Measurement of the Omega(0)(c) Baryon Lifetime

We report a measurement of the lifetime of the c0 baryon using proton-proton collision data at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb-1 collected by the LHCb experiment. The sample consists of about 1000 b-c0-X signal decays, where the c0 baryon is detected in the pK-K- final state and X represents possible additional undetected particles in the decay. The c0 lifetime is measured to be c0=26824102 fs, where the uncertainties are statistical, systematic, and from the uncertainty in the D lifetime, respectively. This value is nearly four times larger than, and inconsistent with, the current world-average value

Measurement of the Lifetime of the Doubly Charmed Baryon Xi(++)(cc)

The first measurement of the lifetime of the doubly charmed baryon \u39ecc++ is presented, with the signal reconstructed in the final state \u39bc+K-\u3c0+\u3c0+. The data sample used corresponds to an integrated luminosity of 1.7 fb-1, collected by the LHCb experiment in proton-proton collisions at a center-of-mass energy of 13 TeV. The \u39ecc++ lifetime is measured to be 0.256-0.022+0.024(stat)\ub10.014(syst) ps

Measurement of Angular and CP Asymmetries in D-0 -> pi(+) pi(-) mu(+) mu(-) and D-0 -> K+ K- mu(+) mu(-) Decays

The first measurements of the forward-backward asymmetry of the dimuon pair (AFB), the triple-product asymmetry (A2\u3c6), and the charge-parity-conjugation asymmetry (ACP), in D0\u2192\u3c0+\u3c0-\u3bc+\u3bc- and D0\u2192K+K-\u3bc+\u3bc- decays are reported. They are performed using data from proton-proton collisions collected with the LHCb experiment from 2011 to 2016, corresponding to a total integrated luminosity of 5 fb-1. The asymmetries are measured to be AFB(D0\u2192\u3c0+\u3c0-\u3bc+\u3bc-)=(3.3\ub13.7\ub10.6)%, A2\u3c6(D0\u2192\u3c0+\u3c0-\u3bc+\u3bc-)=(-0.6\ub13.7\ub10.6)%, ACP(D0\u2192\u3c0+\u3c0-\u3bc+\u3bc-)=(4.9\ub13.8\ub10.7)%, AFB(D0\u2192K+K-\u3bc+\u3bc-)=(0\ub111\ub12)%, A2\u3c6(D0\u2192K+K-\u3bc+\u3bc-)=(9\ub111\ub11)%, ACP(D0\u2192K+K-\u3bc+\u3bc-)=(0\ub111\ub12)%, where the first uncertainty is statistical and the second systematic. The asymmetries are also measured as a function of the dimuon invariant mass. The results are consistent with the standard model predictions