AZIMUTHAL DISTRIBUTION
OF
DIJETS
IN
DIFFRACTIVE DIS
David Šálek
December 8, 2005
Diffractive Meeting, Antwerpen
BOSON GLUON FUSION & TWO GLUON EXCHANGE MODEL
AZIMUTHAL ANGLE
definition of the azimuthal angle in gamma-p CMS
CUTS
Kinematical cuts: 8 8
Rspacal > 9.1
Jet cuts: pT > 3.5
-3 -1
zvertex & BASIC KINEMATICAL VARIABLES
SCATTERED ELECTRON
xgamma & E - pz
DIFFRACTIVE VARIABLES
FORWARD MUON DETECTORS
PROTON REMNANT TAGGER
way to improve agreement between data and MC:
FMD noise
good agreement needed only to calculate luminosity correctly
adding FMD noise decreases MC statistics
JET CHARACTERISTICS
LEADING JET
SECOND JET
HFS CALIBRATION ???
SUMMARY & OUTLOOK
retrieve W-shaped azimuthal distribution for BGF at parton level
reconstruct electron properties better in order to reveal generated
azimuthal distribution at reconstructed level
increase statistics by including events with final state radiation with
proper corrections to radiated gammas
generate Monte Carlo files with two gluon exchange
unfolding