%0 Generic %1 heisig2020matter %A Heisig, Jan %A Korsmeier, Michael %A Winkler, Martin Wolfgang %D 2020 %K tifr %T Dark matter or correlated errors? Systematics of the AMS-02 antiproton excess %U http://arxiv.org/abs/2005.04237 %X Several studies have pointed out an excess in the AMS-02 antiproton spectrum at rigidities of 10-20 GV. Its spectral properties were found to be consistent with a dark-matter particle of mass 50-100 GeV which annihilates hadronically at roughly the thermal rate. In this work, we reinvestigate the antiproton excess including all relevant sources of systematic errors. Most importantly, we perform a fully realistic derivation of the correlations in the AMS-02 systematic error which could potentially "fake" a dark-matter signal. The dominant systematics in the relevant rigidity range originate from uncertainties in the cross sections for absorption of cosmic rays within the detector material. For the first time ever, we calculate their correlations within the full Glauber-Gribov theory of inelastic scattering. The AMS-02 correlations enter our spectral search for dark matter in the form of covariance matrices which we make publicly available for the cosmic-ray community. We find that the global significance of the antiproton excess is reduced to below 1 $\sigma$ once all systematics, including the derived AMS-02 error correlations, are taken into account. No significant preference for a dark-matter signal in the AMS-02 antiproton data is found in the mass range 10-10000 GeV.

@misc{heisig2020matter, abstract = {Several studies have pointed out an excess in the AMS-02 antiproton spectrum at rigidities of 10-20 GV. Its spectral properties were found to be consistent with a dark-matter particle of mass 50-100 GeV which annihilates hadronically at roughly the thermal rate. In this work, we reinvestigate the antiproton excess including all relevant sources of systematic errors. Most importantly, we perform a fully realistic derivation of the correlations in the AMS-02 systematic error which could potentially "fake" a dark-matter signal. The dominant systematics in the relevant rigidity range originate from uncertainties in the cross sections for absorption of cosmic rays within the detector material. For the first time ever, we calculate their correlations within the full Glauber-Gribov theory of inelastic scattering. The AMS-02 correlations enter our spectral search for dark matter in the form of covariance matrices which we make publicly available for the cosmic-ray community. We find that the global significance of the antiproton excess is reduced to below 1 $\sigma$ once all systematics, including the derived AMS-02 error correlations, are taken into account. No significant preference for a dark-matter signal in the AMS-02 antiproton data is found in the mass range 10-10000 GeV.}, added-at = {2020-05-12T07:42:53.000+0200}, author = {Heisig, Jan and Korsmeier, Michael and Winkler, Martin Wolfgang}, biburl = {https://www.bibsonomy.org/bibtex/248d392c3368898ebf153acca6a251bc2/citekhatri}, description = {Dark matter or correlated errors? Systematics of the AMS-02 antiproton excess}, interhash = {8b34a92aa8252870159b41d7c0280ce6}, intrahash = {48d392c3368898ebf153acca6a251bc2}, keywords = {tifr}, note = {cite arxiv:2005.04237Comment: 22 pages + references, 6 figures; ancillary files contain covariance matrices of the AMS-02 errors (antiproton flux, antiproton/proton, proton flux, helium flux, B/C) and correlation matrices for the absorption cross section error (antiproton-carbon, proton-carbon)}, timestamp = {2020-05-12T07:42:53.000+0200}, title = {Dark matter or correlated errors? Systematics of the AMS-02 antiproton excess}, url = {http://arxiv.org/abs/2005.04237}, year = 2020 }