The origin of charged lepton mass with the ATLAS experiment
2018164 pages
Supervisor:
Thesis: PhD - Luigia Elisabetta Barberio
- U. Melbourne (main),
- Melbourne U.
- Published: 2018
URN/HDL:
Experiments:
Citations per year
0 Citations
Abstract: (U. Melbourne (main))
Using high energy proton-proton collisions from the Large Hadron Collider (LHC), the ATLAS experiment is able to probe the decays of the recently discovered Higgs boson. Despite large and complex backgrounds, a significant excess corresponding to the decay of the Higgs boson to charged leptons was observed with the first 25 fb−1 of data at a collision energy of 7-8 TeV. The LHC has now entered its second phase having collected 13.2 fb−1 of data at a collision energy of 13 TeV with the intention to accumulate approximately 3000 fb−1 of data over its operating life. This dataset, or even a fraction thereof, will allow the ATLAS experiment to test the veracity of the Higgs theory of charged lepton mass and to perform precision measurement into the nature of Electroweak symmetry breaking in the Standard Model. A preliminary measurement is presented containing the two most effective decays for probing the origin of charged lepton mass in the Standard Model: H→ ττ and H→ μμ. Preliminary limits are placed on the Higgs–muon coupling at seven times the Standard Model value and a 2σ excess of the di-tau events is observed which is consistent with the Standard Model.- thesis
- p p: scattering
- p p: colliding beams
- lepton: mass
- Higgs particle: leptonic decay
- tau: pair production
- muon: pair production
- energy: high
- electroweak interaction: symmetry breaking
- CERN LHC Coll
References(141)
Figures(0)
- [1]
- [2]
- [3]
- [4]
- [5]
- [6]
- [7]
- [8]
- [9]
- [10]
- [11]
- [12]
- [13]
- [14]
- [15]
- [16]
- [17]
- [18]
- [19]
- [20]
- [21]
- [22]
- [23]
- [24]
- [25]