Triquark-diquark models of a theta(1540)
Conference
·
OSTI ID:836062
The enhancement in the flavour exotic NK channel seen by a number of experiments has been interpreted as a resonant pentaquark state, the {Theta}{sup +}(1540). Theoretical efforts to understand its structure, with the aim of explaining both the low mass and small decay width, have thrown up the possibility of a triquark-diquark P-wave correlation. We will discuss the constituent quark model study of Karliner/Lipkin and suggest that their P-wave excitation energy is an underestimate, a more plausible value raising the {Theta} mass in this model to more than 1700 MeV. We also propose on rather general grounds that these correlated quark models give rise to not only exotic baryon states, but also exotic meson states, in particular the strangeness +2, isoscalar {var_theta}{sup +} which will decay to K{sup +} K{sup 0}.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 836062
- Report Number(s):
- JLAB-THY-05-293; DOE/ER/40150-3045
- Country of Publication:
- United States
- Language:
- English
Similar Records
Decay width of the pentaquark state {theta}{sup +}(1540) with QCD sum rules
Relativistic calculation of the width of the {theta}{sup +}(1540) pentaquark
SU(6), triquark states, and the pentaquark
Journal Article
·
Mon Aug 01 00:00:00 EDT 2005
· Physical Review. D, Particles Fields
·
OSTI ID:20711220
Relativistic calculation of the width of the {theta}{sup +}(1540) pentaquark
Journal Article
·
Wed Jun 01 00:00:00 EDT 2005
· Physical Review. C, Nuclear Physics
·
OSTI ID:20698795
SU(6), triquark states, and the pentaquark
Journal Article
·
Tue Apr 01 00:00:00 EDT 2008
· Physical Review. D, Particles Fields
·
OSTI ID:21249941