Molecular states andexotic mesons
- 19 April 2002
- journal article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 65 (9)
- https://doi.org/10.1103/physrevd.65.096005
Abstract
This work investigates whether the observed 1^-+ exotic mesons are molecular states. We first use a potential model to calculate the spectra and lifetimes of the f_0(980) and a_0(980), taken to be loosely bound molecular states of K Kbar, then apply the same scenario to the 1^-+ exotic states pi_1(1400) and pi_1(1600), assuming them to be pi eta(1295) and pi eta(1440) molecules respectively. We derive the effective potential in the framework of field theory at the hadronic level. Our results indicate that the present data on pi_1(1400) and pi_1(1600) rule out the specific molecular ansatz. We show that the lifetime of a loosely bound heavy-light molecule with enough angular momentum is fully determined by the lifetimes of its constituent mesons.Comment: 23 pages, 1 figure, LaTeKeywords
All Related Versions
This publication has 34 references indexed in Scilit:
- Final state interaction and a light mass “exotic” resonancePhysical Review D, 2002
- (Field) symmetrization selection rulesPhysical Review D, 2001
- The decay of the observed JPC=1−+ (1400) and JPC=1−+ (1600) hybrid candidatesPhysics Letters B, 2001
- Observation of Exotic Meson Production in the ReactionatPhysical Review Letters, 2001
- Evidence for a πη-P-wave in p̄p-annihilations at rest into π0π0ηPublished by Elsevier ,1999
- Observation of a NewExotic State in the ReactionatPhysical Review Letters, 1998
- Interpretation of experimentalexotic signalsPhysical Review D, 1998
- Exotic ηπ state in p̄d annihilation at rest into π−π0ηpspectatorPhysics Letters B, 1998
- Implications of a JPC exoticPhysics Letters B, 1997
- Evidence for Exotic Meson Production in the Reaction atPhysical Review Letters, 1997