arXiv subjects

K. Lipka

Publications and source records attributed to K. Lipka.

21 records · Page 2Linked to original sources

arXiv2012

Recent results from HERA and their impact for LHC

Recent measurements of inclusive and semi-inclusive deep inelastic scattering in electron-proton collisions at HERA are reviewed. These measurements are used to determine the parton distribution functions (PDFs) of the proton, a necessary input to theory predictions for hadron colliders. An introduction to the PDF determination with an emphasis on HERA PDFs is presented. Theory predictions based on HERAPDF are compared to a selection of recent LHC and Tevatron measurements. The impact of jet and charm production measurements on the PDFs is discussed.

hep-ex↗

arXiv2004

Charm production in ep interaction at HERA and evidence for a narrow anti-charmed baryon state at H1

Recent results on open charm production at HERA are presented. Charm quarks are identified via the reconstruction of D-mesons. The charm contribution to the proton structure function is shown. Evidence for an exotic anti-charmed baryon state observed by H1 is presented. The data show a narrow resonance in the D*p invariant mass combination at 3099+-3(stat)+-5(syst) MeV. The resonance is interpreted as an anti-charmed baryon with minimal constituent quark content uuddcbar together with its charge conjugate. Such a signal is not observed in a similar preliminary ZEUS analysis.

hep-ex↗

arXiv2002

DIS structure functions and the double-spin asymmetry in $ρ^0$ electroproduction within a Regge approach

The proton, neutron and deuteron structure functions $F_2(x,Q^2)$ and $g_1(x,Q^2)$, measured at intermediate $Q^2$, are analyzed within a Regge approach. This analysis serves to fix the parameters of this scheme which are then used to calculate, in a unified Regge approach, the properties of $ρ^0$ meson electroproduction on the proton and the deuteron. In this way, the double-spin asymmetry observed at HERMES in $ρ^0$ electroproduction on the proton, can be related to the anomalous behavior of the flavor-singlet part of the spin-dependent structure function $g_1(x,Q^2)$ at small $x$.

hep-ph↗