One-boson-exchange potential model for the ΛN interaction

Brown, J.T.; Downs, B. W.; Idding, C.K

doi:10.1016/0003-4916(70)90484-7

Cited by 62 publications

(8 citation statements)

References 82 publications

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“…We notice that now the set of the exchanged quantum numbers for OBE-potentials is identical to that for MPE-potentials. (iii) For the meson-exchange we have included the Brown-Downs-Iddings anti-symmetric spin-orbit potentials from pseudoscalar-, vector-, scalar-, and axial-meson exchange [16]. (iv) We have completed the 1/M -corrections for mesonpair-exchange (MPE), in particular for the J P C = 1 ++and J P C = 1 +− -axial pairs.…”

Section: Introductionmentioning

confidence: 99%

Extended-soft-core baryon-baryon model ESC16. II. Hyperon-nucleon interactions

2019

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This paper presents the Extended-Soft-Core (ESC) potentials ESC08c for baryon-baryon channels with total strangeness S = −2. The potential models for S = −2 are based on SU(3) extensions of potential models for the S = 0 and S = −1 sectors, which are fitted to experimental data. Flavor SU(3)-symmetry is broken only 'kinematically' by the masses of the baryons and the mesons. For the S=-2 channels no experimental scattering data exist, and also the information from hypernuclei is rather limited. Nevertheless, in the fit to the S = 0 and S = −1 sectors information from the NAGARA event and the Ξ-well-depth has been used as constraints to determine the free parameters in the simultaneous fit of the N N ⊕ Y N ⊕ Y Y data. Therefore, the potentials for the S = −2 sectors are mainly determined by the NN-, YN-data, and SU(3)-symmetry. Various properties of the potentials are illustrated by giving results for scattering lengths, bound states, phase-parameters, and total cross sections. Notably is the prediction of a bound state D * in the ΞN ( 3 S1, I = 1)-channel with a binding energy BE = 1.56 MeV. This state is "deuteron-like" i.e. a member of the {10 * }-decuplet. As for the normal deuteron D = pn( 3 S1 − 3 D1) the strong tensor force is responsible for this state.The features of Ξ hypernuclei predicted by ESC08c are studied on the basis of the G-matrix approach. The well-depth UΞ = −7.0 MeV and the ΞN − ΛΛ conversion width is Γ c Ξ = 4.5 MeV.

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Section: Introductionmentioning

confidence: 99%

Extended-soft-core baryon-baryon model ESC16. II. Hyperon-nucleon interactions

2019

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“…The strength of the Λ spin-orbit splitting in ESC07 is, as seen from Table 6, much smaller than in ESC04d. This is due to the BDI-term [17] and the new 1/M-corrections in the MPEpotentials for strangeness-exchange. As we will show below the present version the ESC-model can easily accomodate the small experimental spin-orbit splitting [19] in the ΛN-interaction [23].…”

Section: Hyperon-nucleon/hyperon: Esc08mentioning

confidence: 97%

“…These terms were given by Brown, Downs, and Iddings [17], and their possible importance was pointed out by Dover and Gal [18]. They show up for the S 0-exchanges with K, K * , κ, etc.…”

mentioning

confidence: 96%

Status of understanding the YN/YY-interactions Meson-exchange viewpoint

2010

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“…We evaluated two corrections [20] to the (anti-)spin-orbit potential: (i) the BDI anti-spinorbit OBE-potentials [21], and (ii) corrections coming from axial-pair exchange. These lead to a satisfactory description of the observed small spin-orbit splittings in Λ-hypernuclei [22].…”

Section: Epilogue: Esc04d'-modelmentioning

confidence: 99%

Recent soft-core baryon–baryon interactions

Rijken¹,

Yamamoto²

2008

Nuclear Physics A

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Recent results obtained with the extended-soft-core (ESC) interactions are presented. In a unified manner the ESC-model describes nucleon-nucleon (NN), hyperon-nucleon (YN), and hyperon-hyperon (YY), using (broken) SU F (3)-symmetry. In the ESC approach to baryon-baryon (BB) the dynamics is derived from (i) one-boson-exchanges (OBE), (ii) two-meson-exchanges (TME), and (iii) meson-pairexchanges (MPE). Special features are the inclusion of the axial-vector meson potentials, and a zero in the scalar-meson form-factors. With these ingredients a rather flexible dynamical framework is constructed. Namely, it appeared feasible to keep the parameters of the model rather close to the predictions of the 3 P 0 quark-pair-creation model (QPC). This is the case for the meson-baryon coupling constants and the F /(F + D)-ratios as well. The NN, YN, and YY results for this model are rather promising. Here, we report on a recently obtained version, called ESC04. Also, we present the first results with the next version, called ESC06, where we explore the inclusion of the second nonets for the pseudoscalar, vector, and scalar mesons, which have masses approximately in the interval 1 GeV M 1.5 GeV. In the qq-picture these mesons are the radially excited states, with principal quantum number N = 2, of the low lying meson nonets for M 1 GeV. This improves the Σ-well-depth considerably.

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One-boson-exchange potential model for the ΛN interaction

Cited by 62 publications

References 82 publications

Extended-soft-core baryon-baryon model ESC16. II. Hyperon-nucleon interactions

Extended-soft-core baryon-baryon model ESC16. II. Hyperon-nucleon interactions

Status of understanding the YN/YY-interactions Meson-exchange viewpoint

Recent soft-core baryon–baryon interactions

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