Probing the structure and dynamics of matter has witnessed a dramatic development overthe last decades with new theoretical advances to probe nucleons and nuclei beyond just a one-dimensional approach through Transverse-Momentum Distribution (TMD) functions. TMDsprovide crucial insight into the confined motion of quarks and gluons with a transverse momen-tumkTinside a nucleon and...
I will talk about phenomenology of Transverse Momentum Dependent distributions and the spin asymmetries observed in a variety of scattering processes.I will argue that those asymmetries have a common origin, namely they arise due to the quantum mechanical interference from multi-parton states of the hadron's wave function. I will explain how the theoretical and phenomenological understanding...
The elastic scattering of protons at 13 TeV is measured in the range of protons transverse momenta allowing the access to the Coulomb-Nuclear-Interference region. The data were collected thanks to dedicated special LHC beta* = 2.5km optics. The total cross section as well as rho-parameter, the ratio of the real to imaginary part of the forward elastic scattering amplitude, are measured and...
We present the preliminary results of unpolarized cross section and transverse single spin asymmetry (TSSA) of $Z^{0}$ measured by the STAR experiment. The cross section results combine 500/510 GeV $p$$+$$p$ data from 2011, 2012, 2013 and 2017, corresponding to a total luminosity of 700 pb$^{-1}$. The differential $Z^{0}$ cross section, measured as a function of the boson's transverse...
The recent PHENIX [1] and STAR [2] data on the nuclear dependence of the transverse single spin asymmetry calls for a careful investigation into potential theoretical mechanisms that would explain this data in a quantitative way. To that end we investigate the transverse single spin asymmetry in forward $p^\uparrow p$ and $p^\uparrow A$ collisions from the odderon mechanism suggested by...
I will present a review of measurements undertaken at various experiments
for determining the Generalized Parton Distributions in the nucleon. Results on Deeply Virtual Compton Scattering with exclusive single-photon
production as well as hard exclusive meson production have been obtained
at HERMES, JLab and COMPASS using electron or muon beams and nucleon
targets in various kinematic...
We study the exclusive photoproduction of a photon-meson pair with a large invariant mass, working at leading twist and leading order in the framework of QCD collinear factorisation. Explicitly,
the produced meson is either a rho meson or a charged pion. This process allows us to extract generalised parton distributions. In particular, unlike in deeply-virtual Compton scattering and...
New constraints on PDFs using recent CMS data will be shown in this talk
