Quark States Near a Threshold
| dc.creator | Bashinsky, S. V. | |
| dc.creator | Jaffe, R. L. | |
| dc.date | 1996-10-17 | |
| dc.date.accessioned | 2026-07-07T04:00:33Z | |
| dc.date.available | 2026-07-07T04:00:33Z | |
| dc.description | We reduce the problem of many-channel hadron scattering at nonrelativistic energies to calculations on the scale of a few fermis. Having thus disentangled kinematics from interior quark dynamics, we study their interplay when a quark state occurs near a hadronic threshold. Characteristic parameters, such as the observed peak width, the decay width, and the shape of a cross-section itself are highly affected by the threshold. A general pole-form expression for the S-matrix in an arbitrary background is given, and the pole structure of S is examined. We show that at a hadronic threshold two poles in S are generally important. We also classify the S-matrix pole structure considering an example where nonsingular coupled channels are closed at the threshold. The framework of our paper is the P-matrix formalism, which is reviewed and extended for use together with conventional methods of computing quark-gluon dynamics. Results and applications are illustrated for the doubly strange two-baryon system, the detailed analysis of which we postpone till our forthcoming paper. | |
| dc.description | 18 pages, 4 figures, RevTeX, uses aps.sty, fps.sty, see also the publication Nucl.Phys.A625:167-191,1997 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9610395 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9610395 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/46583 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Quark States Near a Threshold | |
| dc.type | text |