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Strangeness Suppression of qq¯ Creation Observed in Exclusive Reactions

M. D. Mestayer et al. (CLAS Collaboration)
Phys. Rev. Lett. 113, 152004 – Published 10 October 2014

Abstract

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 qq¯ creation probabilities for the first time in exclusive two-body production, in which only a single qq¯ 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.

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  • Received 15 July 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.152004

© 2014 American Physical Society

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Vol. 113, Iss. 15 — 10 October 2014

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