Strangeness nuclear physics: a critical review on selected topics

Botta, E.; Bressani, T.; Garbarino, G.

doi:10.1140/epja/i2012-12041-6

Cited by 97 publications

(116 citation statements)

References 314 publications

(714 reference statements)

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“…, from phenomenological analyses of the recent hypernuclear experiments [10]. Throughout this paper, we simply set g σ * Y =0 [11], although they are rather sensitive to the Y-Y interactions.…”

Section: Choice Of Coupling Constantsmentioning

confidence: 99%

Equation of State with Kaon Condensation and Hyperons in Dense Matter

Muto

Maruyama

Tatsumi

et al. 2018

Proceedings of the Workshop on Quarks and Compact Stars 2017 (QCS2017)

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Possible coexistent phase of kaon condensation and hyperons [the (Y + K) phase] in highly dense matter is investigated on the basis of the effective chiral Lagrangian, where the nonlinear kaon field couples with baryons through contact interaction vertices, combined with the relativistic mean-field (RMF) theory. The universal three-body repulsive force, which is constructed by the string-junction model, is introduced in order to make the equation of state (EOS) including the (Y + K) phase stiff enough to be consistent with recent observations of massive neutron stars. The resulting stiff EOS implies that the (Y + K) phase appears only for neutron stars near the maximum mass.

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Section: Choice Of Coupling Constantsmentioning

confidence: 99%

Equation of State with Kaon Condensation and Hyperons in Dense Matter

Muto

Maruyama

Tatsumi

et al. 2018

Proceedings of the Workshop on Quarks and Compact Stars 2017 (QCS2017)

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“…This situation is in sharp contrast to the case of the NN interaction, which is satisfactorily well known mostly due to the large number of NN scattering data and to the huge amount of measured properties of stable and unstable nuclei. The study of hypernuclei and more in general of strange particle physics [19][20][21][22] is partially filling this gap and hopefully will give in the near future the possibility to have accurate and reliable description of the S 0 baryonic interactions. Presently, this is a very active research field both from an experimental and a theoretical point of view.…”

Section: Hyperon Starsmentioning

confidence: 99%

The Hyperon Puzzle in Neutron Stars

Bombaci

2017

Proceedings of the 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015)

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The so called hyperon puzzle, i.e. the difficulty to reconcile the measured masses of neutron stars (NSs) with the presence of hyperons in their interiors, is one of the hot topics in astrophysics which is stimulating copious experimental and theoretical research in hypernuclear physics. After illustrating the origin of the hyperon puzzle, I discuss some of its possible solutions, and particularly those related to the role of hyperonic two-and three-body interactions on the equation of state of dense matter. Afterward, I discuss a possibility to circumvent the hyperon puzzle allowing for the presence of strangeness in NSs in the form of deconfined strange quark matter, and thus considering the so called quark stars, i.e. hybrid stars or strange stars. Finally I discuss the astrophysical consequences of the possible conversion process of an hadronic star to a quark star.

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“…Given the non-negligible size of the three-nucleon induced contribution and consequently its importance in the precise determination of the complete set of decay rates, new measurements and/or experimental analysis are encouraged. Introduction -Since the first observation of Λ hypernuclei in 1953 and the introduction of the strangeness quantum number in the same year, strange nuclei have been investigated with increasing theoretical and experimental efforts [1]. Hypernuclear physics is nowadays a mature field of research which in many aspects is located at the crossroads between particle and nuclear physics.…”

Section: Introductionmentioning

confidence: 99%

“…Introduction -Since the first observation of Λ hypernuclei in 1953 and the introduction of the strangeness quantum number in the same year, strange nuclei have been investigated with increasing theoretical and experimental efforts [1]. Hypernuclear physics is nowadays a mature field of research which in many aspects is located at the crossroads between particle and nuclear physics.…”

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confidence: 99%

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Nonmesonic weak decay of Λ hypernuclei: The ΛN−ΣN coupling

2017

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The nonmesonic weak decay of Λ hypernuclei is studied within a microscopic diagrammatic approach which is extended to include the three-nucleon induced mechanism. We adopt a nuclear matter formalism which, through the local density approximation, allows us to model finite hypernuclei, a one-meson-exchange weak transition potential and a Bonn nucleon-nucleon strong potential. One-, two-and three-nucleon induced weak decay rates are predicted for 12 Λ C by including ground state correlations up to second order in the nucleon-nucleon potential and the recoil of the residual nucleus. Three-nucleon stimulated decays, ΛN N N → nN N N (N = n or p), are considered here for the first time. The obtained decay rates compare well with the latest KEK and FINUDA data. The three-nucleon induced rate turns out to be dominated by nnp-and npp-induced decays, it amounts to ∼ 7% of the total nonmesonic rate and it is ∼ 1/2 of the neutron-induced decay rate. The reduction effect of the nuclear recoil is particularly relevant for the three-nucleon induced rates (∼ 15%), less important for the two-nucleon induced rates (∼ 4%) and negligible for the one-nucleon induced rates. Given the non-negligible size of the three-nucleon induced contribution and consequently its importance in the precise determination of the complete set of decay rates, new measurements and/or experimental analysis are encouraged. Introduction -Since the first observation of Λ hypernuclei in 1953 and the introduction of the strangeness quantum number in the same year, strange nuclei have been investigated with increasing theoretical and experimental efforts [1]. Hypernuclear physics is nowadays a mature field of research which in many aspects is located at the crossroads between particle and nuclear physics. It implies important connections with QCD [2] -consider the relevance of the production of hypernuclei and anti-hypernuclei in relativistic heavy-ion collisions and the possible extension of the usual techniques of lattice QCD, effective field theories and chiral perturbation theory to the baryon-baryon interactions in the strange sector-as well as with astrophysical processes and observables [3], where it provides important inputs to study the thermal evolution, the stability, the macroscopic properties and the composition of compact astrophysical objects, including the so-called "hyperon puzzle" in neutron stars.

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Strangeness nuclear physics: a critical review on selected topics

Cited by 97 publications

References 314 publications

Equation of State with Kaon Condensation and Hyperons in Dense Matter

Equation of State with Kaon Condensation and Hyperons in Dense Matter

The Hyperon Puzzle in Neutron Stars

Nonmesonic weak decay of Λ hypernuclei: The ΛN−ΣN coupling

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