Dijet Azimuthal Decorrelations in pp Collisions at
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Dijet Azimuthal Decorrelations in pp Collisions at
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Introduction
• Prerequisites for studies• Distributions & cuts• MC samples (compared with CMS data)• MC samples (without CMS data)
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Prerequisites for studies
• At born level • Gluon emission causes deviations from• Experiments rely on Monte Carlo
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Distributions & cuts
• Distribution:
• trigger systems L1 and HLT require pT>20 GeV and pT > 30 GeV respectively
• Jets reconstructed with unti-kT algorithm • required vertex distance d<24cm
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Distributions & cuts
• Rapidity • Two jets with PT >30GeV• 4 regions :
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MC samples (compared with CMS data)
• Herwig ++• Pythia 6• MadGraph
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MC samples (compared with CMS data)
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MC samples (compared with CMS data)
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MC samples (compared with CMS data)
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MC samples (without CMS data)
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MC samples (without CMS data)
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Conclusion
• The measured normalized distributions
are better described by the PYTHIA and HERWIG++ event generator
• MPI significantly influences distribution