Hiroshi Nakano ; Hitoshi Yamamoto

2011
Tohoku University Tohoku

Abstract: To search new physics beyond the standard model, upgrade project of KEKB-factory is on the move. In order to gain luminosity, IP beam size become nanometer order. Increment of backgrounds is expected due to gain in beam current and beam density. For the purpose of IR designing, Touschek effect and gas scattering background were simulated for current KEKB and SuperKEKB. The result of current KEKB simulation was compared with experimental data. We confirmed the validity of our simulation framework and obtained detailed under- standing of the background mechanism.

Keyword(s): tau ; beam: density ; accelerator ; asymmetry: CP ; BELLE ; position dependence ; electron: energy ; CP: violation ; time dependence ; particle: scattering ; beam: size ; pressure: dependence ; muon: detector ; upgrade ; longitudinal ; magnetic field ; dispersion ; Monte Carlo ; flux: background ; bending magnet ; effect: relativistic ; momentum ; background: effect ; SVD ; KEK-B ; particle: trajectory ; beam: current ; bremsstrahlung ; beam: background ; beam: phase space ; field strength ; particle: energy ; cryogenics ; particle: velocity ; quadrupole lens ; beam: energy ; scattering: Coulomb ; metal ; B: decay ; magnet ; gas: scattering ; differential cross section ; positron: beam ; particle: classical ; new physics ; crossing ; particle: density ; optics ; solenoid: superconductivity
Note: Presented on 03 02 2011
Note: MSc