Multiquark picture for Σ (1620)

Seungho Choe

doi:10.1007/PL00013636

Multiquark picture for Σ (1620)

Seungho Choe

Department of Energy and Science and Engineering

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

2 Scopus citations

Abstract

In this work we report on a new QCD sum rule analysis to predict masses of the excited baryon states (e.g. Σ (1620) and Λ (1405)) by using multiquark interpolating fields ((qq̄)(qqq)). For the Σ (1620) we consider the K̄N, ΠΣ, and ΠΛ (I=1) multiquark interpolating fields. The calculated mass from those multiquark states is about 1.592 GeV. For the Λ (1405) we first show the result using the Π⁺Σ^- + Π⁰Σ⁰ + Π^-Σ⁺ (I=0) multiquark interpolating field, and compare the calculated mass to that of our previous result using the Π⁰Σ⁰ multiquark state. We then show that the mass 1.405 GeV is well reproduced when using the K̄N (I=0) multiquark state. The uncertainties in our sum rules are also discussed.

Original language	English
Pages (from-to)	441-448
Number of pages	8
Journal	European Physical Journal A
Volume	7
Issue number	3
DOIs	https://doi.org/10.1007/PL00013636
State	Published - 2000

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10.1007/PL00013636

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@article{f8600b7950874ee9aeb8444e810e0fda,

title = "Multiquark picture for Σ (1620)",

abstract = "In this work we report on a new QCD sum rule analysis to predict masses of the excited baryon states (e.g. Σ (1620) and Λ (1405)) by using multiquark interpolating fields ((q{\=q})(qqq)). For the Σ (1620) we consider the {\=K}N, ΠΣ, and ΠΛ (I=1) multiquark interpolating fields. The calculated mass from those multiquark states is about 1.592 GeV. For the Λ (1405) we first show the result using the Π+Σ- + Π0Σ0 + Π-Σ+ (I=0) multiquark interpolating field, and compare the calculated mass to that of our previous result using the Π0Σ0 multiquark state. We then show that the mass 1.405 GeV is well reproduced when using the {\=K}N (I=0) multiquark state. The uncertainties in our sum rules are also discussed.",

author = "Seungho Choe",

year = "2000",

doi = "10.1007/PL00013636",

language = "English",

volume = "7",

pages = "441--448",

journal = "European Physical Journal A",

issn = "1434-6001",

publisher = "Springer",

number = "3",

}

TY - JOUR

T1 - Multiquark picture for Σ (1620)

AU - Choe, Seungho

PY - 2000

Y1 - 2000

N2 - In this work we report on a new QCD sum rule analysis to predict masses of the excited baryon states (e.g. Σ (1620) and Λ (1405)) by using multiquark interpolating fields ((qq̄)(qqq)). For the Σ (1620) we consider the K̄N, ΠΣ, and ΠΛ (I=1) multiquark interpolating fields. The calculated mass from those multiquark states is about 1.592 GeV. For the Λ (1405) we first show the result using the Π+Σ- + Π0Σ0 + Π-Σ+ (I=0) multiquark interpolating field, and compare the calculated mass to that of our previous result using the Π0Σ0 multiquark state. We then show that the mass 1.405 GeV is well reproduced when using the K̄N (I=0) multiquark state. The uncertainties in our sum rules are also discussed.

AB - In this work we report on a new QCD sum rule analysis to predict masses of the excited baryon states (e.g. Σ (1620) and Λ (1405)) by using multiquark interpolating fields ((qq̄)(qqq)). For the Σ (1620) we consider the K̄N, ΠΣ, and ΠΛ (I=1) multiquark interpolating fields. The calculated mass from those multiquark states is about 1.592 GeV. For the Λ (1405) we first show the result using the Π+Σ- + Π0Σ0 + Π-Σ+ (I=0) multiquark interpolating field, and compare the calculated mass to that of our previous result using the Π0Σ0 multiquark state. We then show that the mass 1.405 GeV is well reproduced when using the K̄N (I=0) multiquark state. The uncertainties in our sum rules are also discussed.

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U2 - 10.1007/PL00013636

DO - 10.1007/PL00013636

M3 - Article

AN - SCOPUS:0040784489

SN - 1434-6001

VL - 7

SP - 441

EP - 448

JO - European Physical Journal A

JF - European Physical Journal A

IS - 3

ER -

Multiquark picture for Σ (1620)

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