Run 1 and Run 2 of the Large Hadron Collider (LHC) at CERN produced huge volumes of data whose analysis will continue to deliver large numbers of physics results. To make this possible, the LHC experiments have been relying on services of the Worldwide LHC Computing Grid (WLCG).
At present, the LHC experiments are preparing for Run 3 of the LHC which will bring significantly higher...
Heavy-ion collisions covering a wide range of collision energies provide a vast amount of observables characterizing the properties of strongly-interacting matter. In particular collisions towards the high baryon-density regime of the QCD phase diagram have become of interest to study the phase transition between hadronic and partonic matter and to locate a possible critical end point. To...
- Study of initial state and causal dissipative fluid expansion in pp and pPb collisions at LHC energies with percolation color sources
Past experiments have revealed discrepancies in the consistency of the data from neutron form factor measurements, suffering from systematic uncertainty of the neutron detection. Measurements of the neutron's magnetic form factor $G^n_M$ suffer from insufficient detection efficiency whereas measurements of the neutron's electric form factor $G^n_E$ suffer from large backgrounds and low...
The idea of adding an Electromagnetic CALorimeter to the HADES spectrometer came from an interest in photon measurement and consequentially the detection of neutral mesons and resonances via their decay in photon pairs. Another advantage of having ECAL in the system is a significant improvement of electron-pion separation at high momenta. The detector is based on lead-glass modules with a PMT...
Cold-matter and hot-medium effects in p-Pb collisions at LHC energies - Hung
The recently developed renormalization group improved optimized perturbation theory (RGOPT) is applied to QCD at zero temperatures and finite densities. The pressure for cold and dense quark matter is calculated as a first application of this technique to QCD in the presence of a control parameter. At leading order a non-perturbative and completely scale invariant result is found. At next-to...
Investigations of few-nucleon systems provide suitable testing ground for different models of the nucleon-nucleon interaction. In three-nucleon systems, at intermediate energy, below the pion production threshold, the effects of three-nucleon forces (3NF) are generally small and hard for experimental study. To take a step forward into larger system, a four-nucleon (4N) were studied, where...
Despite decades of studies which have seen the nuclear charge distribution being measured with increasing precision, the neutron distribution remains elusive. The difference between the neutron and proton distributions is often expressed as the difference of their root mean square radii: the neutron skin thickness. Recently, the A2 collaboration at MaMi has measured the skin thickness in lead...
Scaling properties of Yang-Mills fields are used to show that fractal structures are expected to be present in system described by those field theories. We show that the fractal structure leads to recurrence formulas that allow the determination of non perturbative effective coupling. Fractal structures also cause the emergence of non extensivity in the system, which can be described by...
