Hypertriton production yield in LHC pp collisions, described by nuclear coalescence, confirms its halo structure with a Lambda separation of 9.54 fm from the deuteron core.
Cosmic rays, antihelium, and an old navy spotlight
3 Pith papers cite this work. Polarity classification is still indexing.
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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.
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UNVERDICTED 3representative citing papers
Multiplicity-dependent measurements of B_A for hyper-nuclei with extended wave functions like the hyper-triton in pp, pA, and AA collisions are predicted to show large differences between coalescence and thermal models.
Updated predictions for cosmic antinuclei fluxes from dark matter yield tighter upper limits on light DM annihilation cross sections from AMS-02 antiproton data and show that GAPS could improve those limits by up to an order of magnitude below 50 GeV.
citing papers explorer
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Wave-Function Femtometry: Hypertriton - The Ultimate Halo Nucleus
Hypertriton production yield in LHC pp collisions, described by nuclear coalescence, confirms its halo structure with a Lambda separation of 9.54 fm from the deuteron core.
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Testing production scenarios for (anti-)(hyper-)nuclei with multiplicity-dependent measurements at the LHC
Multiplicity-dependent measurements of B_A for hyper-nuclei with extended wave functions like the hyper-triton in pp, pA, and AA collisions are predicted to show large differences between coalescence and thermal models.
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Revisiting predictions for cosmic-ray antinucleon fluxes from Galactic Dark Matter
Updated predictions for cosmic antinuclei fluxes from dark matter yield tighter upper limits on light DM annihilation cross sections from AMS-02 antiproton data and show that GAPS could improve those limits by up to an order of magnitude below 50 GeV.