Cosmic ray propagation and dark matter in light of the latest AMS02 data
Abstract
The AMS02 experiment is measuring the high energy cosmic rays with unprecedented accuracy. We explore the possibility of determining the cosmicray propagation models using the AMS02 data alone. A global Bayesian analysis of the constraints on the cosmicray propagation models from the preliminary AMS02 data on the Boron to Carbon nuclei flux ratio and proton flux is performed, with the assumption that the primary nucleon source is a broken power law in rigidity. The ratio of the diffusion coefficient D{sub 0} to the diffusive halo height Z{sub h} is determined with high accuracy D{sub 0}/Z{sub h}≃2.00±0.07 cm{sup 2}s{sup −1}kpc{sup −1}, and the value of the halo width is found to be Z{sub h}≃3.3 kpc with uncertainty less than 50%. As a consequence, the typical uncertainties in the positron fraction predicted from dark matter (DM) annihilation is reduced to a factor of two, and that in the antiproton flux is about an order of magnitude. Both of them are significantly smaller than that from the analyses prior to AMS02. Taking into account the uncertainties and correlations in the propagation parameters, we derive conservative upper limits on the cross sections for DM annihilating into various standard model final states from the currentmore »
 Authors:
 State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics,Chinese Academy of Sciences, Zhong Guan Cun East Street 55 #, P.O. Box 2735,Beijing, 100190 P.R. (China)
 (China)
 Publication Date:
 Sponsoring Org.:
 SCOAP3, CERN, Geneva (Switzerland)
 OSTI Identifier:
 22458380
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 09; Other Information: PUBLISHERID: JCAP09(2015)049; OAI: oai:repo.scoap3.org:11907; Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; ANNIHILATION; ANTIPROTONS; BORON; CARBON; COSMIC RADIATION; COSMIC RAY PROPAGATION; CROSS SECTIONS; DIFFUSION; ELEMENTARY PARTICLES; GEV RANGE; LIMITING VALUES; NONLUMINOUS MATTER; STANDARD MODEL
Citation Formats
Jin, HongBo, National Astronomical Observatories, Chinese Academy of Sciences,Datun Rd, Chaoyang, Beijing, Wu, YueLiang, Kavli Institute for Theoretical Physics China, Institute of Theoretical Physics,Chinese Academy of Sciences, Zhong Guan Cun East Street 55 #, P.O. Box 2735,Beijing, 100190 P.R., University of Chinese Academy of Sciences,Beijing, 100190 P.R., Zhou, YuFeng, and Kavli Institute for Theoretical Physics China, Institute of Theoretical Physics,Chinese Academy of Sciences, Zhong Guan Cun East Street 55 #, P.O. Box 2735,Beijing, 100190 P.R.. Cosmic ray propagation and dark matter in light of the latest AMS02 data. United States: N. p., 2015.
Web. doi:10.1088/14757516/2015/09/049.
Jin, HongBo, National Astronomical Observatories, Chinese Academy of Sciences,Datun Rd, Chaoyang, Beijing, Wu, YueLiang, Kavli Institute for Theoretical Physics China, Institute of Theoretical Physics,Chinese Academy of Sciences, Zhong Guan Cun East Street 55 #, P.O. Box 2735,Beijing, 100190 P.R., University of Chinese Academy of Sciences,Beijing, 100190 P.R., Zhou, YuFeng, & Kavli Institute for Theoretical Physics China, Institute of Theoretical Physics,Chinese Academy of Sciences, Zhong Guan Cun East Street 55 #, P.O. Box 2735,Beijing, 100190 P.R.. Cosmic ray propagation and dark matter in light of the latest AMS02 data. United States. doi:10.1088/14757516/2015/09/049.
Jin, HongBo, National Astronomical Observatories, Chinese Academy of Sciences,Datun Rd, Chaoyang, Beijing, Wu, YueLiang, Kavli Institute for Theoretical Physics China, Institute of Theoretical Physics,Chinese Academy of Sciences, Zhong Guan Cun East Street 55 #, P.O. Box 2735,Beijing, 100190 P.R., University of Chinese Academy of Sciences,Beijing, 100190 P.R., Zhou, YuFeng, and Kavli Institute for Theoretical Physics China, Institute of Theoretical Physics,Chinese Academy of Sciences, Zhong Guan Cun East Street 55 #, P.O. Box 2735,Beijing, 100190 P.R.. 2015.
"Cosmic ray propagation and dark matter in light of the latest AMS02 data". United States.
doi:10.1088/14757516/2015/09/049.
@article{osti_22458380,
title = {Cosmic ray propagation and dark matter in light of the latest AMS02 data},
author = {Jin, HongBo and National Astronomical Observatories, Chinese Academy of Sciences,Datun Rd, Chaoyang, Beijing and Wu, YueLiang and Kavli Institute for Theoretical Physics China, Institute of Theoretical Physics,Chinese Academy of Sciences, Zhong Guan Cun East Street 55 #, P.O. Box 2735,Beijing, 100190 P.R. and University of Chinese Academy of Sciences,Beijing, 100190 P.R. and Zhou, YuFeng and Kavli Institute for Theoretical Physics China, Institute of Theoretical Physics,Chinese Academy of Sciences, Zhong Guan Cun East Street 55 #, P.O. Box 2735,Beijing, 100190 P.R.},
abstractNote = {The AMS02 experiment is measuring the high energy cosmic rays with unprecedented accuracy. We explore the possibility of determining the cosmicray propagation models using the AMS02 data alone. A global Bayesian analysis of the constraints on the cosmicray propagation models from the preliminary AMS02 data on the Boron to Carbon nuclei flux ratio and proton flux is performed, with the assumption that the primary nucleon source is a broken power law in rigidity. The ratio of the diffusion coefficient D{sub 0} to the diffusive halo height Z{sub h} is determined with high accuracy D{sub 0}/Z{sub h}≃2.00±0.07 cm{sup 2}s{sup −1}kpc{sup −1}, and the value of the halo width is found to be Z{sub h}≃3.3 kpc with uncertainty less than 50%. As a consequence, the typical uncertainties in the positron fraction predicted from dark matter (DM) annihilation is reduced to a factor of two, and that in the antiproton flux is about an order of magnitude. Both of them are significantly smaller than that from the analyses prior to AMS02. Taking into account the uncertainties and correlations in the propagation parameters, we derive conservative upper limits on the cross sections for DM annihilating into various standard model final states from the current PAMELA antiproton data. We also investigate the reconstruction capability of the future high precision AMS02 antiproton data on the DM properties. The results show that for DM particles lighter than ∼100 GeV and with typical thermal annihilation cross section, the cross section can be well reconstructed with uncertainties about a factor of two for the AMS02 threeyear data taking.},
doi = {10.1088/14757516/2015/09/049},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 09,
volume = 2015,
place = {United States},
year = 2015,
month = 9
}

The AMS02 experiment is measuring the high energy cosmic rays with unprecedented accuracy. We explore the possibility of determining the cosmicray propagation models using the AMS02 data alone. A global Bayesian analysis of the constraints on the cosmicray propagation models from the preliminary AMS02 data on the Boron to Carbon nuclei flux ratio and proton flux is performed, with the assumption that the primary nucleon source is a broken power law in rigidity. The ratio of the diffusion coefficient D{sub 0} to the diffusive halo height Z{sub h} is determined with high accuracy D{sub 0}/Z{sub h}≅ 2.00±0.07 cm{sup 2}s{sup −1}kpc{sup −1}, andmore »

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