Measurement of the lifetime
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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 i1" class="mathmlsrc">i1.gif&_user=111111111&_pii=S0370269316305779&_rdoc=1&_issn=03702693&md5=eb9fe7373a0fa2f9e69955ed5d96d05a">View the MathML sourcei1.gif"> 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 i105" class="mathmlsrc">i105.gif&_user=111111111&_pii=S0370269316305779&_rdoc=1&_issn=03702693&md5=2e683e6a7f29bd499403821400614d11">View the MathML sourcei105.gif"> mass eigenstate. This is the first measurement of the effective lifetime in this decay mode.

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