Enhanced binding and cold compression of nuclei due to admixture of antibaryons

Bürvenich, T.; Mishustin, I. N.; Satarov, L. M.; Maruhn, J. A.; Stöcker, H.; Greiner, Walter

doi:10.1016/s0370-2693(02)02351-1

Cited by 49 publications

(57 citation statements)

References 31 publications

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“…In our previous paper [24] we have performed self-consistent calculations of bound antibaryon-nuclear systems which take into account rearrangement of nuclear structure due to the presence of a real antibaryon. We have found not only a significant increase in the binding energy but also a strong local compression of nuclei induced by the antibaryon.…”

Section: Introductionmentioning

confidence: 99%

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Antibaryons bound in nuclei

et al. 2005

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We study the possibility of producing a new kind of nuclear systems which in addition to ordinary nucleons contain a few antibaryons (B = p, Λ, etc.). The properties of such systems are described within the relativistic mean-field model by employing G-parity transformed interactions for antibaryons. Calculations are first done for infinite systems and then for finite nuclei from 4 He to 208 Pb. It is demonstrated that the presence of a real antibaryon leads to a strong rearrangement of a target nucleus resulting in a significant increase of its binding energy and local compression. Noticeable effects remain even after the antibaryon coupling constants are reduced by factor 3 − 4 compared to G-parity motivated values. We have performed detailed calculations of the antibaryon annihilation rates in the nuclear environment by applying a kinetic approach. It is shown that due to significant reduction of the reaction Q-values, the in-medium annihilation rates should be strongly suppressed leading to relatively long-lived antibaryonnucleus systems. Multi-nucleon annihilation channels are analyzed too. We have also estimated formation probabilities of bound B + A systems in pA reactions and have found that their observation will be feasible at the future GSI antiproton facility. Several observable signatures are proposed. The possibility of producing multi-quark-antiquark clusters is discussed.

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Section: Introductionmentioning

confidence: 99%

“…Unlike some previous works, we take into account the rearrangement of nuclear structure due to the presence of a real antibaryon This leads to enhanced binding and additional compression of nuclei as was first demonstrated in Ref. [24].…”

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Antibaryons bound in nuclei

et al. 2005

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“…As our estimates show the life times of antibaryons in the nuclear environment could 13 be significantly enhanced due to the reduction of the phase space available for annihilation. Narrow peaks in the pion or kaon spectra at the energy around 1 GeV are proposed as the most clear signature of deeply-bound antibaryon states in nuclei.…”

Section: Discussionmentioning

confidence: 99%

Vacuum, Matter, Antimatter and the Problem of Cold Compression

Greiner¹,

Buervenich²

2004

Computational and Group-Theoretical Methods in Nuclear Physics

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We discuss the possibility of producing a new kind of nuclear system by putting a few antibaryons inside ordinary nuclei. The structure of such systems is calculated within the relativistic mean-field model assuming that the nucleon and antinucleon potentials are related by the G-parity transformation. The presence of antinucleons leads to decreasing vector potential and increasing scalar potential for the nucleons. As a result, a strongly bound system of high density is formed. Due to the significant reduction of the available phase space the annihilation probability might be strongly suppressed in such systems.

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“…The G-parity transformed proton potential is extremely deep: Up ≃ −700 MeV, while the phenomenological antiproton optical potential is much smaller Up ≃ −(100 ÷ 350) MeV [6,7,8]. The static RMF calculations [3,4] predict a strong nuclear compression effect byp andΛ even in the case of realistic potentials.…”

Section: Introductionmentioning

confidence: 99%

“…Recently several authors [1,2,3,4,5] discussed the possibility to compress the nuclear system without much thermal excitation by implanting in it a hadron ( Λ,K,p,Λ) which has an attractive nuclear potential. It is believed that the antibaryon potentials are strongly attractive.…”

Section: Introductionmentioning

confidence: 99%

Cold compression of nuclei induced by antiprotons

Mishustin¹,

Larionov²

2009

Exa/Leap 2008

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On the basis of a dynamical Relativistic Mean Field (RMF) model we study the response of a nucleus on the antiproton implanted in its interior. We solve the Vlasov equation for thep-nuclear system and show assuming a moderately attractivē p optical potential that the compressed state is formed on a rather short time scale of about 4 ÷ 10 fm/c. The evolution of the system afterp annihilation is simulated using the Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) transport model. Finally, several sensitive observables to thep annihilation in a compressed nuclear configuration are proposed, e.g. the nucleon kinetic energy spectra and the total invariant mass distributions of produced mesons.

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Enhanced binding and cold compression of nuclei due to admixture of antibaryons

Cited by 49 publications

References 31 publications

Antibaryons bound in nuclei

Antibaryons bound in nuclei

Vacuum, Matter, Antimatter and the Problem of Cold Compression

Cold compression of nuclei induced by antiprotons

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