Hadronic molecules and low-energy hadron-hadron scattering amplitudes

Journal Article · Wed May 10 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.48152· OSTI ID:244482

Barnes, T ^[1]

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1. Physics Division and Center for Computationally Intensive Physics, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6373 (United States)

Recently there has been considerable interest in the subject of molecules, which are weakly bound states of hadron pairs. The question of the existence of molecules is closely related to the more general problem of the determination of low energy hadron-hadron scattering amplitudes, which is widely believed to require nonperturbative methods. In this contribution we report on quark model calculations using a simple perturbative scattering mechanism, one gluon exchange followed by constituent interchange. We refer to the associated diagrams as ``quark Born diagrams``. For the cases chosen to isolate this mechanism, I=2 {pi}{pi}, I=3/2 K{pi} and KN the results are usually in good agreement with experimental S-wave scattering amplitudes given standard quark potential model parameters, and for NN we find essentially standard hard cores from this OGE+CI mechanism. We also discuss our findings for other less familiar channels; these include predictions of vector-vector bound states, one of which may be the {theta}(1710). {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• Sponsoring Organization: USDOE
• OSTI ID: 244482
• Report Number(s): CONF-9405132--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 334; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOUND STATE
HADRON-HADRON INTERACTIONS
HADRONS
MOLECULES
PERTURBATION THEORY
PHASE SHIFT
SCATTERING AMPLITUDES