Empirical test for composite hadrons

Rajasekaran , G. (1972) Empirical test for composite hadrons Physical Review D, 5 (3). 610–623. ISSN 0556-2821

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Official URL: http://prd.aps.org/abstract/PRD/v5/i3/p610_1

Related URL: http://dx.doi.org/10.1103/PhysRevD.5.610


We describe an empirical test to distinguish hadrons which are composites in the low-threshold channels from those which can be understood only from a more global point of view. This test is based on the existence of a pole in the K matrix in the latter case. Thus, the absence of a K pole signals a composite hadron. The test is applicable to hadrons coupled to S-wave two-body channels only. The properties of the K pole are analyzed using a field-theoretic model, and the pole and the residues are related to the wave-function renormalization constant of the hadron. We also construct coupling-constant sum rules which are connected to the test for compositeness. Applications to Λ(1405) and other hadrons are described.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:41106
Deposited On:26 May 2011 12:18
Last Modified:26 May 2011 12:18

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