Production of light particles after antiproton-nucleus annihilation and their interpretation with statistical models

Sudov, A.S.; Botvina, A. S.; Iljinov, A. S.; Golubeva, Ye. S.; Nedorezov, V.; Daniel, H.; Egidy, T. von; Hartmann, F. J.; Hofmann, Peter; Kanert, W.; Plendl, H. S.; Schmidt, G. L.; Schug, C.; Riepe, G.

doi:10.1016/0375-9474(93)90340-4

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…Nuclear annihilation product multiplicity: The intranuclear cascade framework [215,216] can be applied to the annihilation of the antideuteron with the Si nucleus, resulting in two different models. The first model assumes that the two antinucleons of the antideuteron interact with the Si nucleons simultaneously, while the second model assumes that the antinucleons interact with nucleons separately.…”

Section: Gaps Antideuteron Identificationmentioning

confidence: 99%

Review of the theoretical and experimental status of dark matter identification with cosmic-ray antideuterons

et al. 2016

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See paper for full list of authors - 67 pages, 20 figures; submitted to Physics ReportsInternational audienceRecent years have seen increased theoretical and experimental effort towards the first-ever detection of cosmic-ray antideuterons, in particular as an indirect signature of dark matter annihilation or decay. In contrast to indirect dark matter searches using positrons, antiprotons, or gamma-rays, which suffer from relatively high and uncertain astrophysical backgrounds, searches with antideuterons benefit from very suppressed conventional backgrounds, offering a potential breakthrough in unexplored phase space for dark matter. This article is based on the first dedicated cosmic-ray antideuteron workshop, which was held at UCLA in June 2014. It reviews broad classes of dark matter candidates that result in detectable cosmic-ray antideuteron fluxes, as well as the status and prospects of current experimental searches. The coalescence model of antideuteron production and the influence of antideuteron measurements at particle colliders are discussed. This is followed by a review of the modeling of antideuteron propagation through the magnetic fields, plasma currents, and molecular material of our Galaxy, the solar system, the Earth's geomagnetic field, and the atmosphere. Finally, the three ongoing or planned experiments that are sensitive to cosmic-ray antideuterons, BESS, AMS-02, and GAPS, are detailed. As cosmic-ray antideuteron detection is a rare event search, multiple experiments with orthogonal techniques and backgrounds are essential. Many theoretical and experimental groups have contributed to these studies over the last decade, this review aims to provide the first coherent discussion of the relevant dark matter theories that antideuterons probe, the challenges to predictions and interpretations of antideuteron signals, and the experimental efforts toward cosmic antideuteron detection

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Section: Gaps Antideuteron Identificationmentioning

confidence: 99%

Review of the theoretical and experimental status of dark matter identification with cosmic-ray antideuterons

et al. 2016

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“…Kopylov [58]. Previously, this model was applied rather successfully for the description of the break-up of conventional light nuclei in nuclear reactions initiated by protons, pions, antiprotons, and ions [28,51,59,60]. In comparison with experimental yields of different fragments the maximum deviation was about 20-50%.…”

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confidence: 99%

Production of excited double hypernuclei via Fermi breakup of excited strange systems

2011

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Precise spectroscopy of multi-strange hypernuclei provides a unique chance to explore the hyperon-hyperon interaction. In the present work we explore the production of excited states in double hypernuclei following the micro-canonical break-up of an initially excited double hypernucleus which is created by the absorption and conversion of a stopped Ξ − hyperon. Rather independent on the spectrum of possible excited states in the produced double hypernuclei the formation of excited states dominates in our model. For different initial target nuclei which absorb the Ξ − , different double hypernuclei nuclei dominate. Thus the ability to assign the various observable γ-transitions in a unique way to a specific double hypernuclei by exploring various light targets as proposed by the Panda collaboration seems possible. We also confront our predictions with the correlated pion spectra measured by the E906 collaboration.

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“…ThenA,pA, nĀ, and pĀ yields for other nuclei than A = 4 He are not important. We estimated yields for them by assuming thatp(n) annihilation is twice as likely with p than with n in the nucleus [39,38], using the experimental p, D, and 3 H yields forp 6 Li andp 7 Li [37], and otherwise trying to mimic thep 4 He data. There is no data on annihilation of an antinucleus on a nucleus.…”

Section: B Annihilation and Diffusionmentioning

confidence: 99%

“…The yields of the annihilation reactions are important. Fortunately there is data on the most important reaction, antiprotons on helium [35], and also on some other reactions with antiprotons [36,37].…”

Section: B Annihilation Reactionsmentioning

confidence: 99%

Antimatter regions in the early universe and big bang nucleosynthesis

Kurki-Suonio

Sihvola

2000

Phys. Rev. D

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We have studied big bang nucleosynthesis in the presence of regions of antimatter. Depending on the distance scale of the antimatter region, and thus the epoch of their annihilation, the amount of antimatter in the early universe is constrained by the observed abundances. Small regions, which annihilate after weak freezeout but before nucleosynthesis, lead to a reduction in the 4 He yield, because of neutron annihilation. Large regions, which annihilate after nucleosynthesis, lead to an increased 3 He yield. Deuterium production is also affected but not as much. The three most important production mechanisms of 3 He are 1) photodisintegration of 4 He by the annihilation radiation, 2)p 4 He annihilation, and 3)n 4 He annihilation by "secondary" antineutrons produced in 4 He annihilation. Althoughp 4 He annihilation produces more 3 He than the secondaryn 4 He annihilation, the products of the latter survive later annihilation much better, since they are distributed further away from the annihilation zone.PACS numbers: 26.35.+c, 98.80.Ft, 98.80.Cq, 25.43.+t HIP-2000-31/TH

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Production of light particles after antiproton-nucleus annihilation and their interpretation with statistical models

Cited by 10 publications

References 22 publications

Review of the theoretical and experimental status of dark matter identification with cosmic-ray antideuterons

Review of the theoretical and experimental status of dark matter identification with cosmic-ray antideuterons

Production of excited double hypernuclei via Fermi breakup of excited strange systems

Antimatter regions in the early universe and big bang nucleosynthesis

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