A simultaneous measurement of the $b$-tagging efficiency scale factor and the $t\bar{t}$ Production Cross Section at the Collider Detector at Fermilab

Hussain, Nazim ; U., /McGill

Fermi National Accelerator Laboratory

关键词: Production Experiment-Hep;    Efficiency;    Cross Sections;    72 Physics Of Elementary Particles And Fields;    Fermilab Collider Detector;   

DOI  :  10.2172/1020302
RP-ID  :  FERMILAB-MASTERS-2011-02
RP-ID  :  AC02-07CH11359
RP-ID  :  1020302

美国|英语

来源: UNT Digital Library

【 摘 要 】

The ability to compare results between Monte Carlo and data is imperative in modern experimental high-energy physics analyses. The b-tagging efficiency Scale Factor (SF) allows for an accurate comparison of b quark identification in data samples and Monte Carlo. This thesis presents a simultaneous measurement of the SF for the SecVtx algorithm and the t{bar t} production cross section using 5.6 fb{sup -1} of p{bar p} collision data at {radical}s = 1.96 TeV collected by the Collider Detector at Fermilab (CDF) experiment. The t{bar t} cross section was measured to be 7.26 {+-} 0.47 pb, consistent with prior CDF analyses. The tight SF value was measured to be 0.925 {+-} 0.032 and the loose SF value was measured at 0.967 {+-} 0.033. These are the most precise SF SecVtx measurements to be performed at CDF to date.