Strangeness Suppression of q q¯ Creation Observed in Exclusive Reactions
We measured the ratios of electroproduction cross sections from a proton target for three exclusive meson-baryon final states: ΛK+, pπ0, and nπ+, with the CLAS detector at Jefferson Lab. Using a simple model of quark hadronization, we extract q¯q creation probabilities for the first time in exclusive two-body production, in which only a single q¯q pair is created. We observe a sizable suppression of strange quark-antiquark pairs compared to nonstrange pairs, similar to that seen in high-energy production.
Physical Review Letters
Mestayer, M. D.; Biselli, Angela; and CLAS Collaboration, "Strangeness Suppression of q q¯ Creation Observed in Exclusive Reactions" (2014). Physics Faculty Publications. 170.
Mestayer, M. D., K. Park, K. P. Adhikari, M. Aghasyan, S. Anefalos Pereira, J. Ball, M. Battaglieri, Biselli A. et al [CLAS Collaboration]. "Strangeness Suppression of q q¯ Creation Observed in Exclusive Reactions." Physical review letters 113, no. 15 (2014). https://doi.org/10.1103/PhysRevLett.113.152004