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

dc.contributor.authorAharonian, F.
dc.contributor.authorBenkhali, F.A.
dc.contributor.authorAschersleben, J.
dc.contributor.authorAshkar, H.
dc.contributor.authorBackes, M.
dc.contributor.authorMartins, V.B.
dc.contributor.authorBatzofin, R.
dc.contributor.authorBecherini, Y.
dc.contributor.authorBerge, D.
dc.contributor.authorBernlöhr, K.
dc.contributor.authorBi, B.
dc.contributor.authorBöttcher, M.
dc.contributor.authorBoisson, C.
dc.contributor.authorBolmont, J.
dc.contributor.authorDe Lavergne, M.D.B.
dc.contributor.authorBorowska, J.
dc.contributor.authorBouyahiaoui, M.
dc.contributor.authorBrose, R.
dc.contributor.authorBrown, A.
dc.contributor.authorBrun, F.
dc.contributor.authoret al.
dc.date.issued2024
dc.description.abstractOwing 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.
dc.description.statementofresponsibilityH.E.S.S. Collaboration
dc.identifier.citationPhysical Review Letters, 2024; 133(22):221001-1-221001-8
dc.identifier.doi10.1103/PhysRevLett.133.221001
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.orcidEinecke, S. [0000-0001-9687-8237]
dc.identifier.urihttps://hdl.handle.net/2440/144402
dc.language.isoen
dc.publisherAmerican Physical Society (APS)
dc.relation.grantARC
dc.rights© 2024 American Physical Society
dc.source.urihttps://doi.org/10.1103/physrevlett.133.221001
dc.subjectCosmic ray composition & spectra; Cosmic rays & astroparticles; Gamma ray astronomy
dc.titleHigh-Statistics Measurement of the Cosmic-Ray Electron Spectrum with H.E.S.S.
dc.typeJournal article
pubs.publication-statusPublished

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