Markus Diehl
(DESY)
28/03/2012, 13:30
Diffraction and vector mesons/spin physics
The spatial distribution of partons in the proton or a nucleus can be
probed in suitable exclusive scattering processes. I review the
theoretical foundation and the physics interest of this idea, and I report on recent performance estimates for parton imaging in the proton at an Electron-Ion collider.
Hervé MOUTARDE
(I)
28/03/2012, 13:55
Diffraction and vector mesons/spin physics
We present some recent results on the analysis of hard scattering processes in the framework of Generalized Parton Distributions. In particular we compute DVCS observables on unpolarized targets with the Kroll - Goloskokov model (suited to DVMP analysis). We also discuss NLO contributions to DVCS and TCS processes for various kinematic settings (collider and fixed target experiments).
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research, Dubna, Russia)
28/03/2012, 14:15
Diffraction and vector mesons/spin physics
The structure of the nucleon charge-exchange process
n + p --> p + n is investigated basing on the isotopic
invariance of the nucleon-nucleon scattering. Using the operator
of permutation of the spin projections of the neutron and proton,
the connection between the spin matrices, describing the amplitude
of the nucleon charge-exchange process at zero angle and the
amplitude of...
Morgan Murray
(U)
28/03/2012, 14:35
Diffraction and vector mesons/spin physics
Deeply Virtual Compton Scattering represents the best experimental channel
through which to understand Generalised Parton Distributions. The HERMES
experiment measured the most diverse set of DVCS results of any experiment;
this talk discusses the most recent sets of DVCS results released by HERMES
and the unique experimental conditions found at HERMES that facilitated the
measurements....
Dr
Daria Sokhan
(in2p3)
28/03/2012, 14:55
Diffraction and vector mesons/spin physics
Generalised Parton Distributions (GPDs) offer an insight into the three-dimensional structure of the nucleon and its
internal dynamics, relating the transverse position of quarks to their longitudinal momentum. Two effective means of
accessing GPDs are Deeply Virtual Compton Scattering (DVCS) and Meson Production (DVMP), in which a high energy electron
scatters from a single quark in the...
Heiner Wollny
(CEA - Centre d'Etudes de Saclay (FR))
28/03/2012, 15:15
Diffraction and vector mesons/spin physics
New results for the transverse target spin azimuthal asymmetry
$A_{UT}^{\sin(\phi-\phi_S})$ for hard exclusive $\rho^0$-meson production on a transversely polarised NH$_3$ target will be presented. The measurement was performed in 2007 and 2010 with the COMPASS detector using the 160\,GeV/$c$ muon beam of the SPS at CERN. The asymmetry is sensitive to the nucleon helicity-flip generalised...
