Photoproduction of Pentaquark in Feynman and Regge Theories

Abstract

Photoproduction of the Theta+ pentaquark on the proton is analyzed by using an isobar and a Regge models. The difference in the calculated total cross section is found to be more than two orders of magnitude for a hadronic form factor cut-off Lambda > 1 GeV. Comparable results would be obtained for 0.6 < Lambda < 0.8 GeV. We also calculate contribution of the Theta+ photoproduction to the GDH integral. By comparing with the current phenomenological calculation, it is found that the GDH sum rule favors the result obtained from Regge approach and isobar model with small Lambda.

5 pages, 5 figures, submitted to Phys.Rev.C as a Rapid Communication

References in corpus (4)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• The pentaquark in K-plus-d total cross section data
• Why the Theta+ is seen in some experiments and not in others - a possible explanation
• Comment on the ${\Theta }^{+}$-production at high energy

Cited by in corpus (6)

• Search for the ${\Theta }^{+}$ pentaquark in the reactions $\gamma p\to {\bar{K}}^0{K}^{+}n$ and $\gamma p\to {\bar{K}}^0{K}^{0}p$
• Coherent Theta^+ and Lambda(1520) photoproduction off the deuteron
• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
• Comparative Regge analysis of $\Lambda ,{\Sigma }^0,\Lambda (1520)$ and ${\Theta }^{+}$ production in $\gamma p$, $\pi p$ and $pp$ reactions
• Phenomenological Analysis of Triply Heavy Pentaquarks with configurations $q\Bar{q}QQQ$ and $qqQQ\Bar{Q}$
• Antikaon angular distributions in the reaction $\gamma d\to K^{-}{\Theta }^{+}p\to K^{-}{K}^{+}np$ near the threshold and the parity of the ${\Theta }^{+}$ pentaquark