doi: 10.1103/PhysRevLett.134.191001.
Observation of a Spectral Hardening in Cosmic Ray Boron Spectrum with the DAMPE Space Mission
F Alemanno
1
2
, C Altomare
3
, Q An
4
5
, P Azzarello
6
, F C T Barbato
7
8
, P Bernardini
1
2
, X J Bi
9
10
, H Boutin
6
, I Cagnoli
7
8
, M S Cai
11
12
, E Casilli
1
2
, E Catanzani
13
, J Chang
11
12
, D Y Chen
11
, J L Chen
14
, Z F Chen
14
, Z X Chen
14
, P Coppin
6
, M Y Cui
11
, T S Cui
15
, Y X Cui
11
12
, I De Mitri
7
8
, F de Palma
1
2
, A Di Giovanni
7
8
, T K Dong
11
, Z X Dong
15
, G Donvito
3
, D Droz
6
, J L Duan
14
, K K Duan
11
, R R Fan
9
, Y Z Fan
11
12
, F Fang
14
, K Fang
9
, C Q Feng
4
5
, L Feng
11
12
, J M Frieden
6
, P Fusco
3
16
, M Gao
9
, F Gargano
3
, E Ghose
1
2
, K Gong
9
, Y Z Gong
11
, D Y Guo
9
, J H Guo
11
12
, S X Han
15
, Y M Hu
11
, G S Huang
4
5
, X Y Huang
11
12
, Y Y Huang
11
, M Ionica
13
, L Y Jiang
11
, Y Z Jiang
13
, W Jiang
11
, J Kong
14
, A Kotenko
6
, D Kyratzis
7
8
, S J Lei
11
, W H Li
11
12
, W L Li
15
, X Li
11
, X Q Li
15
, Y M Liang
15
, C M Liu
13
, H Liu
11
, J Liu
14
, S B Liu
4
5
, Y Liu
11
, F Loparco
3
16
, M Ma
15
, P X Ma
11
, T Ma
11
, X Y Ma
15
, G Marsella
1
2
, M N Mazziotta
3
, D Mo
14
, X Y Niu
14
, A Parenti
7
8
, W X Peng
9
, X Y Peng
11
, C Perrina
6
, E Putti-Garcia
6
, R Qiao
9
, J N Rao
15
, R Sarkar
7
8
, P Savina
7
8
, A Serpolla
6
, Z Shangguan
15
, W H Shen
15
, Z Q Shen
11
, Z T Shen
4
5
, L Silveri
7
8
, J X Song
15
, M Stolpovskiy
6
, H Su
14
, M Su
17
, H R Sun
4
5
, Z Y Sun
14
, A Surdo
2
, X J Teng
15
, A Tykhonov
6
, J Z Wang
9
, L G Wang
15
, S Wang
11
, X L Wang
4
5
, Y F Wang
4
5
, Y Wang
4
5
, D M Wei
11
12
, J J Wei
11
, Y F Wei
4
5
, D Wu
9
, J Wu
11
12
, S S Wu
15
, X Wu
6
, Z Q Xia
11
, E H Xu
4
5
, H T Xu
15
, J Xu
11
, Z H Xu
14
, Z L Xu
11
, Z Z Xu
4
5
, G F Xue
15
, H B Yang
14
, P Yang
14
, Y Q Yang
14
, H J Yao
14
, Y H Yu
14
, Q Yuan
11
12
, C Yue
11
, J J Zang
11
, S X Zhang
14
, W Z Zhang
15
, Yan Zhang
11
, Yi Zhang
11
12
, Y J Zhang
14
, Y L Zhang
4
5
, Y P Zhang
14
, Y Q Zhang
11
, Z Zhang
11
, Z Y Zhang
4
5
, C Zhao
4
5
, H Y Zhao
14
, X F Zhao
15
, C Y Zhou
15
, Y Zhu
15
; DAMPE Collaboration
Affiliations
Affiliations
- 1 Dipartimento di Matematica e Fisica E. De Giorgi, Università del Salento, I-73100 Lecce, Italy.
- 2 Istituto Nazionale di Fisica Nucleare (INFN) - Sezione di Lecce, I-73100 Lecce, Italy.
- 3 Istituto Nazionale di Fisica Nucleare (INFN) - Sezione di Bari, I-70125 Bari, Italy.
- 4 State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China.
- 5 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
- 6 Department of Nuclear and Particle Physics, University of Geneva, CH-1211 Geneva, Switzerland.
- 7 Gran Sasso Science Institute (GSSI), Via Iacobucci 2, I-67100 L'Aquila, Italy.
- 8 Istituto Nazionale di Fisica Nucleare (INFN) - Laboratori Nazionali del Gran Sasso, I-67100 Assergi, L'Aquila, Italy.
- 9 Chinese Academy of Sciences, Institute of High Energy Physics, Yuquan Road 19B, Beijing 100049, China.
- 10 University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China.
- 11 Chinese Academy of Sciences, Purple Mountain Observatory, Key Laboratory of Dark Matter and Space Astronomy, Nanjing 210023, China.
- 12 School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China.
- 13 Istituto Nazionale di Fisica Nucleare (INFN) - Sezione di Perugia, I-06123 Perugia, Italy.
- 14 Chinese Academy of Sciences, Institute of Modern Physics, Nanchang Road 509, Lanzhou 730000, China.
- 15 Chinese Academy of Sciences, National Space Science Center, Nanertiao 1, Zhongguancun, Haidian district, Beijing 100190, China.
- 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, China.
- PMID: 40446253
- DOI: 10.1103/PhysRevLett.134.191001
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Observation of a Spectral Hardening in Cosmic Ray Boron Spectrum with the DAMPE Space Mission
F Alemanno et al.
Phys Rev Lett.
.
Display options
Format
doi: 10.1103/PhysRevLett.134.191001.
Authors
F Alemanno
1
2
, C Altomare
3
, Q An
4
5
, P Azzarello
6
, F C T Barbato
7
8
, P Bernardini
1
2
, X J Bi
9
10
, H Boutin
6
, I Cagnoli
7
8
, M S Cai
11
12
, E Casilli
1
2
, E Catanzani
13
, J Chang
11
12
, D Y Chen
11
, J L Chen
14
, Z F Chen
14
, Z X Chen
14
, P Coppin
6
, M Y Cui
11
, T S Cui
15
, Y X Cui
11
12
, I De Mitri
7
8
, F de Palma
1
2
, A Di Giovanni
7
8
, T K Dong
11
, Z X Dong
15
, G Donvito
3
, D Droz
6
, J L Duan
14
, K K Duan
11
, R R Fan
9
, Y Z Fan
11
12
, F Fang
14
, K Fang
9
, C Q Feng
4
5
, L Feng
11
12
, J M Frieden
6
, P Fusco
3
16
, M Gao
9
, F Gargano
3
, E Ghose
1
2
, K Gong
9
, Y Z Gong
11
, D Y Guo
9
, J H Guo
11
12
, S X Han
15
, Y M Hu
11
, G S Huang
4
5
, X Y Huang
11
12
, Y Y Huang
11
, M Ionica
13
, L Y Jiang
11
, Y Z Jiang
13
, W Jiang
11
, J Kong
14
, A Kotenko
6
, D Kyratzis
7
8
, S J Lei
11
, W H Li
11
12
, W L Li
15
, X Li
11
, X Q Li
15
, Y M Liang
15
, C M Liu
13
, H Liu
11
, J Liu
14
, S B Liu
4
5
, Y Liu
11
, F Loparco
3
16
, M Ma
15
, P X Ma
11
, T Ma
11
, X Y Ma
15
, G Marsella
1
2
, M N Mazziotta
3
, D Mo
14
, X Y Niu
14
, A Parenti
7
8
, W X Peng
9
, X Y Peng
11
, C Perrina
6
, E Putti-Garcia
6
, R Qiao
9
, J N Rao
15
, R Sarkar
7
8
, P Savina
7
8
, A Serpolla
6
, Z Shangguan
15
, W H Shen
15
, Z Q Shen
11
, Z T Shen
4
5
, L Silveri
7
8
, J X Song
15
, M Stolpovskiy
6
, H Su
14
, M Su
17
, H R Sun
4
5
, Z Y Sun
14
, A Surdo
2
, X J Teng
15
, A Tykhonov
6
, J Z Wang
9
, L G Wang
15
, S Wang
11
, X L Wang
4
5
, Y F Wang
4
5
, Y Wang
4
5
, D M Wei
11
12
, J J Wei
11
, Y F Wei
4
5
, D Wu
9
, J Wu
11
12
, S S Wu
15
, X Wu
6
, Z Q Xia
11
, E H Xu
4
5
, H T Xu
15
, J Xu
11
, Z H Xu
14
, Z L Xu
11
, Z Z Xu
4
5
, G F Xue
15
, H B Yang
14
, P Yang
14
, Y Q Yang
14
, H J Yao
14
, Y H Yu
14
, Q Yuan
11
12
, C Yue
11
, J J Zang
11
, S X Zhang
14
, W Z Zhang
15
, Yan Zhang
11
, Yi Zhang
11
12
, Y J Zhang
14
, Y L Zhang
4
5
, Y P Zhang
14
, Y Q Zhang
11
, Z Zhang
11
, Z Y Zhang
4
5
, C Zhao
4
5
, H Y Zhao
14
, X F Zhao
15
, C Y Zhou
15
, Y Zhu
15
; DAMPE Collaboration
Affiliations
- 1 Dipartimento di Matematica e Fisica E. De Giorgi, Università del Salento, I-73100 Lecce, Italy.
- 2 Istituto Nazionale di Fisica Nucleare (INFN) - Sezione di Lecce, I-73100 Lecce, Italy.
- 3 Istituto Nazionale di Fisica Nucleare (INFN) - Sezione di Bari, I-70125 Bari, Italy.
- 4 State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China.
- 5 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
- 6 Department of Nuclear and Particle Physics, University of Geneva, CH-1211 Geneva, Switzerland.
- 7 Gran Sasso Science Institute (GSSI), Via Iacobucci 2, I-67100 L'Aquila, Italy.
- 8 Istituto Nazionale di Fisica Nucleare (INFN) - Laboratori Nazionali del Gran Sasso, I-67100 Assergi, L'Aquila, Italy.
- 9 Chinese Academy of Sciences, Institute of High Energy Physics, Yuquan Road 19B, Beijing 100049, China.
- 10 University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China.
- 11 Chinese Academy of Sciences, Purple Mountain Observatory, Key Laboratory of Dark Matter and Space Astronomy, Nanjing 210023, China.
- 12 School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China.
- 13 Istituto Nazionale di Fisica Nucleare (INFN) - Sezione di Perugia, I-06123 Perugia, Italy.
- 14 Chinese Academy of Sciences, Institute of Modern Physics, Nanchang Road 509, Lanzhou 730000, China.
- 15 Chinese Academy of Sciences, National Space Science Center, Nanertiao 1, Zhongguancun, Haidian district, Beijing 100190, China.
- 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, China.
- PMID: 40446253
- DOI: 10.1103/PhysRevLett.134.191001
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Abstract
Secondary cosmic ray fluxes are important probes of the propagation and interaction of high-energy particles in the Galaxy. Recent measurements of primary and secondary cosmic ray nuclei have revealed unexpected spectral features that demand a deeper understanding. In this work we report the direct measurement of the cosmic ray boron spectrum from 10 GeV/n to 8 TeV/n with eight years of data collected by the Dark Matter Particle Explorer (DAMPE) mission. The measured spectrum shows a hardening at 182±24 GeV/n with a spectral index of γ_{1}=3.02±0.01 before the break and an index change of Δγ=0.31±0.05 after the break. A simple power law model is disfavored at a confidence level of 8σ. Compared with the hardenings measured in the DAMPE proton and helium spectra, the secondary boron spectrum hardens roughly twice as much as these primaries, which is consistent with a propagation related mechanism to interpret the spectral hardenings of cosmic rays observed at hundreds of GeV/n.