Dijet Azimuthal Decorrelations in pp Collisions at

Introduction

• Prerequisites for studies• Distributions & cuts• MC samples (compared with CMS data)• MC samples (without CMS data)

Prerequisites for studies

• At born level • Gluon emission causes deviations from• Experiments rely on Monte Carlo

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

Distributions & cuts

• Rapidity • Two jets with PT >30GeV• 4 regions :

MC samples (compared with CMS data)

• Herwig ++• Pythia 6• MadGraph

MC samples (compared with CMS data)

MC samples (compared with CMS data)

MC samples (compared with CMS data)

MC samples (without CMS data)

MC samples (without CMS data)

Conclusion

• The measured normalized distributions

are better described by the PYTHIA and HERWIG++ event generator

• MPI significantly influences distribution