High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S.

H.E.S.S. Collaboration

doi:10.1103/PhysRevLett.133.221001

High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S.

H.E.S.S. Collaboration

Dublin Institute for Advanced Studies
Max-Planck-Institut für Kernphysik
Yerevan State University
University of Heidelberg
University of Groningen
University of Namibia
North-West University
c/o DESY
University of Potsdam
Astroparticule and Cosmol APC
Linnaeus University, Växjö
Humboldt-Universität zu Berlin
University of Tübingen
LUTH - Laboratoire de l'Univers et de ses Theories
Sorbonne Université
Université Paris-Saclay
University of Oxford
Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen
University of Warsaw
Institute for Nuclear Physics
University of the Witwatersrand, Johannesburg
Laboratoire Univers et Particules de Montpellier
University of Adelaide
Aix-Marseille Université
Ip Paris
University of Innsbruck
Universität Hamburg
Jagiellonian University
Nicolaus Copernicus University
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
UMR 5797
University of Southern Denmark
Yerevan Physics Institute
Konan University
University of Tokyo
University of Amsterdam

Research output: Contribution to journal › Article › peer-review

Abstract

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, covering 2 orders of magnitude in energy and reaching a proton rejection power of better than 104. The measured spectrum is well described by a broken power law, with a break around 1 TeV, where the spectral index increases from Γ1=3.25±0.02(stat)±0.2(sys) to Γ2=4.49±0.04(stat)±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.

Original language	English
Article number	221001
Journal	Physical Review Letters
Volume	133
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.133.221001
Publication status	Published - 29 Nov 2024

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10.1103/PhysRevLett.133.221001

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@article{111549f487c54646a0b78ce6a107b5b6,

title = "High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S.",

abstract = "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, covering 2 orders of magnitude in energy and reaching a proton rejection power of better than 104. The measured spectrum is well described by a broken power law, with a break around 1 TeV, where the spectral index increases from Γ1=3.25±0.02(stat)±0.2(sys) to Γ2=4.49±0.04(stat)±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.",

author = "\{H.E.S.S. Collaboration\} and F. Aharonian and Benkhali, \{F. Ait\} and J. Aschersleben and H. Ashkar and M. Backes and Martins, \{V. Barbosa\} and R. Batzofin and Y. Becherini and D. Berge and K. Bernl{\"o}hr and B. Bi and M. B{\"o}ttcher and C. Boisson and J. Bolmont and \{De Lavergne\}, \{M. De Bony\} and J. Borowska and M. Bouyahiaoui and R. Brose and A. Brown and F. Brun and B. Bruno and T. Bulik and C. Burger-Scheidlin and T. Bylund and S. Casanova and J. Celic and M. Cerruti and T. Chand and S. Chandra and A. Chen and J. Chibueze and O. Chibueze and T. Collins and G. Cotter and Mbarubucyeye, \{J. Damascene\} and J. Devin and J. Djuvsland and A. Dmytriiev and K. Egberts and S. Einecke and Ernenwein, \{J. P.\} and S. Fegan and K. Feijen and G. Fontaine and S. Funk and S. Gabici and Gallant, \{Y. A.\} and Glicenstein, \{J. F.\} and J. Glombitza and G. Grolleron",

note = "Publisher Copyright: {\textcopyright} 2024 American Physical Society.",

year = "2024",

month = nov,

day = "29",

doi = "10.1103/PhysRevLett.133.221001",

language = "English",

volume = "133",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "22",

}

TY - JOUR

T1 - High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S.

AU - H.E.S.S. Collaboration

AU - Aharonian, F.

AU - Benkhali, F. Ait

AU - Aschersleben, J.

AU - Ashkar, H.

AU - Backes, M.

AU - Martins, V. Barbosa

AU - Batzofin, R.

AU - Becherini, Y.

AU - Berge, D.

AU - Bernlöhr, K.

AU - Bi, B.

AU - Böttcher, M.

AU - Boisson, C.

AU - Bolmont, J.

AU - De Lavergne, M. De Bony

AU - Borowska, J.

AU - Bouyahiaoui, M.

AU - Brose, R.

AU - Brown, A.

AU - Brun, F.

AU - Bruno, B.

AU - Bulik, T.

AU - Burger-Scheidlin, C.

AU - Bylund, T.

AU - Casanova, S.

AU - Celic, J.

AU - Cerruti, M.

AU - Chand, T.

AU - Chandra, S.

AU - Chen, A.

AU - Chibueze, J.

AU - Chibueze, O.

AU - Collins, T.

AU - Cotter, G.

AU - Mbarubucyeye, J. Damascene

AU - Devin, J.

AU - Djuvsland, J.

AU - Dmytriiev, A.

AU - Egberts, K.

AU - Einecke, S.

AU - Ernenwein, J. P.

AU - Fegan, S.

AU - Feijen, K.

AU - Fontaine, G.

AU - Funk, S.

AU - Gabici, S.

AU - Gallant, Y. A.

AU - Glicenstein, J. F.

AU - Glombitza, J.

AU - Grolleron, G.

PY - 2024/11/29

Y1 - 2024/11/29

N2 - 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, covering 2 orders of magnitude in energy and reaching a proton rejection power of better than 104. The measured spectrum is well described by a broken power law, with a break around 1 TeV, where the spectral index increases from Γ1=3.25±0.02(stat)±0.2(sys) to Γ2=4.49±0.04(stat)±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.

AB - 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, covering 2 orders of magnitude in energy and reaching a proton rejection power of better than 104. The measured spectrum is well described by a broken power law, with a break around 1 TeV, where the spectral index increases from Γ1=3.25±0.02(stat)±0.2(sys) to Γ2=4.49±0.04(stat)±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.

U2 - 10.1103/PhysRevLett.133.221001

DO - 10.1103/PhysRevLett.133.221001

M3 - Article

AN - SCOPUS:85210773226

SN - 0031-9007

VL - 133

JO - Physical Review Letters

JF - Physical Review Letters

IS - 22

M1 - 221001

ER -

High-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S.

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