Type
Text
Type
Dissertation
Advisor
Sterman, George F. | Abhay Deshpande | Marivi Fernandez-Serra | Amarjit Soni.
Date
2010-05-01
Keywords
perturbation, QCD | Physics, Elementary Particles and High Energy -- Physics, Theory
Department
Department of Physics
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/70930
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
In performing perturbative calculations in Quantum Chromodynamics, large logarithmic corrections can arise from processes involving soft and collinear quanta. These corrections can be resummed to all orders, allowing us to improve our control over cross section calculations associated with exclusive and inclusive processes. In this thesis, we show how such logarithmic corrections can appear in perturbative calculations in Quantum Chromodynamics. We then proceed to apply these resummation methods at next-to-leading logarithmic accuracy to heavy quark pair production and light hadron pair production. We show how to incorporate consistently cuts in rapidity and transverse momentum of the observed particles, together with resummation. This allows us to compare our next-to-leading logarithmic calculations directly to experiments by placing the precise experimental cuts associated with the measurements of these processes. We will also examine the phenomenological features associated with the logarithmic corrections. Specifically, we will look how we can apply this to the study jet mass distributions.We will compare jet mass distribution from jets initiated from light quarks to those initiated by top quarks. This will then allow us to build jet shape observables that will let us distinguish between the two.
Recommended Citation
Almeida, Leandro Giordano, "Threshold Resummation in Pair Production" (2010). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 138.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/138