Relativistic three-body calculations of a Y = 1, I=32, JP = 2 + πΛN-πσN dibaryon

H. Garcilazo, A. Gal

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The πΛ. N-πσ. N coupled-channel system with quantum numbers (Y, I, JP)=(1, 32, 2+) is studied in a relativistic three-body model, using two-body separable interactions in the dominant p-wave pion-baryon and S13 YN channels. Three-body equations are solved in the complex energy plane to search for quasibound state and resonance poles, producing a robust narrow πΛN resonance about 10-20 MeV below the πσN threshold. Viewed as a dibaryon, it is a S25 quasibound state consisting of σ(1385). N and δ(1232). Y components. Comparison is made between the present relativistic model calculation and a previous, outdated nonrelativistic calculation which resulted in a πΛN bound state. Effects of adding a K̄NN channel are studied and found insignificant. Possible production and decay reactions of this (Y,I,JP)=(1,32,2+) dibaryon are discussed. © 2012 Elsevier B.V.
Original languageAmerican English
Pages (from-to)167-178
Number of pages149
JournalNuclear Physics A
DOIs
StatePublished - 2 Jan 2013

Fingerprint

Elementary Particles
5-chloro-3-tert-butyl-2'-chloro-4'-nitrosalicylanilide
Mesons
quantum numbers
baryons
pions
poles
thresholds
decay
interactions
energy

Cite this

@article{83b8db265b3647af88c46e48c98f505a,
title = "Relativistic three-body calculations of a Y = 1, I=32, JP = 2 + πΛN-πσN dibaryon",
abstract = "The πΛ. N-πσ. N coupled-channel system with quantum numbers (Y, I, JP)=(1, 32, 2+) is studied in a relativistic three-body model, using two-body separable interactions in the dominant p-wave pion-baryon and S13 YN channels. Three-body equations are solved in the complex energy plane to search for quasibound state and resonance poles, producing a robust narrow πΛN resonance about 10-20 MeV below the πσN threshold. Viewed as a dibaryon, it is a S25 quasibound state consisting of σ(1385). N and δ(1232). Y components. Comparison is made between the present relativistic model calculation and a previous, outdated nonrelativistic calculation which resulted in a πΛN bound state. Effects of adding a K̄NN channel are studied and found insignificant. Possible production and decay reactions of this (Y,I,JP)=(1,32,2+) dibaryon are discussed. {\circledC} 2012 Elsevier B.V.",
author = "H. Garcilazo and A. Gal",
year = "2013",
month = "1",
day = "2",
doi = "10.1016/j.nuclphysa.2012.11.006",
language = "American English",
pages = "167--178",
journal = "Nuclear Physics A",
issn = "0375-9474",
publisher = "Elsevier",

}

Relativistic three-body calculations of a Y = 1, I=32, JP = 2 + πΛN-πσN dibaryon. / Garcilazo, H.; Gal, A.

In: Nuclear Physics A, 02.01.2013, p. 167-178.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Relativistic three-body calculations of a Y = 1, I=32, JP = 2 + πΛN-πσN dibaryon

AU - Garcilazo, H.

AU - Gal, A.

PY - 2013/1/2

Y1 - 2013/1/2

N2 - The πΛ. N-πσ. N coupled-channel system with quantum numbers (Y, I, JP)=(1, 32, 2+) is studied in a relativistic three-body model, using two-body separable interactions in the dominant p-wave pion-baryon and S13 YN channels. Three-body equations are solved in the complex energy plane to search for quasibound state and resonance poles, producing a robust narrow πΛN resonance about 10-20 MeV below the πσN threshold. Viewed as a dibaryon, it is a S25 quasibound state consisting of σ(1385). N and δ(1232). Y components. Comparison is made between the present relativistic model calculation and a previous, outdated nonrelativistic calculation which resulted in a πΛN bound state. Effects of adding a K̄NN channel are studied and found insignificant. Possible production and decay reactions of this (Y,I,JP)=(1,32,2+) dibaryon are discussed. © 2012 Elsevier B.V.

AB - The πΛ. N-πσ. N coupled-channel system with quantum numbers (Y, I, JP)=(1, 32, 2+) is studied in a relativistic three-body model, using two-body separable interactions in the dominant p-wave pion-baryon and S13 YN channels. Three-body equations are solved in the complex energy plane to search for quasibound state and resonance poles, producing a robust narrow πΛN resonance about 10-20 MeV below the πσN threshold. Viewed as a dibaryon, it is a S25 quasibound state consisting of σ(1385). N and δ(1232). Y components. Comparison is made between the present relativistic model calculation and a previous, outdated nonrelativistic calculation which resulted in a πΛN bound state. Effects of adding a K̄NN channel are studied and found insignificant. Possible production and decay reactions of this (Y,I,JP)=(1,32,2+) dibaryon are discussed. © 2012 Elsevier B.V.

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84870550112&origin=inward

UR - https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84870550112&origin=inward

U2 - 10.1016/j.nuclphysa.2012.11.006

DO - 10.1016/j.nuclphysa.2012.11.006

M3 - Article

SP - 167

EP - 178

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

ER -