Strangeness suppression of qq creation observed in exclusive reactions.
نویسندگان
چکیده
We measured the ratios of electroproduction cross sections from a proton target for three exclusive meson-baryon final states: ΛK(+), pπ(0), 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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عنوان ژورنال:
- Physical review letters
دوره 113 15 شماره
صفحات -
تاریخ انتشار 2014