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Di-hadron correlation in DIS based on e+p pythia data
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Outline
• Introduction
• ∆φand ∆y distribution of charged pions
• Leading particle rapidity, pt, θ .
• Pair production
• Conclusion
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Introduction• Di-jet processes in DIS are very interesting.Di-jet processes in DIS are very interesting.
• We choose one final hadron with the highest pt as the leading particle iWe choose one final hadron with the highest pt as the leading particle in one jet and make combinations with the other hadrons in the final stan one jet and make combinations with the other hadrons in the final state (mostly charged pion).te (mostly charged pion).
• The di-hadron production provides the most direct method of measurinThe di-hadron production provides the most direct method of measuring the underlying quark scattering mechanism.g the underlying quark scattering mechanism.
• Major pythia files which we focus on are e+p 10+250, 30+325 1MeventMajor pythia files which we focus on are e+p 10+250, 30+325 1Mevents without radiative correction. As a comparison, we also look into the es without radiative correction. As a comparison, we also look into the energy of 27+920.nergy of 27+920.
QCD Compton Boson Gluon Fusion
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∆φ and ∆y distribution
Leading particle(with highest pt in every event)
We are trying to look into the charged pions generated by the di-jet process. Pt, Q2 and acceptance cuts are also taken into consideration.
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Q2 vs x for pions with and without pt cuts
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Q2 vs x for 10+250
2GeV / c
1GeV / c
triggerT
trigger associateT T
p
p p
Assume the detector acceptance is 170°
>θ>10°
2GeV / c
1GeV / c
triggerT
trigger associateT T
p
p p
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Q2 vs x for 30+325
170°>θ>10°
2GeV / c
1GeV / c
triggerT
trigger associateT T
p
p p
2GeV / c
1GeV / c
triggerT
trigger associateT T
p
p p
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∆φ distribution
30+325 27+920
10+250
2 2Q 1GeV
2GeV / c
1GeV / c
triggerT
trigger associateT T
p
p p
2 2Q 1GeV
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LODIS PGF QCDC
2GeV / c
1GeV / c
triggerT
trigger associateT T
p
p p
2 2Q 1GeV170°>θ>10°(|η|<2.44)
10+250GeV
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2GeV / c
1GeV / c
triggerT
trigger associateT T
p
p p
2 2Q 1GeV
LODIS
170°>θ>10°(|η|<2.44)
10+250GeV
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∆y distribution
10+250
27+92030+325
2 2Q 1GeV2GeV / c
1GeV / c
triggerT
trigger associateT T
p
p p
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∆y vs ∆φ
30+325 27+920
10+250
2 /
1 /
triggerT
trigger associateT T
p GeV c
p p GeV c
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Leading particle with highest pt
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Pt of particle with highest
pt
30+325 27+920
10+250
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Rapidity of particle with highest pt
30+325
10+250
27+920
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Rapidity of trigger particle
with pt cut2GeV / ctrigger
Tp
30+325 27+920
10+250
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Rapidity vs pt of leading particle10+250
With acceptance cut for 170°>θ>10°
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Rapidity vs pt of leading particle30+325
With acceptance cut for 170°>θ>10°
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θ vs pt of the particle with h
ighest pt
30+325 27+920
10+250
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θ vs p of leading particle
30+325
10+250
27+920
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Pair production
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Kinematics
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Pair rapidity,pt,M2 distribution for
10+250
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Pair rapidity,pt,M2 distribution for
10+2502GeV / c
1GeV / c
triggerT
trigger associateT T
p
p p
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∆φ vs pt pair2GeV / c, 1GeV / ctrigger trigger associate
T T Tp p p
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Conclusion
• From the di-hadron correlation in DIS of e+p collision we can get some valuable information of the underlying dijet process
• Try to look into the di-hadron correlation in e+A collisions in the future
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Back up
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Rapidity correlation
2
1
triggerT
trigger associateT T
p GeV
p p GeV
2
1
triggerT
trigger associateT T
p GeV
p p GeV
2 2Q 1GeV
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Delta phi distribution at higher Q2
2 2Q 1GeV 2 2Q 5GeV
2 2Q 10GeV 2 2Q 15GeV