Strangeness Suppression of q q¯ Creation Observed in Exclusive Reactions

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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.


© 2014 American Physical Society

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Physical Review Letters

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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