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

R. D. Matheus; F. S. Navarra; M. Nielsen; R. Rodrigues Da Silva; S. H. Lee

doi:10.1016/j.physletb.2003.10.053

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

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

Department of Physics

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

81 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 language	English
Pages (from-to)	323-329
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	578
Issue number	3-4
DOIs	https://doi.org/10.1016/j.physletb.2003.10.053
Publication status	Published - 2004 Jan 8

Bibliographical note

Funding Information:
This work has been supported by CNPq and FAPESP (Brazil).

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2003.10.053

Cite this

@article{d72d70558e7e40cd8b523dbc2dff72a4,

title = "Are θ+ and the Roper resonance diquark-diquark-antiquark states?",

abstract = "We consider a [ud]2{\=s} 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] 2{\=d}. Our results are compatible with the interpretation of the [ud]2{\=d} 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, {S. H.}",

note = "Funding Information: This work has been supported by CNPq and FAPESP (Brazil).",

year = "2004",

month = jan,

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",