LHCb's sensitivity to New CP-violating Phases in the Decay Bs→ϕϕB_s \to \phi\phi

This note describes the selection of the Bs->phi(KK)phi(KK) decay channel in LHCb experiment using data produced in Monte Carlo simulation. We expect about 3.1 k signal events in 2 fb^-1 of data with an upper limit on the background to signal ratio, B/S < 0.8 at 90% CL. We also present the sensitivity of this channel to new physics. There are two approaches to test the Standard Model (SM) using this channel: measure the CP asymmetries in a model-independent way and compare them with their SM predictions; or simply assume the SM is valid, measure the total weak phase based on the SM and compare the measurement with the SM prediction. We adopt the latter for this study. The total weak phase can be measured to a statistical precision of 0.11 in 2 fb^-1 of data and 0.05 in 10 fb^-1 of data. This channel thereffore provides a good opportunity to search for physics beyond the SM with new CP-violating phases

Species diversification – which species should we use?

Large detector systems for particle and astroparticle physics; Particle tracking detectors; Gaseous detectors; Calorimeters; Cherenkov detectors; Particle identification methods; Photon detectors for UV. visible and IR photons; Detector alignment and calibration methods; Detector cooling and thermo-stabilization; Detector design and construction technologies and materials. The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of B hadrons at the Large Hadron Collider (LHC) at CERN (Geneva). The initial configuration and expected performance of the detector and associated systems. as established by test beam measurements and simulation studies. is described. © 2008 IOP Publishing Ltd and SISSA