Roberta Cardinale (INFN - Genova)
Data collected in 2010 at the LHC is used by LHCb to perform the first preliminary mass measurements of b-hadron states fully reconstructed in modes decaying to a J/psi. The systematics on the momentum and mass scales, determined by the level of knowledge and understanding of the tracking system, are addressed. Precise mass measurements for B0, B+, Bs, Bc and Λb are reported. In several cases, competitive or statistically limited results are obtained, implying good prospects for future heavy-flavour spectroscopy measurements. In addition, first studies of excited B hadron states such as the Bs1 and Bs2* states in the B+K- system with the LHCb 2010 dataset will be presented.
Gaia Lanfranchi (INFN - Frascati)