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Meeting ID: 928 3880 1803
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In Aharonov-Bohm effect [1], the electrons have been found to be influenced by the classical potentials in field free region. This led to the notion that in quantum mechanics, potentials are fundamental objects, in spite of gauge freedom. In this talk, we will show that a quantum theory of electrostatic and magnetostatic fields can explain the observed effects: the quanta of the static fields...
Entanglement is a key subject in quantum information theory. Due to its genuine relativistic and fundamental nature, high-energy colliders are attractive systems for the experimental study of quantum information theory. We propose the detection of entanglement between the spins of top-antitop quark pairs at the LHC, representing the first proposal of entanglement detection in a pair of quarks,...
We consider a hierarchy of classical and quantum correlations for multiple agents restricted in their ability to signal to each other.
This work surveys the definitions of several non-locality classes (classical and quantum) and their relations. Existing results will be framed into a unified context and future of research will be outlined.
The indirect search of dark matter has been an important element in the scientific program of the IceCube since the beginning of the experiment. The IceCube Neutrino Observatory is a cubic kilometer neutrino telescope located at the South Pole which can detect the neutrino flux produced by the self-annihilation or decay of dark matter particles from regions where an over-density of dark matter...
Experimental observations and theoretical arguments at Galaxy and larger scales suggested that a large fraction of the Universe is composed by Dark Matter particles. This motivated the DAMA experimental efforts to investigate the presence of such particles in the galactic halo by exploiting a model independent signature and very highly radiopure set-ups deep underground. Here a review of the...
The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider
is a substantial upgrade of the B factory facility at the Japanese KEK laboratory.
The design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and
the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more
than its predecessor. During 2018, the machine has completed a...
The nature of dark matter (DM) is one of the most relevant open problems both in cosmology and particle physics. Many different experimental techniques have been developed to detect Weakly Interactive Massive Particles (WIMPs) as dark matter candidates via their scattering with detector atoms. The NEWSdm experiment, located in the Gran Sasso underground laboratory in Italy, is based on a novel...
A search for heavy resonances decaying into a pair of Z bosons is presented. The search uses proton–proton collision data at a centre-of mass energy of 13 TeV collected from 2015 to 2018 that corresponds to an integrated luminosity of 139 fb$^{-1}$ which is the full data statistics collected by the ATLAS detector during the Run 2 of the Large Hadron Collider (LHC). Different mass ranges for...
The unprecedentedly large integrated luminosity accumulated by the ATLAS detector at the highest proton-proton collision energy provided by the LHC allows for studies of rare top-quark SM processes. The associated production of top quarks with neutral bosons is such an example: it directly probes top-quark couplings to photons and Z bosons and tests for deviations from the standard...
Latest results on top quark pair and single top quark production cross sections (inclusive and differential) are presented using proton-proton collision data collected by CMS. The results are confronted with precise theory calculations and used to constrain Standard Model parameters. For the first time, the third row of CKM matrix is measured from single top quark events and multidifferential...
Searches for heavy neutral lepton production in K+ --> e+N and K+ --> mu+N decays using the data set collected by the NA62 experiment at CERN in 2016-18 are presented. Upper limits on the elements of the extended neutrino mixing matrix $|U_{e4}|^2$ and $|U_{\mu4}|^2$ are established at the levels of $10^{-9}$ and $10^{-8}$, respectively, improving on the earlier searches for heavy neutral...
The ENUBET experiment (*) aims at demonstrating the feasibility of a "monitored" neutrino beam, in which the absolute normalization of the neutrino flux produced by a narrow band meson beam can be constrained at the 1% level. The electron neutrino component is determined by monitoring large-angle positrons from K$_{e3}$ decays in a 40 m long instrumented decay tunnel (tagger). The measurement...
We present a study of the impact of the expansion of deconfined medium on single-gluon emission spectra and the jet suppression factor ($Q_{AA}$) within the BDMPS-Z formalism. These quantities are calculated for three types of media (static medium, exponentially decaying medium and Bjorken
expanding medium). The distribution of medium-induced gluons and the jet $Q_{AA}$ are calculated using...
In this talk we present our theoretical results for the multiplicity dependence of open heavy flavour mesons ($D$- and $B$-mesons) and prompt quarkonia production in $pp$ collisions. For the quarkonia production we found that rapidly growing multiplicity dependence could be interpreted as a strong evidence in favor of multigluon fusion contributions in production of the quarkonia states, and ...
Many theories beyond the Standard Model predict new phenomena, such as Z’ and vector-like quarks, in final states containing bottom or top quarks. Such final states offer great potential to reduce the Standard Model background, although with significant challenges in reconstructing and identifying the decay products and modelling the remaining background. The recent 13 TeV pp results, along...
Many beyond the Standard Model signatures predict new particles that decay into final state containing both leptons and jets. This talk will present new search results for massive particles by the ATLAS experiment using the full Run 2 dataset. A particular focus is given to searches for leptoquarks (LQ), that offer an attractive potential explanation for the lepton flavour anomalies seen at...
The main goal of the Muon g-2 Experiment at Fermilab is to measure the anomalous magnetic moment of the muon with a fourfold improvement in precision as compared to the previous measurement at BNL. The measurement is motivated by the greater than 3 standard deviation difference between the Standard Model prediction and the BNL measurement, which hints at the possibility of new physics. The...