The effective lifetime of the B̅ s0 meson in the decay mode B̅ s0→J/ψf0(980) is measured using 1.0 fb-1 of data collected in pp collisions at √s=7 TeV with the LHCb detector. The result is 1.700±0.040±0.026 ps, where the first uncertainty is statistical and the second systematic. As the final state is CP-odd, and CP violation in this mode is measured to be small, the lifetime measurement can be translated into a measurement of the decay width of the heavy B̅ s0 mass eigenstate, ΓH=0.588±0.014±0.009 ps-1.
Measurement of the B[over ¯]_{s}^{0} Effective Lifetime in the J/ψf_{0}(980) Final State
CARDINALE, ROBERTA;FONTANELLI, FLAVIO;PATRIGNANI, CLAUDIA;PETROLINI, ALESSANDRO;SANNINO, MARIO;
2012
Abstract
The effective lifetime of the B̅ s0 meson in the decay mode B̅ s0→J/ψf0(980) is measured using 1.0 fb-1 of data collected in pp collisions at √s=7 TeV with the LHCb detector. The result is 1.700±0.040±0.026 ps, where the first uncertainty is statistical and the second systematic. As the final state is CP-odd, and CP violation in this mode is measured to be small, the lifetime measurement can be translated into a measurement of the decay width of the heavy B̅ s0 mass eigenstate, ΓH=0.588±0.014±0.009 ps-1.
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