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Hadronic cross section measurements with the DAMPE space mission using 20GeV-10TeV cosmic-ray protons and ⁴He

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arxiv 2408.17224 v2 pith:Q25Y5SIR submitted 2024-08-30 hep-ex

Hadronic cross section measurements with the DAMPE space mission using 20GeV-10TeV cosmic-ray protons and ⁴He

F. Alemanno , Q. An , P. Azzarello , F. C. T. Barbato , P. Bernardini , X. J. Bi , I. Cagnoli , M. S. Cai
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E. Casilli E. Catanzani J. Chang D. Y. Chen J. L. Chen Z. F. Chen P. Coppin M. Y. Cui T. S. Cui Y. X. Cui H. T. Dai A. De Benedittis I. De Mitri F. de Palma A. Di Giovanni Q. Ding T. K. Dong Z. X. Dong G. Donvito D. Droz J. L. Duan K. K. Duan R. R. Fan Y. Z. Fan F. Fang K. Fang C. Q. Feng L. Feng J. M. Frieden P. Fusco M. Gao F. Gargano K. Gong Y. Z. Gong D. Y. Guo J. H. Guo S. X. Han Y. M. Hu G. S. Huang X. Y. Huang Y. Y. Huang M. Ionica L. Y. Jiang Y. Z. Jiang W. Jiang J. Kong A. Kotenko D. Kyratzis S. J. Lei W. H. Li W. L. Li X. Li X. Q. Li Y. M. Liang C. M. Liu H. Liu J. Liu S. B. 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 E. Putti-Garcia R. Qiao J. N. Rao A. Ruina R. Sarkar P. Savina A. Serpolla Z. Shangguan W. H. Shen Z. Q. Shen Z. T. Shen L. Silveri J. X. Song M. Stolpovskiy H. Su M. Su H. R. Sun Z. Y. Sun A. Surdo X. J. Teng A. Tykhonov J. Z. Wang L. G. Wang S. Wang S. X. Wang X. L. Wang Y. Wang Y. F. Wang Y. Z. Wang Z. M. Wang D. M. Wei J. J. Wei Y. F. Wei D. Wu J. Wu S. S. Wu X. Wu Z. Q. Xia H. T. Xu J. Xu Z. H. Xu Z. L. Xu E. H. 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 S. X. Zhang W. Z. Zhang Yan Zhang Yi 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
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classification hep-ex
keywords crossmeasurementshelium-4protonssectioncosmic-raydampeflux
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Precise direct cosmic-ray (CR) measurements provide an important probe to study the energetic particle sources in our Galaxy, and the interstellar environment through which these particles propagate. Uncertainties on hadronic models, ion-nucleon cross sections in particular, are currently the limiting factor towards obtaining more accurate CR ion flux measurements with calorimetric space-based experiments. We present an energy-dependent measurement of the inelastic cross section of protons and helium-4 nuclei (alpha particles) on a Bi$_4$Ge$_3$O$_{12}$ target, using 88 months of data collected by the DAMPE space mission. The kinetic energy range per nucleon of the measurement points ranges from 18 GeV to 9 TeV for protons, and from 5 GeV/n to 3 TeV/n for helium-4 nuclei. Our results lead to a significant improvement of the CR flux normalisation. In the case of helium-4, these results correspond to the first cross section measurements on a heavy target material at energies above 10 GeV/n.

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