Three-body model calculations of N δ and δδ dibaryon resonances

Avraham Gal; Humberto Garcilazo

doi:10.1016/j.nuclphysa.2014.02.019

Three-body model calculations of N δ and δδ dibaryon resonances

Avraham Gal^*, Humberto Garcilazo

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

86 Scopus citations

Abstract

Three-body hadronic models with separable pairwise interactions are formulated and solved to calculate resonance masses and widths of L=0 Nδ and δδ dibaryons using relativistic kinematics. For Nδ, I(J^P)=1(2⁺) and 2(1⁺) resonances slightly below threshold are found by solving πNN Faddeev equations. For δδ, several resonances below threshold are found by solving πNδ Faddeev equations in which the Nδ interaction is dominated by the 1(2⁺) and 2(1⁺) resonating channels. The lowest δδ dibaryon resonances found are for I(J^P)=0(3⁺) and 3(0⁺), the former agreeing well both in mass and in width with the relatively narrow D₀₃(2370) resonance observed recently by the WASA@COSY Collaboration. Its spin-isospin symmetric partner D30 is predicted with mass around 2.4 GeV and width about 80 MeV.

Original language	English
Pages (from-to)	73-88
Number of pages	16
Journal	Nuclear Physics A
Volume	928
DOIs	https://doi.org/10.1016/j.nuclphysa.2014.02.019
State	Published - 3 Mar 2014

Bibliographical note

Publisher Copyright:
© 2014 Elsevier B.V.

Keywords

Dibaryons
Faddeev equations
Nucleon-nucleon interactions
Pion-baryon interactions

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10.1016/j.nuclphysa.2014.02.019

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title = "Three-body model calculations of N δ and δδ dibaryon resonances",

abstract = "Three-body hadronic models with separable pairwise interactions are formulated and solved to calculate resonance masses and widths of L=0 Nδ and δδ dibaryons using relativistic kinematics. For Nδ, I(JP)=1(2+) and 2(1+) resonances slightly below threshold are found by solving πNN Faddeev equations. For δδ, several resonances below threshold are found by solving πNδ Faddeev equations in which the Nδ interaction is dominated by the 1(2+) and 2(1+) resonating channels. The lowest δδ dibaryon resonances found are for I(JP)=0(3+) and 3(0+), the former agreeing well both in mass and in width with the relatively narrow D03(2370) resonance observed recently by the WASA@COSY Collaboration. Its spin-isospin symmetric partner D30 is predicted with mass around 2.4 GeV and width about 80 MeV.",

keywords = "Dibaryons, Faddeev equations, Nucleon-nucleon interactions, Pion-baryon interactions",

author = "Avraham Gal and Humberto Garcilazo",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2014",

month = mar,

day = "3",

doi = "10.1016/j.nuclphysa.2014.02.019",

language = "אנגלית",

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T1 - Three-body model calculations of N δ and δδ dibaryon resonances

AU - Gal, Avraham

AU - Garcilazo, Humberto

PY - 2014/3/3

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N2 - Three-body hadronic models with separable pairwise interactions are formulated and solved to calculate resonance masses and widths of L=0 Nδ and δδ dibaryons using relativistic kinematics. For Nδ, I(JP)=1(2+) and 2(1+) resonances slightly below threshold are found by solving πNN Faddeev equations. For δδ, several resonances below threshold are found by solving πNδ Faddeev equations in which the Nδ interaction is dominated by the 1(2+) and 2(1+) resonating channels. The lowest δδ dibaryon resonances found are for I(JP)=0(3+) and 3(0+), the former agreeing well both in mass and in width with the relatively narrow D03(2370) resonance observed recently by the WASA@COSY Collaboration. Its spin-isospin symmetric partner D30 is predicted with mass around 2.4 GeV and width about 80 MeV.

AB - Three-body hadronic models with separable pairwise interactions are formulated and solved to calculate resonance masses and widths of L=0 Nδ and δδ dibaryons using relativistic kinematics. For Nδ, I(JP)=1(2+) and 2(1+) resonances slightly below threshold are found by solving πNN Faddeev equations. For δδ, several resonances below threshold are found by solving πNδ Faddeev equations in which the Nδ interaction is dominated by the 1(2+) and 2(1+) resonating channels. The lowest δδ dibaryon resonances found are for I(JP)=0(3+) and 3(0+), the former agreeing well both in mass and in width with the relatively narrow D03(2370) resonance observed recently by the WASA@COSY Collaboration. Its spin-isospin symmetric partner D30 is predicted with mass around 2.4 GeV and width about 80 MeV.

KW - Dibaryons

KW - Faddeev equations

KW - Nucleon-nucleon interactions

KW - Pion-baryon interactions

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Three-body model calculations of N δ and δδ dibaryon resonances

Abstract

Bibliographical note

Keywords

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