In 2010 the proton charge radius was extracted for the first time from muonic hydrogen, a bound state of a muon and a proton. The value obtained was five standard deviations away from the regular hydrogen extraction. Taken at face value, this might be an indication of a new force in nature coupling to muons, but not to electrons. It also forces to reexamine our understanding of the structure...
The production of jets and prompt isolated photons at hadron colliders provides a stringent
test of perturbative QCD at the highest energies. These processes can
also be used to constrain the proton structure.
Recent measurements obtained using data collected by the ATLAS
detector at a center-of-mass energy of 8 TeV and 13 TeV will be
presented. These include the measurements of the inclusive...
We analyze the recent LHCb measurement of the distribution of the fraction of the transverse momentum, $z(J/\psi)$, carried by the $J/\psi$ within a jet. LHCb data is compared to analytic calculations using the fragmenting jet function
(FJF) formalism for studying $J/\psi$ in jets. Logarithms in the FJFs are resummed using DGLAP evolution. We also convolve hard QCD partonic cross sections,...
Measurements of the vector boson production in $pp$ collisions at $\textbf{LHC}$ form important part of physics programme of the $\textbf{ATLAS}$ Collaboration. More than 50 publications dealing with this topic have been published up to now. All aspects of W/Z physics studied at hadron colliders are covered. Predictions of Standard model are usually tested at least at NLO accuracy, NNLO...
Measurements of the cross sections of the production of two and three electroweak gauge bosons at the LHC constitute stringent tests of the electroweak sector of the Standard Model and provide a model-independent means to search for new physics at the TeV scale.
The ATLAS collaboration has performed new measurements of integrated and differential cross sections of the production of heavy...
We present the status of the nCTEQ15 global analysis of nuclear parton distribution functions (nPDFs). In this presentation we briefly discuss the framework of our analysis and concentrate on the comparison of our results with LHC data. Additionally we show a first estimate of the impact of the LHC pPb W/Z boson production data on the presented nCTEQ15 PDFs.
Precision physics at the HL-LHC will require novel techniques to distinguish hard QCD from pileup and beam jets (e.g. the identification of hadronic $W^+$ decay for electroweak measurements or boosted top tagging). One scheme is to identify the signature of QCD radiation inside of jets. The high particle-multiplicity of LHC multijets permits fine-grained investigation of the QCD radiation...
H -> J/Psi + gamma is a clean channel for measurement of the coupling between the Higgs boson and the charm quark. We present the result of our calculation of the decay rate of H -> J/Psi + gamma to relative order v^4 in NRQCD with lightcone resummation.
