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Measurement of the Bs effective lifetime in the J/psi f0(980) final state
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arxiv 1207.0878 v3 pith:SWZ7JRSH submitted 2012-07-04 hep-ex
Measurement of the Bs effective lifetime in the J/psi f0(980) final state
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The effective lifetime of the Bs meson in the decay mode Bs->J/\psi f0(980) is measured using 1.0/fb of data collected in pp collisions at sqrt(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 Bs mass eigenstate, \Gamma_H = (0.588 +/- 0.014 +/- 0.009)/ps.
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