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Alemanno F, An Q, Azzarello P, et al. Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission. Phys Rev Lett. 2021;126(20):201102doi: 10.1103/PhysRevLett.126.201102.
Alemanno, F., An, Q., Azzarello, P., Barbato, F. C. T., Bernardini, P., Bi, X. J., Cai, M. S., Catanzani, E., Chang, J., Chen, D. Y., Chen, J. L., Chen, Z. F., Cui, M. Y., Cui, T. S., Cui, Y. X., Dai, H. T., D'Amone, A., De Benedittis, A., De Mitri, I., de Palma, F., Deliyergiyev, M., Di Santo, M., Dong, T. K., Dong, Z. X., Donvito, G., Droz, D., Duan, J. L., Duan, K. K., D'Urso, D., Fan, R. R., Fan, Y. Z., Fang, K., Fang, F., Feng, C. Q., Feng, L., Fusco, P., Gao, M., Gargano, F., Gong, K., Gong, Y. Z., Guo, D. Y., Guo, J. H., Guo, X. L., Han, S. X., Hu, Y. M., Huang, G. S., Huang, X. Y., Huang, Y. Y., Ionica, M., Jiang, W., Kong, J., Kotenko, A., Kyratzis, D., Lei, S. J., Li, S., Li, W. L., Li, X., Li, X. Q., Liang, Y. M., Liu, C. M., Liu, H., Liu, J., Liu, S. B., Liu, W. Q., Liu, Y., Loparco, F., Luo, C. N., Ma, M., Ma, P. X., Ma, T., Ma, X. Y., Marsella, G., Mazziotta, M. N., Mo, D., Niu, X. Y., Pan, X., Parenti, A., Peng, W. X., Peng, X. Y., Perrina, C., Qiao, R., Rao, J. N., Ruina, A., Salinas, M. M., Shang, G. Z., Shen, W. H., Shen, Z. Q., Shen, Z. T., Silveri, L., Song, J. X., Stolpovskiy, M., Su, H., Su, M., Sun, Z. Y., Surdo, A., Teng, X. J., Tykhonov, A., Wang, H., Wang, J. Z., Wang, L. G., Wang, S., Wang, X. L., Wang, Y., Wang, Y. F., Wang, Y. Z., Wang, Z. M., Wei, D. M., Wei, J. J., Wei, Y. F., Wen, S. C., Wu, D., Wu, J., Wu, L. B., Wu, S. S., Wu, X., Xia, Z. Q., Xu, H. T., Xu, Z. H., Xu, Z. L., Xu, Z. Z., Xue, G. F., Yang, H. B., Yang, P., Yang, Y. Q., Yao, H. J., Yu, Y. H., Yuan, G. W., Yuan, Q., Yue, C., Zang, J. J., Zhang, 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., Zhao, C., Zhao, H. Y., Zhao, X. F., Zhou, C. Y., Zhu, Y. (2021). Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission. Physical review letters, 126(20), 201102. https://doi.org/10.1103/PhysRevLett.126.201102
Alemanno, F, et al. "Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission." Physical review letters vol. 126,20 (2021): 201102. doi: https://doi.org/10.1103/PhysRevLett.126.201102
Alemanno F, An Q, Azzarello P, Barbato FCT, Bernardini P, Bi XJ, Cai MS, Catanzani E, Chang J, Chen DY, Chen JL, Chen ZF, Cui MY, Cui TS, Cui YX, Dai HT, D'Amone A, De Benedittis A, De Mitri I, de Palma F, Deliyergiyev M, Di Santo M, Dong TK, Dong ZX, Donvito G, Droz D, Duan JL, Duan KK, D'Urso D, Fan RR, Fan YZ, Fang K, Fang F, Feng CQ, Feng L, Fusco P, Gao M, Gargano F, Gong K, Gong YZ, Guo DY, Guo JH, Guo XL, Han SX, Hu YM, Huang GS, Huang XY, Huang YY, Ionica M, Jiang W, Kong J, Kotenko A, Kyratzis D, Lei SJ, Li S, Li WL, Li X, Li XQ, Liang YM, Liu CM, Liu H, Liu J, Liu SB, Liu WQ, Liu Y, Loparco F, Luo CN, Ma M, Ma PX, Ma T, Ma XY, Marsella G, Mazziotta MN, Mo D, Niu XY, Pan X, Parenti A, Peng WX, Peng XY, Perrina C, Qiao R, Rao JN, Ruina A, Salinas MM, Shang GZ, Shen WH, Shen ZQ, Shen ZT, Silveri L, Song JX, Stolpovskiy M, Su H, Su M, Sun ZY, Surdo A, Teng XJ, Tykhonov A, Wang H, Wang JZ, Wang LG, Wang S, Wang XL, Wang Y, Wang YF, Wang YZ, Wang ZM, Wei DM, Wei JJ, Wei YF, Wen SC, Wu D, Wu J, Wu LB, Wu SS, Wu X, Xia ZQ, Xu HT, Xu ZH, Xu ZL, Xu ZZ, Xue GF, Yang HB, Yang P, Yang YQ, Yao HJ, Yu YH, Yuan GW, Yuan Q, Yue C, Zang JJ, Zhang F, Zhang SX, Zhang WZ, Zhang Y, Zhang YJ, Zhang YL, Zhang YP, Zhang YQ, Zhang Z, Zhang ZY, Zhao C, Zhao HY, Zhao XF, Zhou CY, Zhu Y. Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission. Phys Rev Lett. 2021 May 21;126(20):201102. doi: 10.1103/PhysRevLett.126.201102. PMID: 34110215.
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Phys Rev Lett. 2021 May 21;126(20):201102. doi: 10.1103/PhysRevLett.126.201102.

Measurement of the Cosmic Ray Helium Energy Spectrum from 70 GeV to 80 TeV with the DAMPE Space Mission.

Physical review letters

F Alemanno, Q An, P Azzarello, F C T Barbato, P Bernardini, X J Bi, M S Cai, E Catanzani, 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,

Affiliations

  1. Gran Sasso Science Institute (GSSI), Via Iacobucci 2, I-67100 L'Aquila, Italy.
  2. Istituto Nazionale di Fisica Nucleare (INFN)-Laboratori Nazionali del Gran Sasso, I-67100 Assergi, L'Aquila, Italy.
  3. State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China.
  4. Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
  5. Department of Nuclear and Particle Physics, University of Geneva, CH-1211 Geneva, Switzerland.
  6. Dipartimento di Matematica e Fisica E. De Giorgi, Università del Salento, I-73100 Lecce, Italy.
  7. Istituto Nazionale di Fisica Nucleare (INFN)-Sezione di Lecce, I-73100 Lecce, Italy.
  8. Institute of High Energy Physics, Chinese Academy of Sciences, Yuquan Road 19B, Beijing 100049, China.
  9. University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China.
  10. Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China.
  11. School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China.
  12. Istituto Nazionale di Fisica Nucleare (INFN)-Sezione di Perugia, I-06123 Perugia, Italy.
  13. Institute of Modern Physics, Chinese Academy of Sciences, Nanchang Road 509, Lanzhou 730000, China.
  14. National Space Science Center, Chinese Academy of Sciences, Nanertiao 1, Zhongguancun, Haidian district, Beijing 100190, China.
  15. Istituto Nazionale di Fisica Nucleare (INFN)-Sezione di Bari, I-70125 Bari, Italy.
  16. Dipartimento di Fisica "M. Merlin" dell'Università e del Politecnico di Bari, I-70126 Bari, Italy.
  17. Department of Physics and Laboratory for Space Research, the University of Hong Kong, Pok Fu Lam, Hong Kong SAR 999077, China.

PMID: 34110215 DOI: 10.1103/PhysRevLett.126.201102

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 4.3σ. 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.

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