The effective lifetime of the (B) over bar (0)(s) meson in the decay mode (B) over bar (0)(s) -> J / psi f(0)(980) is measured using 1.0 fb(-1) of data collected in p p collisions at root 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 (B) over bar (0)(s) mass eigenstate, Gamma(H) = 0.588 +/- 0.014 +/- 0.009 ps(-1). RI Marconi, Umberto/J-2263-2012; Galli, Domenico/A-1606-2012; Patrignani, Claudia/C-5223-2009; Cardini, Alessandro/J-5736-2012; Teodorescu, Eliza/K-3044-2012; Sarti, Alessio/I-2833-2012
Measurement of the (B)over-bar(s)(0) Effective Lifetime in the J/psi f(0)(980) Final State
Dettori F;Lai A;MANCA, GIULIA;OLDEMAN, RUDOLF GERHARD CHRISTIAAN;SAITTA, BIAGIO;
2012-01-01
Abstract
The effective lifetime of the (B) over bar (0)(s) meson in the decay mode (B) over bar (0)(s) -> J / psi f(0)(980) is measured using 1.0 fb(-1) of data collected in p p collisions at root 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 (B) over bar (0)(s) mass eigenstate, Gamma(H) = 0.588 +/- 0.014 +/- 0.009 ps(-1). RI Marconi, Umberto/J-2263-2012; Galli, Domenico/A-1606-2012; Patrignani, Claudia/C-5223-2009; Cardini, Alessandro/J-5736-2012; Teodorescu, Eliza/K-3044-2012; Sarti, Alessio/I-2833-2012
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