Conveners
Monday: MON-AM - LHC
- Fabrizio Caola
Monday: MON-PM - LHC and Dark Matter
- Roger Rusack (University of Minnesota (US))
Recent results on Higgs boson physics by the CMS collaboration will be presented. Emphasis will be put on measurements and searches exploiting the full statistical power of the dataset, heavily using machine learning techniques, collected during run2 of the LHC. The 138 fb^-1 of integrated luminosity gathered provide access to previously unreachable levels of precision, both in the measurement...
With the full Run 2 pp collision dataset collected at 13 TeV, very detailed measurements of Higgs boson properties and its interactions can be performed using its decays into bosons and fermions, shining light over the electroweak symmetry breaking mechanism. This talk presents the latest measurements of the Higgs boson properties by the ATLAS experiment in various decay channels, including...
In the Standard Model, the ground state of the Higgs field is not found at zero but instead corresponds to one of the degenerate solutions minimising the Higgs potential. In turn, this spontaneous electroweak symmetry breaking provides a mechanism for the mass generation of nearly all fundamental particles. The Standard Model makes a definite prediction for the Higgs boson self-coupling and...
Many new physics models predict the existence of Higgs-like particles decaying into two bosons (W, Z, photon, or Higgs bosons) making these important signatures in the search for new physics. Searches for Vγ, VV, and VH resonances have been performed in various final states. In some of these searches, jet substructure techniques are used to disentangle the hadronic decay products in highly...
The remarkably large integrated luminosity collected by the ATLAS detector at the highest proton-proton collision energy provided by LHC allows to use the large sample of top quark events to test theoretical predictions with unprecedented precision. Using data taken with the ATLAS detector at the LHC, recent measurements of total and differential top-quark cross sections as well properties of...
The high center-of-mass energy of proton-proton collisions and the high integrated luminosities at the CERN Large Hadron Collider make it possible to study rare processes of the Standard Model (SM) with unprecedented precision and search for new physics that might enhance extremely rare processes in the SM. Measurements of rare SM processes provide new tests of the SM predictions with the...
Due to interference between particles involved in the production of top quark pairs in hadron collisions, top quarks are produced preferentially in the center of the LHC’s collisions, while antitop quarks are produced preferentially at larger angles. This central–forward charge asymmetry can be altered by several BSM processes. In this report, we will discuss the measurement of the charge...
Various theories beyond the Standard Model predict new, long-lived particles with unique signatures which are difficult to reconstruct and for which estimating the background rates is also a challenge. Signatures from displaced and/or delayed decays anywhere from the inner detector to the muon spectrometer, as well as those of new particles with fractional or multiple values of the charge of...
With the planned high-luminosity upgrade of the LHC increasing the number of simultaneous collisions per bunch crossing by at least a factor of four, the experiments at the LHC will need new handles to keep the trigger rate at manageable levels. To this end, the CMS detector plans to incorporate tracking information as part of its Level-1 trigger system for the phase 2 upgrade. We present here...
The High-Luminosity LHC will open an unprecedented window on the weak-scale nature of the universe, providing high-precision measurements of the standard model as well as searches for new physics beyond the standard model. Such precision measurements and searches require information-rich datasets with a statistical power that matches the high-luminosity provided by the Phase-2 upgrade of the...
A data sample containing top quark pairs produced in association with a boosted \PZ or Higgs boson is used to search for signs of new physics within the framework of effective field theory (EFT). The data correspond to an integrated luminosity of $138\fbinv$ of proton-proton collisions produced at a center-of-mass energy of 13 TeV at the LHC and collected by the CMS experiment. Selected...
Supersymmetry is one of the best motivated and studied Standard Model (SM) extensions, thanks to its elegant solutions to several aspects not addressed by the SM. Naturalness arguments for weak-scale supersymmetry allow supersymmetric partners of the gluons and third generation quarks with masses light enough to be produced at the LHC. The latest results of searches conducted by the ATLAS...
R-parity violating (RPV) Supersymmetry (SUSY) is one of the least constrained SUSY scenarios, despite being well theoretically motivated. The ATLAS Experiment is exploiting the full-Run-2 dataset to carry out searches for RPV SUSY and close the remaining gaps, and in this talk we present on overview of the recent public results targeting this scenario.
The Compact Muon Solenoid (CMS) detector at the CERN Large Hadron Collider (LHC) is undergoing an extensive Phase II upgrade program to prepare for the challenging conditions of the High-Luminosity LHC (HL-LHC). In particular, a new timing layer with hermetic coverage up to a pseudo-rapidity of |η|=3 will measure minimum ionizing particles (MIPs) with a time resolution of ~30ps. This MIP...
The primary goal of the proposed DARWIN observatory is to explore the entire experimentally accessible WIMP dark matter parameter space down to irreducible neutrino backgrounds. With its 40t active liquid xenon target, low-energy threshold, and ultra-low background conditions, DARWIN will have unprecedented sensitivity to spin-independent WIMP-nucleon cross-sections down to ~10⁻⁴⁹ cm² at WIMP...
