Are θ+ and the Roper resonance diquark-diquark-antiquark states?

R. D. Matheus, F. S. Navarra, M. Nielsen, R. Rodrigues Da Silva, Su Houng Lee

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

We consider a [ud]2s̄ current in the QCD sum rule framework to study the mass of the recently observed pentaquark state θ+(1540), obtaining good agreement with the experimental value. We also study the mass of the pentaquark [ud] 2d̄. Our results are compatible with the interpretation of the [ud]2d̄ state as being the Roper resonance N(1440), as suggested by Jaffe and Wilczek.

Original languageEnglish
Pages (from-to)323-329
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume578
Issue number3-4
DOIs
Publication statusPublished - 2004 Jan 8

Fingerprint

sum rules
quantum chromodynamics

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Matheus, R. D. ; Navarra, F. S. ; Nielsen, M. ; Rodrigues Da Silva, R. ; Lee, Su Houng. / Are θ+ and the Roper resonance diquark-diquark-antiquark states?. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2004 ; Vol. 578, No. 3-4. pp. 323-329.
@article{d72d70558e7e40cd8b523dbc2dff72a4,
title = "Are θ+ and the Roper resonance diquark-diquark-antiquark states?",
abstract = "We consider a [ud]2s̄ current in the QCD sum rule framework to study the mass of the recently observed pentaquark state θ+(1540), obtaining good agreement with the experimental value. We also study the mass of the pentaquark [ud] 2d̄. Our results are compatible with the interpretation of the [ud]2d̄ state as being the Roper resonance N(1440), as suggested by Jaffe and Wilczek.",
author = "Matheus, {R. D.} and Navarra, {F. S.} and M. Nielsen and {Rodrigues Da Silva}, R. and Lee, {Su Houng}",
year = "2004",
month = "1",
day = "8",
doi = "10.1016/j.physletb.2003.10.053",
language = "English",
volume = "578",
pages = "323--329",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "3-4",

}

Are θ+ and the Roper resonance diquark-diquark-antiquark states? / Matheus, R. D.; Navarra, F. S.; Nielsen, M.; Rodrigues Da Silva, R.; Lee, Su Houng.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 578, No. 3-4, 08.01.2004, p. 323-329.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Are θ+ and the Roper resonance diquark-diquark-antiquark states?

AU - Matheus, R. D.

AU - Navarra, F. S.

AU - Nielsen, M.

AU - Rodrigues Da Silva, R.

AU - Lee, Su Houng

PY - 2004/1/8

Y1 - 2004/1/8

N2 - We consider a [ud]2s̄ current in the QCD sum rule framework to study the mass of the recently observed pentaquark state θ+(1540), obtaining good agreement with the experimental value. We also study the mass of the pentaquark [ud] 2d̄. Our results are compatible with the interpretation of the [ud]2d̄ state as being the Roper resonance N(1440), as suggested by Jaffe and Wilczek.

AB - We consider a [ud]2s̄ current in the QCD sum rule framework to study the mass of the recently observed pentaquark state θ+(1540), obtaining good agreement with the experimental value. We also study the mass of the pentaquark [ud] 2d̄. Our results are compatible with the interpretation of the [ud]2d̄ state as being the Roper resonance N(1440), as suggested by Jaffe and Wilczek.

UR - http://www.scopus.com/inward/record.url?scp=0346785251&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346785251&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2003.10.053

DO - 10.1016/j.physletb.2003.10.053

M3 - Article

VL - 578

SP - 323

EP - 329

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 3-4

ER -