We present our recent calculation of the dijet electroproduction cross section at the NLO accuracy within the Color Glass Condensate effective field theory. We focus on kinematical regime where the two jets are forward w.r.t. projectile's longitudinal direction and are almost back-to-back in transverse plain. We discuss the interplay between small-x and Sudakov resummation and show numerical...
We use Machine Learning with the event-generator (Sar$t$re) for
the for exclusive diffraction processes in electron-nucleus scattering. The second moment of the amplitude includes averaging of hundreds of initial nucleon configurations of the heavy nucleus, a procedure which is extremely CPU intense. We show that we can make the production of the cross-sections used for event generation at...
This analysis provides new fits of the GBW model and the impact parameter-dependent saturation model (bSat or IP-Sat) to the leading neutron structure function HERA data in one-pion exchange approximation. Both parametrizations of the dipole cross section provide good descriptions of the considered data. It is shown here for the first time that the experimental leading neutron production HERA...
It is known that the Real Extended Bialas-Bzdak (ReBB) model describes the proton-proton ($pp$) and proton-antiproton ($p\bar p$) differential cross section data in a statistically not excludible way, i.e., with a confidence level greater than 0.1% in the center of mass energy range 546 GeV $\leq\sqrt{s}\leq 8$ TeV and in the squared four-momentum transfer range 0.37 GeV$^2$ $\leq -t\leq1.2$...
A new measurement of inclusive jet cross sections in neutral current deep inelastic scattering using the ZEUS detector at the HERA collider is presented. The data were taken at HERA in the years 2004 to 2007 at a centre-of-mass energy of 318 GeV and correspond to an integrated luminosity of 347 pb-1. Massless jets, reconstructed using the kT-algorithm in the Breit reference frame, have been...
The azimuthal decorrelation angle ∆φ between the leading jet and scattered lepton in deep inelastic scattering has been measured with the ZEUS detector at HERA.The experimental data set was taken in the HERA II data-taking period and corresponds to an integrated luminosity of 326 pb-1. The measurement was performed within a range of the exchanged photon virtuality Q2 from 10 to 350 GeV2, the...
The talk will cover several research opportunities with tagged forward protons/neutrons using the proton-proton and proton-Oxygen collisions at the Large Hadron Collider.
I will review the impact of QCD corrections to quarkonium production in inclusive and exclusive reactions. First, I will explain how they significantly alter the cross section at mid and large $p_T$ in inclusive photo- and hadro-production. Second, I will discuss the perturbative instability arising at high energies in $p_T$-integrated fixed-order computations and discuss how they can be...
Lorentz and CPT symmetry in the quark sector of the Standard Model are studied in the context of an effective field theory using ZEUS e±p data. Symmetry-violating effects can lead to time-dependent oscillations of otherwise time-independent observables, including scattering cross sections. An analysis using five years of inclusive neutral-current deep inelastic scattering events corresponding...
The goal of LHCspin is to develop, in the next few years, innovative solutions and cutting-edge technologies to access spin physics in high-energy polarized fixed-target collisions, by exploring a unique kinematic regime given by the LHC beam and by exploiting new probes.
This ambitious task poses its basis on the recent installation of SMOG2, the unpolarized gas target in front of the LHCb...
The Polarized Hydrogen Gas Jet Target Polarimeter (HJET) at the Relativistic Heavy-Ion Collider (RHIC) is utilized to accurately measure the vertical polarization of proton beams with low systematic uncertainties of approximately $\sigma^\text{syst}_P/P\le0.5\%$. These measurements are conducted in the CNI region, $0.0013<|t|<0.017~\rm{GeV}^2$. By measuring the elastic single $A_\text{N}(t)$...
