Top Quark Pair Production In Early Cms Data
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Top Quark Pair Production in Early CMS Data
We present an alternative method to extract the tt[Superscript -] cross-section from the muon plus jets channel in pp collisions at [Special characters omitted.] = 7 TeV. In addition to a standard baseline selection, we also study the use of topological constraints to improve the measurement. Using the full 2010 dataset we obtain a result of 160.4 ± 15.0[Special characters omitted.] (syst) ± 6.4(lumi) pb from our baseline analysis. By applying two different additional topological constraints this becomes 153.3 ± 17.3[Special characters omitted.] (syst) ± 6.1(lumi) pb and 156.5 ± 23.7[Special characters omitted.] (syst) ± 6.3(lumi) pb.
First Measurement of the Running of the Top Quark Mass
Author: Matteo M. Defranchis
language: en
Publisher: Springer Nature
Release Date: 2022-01-03
In this thesis, the first measurement of the running of the top quark mass is presented. This is a fundamental quantum effect that had never been studied before. Any deviation from the expected behaviour can be interpreted as a hint of the presence of physics beyond the Standard Model. All relevant aspects of the analysis are extensively described and documented. This thesis also describes a simultaneous measurement of the inclusive top quark-antiquark production cross section and the top quark mass in the simulation. The measured cross section is also used to precisely determine the values of the top quark mass and the strong coupling constant by comparing to state-of-the-art theoretical predictions. All the theoretical and experimental aspects relevant to the results presented in this thesis are discussed in the initial chapters in a concise but complete way, which makes the material accessible to a wider audience.
Proceedings of the XXV DAE-BRNS High Energy Physics (HEP) Symposium 2022, 12–16 December, Mohali, India
This book presents the proceedings of the XXV DAE-BRNS High Energy Physics (HEP) Symposium 2022, held at the Indian Institute of Science Education and Research Mohali, India. This proceeding marks the 25th edition. The latest results covering both the theoretical and the experimental aspects of the HEP research were presented under 10 broad topics ranging from Astroparticle and cosmology to Higgs and top quark physics, namely (1) article Astrophysics and Cosmology, (2) Beyond Standard Model Physics, (3) Formal Theory, (4) Detector Development Future Facilities and Experiments, (5) Relativistic Heavy-Ion Physics and QCD, (6) Higgs Physics, (7) Quark and Lepton Flavor Physics, (9) Societal Applications: Medical Physics, Imaging, and (10) Top Quark and EW Physics.