Measurement of the cosmic p+He energy spectrum from 50 GeV to 0.5 PeV with the DAMPE space mission

Alemanno, F.; Altomare, C.; An, Q.; Azzarello, P.; Barbato, F.  c.  t.; Bernardini, P.; X.  j., Bi; Cagnoli, I.; Cai, M.  s.; Casilli, E.; Catanzani, E.; Chang, J.; Chen, D.  y.; Chen, J.  l.; Chen, Z.  f.; Coppin, P.; Cui, M.  y.; Cui, T.  s.; Cui, Y.  x.; Dai, H.  t.; De Benedittis, A.; De Mitri, I.; De Palma, F.; Deliyergiyev, M.; Di Giovanni, A.; Di Santo, M.; Ding, Q.; Dong, T.  k.; Dong, Z.  x.; Donvito, G.; Droz, D.; Duan, J.  l.; Duan, K.  k.; Fan, R.  r.; Fan, Y.  z.; Fang, F.; Fang, K.; Feng, C.  q.; Feng, L.; Alonso, M. Fernandez; Frieden, J.  m.; Fusco, P.; Gao, M.; Gargano, F.; Gong, K.; Gong, Y.  z.; Guo, D.  y.; Guo, J.  h.; Han, S.  x.; Y.  m., Hu; Huang, G.  s.; Huang, X.  y.; Huang, Y.  y.; Ionica, M.; Jiang, L.  y.; Jiang, Y.  z.; Jiang, W.; Kong, J.; Kotenko, A.; Kyratzis, D.; Lei, S.  j.; W.  h., Li; W.  l., Li; Li, X.; X.  q., Li; Liang, Y.  m.; Liu, C.  m.; Liu, H.; Liu, J.; Liu, S.  b.; Liu, Y.; Loparco, F.; Luo, C.  n.; Ma, M.; P.  x., Ma; Ma, T.; X.  y., Ma; Marsella, G.; Mazziotta, M.  n.; Mo, D.; Salinas, M. Muoz; Niu, X.  y.; Pan, X.; Parenti, A.; Peng, W.  x.; Peng, X.  y.; Perrina, C.; Putti-Garcia, E.; Qiao, R.; Rao, J.  n.; Ruina, A.; Shangguan, Z.; Shen, W.  h.; Shen, Z.  q.; Shen, Z.  t.; Silveri, L.; Song, J.  x.; Stolpovskiy, M.; Su, H.; Su, M.; Sun, H.  r.; Sun, Z.  y.; Surdo, A.; Teng, X.  j.; Tykhonov, A.; Wang, J.  z.; Wang, L.  g.; Wang, S.; Wang, S.  x.; Wang, X.  l.; Wang, Y.; Wang, Y.  f.; Wang, Y.  z.; Wang, Z.  m.; Wei, D.  m.; Wei, J.  j.; Wei, Y.  f.; Wu, D.; Wu, J.; L.  b., Wu; S.  s., Wu; Wu, X.; Xia, Z.  q.; H.  t., Xu; Xu, J.; Z.  h., Xu; Z.  l., Xu; E.  h., Xu; Z.  z., Xu; Xue, G.  f.; Yang, H.  b.; Yang, P.; Yang, Y.  q.; Yao, H.  j.; Y.  h., Yu; Yuan, G.  w.; Yuan, Q.; Yue, C.; Zang, J.  j.; Zhang, 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.; Zhao, C.; Zhao, H.  y.; Zhao, X.  f.; Zhou, C.  y.; Zhu, Y.; Null, Null

doi:10.1103/physrevd.109.l121101

Recent observations of the light component of the cosmic-ray spectrum have revealed unexpected features that motivate further and more precise measurements up to the highest energies. The Dark Matter Particle Explorer is a satellite-based cosmic-ray experiment that has been operational since December 2015, continuously collecting data on high-energy cosmic particles with very good statistics, energy resolution, and particle identification capabilities. In this work, the latest measurements of the energy spectrum of proton+helium in the energy range from 46 GeV to 464 TeV are presented. Among the most distinctive features of the spectrum, a spectral hardening at 600 GeV has been observed, along with a softening at 29 TeV measured with a 6.6σ significance. Moreover, the detector features and the analysis approach allowed for the extension of the spectral measurement up to the sub-PeV region. Even if with small statistical significance due to the low number of events, data suggest a new spectral hardening at about 150 TeV.

Measurement of the cosmic p+He energy spectrum from 50 GeV to 0.5 PeV with the DAMPE space mission

Alemanno, F.;Altomare, C.;An, Q.;Azzarello, P.;Barbato, F. C. T.;Bernardini, P.;Bi, X. J.;Cagnoli, I.;Cai, M. S.;Casilli, E.;Catanzani, E.;Chang, J.;Chen, D. Y.;Chen, J. L.;Chen, Z. F.;Coppin, P.;Cui, M. Y.;Cui, T. S.;Cui, Y. X.;Dai, H. T.;De Benedittis, A.;De Mitri, I.;de Palma, F.;Deliyergiyev, M.;Di Giovanni, A.;Di Santo, M.;Ding, Q.;Dong, T. K.;Dong, Z. X.;Donvito, G.;Droz, D.;Duan, J. L.;Duan, K. K.;Fan, R. R.;Fan, Y. Z.;Fang, F.;Fang, K.;Feng, C. Q.;Feng, L.;Alonso, M. Fernandez;Frieden, J. M.;Fusco, P.;Gao, M.;Gargano, F.;Gong, K.;Gong, Y. Z.;Guo, D. Y.;Guo, J. H.;Han, S. X.;Hu, Y. M.;Huang, G. S.;Huang, X. Y.;Huang, Y. Y.;Ionica, M.;Jiang, L. Y.;Jiang, Y. Z.;Jiang, W.;Kong, J.;Kotenko, A.;Kyratzis, D.;Lei, S. J.;Li, W. H.;Li, W. L.;Li, X.;Li, X. Q.;Liang, Y. M.;Liu, C. M.;Liu, H.;Liu, J.;Liu, S. B.;Liu, Y.;Loparco, F.;Luo, C. N.;Ma, M.;Ma, P. X.;Ma, T.;Ma, X. Y.;Marsella, G.;Mazziotta, M. N.;Mo, D.;Salinas, M. Muoz;Niu, X. Y.;Pan, X.;Parenti, A.;Peng, W. X.;Peng, X. Y.;Perrina, C.;Putti-Garcia, E.;Qiao, R.;Rao, J. N.;Ruina, A.;Shangguan, Z.;Shen, W. H.;Shen, Z. Q.;Shen, Z. T.;Silveri, L.;Song, J. X.;Stolpovskiy, M.;Su, H.;Su, M.;Sun, H. R.;Sun, Z. Y.;Surdo, A.;Teng, X. J.;Tykhonov, A.;Wang, J. Z.;Wang, L. G.;Wang, S.;Wang, S. X.;Wang, X. L.;Wang, Y.;Wang, Y. F.;Wang, Y. Z.;Wang, Z. M.;Wei, D. M.;Wei, J. J.;Wei, Y. F.;Wu, D.;Wu, J.;Wu, L. B.;Wu, S. S.;Wu, X.;Xia, Z. Q.;Xu, H. T.;Xu, J.;Xu, Z. H.;Xu, Z. L.;Xu, E. H.;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, 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.;Zhao, C.;Zhao, H. Y.;Zhao, X. F.;Zhou, C. Y.;Zhu, Y.;null, null

2024-01-01

Abstract

Recent observations of the light component of the cosmic-ray spectrum have revealed unexpected features that motivate further and more precise measurements up to the highest energies. The Dark Matter Particle Explorer is a satellite-based cosmic-ray experiment that has been operational since December 2015, continuously collecting data on high-energy cosmic particles with very good statistics, energy resolution, and particle identification capabilities. In this work, the latest measurements of the energy spectrum of proton+helium in the energy range from 46 GeV to 464 TeV are presented. Among the most distinctive features of the spectrum, a spectral hardening at 600 GeV has been observed, along with a softening at 29 TeV measured with a 6.6σ significance. Moreover, the detector features and the analysis approach allowed for the extension of the spectral measurement up to the sub-PeV region. Even if with small statistical significance due to the low number of events, data suggest a new spectral hardening at about 150 TeV.

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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/542582

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Measurement of the cosmic p+He energy spectrum from 50 GeV to 0.5 PeV with the DAMPE space mission

2024-01-01

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