The quirk trajectory

We for the first time obtain the analytical solution for the quirk equation of motion in an approximate way. Based on it, we study several features of quirk trajectory in a more precise way, including quirk oscillation amplitude, number of periods, as well as the thickness of quirk pair plane. Moreover, we find an exceptional case where the quirk crosses at least one of the tracking layers repeatedly. Finally, we consider the effects of ionization energy loss and fixed direction of infracolor string for a few existing searches.

Simulation

This chapter is devoted to Monte Carlo simulation of stochastic processes, both fundamental processes and those involving radiation transport through macroscopic material. The computation of fundamental processes builds on the treatment of rotations and Lorentz transformations from the previous chapter and expands it with a discussion of computational techniques for the evaluation of Feynman diagrams. The simulation of radiation transport covers electromagnetic processes such as ionization energy loss, bremsstrahlung, and pair production. A discussion of real-life challenges in the simulation of radiation transport is included, as well as a brief discussion of simulation toolkits that are available for solving industrial-strength problems. The discussion is intended to give an overview of some of the principal computational and numerical techniques enabling these toolkits.

PARTICLE IDENTIFICATION BY IONIZATION ENERGY LOSS IN THE CMS SILICON STRIP TRACKER

The large sensitive volume of the Silicon Strip Tracker of CMS detector allows, for a typical track, up to 20 samplings of the specific energy loss by ionization, providing a powerful tool for particle identification at low βγ values. We report on the application to hadron identification in the first pp collisions recorded by the CMS detector at [Formula: see text] and 7 TeV and on applications to other CMS analyses, including the search for highly-ionizing exotic particles.