Thinking outside the ROCs: Designing Decorrelated Taggers (DDT) for jet substructure

We explore the scale-dependence and correlations of jet substructure observables to improve upon existing techniques in the identification of highly Lorentz-boosted objects. Modified observables are designed to remove correlations from existing theoretically well-understood observables, providing practical advantages for experimental measurements and searches for new phenomena. We study such observables in $W$ jet tagging and provide recommendations for observables based on considerations beyond signal and background efficiencies

Star Dust

Non-fiction by Barbara Dole

New analyticity constraints on the high energy behavior of hadron-hadron cross sections

We here comment on a series of recent papers by Igi and Ishida[K. Igi and M. Ishida, Phys. Lett B 622, 286 (2005)] and Block and Halzen[M. M. Block and F. Halzen, Phys. Rev D 72, 036006 (2005)] that fit high energy $pp$ and $\bar pp$ cross section and $\rho$-value data, where $\rho$ is the ratio of the real to the imaginary portion of the forward scattering amplitude. These authors used Finite Energy Sum Rules and analyticity consistency conditions, respectively, to constrain the asymptotic behavior of hadron cross sections by anchoring their high energy asymptotic amplitudes--even under crossing--to low energy experimental data. Using analyticity, we here show that i) the two apparently very different approaches are in fact equivalent, ii) that these analyticity constraints can be extended to give new constraints, and iii) that these constraints can be extended to crossing odd amplitudes. We also apply these extensions to photoproduction. A new interpretation of duality is given.Comment: 9 pages, 1 postscript figure; redone for clarity, removal of typos, changing reference; figure replace

FINAL STATE INTERACTIONS OF B→DKB\to DK DECAYS

We study the final state strong interactions of the $B\rightarrow DK$ decay processes, using the Regge model. We conclude that the final state interaction phases are very small, typically a few degrees. Neglecting final state interactions in obtaining the weak decay amplitudes is a good approximation.Comment: 10 pages, standard latex without figure

Development of a Race Simulation to Be Used with Treadmills and Exercise Bikes

ICON Health & Fitness, Inc. has become one of the largest manufacturers of fitness equipment. This company now includes many popular fitness equipment manufacturers like Weider, Weslo, HealthRider, and NordicTrack through various acquisitions and launches of new lines. In 2005, it is projected four million units of fitness equipment will be manufactured by the company (ICON). With the popularity of treadmills and exercise bikes, ICON Health & Fitness added the capability to download exercise programs using its iFit© technology. This allows an audio cable to be plugged into the equipment from a PC and utilizes sound waves to control a treadmill\u27s speed and inclination or an exercise bike\u27s resistance. By mapping a race course with a GPS device, the GPS device could download its readings in a text format to a PC to have the course\u27s elevation and length emulated. With this simulation, a Java program could process it and allow a program to be ran on a Java capable device to control a treadmill or exercise bike utilizing the iFit© technology. This capability would cater to the runners who cannot run a race due to family or work schedules. They could emulate an upcoming race on a treadmill and workout when their schedule permits. In 2005, the Springfield Road Runners of Springfield Illinois sanctioned 18 races for women and 17 races for men to be used for their points\u27 series (Springfield). A member of the Springfield Road Runners can now train for the upcoming race without the worry of running at night or during inconvenient times. With this one example from a running club in a community in Illinois having 18 possible races to download, we see the market possibility when the number of running clubs in the United States is factored into the equation. This capability would also cater to the runner who wishes to run the Boston Marathon, ride in the Tour De France, or other popular races. Instead of qualifying and then joining the 20,000 runners in April for the Boston Marathon, the runner could load up the Java program and see how he would compare against other runners within the race ( Boston ). Once a GPS race is captured, it can be processed to emulate the race and store the simulation in an encrypted format. It will then be available to be purchased and downloaded from a website. A Java program will be available to purchase which will process the downloaded encrypted file and emulate the race on a treadmill or exercise bike

The influence of online store characteristics on consumer impulsive decision-making: A model and empirical application

This study is one of the first to provide insight into the relationships between the online store and consumer impulsive decision-making. We develop a model and show how online store merchandise, ease of use (high task-relevant cues), enjoyment and style (low task relevant cues) relate to online impulse buying. The model is tested using survey data from 532 customers of a Dutch online store. The results show significant effects of merchandise, enjoyment and online store style, mediated by consumers’ emotions and browsing behavior. The study adds to the literature by enhancing our understanding of online impulse buying and by assessing the impact of the online store beyond rational decision-making settings. Keywords: impulsive decision-making, emotions, online store, high task-relevant cues, low task-relevant cues