Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

Precision Measurement of the positron fraction and the combined electron and positron flux in Primary Cosmic Rays with the Alpha Magnetic Spectrometer on the International Space Station

Jul 7, 2018, 9:45 AM
15m
104 (COEX, Seoul)

104

COEX, Seoul

Parallel Astro-particle Physics and Cosmology Astro-particle Physics and Cosmology

Speaker

Zuhao Li (Chinese Academy of Sciences (CN))

Description

Precision measurements by AMS of the positron fraction and the combined electron and positron flux in primary cosmic rays in the energy range from up to 1000 GeV based on 25 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 that at ∼300 GeV the positron fraction reaches its maximum. This behavior is consistent with a new source of high energy electrons and positrons.

Primary authors

Alberto Oliva (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Alexandre Ghelfi (Centre National de la Recherche Scientifique (FR)) Amaresh Datta (University of Hawai'i at Manoa (US)) Andrea Contin (Universita e INFN, Bologna (IT)) Andreas Bachlechner (Rheinisch Westfaelische Tech. Hoch. (DE)) Andrei Kounine (Massachusetts Inst. of Technology (US)) Bastian Beischer (Rheinisch Westfaelische Tech. Hoch. (DE)) Benoit Jean-Albert Coste (Universita e INFN, Padova (IT)) Bilge Demirkoz (Middle East Technical University (TR)) Bruna Bertucci (Universita e INFN, Perugia (IT)) Carlos Delgado Mendez (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Cen Zhang (Institute of High Energy Physics, Chinese Academy Sciences) Chan Hoon Chung (Rheinisch Westfaelische Tech. Hoch. (DE)) Claudio Corti (University of Hawai'i at Manoa (US)) Corinne Goy (Centre National de la Recherche Scientifique (FR)) Cristina Consolandi (University of Hawai'i at Manoa (US)) Davide Grandi (Universita & INFN, Milano-Bicocca (IT)) Domenico D'Urso (Universita e INFN, Perugia (IT)) Fernando De Carvalho Barao (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part) Francesca Giovacchini (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Francesco Dimiccoli (Universita e INFN, Padova (IT)) Giovanni Ambrosi (Universita e INFN, Perugia (IT)) Giuseppe La Vacca (Universita & INFN, Milano-Bicocca (IT)) Henning Gast (Rheinisch Westfaelische Tech. Hoch. (DE)) Hesheng Chen (Chinese Academy of Sciences (CN)) Hsin-Yi Chou (National Central University (TW)) Hu Liu (Massachusetts Inst. of Technology (US)) Iris Gebauer (KIT - Karlsruhe Institute of Technology (DE)) Javier Berdugo Perez (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Jie Feng (Academia Sinica (TW)) Jorge Casaus (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Laurent Yves Marie Derome (Centre National de la Recherche Scientifique (FR)) Manuel Aguilar-Benitez (Cent.de Investigac.Energeticas Medioambientales y Tecnol. (CIEMAT)) Manuela Vecchi (Universidade de Sao Paulo (BR)) Marco Incagli (INFN Sezione di Pisa, Universita' e Scuola Normale Superiore, P) Matteo Boschini (Univ. degli Studi Milano-Bicocca (IT)) Matteo Duranti (Universita e INFN, Perugia (IT)) Mr Matthew Daniel Behlmann (Massachusetts Inst. of Technology (US)) Maura Graziani (KIT - Karlsruhe Institute of Technology (DE)) Melanie Heil (Massachusetts Inst. of Technology (US)) Mercedes Paniccia (Universite de Geneve (CH)) Miguel Angel Velasco Frutos (Centro de Investigaciones Energéti cas Medioambientales y Tecno) Mike Capell (Massachusetts Inst. of Technology (US)) Nikolas Zimmermann (Rheinisch Westfaelische Tech. Hoch. (DE)) Paolo Zuccon (Massachusetts Inst. of Technology (US)) Philip Von Doetinchem (University of Hawaii at Manoa) Qi Yan (Massachusetts Inst. of Technology (US)) Roberto Battiston (Univ + INFN) Sadakazu Haino (Academia Sinica (TW)) Senquan Lu (Academia Sinica (TW)) Stefan Schael (Rheinisch Westfaelische Tech. Hoch. (DE)) Stefan Zeissler (KIT - Karlsruhe Institute of Technology (DE)) Stefano Della Torre (Universita & INFN, Milano-Bicocca (IT)) Stefano Di Falco (Universita & INFN Pisa (IT)) Travis Gordon Nelson Ulrich Becker (Massachusetts Inst. of Technology (US)) Valerio Formato (Universita e INFN, Perugia (IT)) Veronica Bindi (University of Hawai'i at Manoa (US)) Weiwei Xu (Massachusetts Inst. of Technology (US)) Wim De Boer (KIT - Karlsruhe Institute of Technology (DE)) Xudong Cai (Massachusetts Inst. of Technology (US)) Yuan-Hann Chang (National Central University (TW)) Dr Zhicheng Tang (Chinese Academy of Sciences (CN)) Zhili Weng (Massachusetts Inst. of Technology (US)) Zuhao Li (Chinese Academy of Sciences (CN)) Vitaly Choutko (Massachusetts Inst. of Technology (US))

Presentation materials