Measurement of the lifetime
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文摘
Using a data set corresponding to an integrated luminosity of k to view the MathML source">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, k to view the MathML source">τeff, is measured to be
k to view the MathML source">τeff=1.479±0.034 (stat)±0.011 (syst) ps.k.gif">
Assuming CP   conservation, k to view the MathML source">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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