Consistency of ΛΛ hypernuclear events

Gal, A.; Millener, D.J.

doi:10.1007/s10751-011-0542-y

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…On the other hand, still little is known about the hyperon-hyperon interaction resulting from the limited knowledge of double-Λ hypernuclei [56,57]. The few experimental data point towards a weakly attractive U Λ Λ potential [57][58][59]. Nothing can be said about ΛΞ and ΞΞ interactions.…”

Section: B Nucleon-hyperon Interactionmentioning

confidence: 99%

Many-Body Forces in the Equation of State of Hyperonic Matter

Gomes

Dexheimer

Schramm

et al. 2015

ApJ

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In this work we introduce an extended version of the formalism proposed originally by Taurines et al. that considers the effects of many-body forces simulated by non-linear self-couplings and mesonmeson interaction contributions. In this extended version of the model, we assume that matter is at zero temperature, charge neutral and in beta-equilibrium, considering that the baryon octet interacts by the exchange of scalar-isoscalar (σ, σ * ), vector-isoscalar (ω, φ), vector-isovector ( ) and scalar-isovector (δ) meson fields. Using nuclear matter properties, we constrain the parameters of the model that describe the intensity of the indirectly density dependent baryon-meson couplings to a small range of possible values. We then investigate asymmetric hyperonic matter properties. We report that the formalism developed in this work is in agreement with experimental data and also allows for the existence of massive hyperon stars (with more than 2M ) with small radii, compatible with astrophysical observations.

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Section: B Nucleon-hyperon Interactionmentioning

confidence: 99%

Many-Body Forces in the Equation of State of Hyperonic Matter

Gomes

Dexheimer

Schramm

et al. 2015

ApJ

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“…The situation is more complicated for some of the 3-body or 4-body systems made of nucleons and hyperons, and needs to be clarified. The tetraneutron, 4 n = (n, n, n, n), is naively suggested by the stability of 8 He isotope, but has received only controversial experimental indications [1]. Its stability cannot be established using realistic neutron-neutron potentials [2][3][4][5][6], nor even with potentials made artificially deeper to produce a dineutron 2 n, due to the Pauli principle.…”

Section: Introductionmentioning

confidence: 99%

“…The physics of hypernuclei is progressing dramatically in both experiment and theory, for which recent reviews can be found in [7,8]. For baryon number A = 2, there is no evidence for a stable (n, Λ) nor (p, Λ) bound state, except for a mass peak of about 2.06 GeV seen in d + π − [9].…”

Section: Introductionmentioning

confidence: 99%

Lightest neutral hypernuclei with strangeness−1and−2

2015

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Our current knowledge of the baryon-baryon interaction suggests that the dineutron (n, n) and its strange analogue (n, Λ) are unstable. In contrast, the situation is more favorable for the strange three-body system (n, n, Λ), and even better for the four-body system T ≡ (n, n, Λ, Λ) with strangeness −2, which is likely to be stable under spontaneous dissociation. The recent models of the hyperon-nucleon and hyperon-hyperon interactions suggest that the stability of the (n, n, Λ) and T is possible within the uncertainties of our knowledge of the baryon-baryon interactions. This new nucleus T could be produced and identified in central deuteron-deuteron collisions via reaction d + d → T + K + + K + , and the tetrabaryon T could play an important role in catalyzing the formation of a strange core in neutron stars.

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“…There have been significant progresses in the study of hypernuclei in both experiment and theory during the past decades. The discovery of a number of hypernuclei with S = −1 and S = −2 has greatly enriched our knowledge about the hyperon-nucleon and hyperon-hyperon interactions [254,255], and the search for stable hypernuclei still serves as a direct probe for many interesting physics with the presence of hyperons in nuclear matter.…”

Section: Search For New Dibaryons At the Nica Spd Facilitymentioning

confidence: 99%

Possible Studies at the First Stage of the NICA Collider Operation with Polarized and Unpolarized Proton and Deuteron Beams

Abramov

Aleshko²,

Baskov

et al. 2021

Phys. Part. Nuclei

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Nuclotron based Ion Collider fAcility (NICA) project is in progress at the Joint Institute for Nuclear Research and will start experiments with heavy ions. In the context of the NICA Hadronic Physics programme double polarized pp-, dd-and pd-collisions even at lower energies of √ sNN = 3.4 − 10 GeV, which will be accessible already at the initial stage of experiments,are essential tools for precise understanding the spin dependence of the nucleon-nucleon strong interactions, in both elastic and deep-inelastic regimes. A special interest is interaction in few baryon systems at double strangeness, charm and beauty thresholds.For instance, polarized large-angle elastic pp and pn scattering near the charm threshold allows one to get an access to properties of possible exotic multiquark states and their relation to the states recently observed at LHCb.Large angle scattering of protons and deuterons on the deuteron contains unique information on the short-range structure of the deuteron, its non-nucleonic degrees of freedom and also on color transparency phenomenon. Furthermore, double polarized proton-deuteron scattering offer a possibility to test the Standard Model through the search for time-invariance (or CP-invariance under CPT symmetry) violation and parity-violation in single-polarized scattering. This paper contains suggestions for experiments with usage of the Spin Physics Detector (SPD) and discusses perspectives of the first stage of the SPD Programme. This includes experiments with non-polarized beams too as well as collisions like 12 С-12 С and 40 Сa-40 Ca.9 Multiquark correlations and exotic hadron state production 9 9.1 Multiquark correlations and exotic state production at SPD NICA . . . .

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Consistency of ΛΛ hypernuclear events

Abstract: Highlights of ΛΛ emulsion events are briefly reviewed. Given three accepted events, shell-model predictions based on p-shell Λ hypernuclear spectroscopic studies are shown to reproduce B ΛΛ (

Cited by 8 publications

References 29 publications

Many-Body Forces in the Equation of State of Hyperonic Matter

Many-Body Forces in the Equation of State of Hyperonic Matter

Lightest neutral hypernuclei with strangeness−1and−2

Possible Studies at the First Stage of the NICA Collider Operation with Polarized and Unpolarized Proton and Deuteron Beams

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