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Measurement of the lifetime
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文摘
Using a data set corresponding to an integrated luminosity of 3 fb−1, collected by the LHCb experiment in pp   collisions at centre-of-mass energies of 7 and 8 TeV, the effective lifetime in the View the MathML source decay mode, τeff, is measured to be
τeff=1.479±0.034 (stat)±0.011 (syst) ps.
Assuming CP   conservation, τeff corresponds to the lifetime of the light View the MathML source mass eigenstate. This is the first measurement of the effective lifetime in this decay mode.

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