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Svenja Karen Pflitsch

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DOI: 10.17863/cam.20495

Pushing the precision frontier at the LHC with V+jets

V+heavy flavor jets and constraints to PDFs

Pushing the precision frontier at the LHC with V+jets

This documents the proceedings from a workshop titled `Illuminating Standard candles at the LHC: V+jets' held at Imperial College London on 25th-26th April 2017. It summarises the numerous contributions to the workshop, from the experimental overview of V+jets measurements at CMS and ATLAS and their role in searching for physics beyond the Standard Model to the status of higher order perturbative calculations to these processes and their inclusion in state of the art Monte Carlo simulations. An executive summary of the ensuing discussions including a list of outcomes and wishlist for future consideration is also presented.

Impact of CMS measurements on Proton Structure and QCD parameters

DOI: 10.48550/arxiv.1802.02100

Pushing the precision frontier at the LHC with V+jets

This documents the proceedings from a workshop titled `Illuminating Standard candles at the LHC: V+jets' held at Imperial College London on 25th-26th April 2017. It summarises the numerous contributions to the workshop, from the experimental overview of V+jets measurements at CMS and ATLAS and their role in searching for physics beyond the Standard Model to the status of higher order perturbative calculations to these processes and their inclusion in state of the art Monte Carlo simulations. An executive summary of the ensuing discussions including a list of outcomes and wishlist for future consideration is also presented.

DOI: 10.1007/978-3-030-52762-4_3

The LHC and the CMS Experiment

High-energy particle accelerators are the most precise microscopes in the world, providing a unique opportunity to study the fundamental building blocks of matter.

DOI: 10.1007/978-3-030-52762-4_5

Measurement of the Associated Production of W + Charm in $$\sqrt{s} = 13$$ TeV Proton–Proton Collisions

This chapter presents the measurement of the associated production of a $$\mathrm {W} ^\pm $$ boson and a charm quark in 13 TeV pp-collisions, using the data collected by the CMS collaboration in 2016, corresponding to an integrated luminosity of 35.7 $$\,\text {fb}^{-1}$$ . It is the main subject of this thesis, together with the interpretation of the results in terms of the proton structure, presented in Chap. 6 .

DOI: 10.1007/978-3-030-52762-4_6

Determination of the Strange Quark Content of the Proton

The results for the associated production of a $$\mathrm {W} ^\pm $$ boson and a charm quark at 13$$\,\mathrm {TeV}$$, presented in the previous chapter, are included in a QCD analysis to illustrate the impact of the measurement on possible constraints of the strange quark content of the proton. The QCD analysis presented in this chapter is performed to NLO accuracy, utilizing the xFitter [1, 2] framework, version 2.0.0. The most recent HERA DIS data in combination with the CMS measurements on the $$\mathrm {W} ^\pm $$ boson asymmetry and $$\mathrm {W} + \mathrm {c} $$ are used.

DOI: 10.1007/978-3-030-52762-4

Associated Production of W + Charm in 13 TeV Proton-Proton Collisions Measured with CMS and Determination of the Strange Quark Content of the Proton

This book measures W+ charm production in proton-proton collisions at the LHC at 13 TeV, as recorded by the Compact Muon Solenoid (CMS) experiment and presents an analysis which focuses on the identification of W bosons in their leptonic decay to a muon and a neutrino

DOI: 10.1007/978-3-030-52762-4_2

Theoretical Overview

This chapter presents the theoretical basics necessary for the extraction of the strange quark content of the proton, which is the main motivation for the measurement of the $$\mathrm {W} + \mathrm {c} $$ production cross section.

DOI: 10.1007/978-3-030-52762-4_1

Improving the understanding of the fundamental particles of matter and their interactions is one of the driving forces of physics research. For this purpose a variety of experimental measurements are conducted to test predictions based on the Standard Model of particle physics or search for novel phenomena.

DOI: 10.1007/978-3-030-52762-4_4

Event Reconstruction

All physics objects, including tracks, jets or muons that are to be used in physics analyses are reconstructed from the signals recorded in the different components of the detector. An illustration of the signals recorded by the CMS detector, originating from different particle types is presented in Fig. 4.1. In this chapter, the algorithms used in the CMS experiment for the reconstruction of physics objects are discussed, with a focus on the ones needed in the $$\mathrm {W} + \mathrm {c} $$ measurement.

DOI: 10.1007/978-3-030-52762-4_7

Summary and Conclusions

In this thesis, the measurement of the associated production of a $$\mathrm {W} ^\pm $$ boson and a charm quark in 13$$\,\mathrm {TeV}$$ pp-collisions at the LHC is described. The impact of these results in improving constraints on the strange quark content of the proton is investigated in a QCD analysis at next-to-leading order, using the xFitter framework.