Comparative Regge analysis of $Λ, Σ^0, Λ(1520)$ and $Θ^+$ production in $γp$, $πp$ and $pp$ reactions

Physics – Nuclear Physics – Nuclear Theory

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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

Scientific paper

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 $K^*$ 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 $K^*$ 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.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Comparative Regge analysis of $Λ, Σ^0, Λ(1520)$ and $Θ^+$ production in $γp$, $πp$ and $pp$ reactions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Comparative Regge analysis of $Λ, Σ^0, Λ(1520)$ and $Θ^+$ production in $γp$, $πp$ and $pp$ reactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparative Regge analysis of $Λ, Σ^0, Λ(1520)$ and $Θ^+$ production in $γp$, $πp$ and $pp$ reactions will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-5279

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.