Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope

Abdollahi, S; Ackermann, M; Ajello, M; Atwood, Wb; Baldini, L; Barbiellini, G; Bastieri, D; Bellazzini, R; Bloom, Ed; Bonino, R; Brandt, Tj; Bregeon, J; Bruel, P; Buehler, R; Cameron, Ra; Caputo, R; Caragiulo, M; Castro, D; Cavazzuti, E; Cecchi, C; Chekhtman, A; Ciprini, S; Cohen-Tanugi, J; Costanza, F; Cuoco, A; Cutini, S; D'Ammando, F; De Palma, F; Desiante, R; Digel, Sw; Di Lalla, N; Di Mauro, M; Di Venere, L; Drell, Ps; Drlica-Wagner, A; Favuzzi, C; Focke, Wb; Funk, S; Fusco, P; Gargano, F; Gasparrini, D; Giglietto, N; Giordano, F; Giroletti, M; Green, D; Guillemot, L; Guiriec, S; Harding, Ak; Jogler, T; Johannesson, G; Kamae, T; Kuss, M; La Mura, G; Latronico, L; Longo, F; Loparco, F; Lubrano, P; Maldera, S; Malyshev, D; Manfreda, A; Mazziotta, Mn; Michelson, Pf; Mirabal, N; Mitthumsiri, W; Mizuno, T; Moiseev, Aa; Monzani, Me; Morselli, A; Moskalenko, Iv; Negro, M; Nuss, E; Orlando, E; Paneque, D; Perkins, Js; Pesce-Rollins, M; Piron, F; Pivato, G; Porter, Ta; Principe, G; Raino, S; Rando, R; Razzano, M; Reimer, A; Reimer, O; Sgro, C; Simone, D; Siskind, Ej; Spada, F; Spandre, G; Spinelli, P; Tajima, H; Thayer, Jb; Tibaldo, L; Torres, Df; Troja, E; Wood, M; Worley, A; Zaharijas, G; Zimmer, S

doi:10.1103/PhysRevD.95.082007

We present a measurement of the cosmic-ray electron + positron spectrum between 7 GeV and 2 TeV performed with almost seven years of data collected with the Fermi Large Area Telescope. We find that the spectrum is well fit by a broken power law with a break energy at about 50 GeV. Above 50 GeV, the spectrum is well described by a single power law with a spectral index of 3.07 +/- 0.02 (stat +/- syst) +/- 0.04 (energy measurement). An exponential cutoff lower than 1.8 TeV is excluded at 95% CL.

Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope / Abdollahi, S; Ackermann, M; Ajello, M; Atwood, Wb; Baldini, L; Barbiellini, G; Bastieri, D; Bellazzini, R; Bloom, Ed; Bonino, R; Brandt, Tj; Bregeon, J; Bruel, P; Buehler, R; Cameron, Ra; Caputo, R; Caragiulo, M; Castro, D; Cavazzuti, E; Cecchi, C; Chekhtman, A; Ciprini, S; Cohen-Tanugi, J; Costanza, F; Cuoco, A; Cutini, S; D'Ammando, F; de Palma, F; Desiante, R; Digel, Sw; Di Lalla, N; Di Mauro, M; Di Venere, L; Drell, Ps; Drlica-Wagner, A; Favuzzi, C; Focke, Wb; Funk, S; Fusco, P; Gargano, F; Gasparrini, D; Giglietto, N; Giordano, F; Giroletti, M; Green, D; Guillemot, L; Guiriec, S; Harding, Ak; Jogler, T; Johannesson, G; Kamae, T; Kuss, M; La Mura, G; Latronico, L; Longo, F; Loparco, F; Lubrano, P; Maldera, S; Malyshev, D; Manfreda, A; Mazziotta, Mn; Michelson, Pf; Mirabal, N; Mitthumsiri, W; Mizuno, T; Moiseev, Aa; Monzani, Me; Morselli, A; Moskalenko, Iv; Negro, M; Nuss, E; Orlando, E; Paneque, D; Perkins, Js; Pesce-Rollins, M; Piron, F; Pivato, G; Porter, Ta; Principe, G; Raino, S; Rando, R; Razzano, M; Reimer, A; Reimer, O; Sgro, C; Simone, D; Siskind, Ej; Spada, F; Spandre, G; Spinelli, P; Tajima, H; Thayer, Jb; Tibaldo, L; Torres, Df; Troja, E; Wood, M; Worley, A; Zaharijas, G; Zimmer, S. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 95:8(2017), pp. 082007.1-082007.16. [10.1103/PhysRevD.95.082007]