Pure Samples of Quark and Gluon Jets at the LHC

Having pure samples of quark and gluon jets would greatly facilitate the study of jet properties and substructure, with many potential standard model and new physics applications. To this end, we consider multijet and jets+X samples, to determine the purity that can be achieved by simple kinematic cuts leaving reasonable production cross sections. We find, for example, that at the 7 TeV LHC, the pp {\to} {\gamma}+2jets sample can provide 98% pure quark jets with 200 GeV of transverse momentum and a cross section of 5 pb. To get 10 pb of 200 GeV jets with 90% gluon purity, the pp {\to} 3jets sample can be used. b+2jets is also useful for gluons, but only if the b-tagging is very efficient.Comment: 19 pages, 16 figures; v2 section on formally defining quark and gluon jets has been adde

Multivariate discrimination and the Higgs + W/Z search

A systematic method for optimizing multivariate discriminants is developed and applied to the important example of a light Higgs boson search at the Tevatron and the LHC. The Significance Improvement Characteristic (SIC), defined as the signal efficiency of a cut or multivariate discriminant divided by the square root of the background efficiency, is shown to be an extremely powerful visualization tool. SIC curves demonstrate numerical instabilities in the multivariate discriminants, show convergence as the number of variables is increased, and display the sensitivity to the optimal cut values. For our application, we concentrate on Higgs boson production in association with a W or Z boson with H -> bb and compare to the irreducible standard model background, Z/W + bb. We explore thousands of experimentally motivated, physically motivated, and unmotivated single variable discriminants. Along with the standard kinematic variables, a number of new ones, such as twist, are described which should have applicability to many processes. We find that some single variables, such as the pull angle, are weak discriminants, but when combined with others they provide important marginal improvement. We also find that multiple Higgs boson-candidate mass measures, such as from mild and aggressively trimmed jets, when combined may provide additional discriminating power. Comparing the significance improvement from our variables to those used in recent CDF and DZero searches, we find that a 10-20% improvement in significance against Z/W + bb is possible. Our analysis also suggests that the H + W/Z channel with H -> bb is also viable at the LHC, without requiring a hard cut on the W/Z transverse momentum.Comment: 41 pages, 5 tables, 29 figure

Journal of Applied Communications vol. 99 (3) Full Issue

Journal of Applied Communications vol. 99 (3) - Full Issu

Editorial board, information for authors, and other front matter

This content includes the front cover, the table of contents, editorial and other information for authors for vol. 98, no. 2 (2014) of Journal of Applied Communication

Editorial board, information for authors, and other front matter

This content includes the front cover, the table of contents, editorial and other information for authors for vol. 99, no. 2 (2015) of Journal of Applied Communication

Editorial board, information for authors, and other front matter

This content includes the front cover, the table of contents, editorial and other information for authors for vol. 98, no. 1 (2014) of Journal of Applied Communication

Journal of Applied Communications vol. 98 (2) Full Issue

Journal of Applied Communications vol. 98 (2) - Full Issu

Editorial board, information for authors, and other front matter

Table of contents, editorial, and other information for authors for vol. 101, no. 2 (2017) of Journal of Applied Communication

Interactive SMART Board Techology: Does it Promote Individual Student Academic Achievement?

The purpose of this two-phase, sequential mixed methods study will be to explore academic stimulation with the intent of using this information to develop and test an intrinsic relationship between SMART Board technology and academic achievement. The first phase will be a qualitative exploration of student stimulation by collecting observational data within a high school mathematics classroom. Themes from this qualitative data will then be developed into an instrument so that the integration of SMART Board technology in Math Education can be compared to student stimulation and academic achievement. The integration of technology in education is very controversial. Is technology essential to promote student development? The integration of technology is widely seen as a differentiated approach toward teaching pedagogy. However, there is a lack of consistency in the evaluation of technology. This study is important to both the worlds of general education and mathematics education. There is a gap in information and findings regarding technological contributions to the academic sti1nulation and successes of students. Many claims have been made supporting the advantages and disadvantages of technology in the classroom. This study will measure technology as a tool impacting student stimulation and academic achievement. This study is intended to develop answers to questions teachers may have about the link between technology and academic successes in the classroom. The goal of this study is to provide a better understanding of the impact of technology, SMART Board specific, on educational enhancement and development.SUNY BrockportEducation and Human DevelopmentMaster of Science in Education (MSEd)Education and Human Development Master's These