Production asymmetries of b and c hadrons at LHCb

Using a data sample corresponding to an integrated luminosity of 1.0 fb-1, collected by LHCb in pp collisions at a centre-of-mass energy of 7 TeV, the D+, D+, B0 and Bs0 production asymmetries are determined. These quantities are measured by means of Ds+ -> phi(K+K-)pi+, D+ -> ’Ks0(pi+pi-)pi+, B 0 ->†’J/psi(mu+mu-)K*—0(K+ pi-), B0 ->’ D-(K+pi-pi-)pi+ and Bs0 -> †’Ds-(K+K-pi€-)pi+ decays. Moreover, using the full LHCb Run 1 integrated luminosity, corresponding to 1.0 fb-1 at 7 TeV and 2.0 fb-1 at 8 TeV, the production and decay asymmetry of the L0b baryon, APD(L0b), is determined by means of L0b -> †’J/psi(mu+mu-)pK- decays. All asymmetries are measured as a function of p T and y (or eta in the D +, B0 and Bs0 cases) of the involved hadrons, in order to check if there is a dependence on kinematics.