545 research outputs found
Phenomenology of the Electron Structure Function
Advantages of introducing the electron structure function (ESF) in electron
induced processes are demonstrated. Contrary to the photon structure function
it is directly measured in such processes. At present energies a simultaneous
analysis of both the electron and the photon structure functions gives an
important test of the experimentally applied methods. Estimates of the ESF at
currently measured momenta are given. At very high momenta contributions from
and bosons together with - interference can be observed.
Predictions for next generation of experiments are given.Comment: 6 pages, 4 figures New version, new figures adde
Evidence for breakdown of the DGLAP description in diffractive DIS at HERA
HERA data on diffractive DIS show deviations from twist 2 DGLAP predictions
below GeV at low pomeron , which may reach up to 100%.
These deviations are consistent with higher twists effects extracted from the
saturation model. It is a first direct evidence for the higher twists in DIS.
This finding affects determination of the diffractive parton densities that are
used for the predictions at the LHC.Comment: 5 pages, 2 figures, Based on the talk presented at the conference
Deep-Inelastic Scattering and Related Subjects (DIS2012), Bonn, 201
General Mass Scheme for Jet Production in DIS
We propose a method for calculating DIS jet production cross sections in QCD
at NLO accuracy with consistent treatment of heavy quarks. The scheme relies on
the dipole subtraction method for jets, which we extend to all possible initial
state splittings with heavy partons, so that the Aivazis-Collins-Olness-Tung
massive collinear factorization scheme (ACOT) can be applied. As a first check
of the formalism we recover the ACOT result for the heavy quark structure
function using a dedicated Monte Carlo program.Comment: 6 pages, 2 figure
Evidence of strong higher twist effects in diffractive DIS at HERA at moderate Q2
We study a twist decomposition of diffractive structure functions in the
diffractive deep inelastic scattering (DDIS) at HERA. At low Q2 and at large
energy the data exhibit a strong excess, up to about 100%, above the twist 2
NLO DGLAP description. The excess in consistent with higher twist effects. It
is found, that complementing the DGLAP fit by twist 4 and 6 components of the
GBW saturation model leads to a good description of data at low Q2. We conclude
that the DDIS at HERA provides the first, strong evidence of higher twist
effects in DIS.Comment: 4 pages, 2 PDF figure
Advanced Transport Operating System (ATOPS) color displays software description microprocessor system
This document describes the software created for the Sperry Microprocessor Color Display System used for the Advanced Transport Operating Systems (ATOPS) project on the Transport Systems Research Vehicle (TSRV). The software delivery known as the 'baseline display system', is the one described in this document. Throughout this publication, module descriptions are presented in a standardized format which contains module purpose, calling sequence, detailed description, and global references. The global reference section includes procedures and common variables referenced by a particular module. The system described supports the Research Flight Deck (RFD) of the TSRV. The RFD contains eight cathode ray tubes (CRTs) which depict a Primary Flight Display, Navigation Display, System Warning Display, Takeoff Performance Monitoring System Display, and Engine Display
Advanced Transport Operating System (ATOPS) color displays software description: MicroVAX system
This document describes the software created for the Display MicroVAX computer used for the Advanced Transport Operating Systems (ATOPS) project on the Transport Systems Research Vehicle (TSRV). The software delivery of February 27, 1991, known as the 'baseline display system', is the one described in this document. Throughout this publication, module descriptions are presented in a standardized format which contains module purpose, calling sequence, detailed description, and global references. The global references section includes subroutines, functions, and common variables referenced by a particular module. The system described supports the Research Flight Deck (RFD) of the TSRV. The RFD contains eight Cathode Ray Tubes (CRTs) which depict a Primary Flight Display, Navigation Display, System Warning Display, Takeoff Performance Monitoring System Display, and Engine Display
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