Measurement Ofψ(2s)radiative Decays
Physical review letters(2007)
摘要
Using 14x10(6) psi(2S) events accumulated at the BESII detector, we report first measurements of branching fractions or upper limits for psi(2S) decays into gamma p (p) over bar, gamma 2(pi(+)pi(-)), gamma(KSK+)-K-0 pi(-)+c.c., gamma K+K-pi(+)pi(-), gamma(KK-)-K-*0 pi(+)+c.c., gamma K-*0(K) over bar (*0), gamma pi(+)pi(-)p (p) over bar, gamma 2(K+K-), gamma 3(pi(+)pi(-)), and gamma 2(pi(+)pi(-))K+K- with the invariant mass of hadrons below 2.9 GeV/c(2). We also report branching fractions of psi(2S) decays into 2(pi(+)pi(-))pi(0), omega pi(+)pi(-), omega f(2)(1270), b(1)(+/-)pi(-/+), and pi(0)2(pi(+)pi(-))K+K-.
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