1. UCLA High Energy & Astro-Particle (HEAP) Seminar
“Discovery and Precision: The two faces of the LHC physics in the coming years” Presented by Michail Bachtis, CERN
The discovery of the Higgs boson in the first run of the LHC constitutes a triumph of the Standard Model (SM) of particle physics. The priority of the LHC experiments in Run II is to look for deviations of the SM by directly searching for new physics at the new center of mass energy of 13 TeV. A direct search for TeV resonances decaying into a pair of bosons (W,Z,H) where at least one of them decays into jets will be presented. In this boosted regime, the jets are merged into a broad jet. Jets from bosons need to be separated from QCD jets and the techniques used open a new chapter in theory and experiment known as jet substructure.
In case of no discoveries at the LHC, the scale of new physics needs to be probed by precision measurements that are very challenging in a hadron collider. One of the most important measurements to be performed at the LHC is the measurement of the mass of the W boson. The prospects of performing such measurement will be described with emphasis on the experimental challenges and especially on calibrating the momentum scale of 40 GeV muons with a precision of some MeV.
Location: PAB 4-330
Date: Thursday, March 3rd, 2016
Time: 12:30pm
Refreshments at 12:15pm