Pentaquark + production from photon-nucleon reactions Academic Article uri icon


  • Pentaquark + baryon production from photon-nucleon reactions is studied in a hadronic model that uses empirical hadron masses and coupling constants as well as includes both heta; and K*N couplings. Taking g K N = 3.0 corresponding to a + width of 9 MeV, g K* N = g K N , and a cutoff parameter = 1.2 GeV in form factors, both the + total production cross section and angular distribution are evaluated. For the reaction p K 0 +, the total cross section for producing a positive parity + is about 300 nb at photon energy E = 3 GeV, comparable to the quoted cross section from the SAPHIR experiment at Bonn Electron Stretcher Accelerator. The cross sections for the other reactions n K - +, p K *0 +, and n K*- + at E = 3 GeV are about 250 nb, 125 nb, and 1350 nb, respectively, if the parity of + is positive. The angular distributions of produced + in these reactions all peak at forward angles. For negative parity +, the total cross sections for these reactions are reduced by more than an order of magnitude, while their angular distributions remain forward peaked. Elsevier B.V. All rights reserved.

published proceedings


author list (cited authors)

  • Liu, W., & Ko, C. M.

citation count

  • 11

publication date

  • September 2004