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Subsections
Definition of the observable
In analogy with [7], one introduces a resolution
parameter and uses the following algorithm
 For each pair of finalstate hadrons and , one defines

(13) 
and for each combination of a particle and incoming parton one defines

(14) 
where is the photon virtuality.
 One finds the smallest value among the
. If
the smallest corresponds to two particles and , and
then these are to be recombined into a single
pseudoparticle in the recombination scheme
and 
(15) 
If the smallest corresponds to one of the particles with
the beams , and
, then particle is
included in the `beamjet' .
 This procedure is repeated until all remaining objects have
. These objects are called jets. To be
consistent with the original DIS definition, note that the beam
jets are not counted as jets.
The observable that is to be resummed is then the distribution of
, the largest value of such that the event is
clustered to two jets.
The hard scale (Q) is taken to be photon virtuality.
Test 
result 
check number of jets 
T 
all legs positive 
T 
globalness 
T 
Test 
result 
continuously global 
T 
exponentiation (condition 1) 
T 
exponentiation (condition 2a) 
T 
exponentiation (condition 2b) 
T 
exponentiation 
T 
additivity 
F 
eliminate subleading effects 
F 
opt. probe region exists 
F 
No zeroes or small values found.
Number of events used: 10000
Result for each colour configuration
For a precise definition of the configurations see [6].
Number of events used: 3910
y2_DurP_dis.tar.gz
collects all files produced automatically by Caesar.
Next: y3 resolution (Durham algorithm,
Up: Observables in DIS
Previous: Outofplane momentum
Giulia Zanderighi
20041119