dorsal/arxiv
View SchemaA QCD Sum Rule Study of $\Theta^+$ in Nuclear Matter
| Authors | F. S. Navarra, M. Nielsen, K. Tsushima |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0408072 |
| URL | https://arxiv.org/abs/nucl-th/0408072 |
| DOI | 10.1016/j.physletb.2004.12.016 |
| Journal | Phys.Lett. B606 (2005) 335-341 |
Abstract
We consider a $[ud]^2\bar{s}$ current, in the finite-density QCD sum rule approach, to investigate the scalar and vector self-energies of the recently observed pentaquark state $\Theta^+(1540)$, propagating in nuclear mater. We find that, opposite to what was obtained for the nucleon, the vector self-energy is negative, and the scalar self-energy is positive. There is a substantial cancellation between them resulting in an attractive net self-energy of the same order as in the nucleon case.
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"abstract": "We consider a $[ud]^2\\bar{s}$ current, in the finite-density QCD sum rule\napproach, to investigate the scalar and vector self-energies of the recently\nobserved pentaquark state $\\Theta^+(1540)$, propagating in nuclear mater. We\nfind that, opposite to what was obtained for the nucleon, the vector\nself-energy is negative, and the scalar self-energy is positive. There is a\nsubstantial cancellation between them resulting in an attractive net\nself-energy of the same order as in the nucleon case.",
"arxiv_id": "nucl-th/0408072",
"authors": [
"F. S. Navarra",
"M. Nielsen",
"K. Tsushima"
],
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"nucl-th",
"hep-ph"
],
"doi": "10.1016/j.physletb.2004.12.016",
"journal_ref": "Phys.Lett. B606 (2005) 335-341",
"title": "A QCD Sum Rule Study of $\\Theta^+$ in Nuclear Matter",
"url": "https://arxiv.org/abs/nucl-th/0408072"
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