Mr
Sebastian Klein
(DESY-Zeuthen)
27/09/2007, 14:30
QCD precision tests based on deeply inelastic scattering data require
the detailed knowledge of the heavy flavor contributions to the
structure functions. We report on recent calculations of the heavy flavor
Wilson coefficients to O(a_s^2), unpolarized and polarized,
in the region Q^2/m^2 => 10 and on first results relevant at
O(a_s^3).
Dr
Kouhei Hasegawa
(Desy Zeuthen, Theory group)
27/09/2007, 15:00
We calculate the light-by-light scattering type two-loop QCD corrections due to the light quark loops in the
para-charmonium decays $eta_{c} rightarrow gamma gamma$ and $eta_{c} rightarrow g g$. We replace
the mass of the internal charm quarks by an artificial large mass and obtain the result as a series in the
large mass. The obtained series can be transformed into the good convergent...
Dr
Mikhail Rogal
(DESY, Zeuthen)
27/09/2007, 15:30
In this presentation I would like to discuss technical and computational problems on
the derivation of the perturbative QCD corrections to three loops for the charged
current structure functions F_2, F_L and F_3 for deep-inelastic neutrino-proton
scattering in the combination "nu P - nubar P". In leading twist approximation we
calculate the first six odd-integer Mellin moments in the case...
