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Subsections
Definition of the observable
We recall the invariant jet algorithm of ref. [2].
 One defines, for all finalstate (pseudo)particles still in
the event,

(29) 
and for each pair of final state particles

(30) 
 One determines the minimum over and of the and
the and calls it . If
then
particle is included in the beam and eliminated from the
final state particles. If
then
particles and are recombined into a pseudoparticle
(jet) in the Escheme:

(31) 
 The procedure is repeated until only 3 pseudoparticles are left
in the final state.
We apply the algorithm to all particles in the event and consider

(32) 
where is defined by further clustering the event until
only two jets
remain and taking as the sum of the two jet transverse
energies,

(33) 
The hard scale (Q) is taken to be the Born partonic centerofmass energy.
Rapidity of the center of mass of the outgoing pair: 0.000
Cosine of the angle between outgoing jet and beam (in the partonic CM frame): 0.200
Test 
result 
check number of jets 
T 
all legs positive 
T 
globalness 
T 
leg 





1 


1 

0 
2 


1 

0 
3 


1 

0 
4 


1 

0 
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
qq > qq 

qg > qg 

qg > gq 

gq > gq 

gq > qg 

qq > gg 

gg > qq 

gg > gg 

For a precise definition of the configurations see [3].
Number of events used: 256550
y3_DeltaRE_HH_dir.tar.gz
collects all files produced automatically by Caesar.
Next: Central y3 (kt algorithm,
Up: Observables in hadronic dijet
Previous: Cone wide broadening with
Giulia Zanderighi
20050527