Production of light antinuclei in $pp$ collisions by dynamical coalescence and their fluxes in cosmic rays near earth

Shao, Tianhao; Chen, Jinhui; Ma, Yu-Gang; Xu, Zhangbu

doi:10.48550/arxiv.2205.13626

Cited by 1 publication

(2 citation statements)

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“…In Fig. 4, we compare the coalescence factor (24) predicted by the WiFunC model with a simple Gaussian ansatz (blue) and using the space-time picture in Pythia (orange). The results were obtained simulating inelastic pp at 13 TeV, using 8.3 and enforcing the experimental triggers and cuts used in the event selection [40,41].…”

Section: Enhanced Coalescence Probability In Jetsmentioning

confidence: 99%

“…The WiFunC model, as most other sophisticated coalescence models [18][19][20][21][22][23][24], relies on the Wigner function approach, in which the coalescence probability is found by projecting the nucleon Wigner function onto the Wigner function of the light nucleus [25]. One of the key advantages of this approach is the fact that the coalescence probability depends on the hadronic emission region, a quantity which can be measured in femtoscopy experiments [18].…”

Section: Introductionmentioning

confidence: 99%

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The effect of non-equal emission times and space-time correlations on (anti-) nuclei production

M.¹,

Ostapchenko²,

Tjemsland³

2023

Preprint

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Light (anti-) nuclei are a powerful tool both in collider physics and astrophysics. In searches for new and exotic physics, the expected small astrophysical backgrounds at low energies make these antinuclei ideal probes for, e.g., dark matter. At the same time, their composite structure and small binding energies imply that they can be used in collider experiments to probe the hadronisation process and two-particle correlations. For the proper interpretation of such experimental studies, an improved theoretical understanding of (anti-) nuclei production in specific kinematic regions and detector setups is needed. In this work, we develop a coalescence framework for (anti-) deuteron production which accounts for both the emission volume and momentum correlations on an event-by-event basis. This framework goes beyond the equal-time approximation, which has been commonly assumed in femtoscopy experiments and (anti-) nucleus production models until now. Using PYTHIA 8 as an event generator, we find that the equal-time approximation leads to an error of O(10%) in low-energy processes like Υ decays, while the errors are negligible at LHC energies. The framework introduced in this work paves the way for tuning event generators to (anti-) nuclei measurements.

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Section: Enhanced Coalescence Probability In Jetsmentioning

confidence: 99%