The annihilation decay B_c \to eta' l \nu

We first investigate the semileptonic annihilation decay B_c \to \eta' l\nu in QCD. We find that the $\eta'$ momentum distribution is peaked within its small recoil region due to the loop effects. The branching ratio is estimated to be $Br(B_c \to \eta' l\nu)=1.6\times 10^{-4}$ for $l=\mu,e$, which is accessible at CERN LHC.Comment: Typo corrected. To be published in PR

The effect of postoperative fasting on vomiting in children and their assessment of pain

Mandatory postoperative food intake has been shown to increase nausea and vomiting, and so postoperative fasting has become common practice even if patients request food or drink

Droperidol has comparable clinical efficacy against both nausea and vomiting

Background. Droperidol is commonly noted to be more effective at preventing postoperative nausea (PON) than vomiting (POV) and it is assumed to have a short duration of action. This may be relevant for clinical decisions, especially for designing multiple-drug antiemetic regimens