dc.creator | Liu, W. | |
dc.creator | Ko, Che Ming | |
dc.creator | Kubarovsky, V. | |
dc.date.accessioned | 2011-09-13T21:27:52Z | |
dc.date.available | 2011-09-13T21:27:52Z | |
dc.date.issued | 2004 | |
dc.identifier.citation | W. Liu, Che Ming Ko and V. Kubarovsky. Phys.Rev.C 69 025202 2004. "Copyright (2004) by the American Physical Society." | en |
dc.identifier.uri | http://dx.doi.org/10.1103/PhysRevC.69.025202 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/126949 | |
dc.description | Journals published by the American Physical Society can be found at http://publish.aps.org/ | en |
dc.description.abstract | The cross section for theta(+) production from the reaction gammap-->pi(+)K(-)theta(+), which was observed in the CLAS experiment at the Jefferson National Laboratory, is evaluated in a hadronic model that includes couplings of theta(+) to both KN and K*N. With their coupling constants determined from the empirical piNN(1710) and rhoNN(1710) coupling constants using the SU(3) symmetry, the cross section for this reaction has been evaluated by taking theta(+) to have spin 1/2 and isospin 0 but either positive or negative parity. We find that if theta(+) has positive parity as predicted by the chiral soliton model and the correlated quark model, the cross section is 50-110 nb, depending on the value of the K*Ntheta coupling. The cross section is reduced by more than a factor of 10 if theta(+) has negative parity as given by lattice QCD studies and the uncorrelated quark model. For both parities, the differential cross section peaks at small negative four-momentum transfer when the reaction is dominated by the t-channel kaon-exchange diagram that involves only the coupling of theta(+) to KN. After decreasing with increasing negative four-momentum transfer, the differential cross section increases again when the u-channel contribution due to intermediate theta(+) propagation becomes important at large negative four-momentum transfer. | en |
dc.language.iso | en | |
dc.publisher | American Physical Society | |
dc.subject | CONSTITUENT QUARK-MODEL | en |
dc.subject | POSITIVE-STRANGENESS | en |
dc.subject | STATES | en |
dc.subject | BARYON | en |
dc.subject | PHOTOPRODUCTION | en |
dc.subject | RESONANCE | en |
dc.subject | Physics | en |
dc.title | Pentaquark Theta(+) production from the reaction gamma p ->pi K-+(-)Theta(+) | en |
dc.type | Article | en |
local.department | Physics and Astronomy | en |