Measurement of the Bs effective lifetime in the J/psi fo(980) final state

Abstract : The effective lifetime of the Bs meson in the decay mode Bs->J/\psi fo(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.
Type de document :
Article dans une revue
Physical Review Letters, American Physical Society, 2012, 109, pp.152002. <10.1103/PhysRevLett.109.152002>


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Contributeur : Sabine Starita <>
Soumis le : jeudi 5 juillet 2012 - 14:58:04
Dernière modification le : mardi 11 octobre 2016 - 13:40:55

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R. Aaij, S. Barsuk, O. Callot, J. He, B. Jean-Marie, et al.. Measurement of the Bs effective lifetime in the J/psi fo(980) final state. Physical Review Letters, American Physical Society, 2012, 109, pp.152002. <10.1103/PhysRevLett.109.152002>. <in2p3-00714752>

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