Description
Focusing on electroweak physics and Higgs boson studies, this track explores precision measurements, Higgs properties, and searches for deviations from Standard Model predictions. Discussions include cross-section measurements, rare decays, and their role in understanding the fundamental forces.
This analysis involves measuring the fiducial differential cross sections of high-mass di-lepton production with two hadronically decaying taus, using the full ATLAS Run-2 data.
One of the main motivations for this analysis is that it provides good sensitivity to a compelling BSM theory (LeptoQuark) that explains the anomalous b-hadron decay fractions observed at both BaBar and LHCb....
This talk will focus on the implications of the excesses observed around 95 GeV in the di-photon and di-tau invariant mass distributions by the CMS collaboration at the LHC, together with the long-standing discrepancy observed around the same mass region at the Large Electron-Positron (LEP) collider in the b-bbar final state. The latest ATLAS search in the di-photon final state reveals an...
The ATLAS Collaboration has recently observed quantum entanglement in top-quark pairs using 13 TeV proton-proton collision data—marking the first observation of entanglement in fundamental quarks and at the highest energy scales ever probed and exposing limitations in state-of-the-art Monte Carlo simulations at the same time. Building on this milestone, this talk will explore new measurements...
The production of lepton pairs in two-photon UltraPeripheral Collision (UPC) draws significant interest for its characteristics of low extra hadronic activities. In particular, the $\gamma\gamma\rightarrow\tau\tau$ process provides a clean channel of tau lepton production. Such a property enables a precise measurement of tau anomalous magnetic moment $a_\tau$, providing a valuable probe of...
High precision measurements of electroweak physics provide compelling tests of the Standard Model. To make such measurements a good understanding of both the detector alignment conditions and the initial state is required. The talk will discuss studies towards both at LHCb. First, a measurement of, and correction for, curvature biases will be presented, based on arxiv:2311.04670. This approach...
Charged Higgs bosons Image appear in many Higgs-sector extensions to the Standard Model (SM). Searches for such a singly-charged Higgs scalar have been carried out at ATLAS and other collaborations, but until now the decay into a W boson and SM-like Higgs Image (ImageGeV) remained unexplored.
Here, we present a search for the decay Image with both Image and Image boosted, using the full ATLAS...
Electroweak physics is foundational to particle physics' Standard Model via the spontaneous symmetry breaking and the emergent Higgs mechanism. Through this, the electroweak parameters can be interpreted as precision tests of the Standard Model with the possibility to suggest new physics.
The LHCb Upgrade I represents a major change for LHCb, including running at an instantaneous luminosity 5...
The abundance of matter over antimatter in the Universe is one the confounding puzzles of modern physics. The Sakharov's conditions require C and CP violation as an essential ingredient to explain the cosmic baryon asymmetry. So far, the only source of CP-violation observed is through the complex phases of the quark mixing (CKM) matrix in the flavour-changing weak interactions. However, the...
