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
Direct measurement of the in-medium η mass spectrum through the γγ decay channel
Y. Matsumura, N. Muramatsu, T. A. Hashimoto et al.
STAR Highlights II: Study of Small Systems and the Search for New, Exotic Physics
Jiangyong Jia
Cluster emission and its impact on the r-process nucleosynthesis
Natalia Thomas, Silvia Bara, Thomas Elias Cocolios et al.
Core Breaking at Low Spin in 68Zn from Nuclear Resonance Fluorescence
S. R. Johnson, R. V. F. Janssens, B. A. Brown et al.
Isoscalar Giant Resonances in the even-A Pd Isotopes
J. Arroyo, U. Garg, T. Furuno et al.
Efficient production of 229m,gTh via neutron capture in VUV-transparent crystals
Zhong-yi Chen, Hao-yang Lan, Di Wu et al.