High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S
Creators: name: Aharonian, F.
name: Benkhali, F. Ait
name: Aschersleben, J.
name: Ashkar, H.
name: Backes, M.
name: Martins, V. Barbosa
name: Batzofin, R.
name: Becherini, Y.
name: Berge, D.
name: Bernlöhr, K.
name: Bi, B.
name: Böttcher, M.
name: Boisson, C.
name: Bolmont, J.
name: de Lavergne, M. de Bony
name: Borowska, J.
name: Bouyahiaoui, M.
name: Brose, R.
name: Brown, A.
name: Brun, F.
name: Bruno, B.
name: Bulik, T.
name: Burger-Scheidlin, C.
name: Bylund, T.
name: Casanova, S.
name: Celic, J.
name: Cerruti, M.
name: Chand, T.
name: Chandra, S.
name: Chen, A.
name: Chibueze, J.
name: Chibueze, O.
name: Collins, T.
name: Cotter, G.
name: Mbarubucyeye, J. Damascene
name: Devin, J.
name: Djuvsland, J.
name: Dmytriiev, A.
name: Egberts, K.
name: Einecke, S.
name: Ernenwein, J. -P.
name: Fegan, S.
name: Feijen, K.
name: Fontaine, G.
name: Funk, S.
name: Gabici, S.
name: Gallant, Y. A.
name: Glicenstein, J. F.
name: Glombitza, J.
name: Grolleron, G.
name: Heß, B.
name: Hofmann, W.
name: Holch, T. L.
name: Holler, M.
name: Horns, D.
name: Huang, Zhiqiu
name: Jamrozy, M.
name: Jankowsky, F.
name: Joshi, V.
name: Jung-Richardt, I.
name: Kasai, E.
name: Katarzynski, K.
name: Kerszberg, D.
name: Khatoon, R.
name: Khelifi, B.
name: Kluzniak, W.
name: Komin, Nu.
name: Kosack, K.
name: Kostunin, D.
name: Kundu, A.
name: Lang, R. G.
name: Stum, S. Le
name: Leitl, F.
name: Lemiere, A.
name: Lemoine-Goumard, M.
name: Lenain, J. -P.
name: Leuschner, F.
name: Luashvili, A.
name: Mackey, J.
name: Malyshev, D.
name: Malyshev, D.
name: Marandon, V.
name: Marinos, P.
name: Marti-Devesa, G.
name: Marx, R.
name: Meyer, M.
name: Mitchell, A.
name: Moderski, R.
name: Moghadam, M. O.
name: Mohrmann, L.
name: Montanari, A.
name: Moulin, E.
name: de Naurois, M.
name: Niemiec, J.
name: Ohm, S.
name: Olivera-Nieto, L.
name: Wilhelmi, E. de Ona
name: Ostrowski, M.
name: Panny, S.
name: Panter, M.
name: Parsons, D.
name: Pensec, U.
name: Peron, G.
name: Pühlhofer, G.
name: Punch, M.
name: Quirrenbach, A.
name: Ravikularaman, S.
name: Regeard, M.
name: Reimer, A.
name: Reimer, O.
name: Reis, I.
name: Ren, H.
name: Reville, B.
name: Rieger, F.
name: Rowell, G.
name: Rudak, B.
name: Ruiz-Velasco, E.
name: Sahakian, V.
name: Salzmann, H.
name: Santangelo, A.
name: Sasaki, M.
name: Schäfer, J.
name: Schüssler, F.
name: Schutte, H. M.
name: Shapopi, J. N. S.
name: Sharma, A.
name: Sol, H.
name: Spencer, S.
name: Stawarz, L.
name: Steinmassl, S.
name: Steppa, C.
name: Suzuki, H.
name: Takahashi, T.
name: Tanaka, T.
name: Taylor, A. M.
name: Terrier, R.
name: Tsirou, M.
name: van Eldik, C.
name: Vecchi, M.
name: Venter, C.
name: Vink, J.
name: Wach, T.
name: Wagner, S. J.
name: Wierzcholska, A.
name: Zacharias, M.
name: Zdziarski, A. A.
name: Zech, A.
name: Zywucka, N.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: Owing to their rapid cooling rate and hence loss-limited propagation distance, cosmic-ray electrons and positrons (CRe) at very high energies probe local cosmic-ray accelerators and provide constraints on exotic production mechanisms such as annihilation of dark matter particles. We present a high-statistics measurement of the spectrum of CRe candidate events from 0.3 to 40 TeV with the High Energy Stereoscopic System (H.E.S.S.), covering two orders of magnitude in energy and reaching a proton rejection power of better than $10^{4}$. The measured spectrum is well described by a broken power law, with a break around 1 TeV, where the spectral index increases from $Γ_1 = 3.25$ $\pm$ 0.02 (stat) $\pm$ 0.2 (sys) to $Γ_2 = 4.49$ $\pm$ 0.04 (stat) $\pm$ 0.2 (sys). Apart from the break, the spectrum is featureless. The absence of distinct signatures at multi-TeV energies imposes constraints on the presence of nearby CRe accelerators and the local CRe propagation mechanisms.
description: main paper: 8 pages, 4 figures, supplemental material: 12 pages, 14 figures, accepted for publication in Physical Review Letters https://journals.aps.org/prl/