Book/Report/Dissertation / PhD Thesis

PUBDB-2019-02858

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurement and phenomenology of azimuthal correlations in high transverse momentum multi-jet topologies in CMS at the center-of-mass energy of 13 TeV

Bermudez Martinez, A. (Corresponding author)DESY* ; Jung, H. (Thesis advisor)DESY* ; Gallo-Voss, E. (Thesis advisor)DESY*

2019
Verlag Deutsches Elektronen-Synchrotron Hamburg

This record in other databases:

Please use a persistent id in citations: doi:10.3204/PUBDB-2019-02858

Report No.: DESY-THESIS-2019-013

Abstract: This work addresses the measurements and phenomenology of the azimuthal separation $\Delta\phi_{12}$ between the jets with the largest transverse momenta $(p_T)$ in multi-jet event topologies. The measurements are based on proton-proton collision data at the center-of-mass energy of 13 TeV recorded by the Compact Muon Solenoid (CMS) experiment in 2016, and correspond to an integrated luminosity of 35.9 fb$^{−1}$. The measurements are performed in ranges of the leading jet transverse momentum $(p^{max}_{T})$, covering the range $p^{max}_{T} >$ 200 GeV. Special attention is given to the investigation of the Sudakov region 170° $< \Delta \phi_{12} <$ 180° in inclusive 2- and 3-jet event topologies. This region characterizes nearly back-to-back jet topologies and is sensitive to contributions from soft partonic radiation. The observables are compared to theoretical predictions based on matrix element (ME) calculation at leading- and next-to-leading-order accuracy in perturbative quantum chromodynamics (pQCD) combined with parton showers (PS). Discrepancies of up to 15% are observed for $\Delta \phi_{12} <$ 177°. The measurements are complemented with a wide phenomenological investigation of the PS impact and its subsequent combination with the ME calculation on the $\Delta \phi_{12}$ distribution. The measurements of $\Delta \phi_{12}$ in nearly back-to-back jet topologies for inclusive 2- and 3-jet events are not simultaneously described by any of the theoretical models. Predictions using ME and PS at different accuracies in pQCD provide a similar description of the data.

Note: Dissertation, Universität Hamburg, 2019

---

Contributing Institute(s):

1. LHC/CMS Experiment (CMS)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. LHC: CMS

Appears in the scientific report 2019

---

Database coverage:

---