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Ξ^-t quasibound state instead of ΛΛnn bound state

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Chinese Physics C 2020年第2期44卷 94-100页

作者： H.Garcilazo A.Valcarce j.vijande Escuela Superior de Física y Matemáticas Instituto Politécnico NacionalEdificio 907738 México D.F.Mexico Departamento de Física Fundamental Universidad de Salamanca37008 SalamancaSpain Departamento de Física Atómica Molecular y NuclearUniversidad de Valencia(UV)and IFIC(UV-CSIC)46100 ValenciaSpain IRIMED joint Research Unit(IIS La Fe-UV) 46100 ValenciaSpain

The coupledΛΛnn-Ξ-pnn system was studied to investigate whether the inclusion of channel coupling is able to bind theΛΛnn *** use a separable potential three-body model of the coupledΛΛnn-Ξ-pnn system and a variational four-body calculation with realistic *** results exclude the possibility of aΛΛnn bound state by a large ***,we found aΞ-t quasibound state above theΛΛnn threshold.

关键词： baryon-baryon interactions few-body systems Faddeev equations

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The _(ΛΛ)~4n system

Chinese Physics C 2017年第7期41卷 61-66页

作者： H.Garcilazo A.Valcarce j.vijande Escuela Superior de Ffsica y Matematicas Instituto Politecnico Nacional Edificio 9 07738 Mexico D.F. Mexico Departamento de Ffsica Fundamental and IUFFyM Universidad de Salamanca E-37008 Salamanca Spain Unidad Mixta de Investigacion en Radioffsica e Instrumentacion Nuclear en Medicina (IRIMED) Instituto de Investigacion Sanitaria La Fe (IIS-La Fe)-Universitat de Valencia (UV) and IFIC (UV-CSIC) Valencia Spain

Using local central Yukawa-type Malfliet-Tjon interactions reproducing the low-energy parameters and phase shifts of the nn system, and the latest updates of the nΛ and ΛΛ Nijmegen ESC08c potentials, we study the possible existence of a ^4 ΛΛn bound state. Our results indicate that the ^4 ΛΛn is unbound, being just above *** discuss the role played by the -1S0 nn repulsive term of the Yukawa-type Malfliet-Tjon interaction.

关键词： baryon-baryon interactions few-body systems

An explanation of the △_(D35)（1930） as a ρ△ bound state

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Chinese Physics C 2009年第12期33卷 1267-1272页

作者： P. Gonzlez E. Oset j. vijande Departamento de Física Teórica Universidad de Valencia (UV) e IFIC (UV - CSIC) Spain Departamento de Física Atómica Molecular y Nuclear Universidad de Valencia (UV) e IFIC (UV - CSIC) Spain

Constituent quark models based on two-body potentials systematically overpredict the mass of △D35(1930). A possible solution to this problem comes out from the application of a schematic hybrid model, containing three-quark as well as meson-baryon components, to the light-quark baryon spectrum. The △D35(1930) and its partners △D33(1940) and △S31(1900) are found to contain a significant ρ△ component. Then, through the use of the hidden gauge formalism, it is shown that these resonances can be dynamically generated from the ρ-△ interaction. In particular △D35(1930) can be interpreted as being essentially a ρ△bound state. This interpretation suggests that the inclusion of ρ△as an effective inelastic channel in data analyses could improve the extraction and identification of the resonance.

关键词： Baryon spectra dynamically generated resonances quark model

Dynamically generated resonances

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Chinese Physics C 2009年第12期33卷 1132-1139页

作者： E. Oset A. Ramos S. Sarkar 孙宝玺 M.j.Vicente Vacas P. Gonzalez j. vijande D. jido T. Sekihara A. Martinez-Torres K. Khemchandani Departamento de Física Teórica and IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo. 22085 46071 Valencia Spain Departament d'Estructura i Constituents de la Matèria and Institut de Ciències del Cosmos Universitat de Barcelona 08028 Barcelona Spain Variable Energy Cyclotron Centre 1/AF Bidhannagar Kolkata 700064 India Institute of Theoretical Physics College of Applied Sciences Beijing University of Technology Departamento de Física Atomica Molecular y Nuclear and IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo. 22085 46071 Valencia Spain Yukawa Institute for Theoretical Physics Kyoto University Kyoto 606-8502 Japan Department of Physics Kyoto University Kyoto 606-8502 Japan Centro de Física Computacional Departamento de Física Universidade de Coimbra P-3004-516 Coimbra Portugal

In this talk I report on recent work related to the dynamical generation of baryonic resonances, some made up from pseudoscalar meson-baryon, others from vector meson-baryon and a third type from two meson-one baryon systems. We can establish a correspondence with known baryonic resonances, reinforcing conclusions previously drawn and bringing new light on the nature of some baryonic resonances of higher mass.

关键词： dynamically generated resonances chiral dynamics hidden gauge formalism for vector mesoninteraction