Astrophysics, Year IV
4C00 Msci final project,
Supervisor: Prof. D. J. Miller
Co-Supervisor: Dr. S. T. Boogert
Report: Investigation of e+e- Luminosity Spectrum
Firas Zenie,
UCL-HEP
Abstract
This project aims to contribute to a full simulation of the TESLA linear collider, by examining the different reconstruction methods for the luminosity spectrum[1][2], and their implications for top quark precision mass measurements.
Luminosity spectra are fully simulated by firstly evaluating beam-beam effects using a modified version of guinea-pig[3], and then simulating bhabha scattering and other QED cross sections using bhwide[4].
We find that one of the reconstruction methods yields useful results in the case of wide scattering angles (100 to 300 mrads), when one photon or less is emitted in the collision. The reconstruction is also enhanced when the momentum loss correlation between the beams is artificially removed.