Nucleon-Quark Diquark-exchange Interaction
Fuente:
arXiv
Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866913915011596288 |
|---|---|
| author | Rijken, Th. A. |
| author_facet | Rijken, Th. A. |
| contents | In this note the nucleon-quark diquark-exchange interaction is derived using the Feynman-propagator for axial-vector diquark (D) exchange. The Feynman diquark propagator is derived and the result is a (-)-sign difference w.r.t. quark-antiquark exchange. This is due to the (-)-sign for a closed fermion loop, present in for example vector and axial-vector quark-antiquark exchange, but absent in the case of D-exchange. The calculations in these notes follow closely those for vacuum polarisation in the literature. Taking into account that the diquark D is a color $\left{\bar{3}_c\right\}$-state giving a factor +2. The result is an effective axial-vector diquark propagator. Application to $QN \rightarrow NQ$ gives a repulsive potential, which has been used in mixed nuclear-quark matter calculation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_22079 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nucleon-Quark Diquark-exchange Interaction Rijken, Th. A. Nuclear Theory High Energy Physics - Phenomenology In this note the nucleon-quark diquark-exchange interaction is derived using the Feynman-propagator for axial-vector diquark (D) exchange. The Feynman diquark propagator is derived and the result is a (-)-sign difference w.r.t. quark-antiquark exchange. This is due to the (-)-sign for a closed fermion loop, present in for example vector and axial-vector quark-antiquark exchange, but absent in the case of D-exchange. The calculations in these notes follow closely those for vacuum polarisation in the literature. Taking into account that the diquark D is a color $\left{\bar{3}_c\right\}$-state giving a factor +2. The result is an effective axial-vector diquark propagator. Application to $QN \rightarrow NQ$ gives a repulsive potential, which has been used in mixed nuclear-quark matter calculation. |
| title | Nucleon-Quark Diquark-exchange Interaction |
| topic | Nuclear Theory High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2506.22079 |