B->rhopi, rhorho and the measurement of alpha, Patrick Robbe, LAL Orsay

The LHCb experiment is an experiment located at the LHC collider at CERN and which will be 
dedicated mainly to the study of B physics.

Thanks to the performances of the LHCb subdectors, precise measurements related to CP 
violation will be possible with the data recorded by the experiment.

In particular, using the calorimeter system, neutral reconstruction will give access to the 
reconstruction of the decay mode B -> rho pi. Also the large data sample which will be 
available will allow precise measurements of the B -> rho rho decay modes. Both analyses 
will improve the knowledge of the alpha angle of the CKM triangle with the first data of 
LHCb.