Comparison of Lambda and Sigma(0) Threshold Production in Proton-Proton Collisions
S. Sewerin, G. Schepers, J. T. Balewski, A. Budzanowski, W. Eyrich, M. Fritsch, C. Goodman, D. Grzonka, J. Haidenbauer, C. Hanhart, M. Hofmann, L. Jarczyk, M. Jochmann, A. Khoukaz, K. Kilian, M. K"ohler, T. Lister, P. Moskal, W. Oelert, I. Pellmann, C. Quentmeier, R. Santo, U. Seddik, T. Sefzick, J. Smyrski, F. Stinzing, A. Strzalkowski C. Wilkin, M. Wolke, P. W"ustner, D. Wyrwa
Abstract
Threshold measurements of the associated strangeness production reactions pp --> p K(+) Lambda and pp --> p K(+) Sigma(0) are presented. Although slight differences in the shapes of the excitation functions are observed, the most remarkable feature of the data is that at the same excess energy the total cross section for the Sigma(0) production appears to be about a factor of 28 smaller than the one for the Lambda particle. It is concluded that strong Sigma(0)-p final state interactions, and in particular the Sigma-N --> Lambda-p conversion reaction, are the likely cause of the depletion for the yield in the Sigma signal. This hypothesis is in line with other experimental evidence in the literature.
Create a lesson
Related papers
Physics with Radioactive Ion Beams at the Nuclear Science Laboratory
W. S. Porter, D. W. Bardayan, M. Brodeur et al.
16O(p,γ)17F Reaction and the C and O Isotopic Ratios in Red Giant Branch Stars
D. Robb, P. McGlynn, M. Aliotta et al.
Probing the production mechanisms of virtual photons at RHIC
STAR Collaboration
The 3He(α,γ)7Be γ-ray angular distribution: measured, and calculated by effective field theory
S. Turkat, P. Hempel, X. Zhang et al.
Letter of Intent for Alpha Knockout from Nuclei in Hard Exclusive Processes with ALERT
Whitney R. Armstrong†, Ian Cloët, Fernando A. Flor et al.
Probing high-momentum components in 16O via zero-degree (p,d) cross-section ratios
FRS Experiment Collaboration, X. Wang, H. J. Ong et al.