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Project
Measurement of the charm quark Yukawa coupling with the CMS experiment at the LHC. (FWOTM943)
The Standard Model (SM) of particle physics describes the elementary particles that we have so far discovered, together with the fundamental forces that act amongst them. The only consistent way to describe how particles obtain their mass, is through their interactions with the Brout-Englert-Higgs field, and its corresponding H boson. The discovery of this boson in 2012 marks a milestone for the CMS and ATLAS collaborations that investigate high-energy proton-proton collisions in the Large Hadron Collider (LHC).
The strength of the interaction between the H boson and the massive SM particles is predicted to be proportional to their mass. Motivated by the search for new physics phenomena, it is therefore of crucial importance to measure these interactions precisely. This project focuses on measuring how strong the H boson interacts with the known quarks. Only very recently, the direct observation of the interaction between the H boson and the heaviest, third generation (top and bottom) quarks was made possible. So far, these measurements yield results which are consistent with the SM predictions, though higher accuracy is needed in the future. As a next step it is important to search for evidence of the H boson interacting with the heaviest second generation quark, named the charm quark. The heart of this project comprises a measurement of this charm- Higgs coupling to confirm for the first time the interactions between the H boson and second-generation quarks.
The strength of the interaction between the H boson and the massive SM particles is predicted to be proportional to their mass. Motivated by the search for new physics phenomena, it is therefore of crucial importance to measure these interactions precisely. This project focuses on measuring how strong the H boson interacts with the known quarks. Only very recently, the direct observation of the interaction between the H boson and the heaviest, third generation (top and bottom) quarks was made possible. So far, these measurements yield results which are consistent with the SM predictions, though higher accuracy is needed in the future. As a next step it is important to search for evidence of the H boson interacting with the heaviest second generation quark, named the charm quark. The heart of this project comprises a measurement of this charm- Higgs coupling to confirm for the first time the interactions between the H boson and second-generation quarks.
Date:1 Oct 2019 → 3 Apr 2021
Keywords:Physics
Disciplines:Experimental particle physics, High energy physics, Phenomenological particle physics