Johannes Bluemlein
(DESY, Zeuthen)
28/03/2012, 08:30
Heavy flavours/structure functions
We report on recent results obtained for the massive Wilson coefficients which contribute to the structure function $F_2(x,Q2)$ at $O(\alpha_s2)$ and $O(\alpha_s3)$ in the region $Q2/m2 \gsim 10$ for general values of
the Mellin variable $N$ as well as to corresponding operator matrix elements emerging in FVNSs.
Fred Olness
(Southern Methodist University)
28/03/2012, 08:50
Heavy flavours/structure functions
We analyze the properties of the ACOT scheme for heavy quark
production and make use of the MS-bar massless results at NNLO and
N3LO for the structure functions F2 and FL in neutral current
deep-inelastic scattering to estimate the higher order corrections.
For this purpose we decouple the heavy quark mass entering the phase
space from the one entering the dynamics of the short distance...
Sven-Olaf Moch
(DESY, Zeuthen)
28/03/2012, 09:10
Heavy flavours/structure functions
We present exact results for the heavy-quark structure functions in deep-inelastic scattering (DIS) in different kinematical regimes and to next-to-next-to-leading order (NNLO) in perturbative QCD.
We combine the behavior near threshold, in the high-energy limit and at asymptotically large $Q2 \gg m2$ to derive approximate expressions at NNLO accuracy.
The remaining theoretical uncertainties...
Isabella Bierenbaum
(University Hamburg)
28/03/2012, 09:30
Heavy flavours/structure functions
I report on the calculation of the one-loop correction to the soft-gluon current with massive fermions. This current is process independent and controls the singular behavior of one-loop massive QCD amplitudes in the limit when one external gluon becomes soft. It therefore constitutes a necessary ingredient for the numerical evaluation of observables with massive fermions at hadron colliders...
Andrii Gizhko
(Kiev University + DESY)
28/03/2012, 10:30
Heavy flavours/structure functions
Charm production has been measured with the ZEUS detector
in deep inelastic ep scattering at HERA.
The measurement is based on the full reconstruction of the decay chain
D*->D0pis, D0->Kpi and exploits the full HERA II statistics.
Differential cross sections have been measured.
The kinematic range is 1.5 GeV < pT(D*) < 10GeV, |eta(D*)| < 1.5,
5 < Q2 < 1000GeV2 and 0.02 < y <...
Vladislav Libov
(DESY)
28/03/2012, 10:48
Heavy flavours/structure functions
Charm production in deep inelastic scattering has been measured with
the ZEUS detector using the full HERA II data set. The charm content in events with a jet has been extracted using the decay length significance and invariant mass of secondary vertices. Differential cross sections as a function of Q2, Bjoerken x, ET(jet) and eta(jet) were measured and compared to theoretical predictions....
Eva Hennekemper
(Uni Heidelberg)
28/03/2012, 11:06
Heavy flavours/structure functions
Inclusive production of D* mesons in deep-inelastic ep scattering at HERA is studied in the range 5 < Q^2 <100 GeV^2 of the photon virtuality and 0.02 < y < 0.7 of the inelasticity of the scattering process. The observed phase space for the D* meson is p_T(D*) > 1.25 GeV and |eta(D*)| < 1.8. The data sample corresponds to an integrated luminosity of 348 pb^{-1} collected with the H1 detector....
