Spin-String Interaction in QCD Strings
| dc.creator | Vyas, Vikram | |
| dc.date | 2007-04-20 | |
| dc.date | 2008-08-05 | |
| dc.date.accessioned | 2026-07-07T11:56:39Z | |
| dc.date.available | 2026-07-07T11:56:39Z | |
| dc.description | I consider the question of the interaction between a QCD string and the spin of a quark or an antiquark on whose worldline the string terminates. The problem is analysed from the point of view of a string representation for the expectation value of a Wilson loop for a spin-half particle. A string representation of the super Wilson loop is obtained starting from an effective string representation of a Wilson Loop. The action obtained in this manner is invariant under a worldline supersymmetry and has a boundary term which contains the spin-string interaction. For rectangular loops the spin-string interaction vanishes and there is no spin-spin term in the resulting heavy quark potential. On the other hand if an allowance is made for the finite intrinsic thickness of the flux-tube, by assuming that the spin-string interaction takes place not just at the boundary of the string world-sheet but extends to a distance of the order of the intrinsic thickness of the flux tube, then we do obtain a spin-spin interaction which falls as the fifth power of the distance. Such a term was previously suggested by Kogut and Parisi in the context of a flux-tube model of confinement. | |
| dc.description | 19 pages, 1 figure; Published version with added discussion and references in section 5 | |
| dc.identifier | https://arxiv.org/abs/0704.2707 | |
| dc.identifier | http://arxiv.org/abs/0704.2707 | |
| dc.identifier | Phys.Rev.D78:045003,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.045003 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/205612 | |
| dc.subject | High Energy Physics - Theory | |
| dc.subject | High Energy Physics - Lattice | |
| dc.title | Spin-String Interaction in QCD Strings | |
| dc.type | text |