Dissertation/Thesis Abstract

Discovery of the Bc(2S ) Meson and Development of Pixel Detectors for Future Particle Collider Experiments
by Wang, Rui, Ph.D., The University of New Mexico, 2014, 179; 3630359
Abstract (Summary)

This work involves an analysis of data recorded at the Large Hadron Collider combined with a program to develop detectors for future collider experiments.

Using the full 4.9 fb-1 of 7 TeV data collected in 2011 and the 19.2 fb-1 of 8 TeV data collected in 2012, the B c(2S) meson has been observed with the ATLAS detector in the hadronic decay mode Bc(2S)→ Bcπ+π-, B c→J/ψπ. This new state has been found in the mass difference distribution with invariant mass 6842±7stat. ±4syst. MeV. To prepare for the high radiation environment at the High Luminosity LHC, diamond sensors are being developed. Their leakage current and resistivity are measured at fluences and temperatures relevant to the ATLAS upgrade. No evidence of dependence of the resistivity on fluence or temperature has been observed for the ranges [-10 °C, +20 °C] and [0, 1.0 × 1016 neq/cm2]. To study the radiation damage of the sensors in the ATLAS Pixel Detector, their leakage current is monitored at the level of single pixel modules. The result agrees with a prediction based on the Hamburg model.

Indexing (document details)
Advisor: Seidel, Sally
Commitee: Allahverdi, Rouzbeh, Errede, Steven M., Gorelov, Igor, Seidel, Sally
School: The University of New Mexico
Department: Physics
School Location: United States -- New Mexico
Source: DAI-B 75/11(E), Dissertation Abstracts International
Subjects: Particle physics
Keywords: ATLAS, Bc meson, Diamond sensor, Large hadron collider, Pixel detector
Publication Number: 3630359
ISBN: 9781321082036
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