Diffractive Dijet Production at 1.96 TeV
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Diffractive Dijet Production at 1.96 TeV
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The diffractive dijet events studied are characterized by the presence of two jets resulting
from a hard scattering and a leading antiproton, which escapes the collision intact.
Using Run II data and dedicated diffractive triggers, a measurement of the diffractive structure
function of the antiproton and a study of Double Pomeron Exchange (DPE) event candidates are presented.
The signature of a typical diffractive event in ppbar collisions is characterized by a
leading proton or anti-proton
and/or a region at large pseudorapidity with no particles, also known
as rapidity gap.
Hard diffraction processes are hadronic interactions that incorporate a high
transverse momentum partonic scattering, while carrying the characteristic
signature of a diffractive event.
Blessed Plots
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 (.eps),
(.gif)
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Xi distribution for the antiproton.
The leading antiproton is scattered with a small momentum transfer and loses a fraction Xi of its initial momentum. |
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(.eps),
(.gif)
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DeltaPhi between the two highest ET jets.
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(.eps),
(.gif)
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MiniPlug multiplicity (antiproton side).
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(.eps),
(.gif)
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Mean ET of the two highest ET jets.
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(.eps),
(.gif)
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Mean di-jet pseudo-rapidity.
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(.eps) (blue+cyan),
(.gif) (blue+cyan) (.eps) (blue+blue) ,
(.gif) (blue+blue) (.eps) (cyan+cyan) ,
(.gif) (cyan+cyan)
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Ratio of SD/ND events as a function of the Bjorken variable x_Bj.
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(.eps) ,
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Ratio of SD/ND events (same as above): q2 dependence.
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(.eps),
(.gif)
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Proton-side multiplicity: MP vs BSC.
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(.eps),
(.gif)
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DPE: Jet ET (leading and next-to-leading jets).
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(.eps),
(.gif)
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DPE: mean di-jet rapidity.
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(.eps),
(.gif)
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DPE: DeltaPhi (jet1-jet2).
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Useful Documentation
Last modified: Tue Apr 8 17:29:26 EDT 2003
