Research (CERN), 1211 Geneva 23, Switzerland.
- 7 INFN Sezione di Roma 1, 00185 Roma, Italy.
- 8 INFN TIFPA, 38123 Trento, Italy.
- 9 Università di Trento, 38123 Trento, Italy.
- 10 Università di Perugia, 06100 Perugia, Italy.
- 11 Physics and Astronomy Department, University of Hawaii, Honolulu, Hawaii 96822, USA.
- 12 National Aeronautics and Space Administration Johnson Space Center (JSC), Houston, Texas 77058, USA.
- 13 Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700 AV Groningen, Netherlands.
- 14 Università di Roma La Sapienza, 00185 Roma, Italy.
- 15 INFN Sezione di Milano-Bicocca, 20126 Milano, Italy.
- 16 DPNC, Université de Genève, 1211 Genève 4, Switzerland.
- 17 CNR-IROE, 50125 Firenze, Italy.
- 18 INFN Sezione di Pisa, 56100 Pisa, Italy.
- 19 Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan.
- 20 Institute of High Energy Physics (IHEP), Chinese Academy of Sciences, Beijing 100049, China.
- 21 University of Chinese Academy of Sciences (UCAS), Beijing 100049, China.
- 22 Shandong Institute of Advanced Technology (SDIAT), Jinan, Shandong 250100, China.
- 23 Zhejiang University (ZJU), Hangzhou 310058, China.
- 24 I. Physics Institute and JARA-FAME, RWTH Aachen University, 52056 Aachen, Germany.
- 25 Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, LAPP-IN2P3, 74000 Annecy, France.
- 26 INFN Sezione di Bologna, 40126 Bologna, Italy.
- 27 Università di Bologna, 40126 Bologna, Italy.
- 28 Shandong University (SDU), Jinan, Shandong 250100, China.
- 29 Department of Physics, Middle East Technical University (METU), 06800 Ankara, Türkiye.
- 30 Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France.
- 31 INFN Sezione di Roma Tor Vergata, 00133 Roma, Italy.
- 32 Southeast University (SEU), Nanjing 210096, China.
- 33 Sun Yat-Sen University (SYSU), Guangzhou 510275, China.
- 34 Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, and Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain.
- 35 Università di Milano-Bicocca, 20126 Milano, Italy.
- 36 Instituto de Física, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, 01000 Mexico.
- 37 National Chung-Shan Institute of Science and Technology (NCSIST), Longtan, Tao Yuan 32546, Taiwan.
- 38 Institut für Experimentelle und Angewandte Physik, Christian-Alberts-Universität zu Kiel, 24118 Kiel, Germany.
- 39 Academia Sinica Grid Center (ASGC), Nankang, Taipei 11529, Taiwan.
- 40 Institute of Electrical Engineering (IEE), Chinese Academy of Sciences, Beijing 100190, China.
- 41 Sodankylä Geophysical Observatory and Space Physics and Astronomy Research Unit, University of Oulu, 90014 Oulu, Finland.
- 42 East-West Center for Space Science, University of Maryland, College Park, Maryland 20742, USA.
- 43 IPST, University of Maryland, College Park, Maryland 20742, USA.
- 44 Beihang University (BUAA), Beijing 100191, China.
- 45 Space Research Laboratory, Department of Physics and Astronomy, University of Turku, 20014 Turku, Finland.
- 46 Agenzia Spaziale Italiana (ASI), 00133 Roma, Italy.
- 47 Physics Department and Center for High Energy and High Field Physics, National Central University (NCU), Tao Yuan 32054, Taiwan.
- 48 National Cheng Kung University, Tainan 70101, Taiwan.
- PMID: 37897756
- DOI: 10.1103/PhysRevLett.131.151002
Abstract
We present the precision measurements of 11 years of daily cosmic positron fluxes in the rigidity range from 1.00 to 41.9 GV based on 3.4×10^{6} positrons collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The positron fluxes show distinctly different time variations from the electron fluxes at short and long timescales. A hysteresis between the electron fluxes and the positron fluxes is observed with a significance greater than 5σ at rigidities below 8.5 GV. On the contrary, the positron fluxes and the proton fluxes show similar time variation. Remarkably, we found that positron fluxes are modulated more than proton fluxes with a significance greater than 5σ for rigidities below 7 GV. These continuous daily positron fluxes, together with AMS daily electron, proton, and helium fluxes over an 11-year solar cycle, provide unique input to the understanding of both the charge-sign and mass dependencies of cosmic rays in the heliosphere.