Comparative Regge analysis of $\Lambda ,{\Sigma }^0,\Lambda (1520)$ and ${\Theta }^{+}$ production in $\gamma p$, $\pi p$ and $pp$ reactions

Abstract

Using the Quark-Gluon Strings Model -- combined with Regge phenomenology -- we perform a comparative analysis of $\Lambda$, ${\Sigma }^0$, $\Lambda (1520)$ and ${\Theta }^{+}$ production in binary reactions induced by photon, pion and proton beams on the nucleon. We find that the existing experimental data on the $\gamma p\to K^{+}\Lambda$ differential and total cross sections can be described very well by the model for photon energies $1-16$ GeV and $-t<2$ GeV${}^2$ assuming a dominant contribution of the $K^{\ast }$ Regge trajectory. Moreover, using the same parameters we also reproduce the total $\gamma p\to K^{+}{\Sigma }^0$ and $\gamma p\to K^{+}\Lambda (1520)$ cross sections suggesting a 'universality' of the Regge model. In order to check the consistency of the approach we evaluate the differential and total cross sections for the reaction ${\pi }^{-}p\to K^0\Lambda$ which is also found to be dominated by the $K^{\ast }$ Regge trajectory. Using the apparent 'universality' of the Regge model we extend our scheme to the analysis of the binary reactions $\gamma p\to {\bar{K}}^0{\Theta }^{+}$, ${\pi }^{-}p\to K^{-}{\Theta }^{+}$ and $pp\to {\Sigma }^{+}{\Theta }^{+}$ as well as the exclusive and inclusive ${\Theta }^{+}$ production in the reactions $pp\to p{\bar{K}}^0{\Theta }^{+}$ and $pp\to {\Theta }^{+}X$. Our detailed studies demonstrate that ${\Theta }^{+}$ production does not follow the 'universality' principle thus suggesting an essentially different internal structure of the exotic baryon relative to conventional hyperons or hyperon resonances.

11 pages, 13 figures; accepted for publication in Eur. Phys. J. A

References in corpus (8)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Exotica
• Theoretical Overview of the Pentaquark Baryons
• Analysis of Theta^+ production in K^+Xe collisions
• Pentaquark decay is suppressed by chirality conservation
• Phenomenology of spin 3/2 baryons with pentaquarks
• Photoproduction of Pentaquark in Feynman and Regge Theories
• Stable Pentaquarks from Strange Chiral Multiplets

Cited by in corpus (9)

• Photon induced Lambda(1520) production and the role of the K^* exchange
• Regge-plus-resonance treatment of the p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ reactions at forward kaon angles
• Pion induced Reactions for Charmed Baryons
• Differential cross section of gamma n to K+ Sigma- on bound neutrons with incident photons from 1.1 to 3.6 GeV
• Production of strange and charmed baryons in pion induced reactions
• KKbar photoproduction from protons
• Study on the reaction of $\gamma p\to f_1(1285)p$ in Regge-effective Lagrangian approach
• Photo-production of lowest ${\Sigma }_{1/2^{-}}^{\ast }$ state within the Regge-effective Lagrangian approach
• Inclusive pentaquark and strange baryons production in pp and Σp collisions at high energy