Searcharxiv⌕ Search

arXiv subjects

Guenter Grindhammer

Publications and source records attributed to Guenter Grindhammer.

6 recordsLinked to original sources
arXiv2011

Determination of PDFs and $α_{S}(M_{Z})$ from Inclusive and Jet Measurements in DIS @ HERA

A simultaneous NLO QCD fit of the parton density functions (PDFs) of the proton and of the strong coupling $α_{S}(M_{Z})$ is presented. The analysis is based on combined H1 and ZEUS inclusive DIS cross section measurements together with inclusive jet cross section measurements provided by both H1 and ZEUS collaborations. The inclusion of the jet data significantly reduces the correlation between the gluon PDF and the strong coupling, improving the precision of the gluon PDF and providing an accurate determination of $α_{S}(M_{Z})$ using DIS data from HERA only.

hep-ex↗
arXiv2008

What HERA may provide ?

More than 100 people participated in a discussion session at the DIS08 workshop on the topic What HERA may provide. A summary of the discussion with a structured outlook and list of desirable measurements and theory calculations is given.

hep-ph↗
arXiv2008

Hadronic Final States and QCD: Summary

A summary of new experimental results and recent theoretical developments discussed in the "Hadronic Final States and QCD" working group is presented.

hep-ph↗
arXiv2002

Electroproduction of Dijets at Small Jet Separation

Dijet production in deep-inelastic scattering (DIS) in the range 150 < Q^2 < 35000 GeV^2 has been measured by the H1 collaboration using the Durham jet algorithm in the laboratory frame. QCD calculations in next-to-leading order (NLO) are found to give a good description of the data when requiring a small minimum jet separation, which selects a dijet sample containing 1/3 of DIS events in contrast to approximately 1/10 with more typical jet analyses.

hep-ex↗
arXiv1998

Photon Structure

Large pT processes at HERA, initiated by almost real and by virtual photons, provide information on the structure of the photon. We report on the latest measurements of dijets and large pT particle production with the H1 detector. This includes a leading order determination of an effective virtual photon parton density, of the gluon density of the photon, and comparisons with models.

hep-ex↗