dorsal/arxiv
View SchemaPlanar versus non-planar anti-NN annihilation into mesons in the light of anti-qq operators and the 1/Nc expansion
| Authors | B. El-Bennich |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0407109 |
| URL | https://arxiv.org/abs/nucl-th/0407109 |
| DOI | 10.1103/PhysRevC.72.067001 |
| Journal | Phys.Rev. C72 (2005) 067001 |
Abstract
It is argued that in the antiproton-proton annihilation into two mesons $\bar pp\longrightarrow m_1 m_2$, the origin of different restrictive angular momentum selection rules commonly obtained for planar annihilation diagrams $A2$ and for non-planar rearrangement diagrams $R2$ lies in the omission of momentum transfer between an annihilated antiquark-quark pair and a remaining quark or antiquark. If it is included, there is no reason for dismissing one type of diagram in favor of another one. Some considerations in the large $N_c$ limit of QCD equally shed light on the planar and non-planar contributions to the total $\bar NN\to m_1 m_2$ annihilation amplitude.
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"abstract": "It is argued that in the antiproton-proton annihilation into two mesons $\\bar\npp\\longrightarrow m_1 m_2$, the origin of different restrictive angular\nmomentum selection rules commonly obtained for planar annihilation diagrams\n$A2$ and for non-planar rearrangement diagrams $R2$ lies in the omission of\nmomentum transfer between an annihilated antiquark-quark pair and a remaining\nquark or antiquark. If it is included, there is no reason for dismissing one\ntype of diagram in favor of another one. Some considerations in the large $N_c$\nlimit of QCD equally shed light on the planar and non-planar contributions to\nthe total $\\bar NN\\to m_1 m_2$ annihilation amplitude.",
"arxiv_id": "nucl-th/0407109",
"authors": [
"B. El-Bennich"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.72.067001",
"journal_ref": "Phys.Rev. C72 (2005) 067001",
"title": "Planar versus non-planar anti-NN annihilation into mesons in the light of anti-qq operators and the 1/Nc expansion",
"url": "https://arxiv.org/abs/nucl-th/0407109"
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