Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays

Aguilar, M.; Ambrosi, G.; Anderson, H.; Arruda, L.; Attig, N.; Bagwell, C.; Barao, F.; Barbanera, M.; Barrin, L.; Bartoloni, A.; Battiston, R.; Belyaev, N.; Berdugo, J.; Bertucci, B.; Bindi, V.; Bollweg, K.; Bolster, J.; Borchiellini, M.; Borgia, B.; Boschini, M.J.; Bourquin, M.; Burger, J.; Burger, W.J.; Cai, X.D.; Capell, M.; Casaus, J.; Castellini, G.; Cervelli, F.; Chang, Y.H.; Chen, G.M.; Chen, G.R.; Chen, H.; Chen, H.S.; Chen, Y.; Cheng, L.; Chou, H.Y.; Chouridou, S.; Choutko, V.; Chung, C.H.; Clark, C.; Coignet, G.; Consolandi, C.; Contin, A.; Corti, C.; Cui, Z.; Dadzie, K.; D'Angelo, F.; Dass, A.; Delgado, C.; Della Torre, S.; Demirköz, M.B.; Derome, L.; Di Falco, S.; Di Felice, V.; Díaz, C.; Dimiccoli, F.; von Doetinchem, P.; Dong, F.; Donnini, F.; Duranti, M.; Egorov, A.; Eline, A.; Faldi, F.; Feng, J.; Fiandrini, E.; Fisher, P.; Formato, V.; Gámez, C.; García-López, R.J.; Gargiulo, C.; Gast, H.; Gervasi, M.; Giovacchini, F.; Gómez-Coral, D.M.; Gong, J.; Goy, C.; Grandi, D.; Graziani, M.; Guracho, A.N.; Haino, S.; Han, K.C.; Hashmani, R.K.; He, Z.H.; Heber, B.; Hsieh, T.H.; Hu, J.Y.; Huang, B.W.; Ionica, M.; Incagli, M.; Jia, Yi; Jinchi, H.; Karagöz, GÜLCE; Khan, S.; Khiali, B.; Kirn, Th; Klipfel, A.P.; Kounina, O.; Kounine, A.; Koutsenko, V.; Krasnopevtsev, D.; Kuhlman, A.; Kulemzin, A.; La Vacca, G.; Laudi, E.; Laurenti, G.; LaVecchia, G.; Lazzizzera, I.; Lee, H.T.; Lee, S.C.; Li, H.L.; Li, J.Q.; Li, M.; Li, M.; Li, Q.; Li, Q.; Li, Q.Y.; Li, S.; Li, S.L.; Li, J.H.; Li, Z.H.; Liang, J.; Liang, M.J.; Lin, C.H.; Lippert, T.; Liu, J.H.; Lu, S.Q.; Lu, Y.S.; Luebelsmeyer, K.; Luo, J.Z.; Luo, S.D.; Luo, Xi; Mañá, C.; Marín, J.; Marquardt, J.; Martin, T.; Martínez, G.; Masi, N.; Maurin, D.; Medvedeva, T.; Menchaca-Rocha, A.; Meng, Q.; Molero, M.; Mott, P.; Mussolin, L.; Jozani, Y; Negrete, J.; Nicolaidis, R.; Nikonov, N.; Nozzoli, F.; Ocampo-Peleteiro, J.; Oliva, A.; Orcinha, M.; Ottupara, M.A.; Palermo, M.; Palmonari, F.; Paniccia, M.; Pashnin, A.; Pauluzzi, M.; Pensotti, S.; Plyaskin, V.; Poluianov, S.; Qin, X.; Qu, Z.Y.; Quadrani, L.; Rancoita, P.G.; Rapin, D.; Conde, A; Robyn, E.; Rodríguez-García, I.; Romaneehsen, L.; Rossi, F.; Rozhkov, A.; Rozza, D.; Sagdeev, R.; Savin, E.; Schael, S.; von Dratzig, A; Schwering, G.; Seo, E.S.; Shan, B.S.; Siedenburg, T.; Silvestre, G.; Song, J.W.; Song, X.J.; Sonnabend, R.; Strigari, L.; Su, T.; Sun, Q.; Sun, Z.T.; Tacconi, M.; Tang, X.W.; Tang, Z.C.; Tian, J.; Tian, Y.; Ting, Samuel; Ting, S.M.; Tomassetti, N.; Torsti, J.; Urban, T.; Usoskin, I.; Vagelli, V.; Vainio, R.; Valencia-Otero, M.; Valente, E.; Valtonen, E.; Vázquez Acosta, M.; Vecchi, M.; Velasco, M.; Vialle, J.P.; Wang, C.X.; Wang, L.; Wang, L.Q.; Wang, N.H.; Wang, Q.L.; Wang, S.; Wang, X.; Wang, Yu; Wang, Z.M.; Wei, J.; Weng, Z.L.; Wu, H.; Wu, Y.; Xiao, J.N.; Xiong, R.Q.; Xiong, X.Z.; Xu, W.; Yan, Q.; Yang, H.T.; Yang, Y.; Yelland, A.; Yi, H.; You, Y.H.; Yu, Y.M.; Yu, Z.Q.; Zhang, C.; Zhang, F.; Zhang, F.Z.; Zhang, J.; Zhang, J.H.; Zhang, Z.; Zhao, F.; Zheng, C.; Zheng, Z.M.; Zhuang, H.L.; Zhukov, V.; Zichichi, A.; Zuccon, P.

doi:10.1103/physrevlett.131.151002

Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays

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Aguilar M., Ambrosi G., Anderson H., Arruda L., Attig N., Bagwell C., ...More

Physical review letters, vol.131, no.15, pp.151002, 2023 (SCI-Expanded)

Publication Type: Article / Article
Volume: 131 Issue: 15
Publication Date: 2023
Doi Number: 10.1103/physrevlett.131.151002
Journal Name: Physical review letters
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, DIALNET
Page Numbers: pp.151002
Middle East Technical University Affiliated: Yes

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.