Phenomenological study of two-meson couplings of Theta+

Abstract

We evaluate two-meson couplings of Theta+, using experimental information of nucleon resonances decaying into pi pi N channels, in which the two pions are in scalar- and vector-type correlations. We examine two assignments of spin and parity of J^P=1/2^+ and 3/2^-, for which the experimental spectra of known resonances with exotic baryons are properly reproduced by an octet-antidecuplet representation mixing scheme. With the obtained coupling constants, total cross sections of the reactions pi- p -> K- Theta+ and K+ p -> pi+ Theta+ are calculated. Substantial interference of two terms may occur in the reaction processes for the J^P=1/2^+ case, whereas the interference effect is rather small for the 3/2^- case.

RevTeX4, 13 pages, 17 figures, 2 tables, Version to appear in Phys. Rev. C

References in corpus (9)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Experimental Search for Pentaquarks
• Lambda(1520,3/2^-) photoproduction reaction via gamma N -> K Lambda(1520)
• Calculation of the bound states of power-law and logarithmic potentials through a generalized pseudospectral method
• Decay of Theta+ in a quark model
• ${\Theta }^{+}$ Hypernuclei
• Phenomenology of spin 3/2 baryons with pentaquarks
• Two-meson cloud contribution to the baryon antidecuplet binding
• Production of ${\Theta }^{+}$ Hypernuclei with the $(K^{+},{\pi }^{+})$ reaction

Cited by in corpus (4)

• Search for Theta+ via pi- p --> K- X reaction near production threshold
• Search for the ${\Theta }^{+}$ pentaquark via the ${\pi }^{-}p\to K^{-}X$ reaction at 1.92 GeV/$c$
• Search for Theta+ via K+p -> pi+X reaction with a 1.2 GeV/c K+ beam
• High-resolution search for the ${\Theta }^{+}$ pentaquark via a pion-induced reaction at J-PARC