Measurement of the mass splittings between the b(b)over-bar chi(b,J)(1P) states

Measurement of the mass splittings between the b(b)over-bar chi(b,J)(1P) states

We present new measurements of photon energies and branching fractions for the radiative transitions Y(2S)→γχb(J=0,1,2)(1P). The masses of the χb states are determined from the measured radiative photon energies. The ratio of mass splittings between the χb substates, r≡(MJ=2-MJ=1)/(MJ=1-MJ=0), with...

Full description

Bibliographic Details
Main Authors: Edwards, K, Bellerive, A, Janicek, R, MacFarlane, D, Patel, P, Sadoff, A, Ammar, R, Baringer, P, Bean, A, Besson, D, Coppage, D, Darling, C, Davis, R, Kotov, S, Kravchenko, I, Kwak, N, Zhou, L, Anderson, S, Kubota, Y, Lee, S, O'Neill, J, Poling, R, Riehle, T, Smith, A, Alam, MS
Format: Journal article
Language:English
Published: 1999
Description
Summary:We present new measurements of photon energies and branching fractions for the radiative transitions Y(2S)→γχb(J=0,1,2)(1P). The masses of the χb states are determined from the measured radiative photon energies. The ratio of mass splittings between the χb substates, r≡(MJ=2-MJ=1)/(MJ=1-MJ=0), with M the χb mass, provides information on the nature of the bb̄ confining potential. We find r(1P)=0.542 ±0.022±0.024. This value is somewhat lower than the previous world average, but more consistent with the theoretical expectation that r(1P)

Similar Items