pith. sign in

arxiv: 2105.09073 · v2 · pith:4LNGHFGNnew · submitted 2021-05-19 · 🌌 astro-ph.HE · hep-ex

Measurement of the cosmic ray helium energy spectrum from 70 GeV to 80 TeV with the DAMPE space mission

F. Alemanno , Q. An , P. Azzarello , F. C. T. Barbato , P. Bernardini , X. J. Bi , M. S. Cai , E. Catanzani
show 137 more authors
J. Chang D. Y. Chen J. L. Chen Z. F. Chen M. Y. Cui T. S. Cui Y. X. Cui H. T. Dai A. D'Amone A. De Benedittis I. De Mitri F. de Palma M. Deliyergiyev M. Di Santo T. K. Dong Z. X. Dong G. Donvito D. Droz J. L. Duan K. K. Duan D. D'Urso R. R. Fan Y. Z. Fan K. Fang F. Fang C. Q. Feng L. Feng P. Fusco M. Gao F. Gargano K. Gong Y. Z. Gong D. Y. Guo J. H. Guo X. L. Guo S. X. Han Y. M. Hu G. S. Huang X. Y. Huang Y. Y. Huang M. Ionica W. Jiang J. Kong A. Kotenko D. Kyratzis S. J. Lei S. Li W. L. Li X. Li X. Q. Li Y. M. Liang C. M. Liu H. Liu J. Liu S. B. Liu W. Q. Liu Y. Liu F. Loparco C. N. Luo M. Ma P. X. Ma T. Ma X. Y. Ma G. Marsella M. N. Mazziotta D. Mo X. Y. Niu X. Pan A. Parenti W. X. Peng X. Y. Peng C. Perrina R. Qiao J. N. Rao A. Ruina M. M. Salinas G. Z. Shang W. H. Shen Z. Q. Shen Z. T. Shen L. Silveri J. X. Song M. Stolpovskiy H. Su M. Su Z. Y. Sun A. Surdo X. J. Teng A. Tykhonov H. Wang J. Z. Wang L. G. Wang S. Wang X. L. Wang Y. Wang Y. F. Wang Y. Z. Wang Z. M. Wang D. M. Wei J. J. Wei Y. F. Wei S. C. Wen D. Wu J. Wu L. B. Wu S. S. Wu X. Wu Z. Q. Xia H. T. Xu Z. H. Xu Z. L. Xu Z. Z. Xu G. F. Xue H. B. Yang P. Yang Y. Q. Yang H. J. Yao Y. H. Yu G. W. Yuan Q. Yuan C. Yue J. J. Zang F. Zhang S. X. Zhang W. Z. Zhang Y. Zhang Y. J. Zhang Y. L. Zhang Y. P. Zhang Y. Q. Zhang Z. Zhang Z. Y. Zhang C. Zhao H. Y. Zhao X. F. Zhao C. Y. Zhou Y. Zhu
This is my paper
classification 🌌 astro-ph.HE hep-ex
keywords energycosmicdampeheliumspectrummeasurementnucleiparticle
0
0 comments X
read the original abstract

The measurement of the energy spectrum of cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years of data recorded by the DArk Matter Particle Explorer (DAMPE) is reported in this work. A hardening of the spectrum is observed at an energy of about 1.3 TeV, similar to previous observations. In addition, a spectral softening at about 34 TeV is revealed for the first time with large statistics and well controlled systematic uncertainties, with an overall significance of $4.3\sigma$. The DAMPE spectral measurements of both cosmic protons and helium nuclei suggest a particle charge dependent softening energy, although with current uncertainties a dependence on the number of nucleons cannot be ruled out.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Charge-dependent spectral softenings of primary cosmic-rays below the knee

    astro-ph.HE 2025-11 conditional novelty 7.0

    Direct measurements reveal charge-dependent spectral softenings in primary cosmic rays at a common rigidity of ~15 TV, rejecting mass-dependent softening at >99.999% confidence.

  2. On the Contribution of Local Sources to the Galactic Cosmic-Ray Spectrum: An Exact Series Solution for Two-Zone Diffusion

    astro-ph.HE 2026-06 unverdicted novelty 6.0

    Derives series solution for two-zone cosmic-ray diffusion and finds local-source probability at 10 TeV rises from 0.4% to 1.7-2.2% but remains model-dependent.

  3. Transition from Diffusion to Drift-Dominated Cosmic Ray Transport and the Origin of the Knee

    astro-ph.HE 2026-06 unverdicted novelty 4.0

    Simulations show that drift dominance over diffusion can create a knee at PeV energies if parallel diffusion becomes energy-independent above 1 TeV, though some setups fail to match observed grammage.

  4. Probing Low-Luminosity Gamma-Ray Emission from SNR G296.5+10.0 and CCO 1E 1207.4-5209 with CTAO

    astro-ph.HE 2023-11 unverdicted novelty 3.0

    Numerical modeling with GALPROP predicts CTAO detectability of gamma rays from SNR G296.5+10.0 and CCO 1E 1207.4-5209 at 5 sigma after 50 hours, with hadronic processes dominating at lower energies and leptonic at higher.