K. E. K. Gerndt

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Using the HERA B detector, the bb production cross section has been measured in 920 GeV proton collisions on carbon and titanium targets. The bb production was tagged via inclusive bottom quark decays into J/ψ by exploiting the longitudinal separation of J/ψ → l+l− decay vertices from the primary proton-nucleus interaction. Both e+e− and μ+μ− channels have(More)
BACKGROUND Previous studies of maternal, fetal, and neonatal complications of measles during pregnancy suggest the possibility of increased risk for morbidity and mortality. In 2009-2011, a nationwide laboratory-confirmed measles outbreak occurred in Namibia, with 38% of reported cases among adults. This outbreak provided an opportunity to describe clinical(More)
Using data collected by the HERA-B experiment, we have measured the fraction of J/ψ’s produced via radiative χc decays in interactions of 920 GeV protons with carbon and titanium targets. We obtained Rχc = 0.32±0.06stat±0.04sys for the fraction of J/ψ from χc decays averaged over protoncarbon and proton-titanium collisions. This result is in agreement with(More)
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