667 research outputs found
Investigation of High Energy Behaviour of HERA Data
We analyse the high precision HERA data in the low- regions,
and the very-low-, , regions using -Fits.
is a measure of the rate of rise of defined by . We show that determined in these two regions, at
various values, is systematically smaller in the very-low- region as
compared to the low- region. We discuss some possible physical
interpretations of this effect.Comment: 19 pages, 10 figure
Diffractive production of charm quark/antiquark pairs at RHIC and LHC
We have discussed single and central diffractive production of
pairs in the Ingelman-Schlein model. In these calculations we have included
diffractive parton distributions obtained by the H1 collaboration at HERA and
absorption effects neglected in some early calculations in the literature. The
absorption effects which are responsible for the naive Regge factorization
breaking cause that the cross section for diffractive processes is much smaller
than that for the fully inclusive case, but could be measured at RHIC and LHC
by imposing special condition on rapidity gaps. We discuss also different
approaches to diffractive production of heavy quark/antiquark. The particular
mechanism is similar to the diffractive dissociation of virtual photons into
quarks, which drives diffractive deep inelastic production of charm in the
low-mass diffraction, or large -region.Comment: 4 pages, 5 figures, talk given by M. Luszczak at International
Workshop on Diffraction in High-Energy Physics, DIFFRACTION 2012, Puerto del
Carmen, Lanzarote. (Canary Islands), Spain. September 10 - 15, 201
Dipole model analysis of highest precision HERA data, including very low 's
We analyse, within a dipole model, the final, inclusive HERA DIS cross
section data in the low region, using fully correlated errors. We show,
that these highest precision data are very well described within the dipole
model framework starting from values of 3.5 GeV to the highest values
of 250 GeV.Comment: 16 pages, 4 figures. arXiv admin note: text overlap with
arXiv:1312.406
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