Abstract

This thesis reports the studies for the a new beam pipe within the ATLAS experiment and of the high mass Drell-Yan (DY) differential cross-section measurement using 4.9 fb-1 of data recorded in 2011. A study using secondary hadronic interaction vertices in the 2010-2012 data indicates excellent stability. A simulation study for the design of a new beam pipe estimates the gain in radiation length when changing the material and shows no significant difference between three positions for a new vacuum flange. For the DY cross-section measurement, the electron identification efficiency is evaluated up to a transverse energy ET of 500 GeV. The results agree well with previous measurements below 50 GeV and Monte Carlo simulations above that. The DY differential cross-section is reported as a function of the electron-positron invariant mass, mee, for 116 - 1500 GeV within the fiducial volume. The results are largely consistent with the theoretical predictions.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.