Fully correlated study of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mi /><mml:mrow><mml:mi>Λ</mml:mi><mml:mi>Λ</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msubsup><mml:mi mathvariant="normal">He</mml:mi></mml:mrow></mml:math>hypernucleus including<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Λ</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:math>space-exchange correlations

Usmani, A. A.; Hasan, Z.

doi:10.1103/physrevc.74.034320

Cited by 9 publications

(32 citation statements)

References 39 publications

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“…In the extreme case of degenerate doublet levels, using B Λ = B exp Λ ( 10 Λ Z g.s. 12 ΛΛ Be assignment of the HIDA event is somewhat more likely than a 11 ΛΛ Be assignment, both assignments are ruled out by the SM.…”

Section: Shell-model Calculations and Predictions For λλ Hypernucleimentioning

confidence: 87%

“…Normally these observed events do not offer unique assignments, except for 6 ΛΛ He which is the lightest particle-stable ΛΛ hypernucleus established firmly so far [5]. Numerous 6 ΛΛ He calculations have been reported since then, including Faddeev [6,7] and variational [8] αΛΛ cluster calculations, as well as VMC [9,10] and stochastic variational [11,12] six-body calculations. The separation energy B ΛΛ of the two Λ's in this system exceeds the sum of separation energies B Λ of each of its Λ's in the single-Λ hypernucleus 5 Λ He by less than 1 MeV [4]:…”

Section: Introductionmentioning

confidence: 99%

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Shell-model predictions for ΛΛ hypernuclei

Gal

Millener

2011

Physics Letters B

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Section: Shell-model Calculations and Predictions For λλ Hypernucleimentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Shell-model predictions for ΛΛ hypernuclei

Gal

Millener

2011

Physics Letters B

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“…(5). The range of parameters C P , C S and W D can be found in Table I [37,38,40]), but no unique set of parameters has been set so far.…”

Section: B Hyperon-nucleon Interactionmentioning

confidence: 99%

“…For the ΛΛ potential, we follow the guide lines adopted in the three-and four-body cluster models for double Λ hypernuclei [47,48], which were also used in Faddeev-Yakubovsky calculations for light double Λ hypernuclei [49] [37,38,40,51], with different parametrizations.…”

Section: Hyperon-hyperon Interactionmentioning

confidence: 99%

“…To describe the interaction between the Λ particle and the nucleons, we adopt a class of Argonne-like interactions that have been developed starting from the 1980's by Bodmer, Usmani, and Carlson on the grounds of Quantum Monte Carlo methods and have been mostly used in Variational Monte Carlo calculations [28][29][30][31][32][33][34][35][36][37][38][39][40][41]. The interaction is written in coordinate space and it includes two-and three-body hyperon-nucleon components with a hard-core repulsion between baryons and a charge symmetry breaking term.…”

Section: B Hyperon-nucleon Interactionmentioning

confidence: 99%

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Accurate determination of the interaction betweenΛhyperons and nucleons from auxiliary field diffusion Monte Carlo calculations

2014

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Background: An accurate assessment of the hyperon-nucleon interaction is of great interest in view of recent observations of very massive neutron stars. The challenge is to build a realistic interaction that can be used over a wide range of masses and in infinite matter starting from the available experimental data on the binding energy of light hypernuclei. To this end, accurate calculations of the hyperon binding energy in a hypernucleus are necessary.Purpose: We present a quantum Monte Carlo study of Λ and ΛΛ hypernuclei up to A = 91. We investigate the contribution of two-and three-body Λ-nucleon forces to the Λ binding energy.Method: Ground state energies are computed solving the Schrödinger equation for non-relativistic baryons by means of the auxiliary field diffusion Monte Carlo algorithm extended to the hypernuclear sector. Results:We show that a simple adjustment of the parameters of the ΛN N three-body force yields a very good agreement with available experimental data over a wide range of hypernuclear masses. In some cases no experiments have been performed yet, and we give new predictions.Conclusions: The newly fitted ΛN N force properly describes the physics of medium-heavy Λ hypernuclei, correctly reproducing the saturation property of the hyperon separation energy.

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Behaviour of the potentials due to strangeness degree of freedom in ⁶_ΛΛHe hypernucleus

Usmani

Hasan

2007

J. Phys. G: Nucl. Part. Phys.

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Fully correlated study of 6 ΛΛ He hypernucleus has been performed with two-and three-baryon potentials. For the S = −2 sector, various simulations of Nijmegen ΛΛ potential models have been used. We investigate the role of every strength of the strange sector potentials on the energy breakdown and present a crystal clear understanding of their interplay. Consistency of calculations between 5 Λ He and 6 ΛΛ He depends on the ΛN space-exchange strength only. Investigation limits the strength of simulated Nijmegen ΛΛ potentials. The study is a step forward to determine all these strengths, to resolve A = 5 anomaly and to search for recently conjectured 4 ΛΛ H in an authentic way.

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Fully correlated study ofΛΛ6Hehypernucleus includingΛNspace-exchange correlations

Cited by 9 publications

References 39 publications

Shell-model predictions for ΛΛ hypernuclei

Shell-model predictions for ΛΛ hypernuclei

Accurate determination of the interaction betweenΛhyperons and nucleons from auxiliary field diffusion Monte Carlo calculations

Behaviour of the potentials due to strangeness degree of freedom in ⁶_ΛΛHe hypernucleus

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Fully correlated study ofΛΛ6Hehypernucleus includingΛNspace-exchange correlations

Cited by 9 publications

References 39 publications

Shell-model predictions for ΛΛ hypernuclei

Shell-model predictions for ΛΛ hypernuclei

Accurate determination of the interaction betweenΛhyperons and nucleons from auxiliary field diffusion Monte Carlo calculations

Behaviour of the potentials due to strangeness degree of freedom in 6ΛΛHe hypernucleus

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Product

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Behaviour of the potentials due to strangeness degree of freedom in ⁶_ΛΛHe hypernucleus