Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2001-03-15
Phys.Rev.D64:097505,2001
Physics
High Energy Physics
High Energy Physics - Lattice
4 pages, 2 figures, minor corrections and added references
Scientific paper
10.1103/PhysRevD.64.097505
We present a dynamical lattice calculation with 2 flavours for bottomonium states with an additional gluonic excitation. Using improved actions for the quarks and gauge fields at a lattice spacing of $a \approx 0.1$ fm, we find 10.977(61)(62) GeV for the energy of the lowest lying $b\bar bg$-hybrid, where the first error is statistical and the second denotes the systematic uncertainty due to the determination of scale. In a parallel quenched simulation we demonstrate explicitly that vacuum polarisation effects are less than 10% of the splitting with the ground state.
Aoki Sadao
Burkhalter Rudolf
Ejiri Shinji
Fukugita Masaaka
Hashimoto Shigehira
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