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Data Acquisition with SoC/SoM for the Phase-2 Upgrade of the LHC
No full textBased on the SoM survey and presentations at the SoC workshops and interest group meetings I have prepared a draft on what the DAQ system for the Phase-2 LHC could be based on in the experiments (only ATLAS and CMS intend to use SoMs). So, I am thinking of showing what options we have in terms of operating system, booting&network, infrastructure management, and user application software. My aim is to provide an overview of the common tools and solutions, as well as some of the work on the ATLAS L1CT, which is a testbed for Phase-2 developments with SoC/SoM
Bootstrapping Black Holes
No full textI will review developments in the “matrix bootstrap” program, a technique for solving large N, strongly coupled quantum systems. I will describe bootstrap bounds on the BFSS matrix theory, which in the planar limit is dual to a particular 10d black hole. I will discuss prospects for using the matrix bootstrap to study properties of the black hole that go beyond general relativity.</p
Measurement of the multiplicity dependence of \mitΥ production ratios in collisions at TeV
No full textThe \mit{\Upsilon}(\mathrm{2}S) and \mit{\Upsilon}(\mathrm{3}S) production cross-sections are measured relative to that of the \mit{\Upsilon}(\mathrm{1}S) meson, as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy of TeV. The measurement uses data collected by the LHCb experiment in 2018 corresponding to an integrated luminosity of 2 . Both the \mit{\Upsilon}(\mathrm{2}S)-to-\mit{\Upsilon}(\mathrm{1}S) and \mit{\Upsilon}(\mathrm{3}S)-to-\mit{\Upsilon}(\mathrm{1}S) cross-section ratios are found to decrease significantly as a function of event multiplicity, with the \mit{\Upsilon}(\mathrm{3}S)-to-\mit{\Upsilon}(\mathrm{1}S) ratio showing a steeper decline towards high multiplicity. This hierarchy is qualitatively consistent with the comover model predictions, indicating that final-state interactions play an important role in bottomonia production in high-multiplicity events.The \mit{\Upsilon}(\mathrm{2}S) and \mit{\Upsilon}(\mathrm{3}S) production cross-sections are measured relative to that of the \mit{\Upsilon}(\mathrm{1}S) meson, as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy of TeV. The measurement uses data collected by the LHCb experiment in 2018 corresponding to an integrated luminosity of 2 . Both the \mit{\Upsilon}(\mathrm{2}S)-to-\mit{\Upsilon}(\mathrm{1}S) and \mit{\Upsilon}(\mathrm{3}S)-to-\mit{\Upsilon}(\mathrm{1}S) cross-section ratios are found to decrease significantly as a function of event multiplicity, with the \mit{\Upsilon}(\mathrm{3}S)-to-\mit{\Upsilon}(\mathrm{1}S) ratio showing a steeper decline towards high multiplicity. This hierarchy is qualitatively consistent with the comover model predictions, indicating that final-state interactions play an important role in bottomonia production in high-multiplicity events
Exotic searches at ATLAS
No full textMany theories beyond the Standard Model (SM) have been proposed to address several of the SM shortcomings, such as explaining why the Higgs boson is so light, the origin of neutrino masses, or the observed pattern of masses and mixing angles in the quark and lepton sectors. Many of these beyond-the-SM extensions predict new particles or interactions directly accessible at the LHC. This talk will present some highlights on recent searches based on Run 2 data collected by the ATLAS detector at the LHC with a center-of-mass energy of 13 TeV
Pixel Detector Performance in Run 3 (December 2024)
No full textThe Large Hadron Collider (LHC) continued delivering proton-proton collisions in 2024 as part of the LHC Run 3 that started in 2022. The collisions are produced at the centre-of-mass energy of 13.6 TeV. This document provides the pixel detector performance in the entire 2024 by displaying bad components, cluster properties, hit efficiency, residuals, sensor bias voltage behavior, charge profiles and the Lorentz angle
Flavor mixing in charmonium and light mesons with optimal distillation profiles
No full textWe study the light meson - charmonium - glueball mixing using flavor-singlet meson operators built from optimal distillation profiles together with purely gluonic operators in different channels at two different pion masses ( , MeV) in two ensembles at close to physical charm quark mass. We observe non-zero mixing correlations between the different types of operators and quantify the overlaps between states created by them and the energy eigenstates by means of a GEVP formulation. We are particularly interested in the scalar glueball and its possible decay into two pions so we also include two-pion operators in our calculation.We study the light meson - charmonium - glueball mixing using flavor-singlet meson operators built from optimal distillation profiles together with purely gluonic operators in different channels at two different pion masses (, MeV) in two ensembles at close to physical charm quark mass. We observe non-zero mixing correlations between the different types of operators and quantify the overlaps between states created by them and the energy eigenstates by means of a GEVP formulation. We are particularly interested in the scalar glueball and its possible decay into two pions so we also include two-pion operators in our calculation
Angular analysis of decays
No full textAn angular analysis of decays is presented using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb. The analysis is performed in the region of the dilepton invariant mass squared of 1.1-6.0 GeV. In addition, a test of lepton flavour universality is performed by comparing the obtained angular observables with those measured in decays. In general, the angular observables are found to be consistent with the Standard Model expectations as well as with global analyses of other processes, where is either a muon or an electron. No sign of lepton-flavour-violating effects is observed.An angular analysis of decays is presented using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to an integrated luminosity of 9 fb. The analysis is performed in the region of the dilepton invariant mass squared of 1.1-6.0 GeV. In addition, a test of lepton flavour universality is performed by comparing the obtained angular observables with those measured in decays. In general, the angular observables are found to be consistent with the Standard Model expectations as well as with global analyses of other processes, where is either a muon or an electron. No sign of lepton-flavour-violating effects is observed