We examine the contribution of Multiple Parton Interactions to Z + n-jets production at the LHC, n = 2, 3, 4, where the Z boson is assumed to decay leptonically. We compare the results obtained with the correlated GS09 double parton distribution function with those obtained with two instances of fully factorized single parton distribution functions: MSTW2008LO and CTEQ6L1. It appears quite feasible to measure the MPI contribution to Z +2/3/4 jets already in the first phase of the LHC with a total luminosity of one inverse femtobarn at 7 TeV. If as expected the trigger threshold for single photons is around 80 GeV, Z + 2-jets production may well turn out to be more easily observable than the γ + 3-jets channel. The MPI cross section is dominated by relatively soft events with two jets balancing in transverse momentum.

Multiple Parton Interactions in Z + jets production at the LHC. A comparison of factorized and non-factorized double parton distribution functions.

MAINA, Ezio
2011-01-01

Abstract

We examine the contribution of Multiple Parton Interactions to Z + n-jets production at the LHC, n = 2, 3, 4, where the Z boson is assumed to decay leptonically. We compare the results obtained with the correlated GS09 double parton distribution function with those obtained with two instances of fully factorized single parton distribution functions: MSTW2008LO and CTEQ6L1. It appears quite feasible to measure the MPI contribution to Z +2/3/4 jets already in the first phase of the LHC with a total luminosity of one inverse femtobarn at 7 TeV. If as expected the trigger threshold for single photons is around 80 GeV, Z + 2-jets production may well turn out to be more easily observable than the γ + 3-jets channel. The MPI cross section is dominated by relatively soft events with two jets balancing in transverse momentum.
2011
01
061
067
http://arxiv.org/abs/arXiv:1010.5674
Multiple Interactions; LHC; High Energy Physics
Ezio Maina
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/86799
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