| Thursday 2 May 2024 | |
| Events for day: Wednesday 23 June 2021 |
| 11:00 - 12:00 Wednesday Weekly Seminar-google meet Probing anomalous triple and quartic gauge boson couplings via photon-photon scattering at the LHC School PARTICLES AND ACCELERATORS Abstract: We explore the potential of the LHC to measure the rate of proton-proton collisions through the process of central exclusive production $ pp -> p WW gamma p$ and prob the triple and quartic anomalous gauge boson couplings contributing to this process at the center of mass energy 13 TeV and integrated luminosity 300 fb^(-1). In addition to the presence of two opposite sign leptons, a photon, and missing energy, the distinctive signature of this process is the presence of two intact protons flying few millimeters from the initial beam direction in both sides of the interaction point which suppress the background process effectively. T ... 13:30 - 15:00 Weekly Seminar (Online) Stochastic Magnetogenesis by Parity Violation in the Early Universe https://www.skyroom.online/ch/soa/weekly-seminar School ASTRONOMY In this talk firstly I will briefly review the inflationary cosmology as the most successful model describing the quantum perturbations in the early universe. Then I will explain the stochastic method as a powerful tool to describe these quantum perturbations. In the third part I will talk about the magnetogensis problem in cosmology. Moreover the past efforts such as using a parity violation model in the context of early universe cosmology are going to be discussed as probable solutions. As we will see these efforts are not totally successful to solve the problem without taking into account all quantum effects. As an attempt to solve t ... 14:00 - 15:00 Weekly Seminar Condensed Matter and Statistical Physics Group Spin and charge order in doped spin-orbit coupled Mott insulators: Application to Sr2IrO4 School PHYSICS Abstract: We study an antisymmetric spin-orbit coupling of a two-dimensional single-band Hubbard Hamiltonian. We propose that this is the most basic paradigm for understanding the electrical characteristics of locally noncentrosymmetric transition metal (TM) oxides like Sr2IrO4. Based on exact diagonalizations of small clusters and the random-phase approximation, we investigate the correlation effects on charge and magnetic order as a function of doping and of the TM-oxygen-TM bond angle. For small doping and small-angle, we find dominant commensurate in-plane antiferromagnetic fluctuations, while ferromagnetic fluctuations dominate f ... |