CERN - European Organization for Nuclear Research
نویسنده
چکیده
Procedures for correcting the beam-beam effects in luminosity measurement at CLIC at 3 TeV CM energy are described and tested using Monte Carlo simulations: • Correction of the angular counting loss due to the combined Beamstrahlung and initial-state radiation (ISR) effects, based on the reconstructed velocity of the collision frame of the Bhabha scattering. • Deconvolution of the luminosity spectrum distortion due to the ISR emission. • Correction of the counting bias due to the finite calorimeter energy resolution. All procedures were tested by simulation. Bhabha events were generated using BHLUMI, and used in Guinea-PIG to simulate the outgoing momenta of Bhabha particles in the bunch collisions at CLIC. Residual uncertainties after correction are listed in a table in the conclusions. The beam-beam related systematic counting uncertainty in the luminosity peak can be reduced to the order of permille. Presented at: 20th FCAL workshop, Zeuthen, Germany, May 7-9, 2012
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Pablo Saiz University of the West of England, Frenchay Campus Coldharbour Lane, Bristol BS16 1QY, U.K. CERN, European Organization for Nuclear Research, 1211 Geneve 23, Switzerland Predrag Buncic CERN, European Organization for Nuclear Research, 1211 Geneve 23, Switzerland Institut für Kernphysik, August-Euler-Strasse 6, 60486 Frankfurt am Main, Germany Andreas J. Peters CERN, European Organiza...
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