Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Physics (2)
- Asymptotic-behavior (1)
- Bottom quark (1)
- Charm quark (1)
- Collisions (1)
-
- Education research (1)
- Electric circuits (1)
- Electric resistors (1)
- Expert-novice differences (1)
- Exponentiation (1)
- Eye tracking (1)
- Gauge (1)
- Multiple representations (1)
- Parton distributions (1)
- Problem solving (1)
- Qcd hard scattering (1)
- Renormalization (1)
- Soft gluons (1)
- Top quark (1)
- Wilson loops (1)
Articles 1 - 5 of 5
Full-Text Articles in Physics
Comparing Experts And Novices In Solving Electrical Circuit Problems With The Help Of Eye-Tracking, David Rosengrant, Colin Thomson, Taha Mzoughi
Comparing Experts And Novices In Solving Electrical Circuit Problems With The Help Of Eye-Tracking, David Rosengrant, Colin Thomson, Taha Mzoughi
Faculty and Research Publications
In order to help introductory physics students understand and learn to solve problems with circuits, we must first understand how they differ from experts. This preliminary study focuses on problem-solving dealing with electrical circuits. We investigate difficulties novices have with circuits and compare their work with those of experts. We incorporate the use of an eye-tracker to investigate any possible differences or similarities on how experts and novices solve electrical circuit problems. Our results show similarities in gaze patterns among all subjects on the components of the circuit. We further found that experts would look back at the circuit while …
Two-Loop Soft Anomalous Dimensions With Massive And Massless Quarks, Nikolaos Kidonakis
Two-Loop Soft Anomalous Dimensions With Massive And Massless Quarks, Nikolaos Kidonakis
Faculty and Research Publications
I present results for two-loop soft anomalous dimensions, which are derived from dimensionally regularized diagrams with eikonal quark lines and control soft-gluon emission in hard-scattering processes. Detailed results for the UV poles of the eikonal integrals are shown for massive quarks, and the massless limit is also taken. The construction of soft anomalous dimensions at two-loops allows soft-gluon resummations at NNLL accuracy.
Heavy-Flavor Production At Accelerators, Nikolaos Kidonakis
Heavy-Flavor Production At Accelerators, Nikolaos Kidonakis
Faculty and Research Publications
I discuss heavy flavor production at hadronic facilities. I present total cross sections and differential distributions for top quark, bottom quark, and charm quark production at the rrevatron and LHC colliders, and at fixed-target experiments such as HERA-B. The calculations include complete next-to-leading order corrections as well as higher-order soft-gluon corrections which are important near kinematical threshold.
Higher-Order Corrections To Top-Antitop Pair And Single Top Quark Production, Nikolaos Kidonakis
Higher-Order Corrections To Top-Antitop Pair And Single Top Quark Production, Nikolaos Kidonakis
Faculty and Research Publications
I present the latest results on the theoretical cross section for top-antitop pair production as well as for single top production at the Tevatron and the LHC. The calculations include higher-order soft-gluon corrections which are dominant near threshold. The top quark transverse momentum distribution is also presented.
Two-Loop Soft Anomalous Dimensions And Next-To-Next-To-Leading-Logarithm Resummation For Heavy Quark Production, Nikolaos Kidonakis
Two-Loop Soft Anomalous Dimensions And Next-To-Next-To-Leading-Logarithm Resummation For Heavy Quark Production, Nikolaos Kidonakis
Faculty and Research Publications
I present results for two-loop soft anomalous dimensions for heavy quark production which control soft-gluon resummation at next-to-next-to-leading-logarithm accuracy. I derive an explicit expression for the exact result and study it numerically for top quark production via e(+) e(-) -> t (t) over bar t, and I construct a surprisingly simple but very accurate approximation. I show that the two-loop soft anomalous dimensions with massive quarks display a simple proportionality relation to the one-loop result only in the limit of vanishing quark mass. I also discuss the extension of the calculation to single top and top pair production in hadron …