Measurement of the mass splittings between the b anti-b Chi(b,j)(1P) states
Mar, 199811 pages
Published in:
- Phys.Rev.D 59 (1999) 032003
e-Print:
- hep-ex/9803010 [hep-ex]
Report number:
- SLAC-REPRINT-1998-089,
- CLNS-98-1545,
- CLEO-98-5
Experiments:
- CESR-CLEO-II
Citations per year
Abstract:
We present new measurements of photon energies and branching fractions for the radiative transitions: Upsilon(2S)->gamma+chi_b(J=0,1,2). The masses of the chi_b states are determined from the measured radiative photon energies. The ratio of mass splittings between the chi_b substates, r==(M[J=2]-M[J=1])/(M[J=1]-M[J=0]) with M the chi_b mass, provides information on the nature of the bbbar confining potential. We find r(1P)=0.54+/-0.02+/-0.02. This value is in conflict with the previous world average, but more consistent with the theoretical expectation that r(1P)- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10020): electroproduction
- Upsilon(10020): radiative decay
- chi mesons: bottom
- chi mesons: mass
- photon: energy spectrum
- mass difference: ratio
- potential: confinement
- CLEO
References(10)
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