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• W2609508522 abstract "Cosmic-ray anti-deuterium and anti-helium have long been suggested as probes of dark matter, as their secondary astrophysical production was thought extremely scarce. But how does one actually predict the secondary flux? Anti-nuclei are dominantly produced in pp collisions, where laboratory cross section data is lacking. We make a new attempt at tackling this problem by appealing to a scaling law of nuclear coalescence with the physical volume of the hadronic emission region. The same volume is probed by Hanbury Brown-Twiss (HBT) two-particle correlations. We demonstrate the consistency of the scaling law with systems ranging from central and off-axis AA collisions to pA collisions, spanning 3 orders of magnitude in coalescence yield. Extending the volume scaling to the pp system, HBT data allows us to make a new estimate of coalescence, that we test against preliminary ALICE pp data. For anti-helium the resulting cross section is 1-2 orders of magnitude higher than earlier estimates. The astrophysical secondary flux of anti-helium could be within reach of a five-year exposure of AMS02." @default.
• W2609508522 created "2017-05-05" @default.
• W2609508522 creator A5015770992 @default.
• W2609508522 creator A5031931893 @default.
• W2609508522 creator A5050331266 @default.
• W2609508522 creator A5067990152 @default.
• W2609508522 date "2017-11-28" @default.
• W2609508522 modified "2023-10-16" @default.
• W2609508522 title "Cosmic rays, antihelium, and an old navy spotlight" @default.
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• W2609508522 doi "https://doi.org/10.1103/physrevd.96.103021" @default.
• W2609508522 hasPublicationYear "2017" @default.
• W2609508522 type Work @default.
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