# Double parton interactions as a background to associated HW production at the Tevatron

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## Abstract

In this paper we study events with *W* + jets final state, produced in double parton (DP) interactions, as a background to the associated Higgs boson (*H*) and *W* production, with \( H \to b\bar{b} \) decay, at the Tevatron. We have found that the event yield from the DP background can be quite sizable, which necessitates a choice of selection criteria to separate the *HW* and DP production processes. We suggest a set of variables sensitive to the kinematics of DP and *HW* events. We show that these variables, being used as an input to the artificial neural network, allow one to significantly improve a sensitivity to the Higgs boson production.

## Keywords

QCD Phenomenology## References

- [1]Axial Field Spectrometer collaboration, T. Akesson et al.,
*Double parton scattering in pp collisions at*\( \sqrt {s} = 63\;GeV \),*Z. Phys.***C 34**(1987) 163 [SPIRES].ADSGoogle Scholar - [2]UA2 collaboration, J. Alitti et al.,
*A Study of multi-jet events at the CERN*\( \bar{p}p \)*collider and a search for double parton scattering*,*Phys. Lett.***B 268**(1991) 145 [SPIRES].ADSGoogle Scholar - [3]CDF collaboration, F. Abe et al.,
*Study of four jet events and evidence for double parton interactions in*\( p\bar{p} \)*collisions at*\( \sqrt {s} = 1.8\;TeV \),*Phys. Rev.***D 47**(1993) 4857 [SPIRES].ADSGoogle Scholar - [4]CDF collaboration, F. Abe et al.,
*Double parton scattering in*\( \bar{p}p \)*collisions at*\( \sqrt {s} = 1.8\;TeV \),*Phys. Rev.***D 56**(1997) 3811 [SPIRES].ADSGoogle Scholar - [5]E735 collaboration, T. Alexopoulos et al.,
*The role of double parton collisions in soft hadron interactions*,*Phys. Lett.***B 435**(1998) 453 [SPIRES].ADSGoogle Scholar - [6]D0 collaboration, V.M. Abazov et al.,
*Multiple jet production at low transverse energies in*\( p\bar{p} \)*collisions at*\( \sqrt {s} = 1.8\;TeV \),*Phys. Rev.***D 67**(2003) 052001 [hep-ex/0207046] [SPIRES].ADSGoogle Scholar - [7]D0 collaboration, V.M. Abazov et al.,
*Double parton interactions in photon+3 jet events in*\( p\bar{p} \)*collisions*\( \sqrt {s} = 1.96\;TeV \),*Phys. Rev.***D 81**(2010) 052012 [arXiv:0912.5104] [SPIRES].ADSGoogle Scholar - [8]D0 collaboration, V.M. Abazov et al.,
*Azimuthal decorrelations and multiple parton interactions in photon+2 jet and photon+3 jet events in*\( p\bar{p} \)*collisions at*\( \sqrt {s} = 1.96\;TeV \), arXiv:1101.1509 [SPIRES]. - [9]ZEUS collaboration, C. Gwenlan,
*Multijets in photoproduction at HERA*,*Acta Phys. Polon.***B 33**(2002) 3123 [SPIRES].ADSGoogle Scholar - [10]H1 collaboration, F.D. Aaron,
*Study of multiple interactions in photoproduction at HERA*, H1-prelim-08-036 - [11]T. Sjöstrand and M. van Zijl,
*A Multiple Interaction Model for the Event Structure in Hadron Collisions*,*Phys. Rev.***D 36**(1987) 2019 [SPIRES].ADSGoogle Scholar - [12]A. Del Fabbro and D. Treleani,
*A double parton scattering background to Higgs boson production at the LHC*,*Phys. Rev.***D 61**(2000) 077502 [hep-ph/9911358] [SPIRES].ADSGoogle Scholar - [13]A. Del Fabbro and D. Treleani,
*Double parton scatterings in b-quark pairs production at the LHC*,*Phys. Rev.***D 66**(2002) 074012 [hep-ph/0207311] [SPIRES].ADSGoogle Scholar - [14]M.Y. Hussein,
*Double parton scattering in associate Higgs boson production with bottom quarks at hadron colliders*, arXiv:0710.0203 [SPIRES]. - [15]E.L. Berger, C.B. Jackson and G. Shaughnessy,
*Characteristics and Estimates of Double Parton Scattering at the Large Hadron Collider*,*Phys. Rev.***D 81**(2010) 014014 [arXiv:0911.5348] [SPIRES].ADSGoogle Scholar - [16]T. Sjöstrand, S. Mrenna and P.Z. Skands,
*PYTHIA 6.4 Physics and Manual*,*JHEP***05**(2006) 026 [hep-ph/0603175] [SPIRES].ADSCrossRefGoogle Scholar - [17]T. Sjöstrand and P.Z. Skands,
*Multiple interactions and the structure of beam remnants*,*JHEP***03**(2004) 053 [hep-ph/0402078] [SPIRES].ADSCrossRefGoogle Scholar - [18]D0 collaboration, V.M. Abazov et al.,
*Search for WH associated production in 5.3 fb*^{−1}*of*\( p\bar{p} \)*collisions at the Fermilab Tevatron*,*Phys. Lett.***B 698**(2011) 6 [arXiv:1012.0874] [SPIRES].ADSGoogle Scholar - [19]
- [20]M. Cacciari and G.P. Salam,
*Dispelling the N*^{3}*myth for the k*_{t}*jet-finder*,*Phys. Lett.***B 641**(2006) 57 [hep-ph/0512210] [SPIRES].ADSGoogle Scholar - [21]D0 collaboration, V.M. Abazov et al.,
*Measurement of the dijet invariant mass cross section in proton anti-proton collisions at*\( \sqrt {s} = 1.96\;TeV \),*Phys. Lett.***B 693**(2010) 531 [arXiv:1002.4594] [SPIRES].ADSGoogle Scholar - [22]D0 collaboration, V.M. Abazov et. al.,
*Measurement of the cross section for W and Z production to electron final state with the D0 detector at*\( \sqrt {s} = 1.96\;TeV \)*,*http://www-d0.fnal.gov/Run2Physics/WWW/results/prelim/EW/E06/E06.pdf. - [23]CDF II collaboration, D. Acosta et al.,
*First measurements of inclusive W and Z cross sections from run II of the Tevatron collider*,*Phys. Rev. Lett.***94**(2005) 091803 [hep-ex/0406078] [SPIRES].ADSCrossRefGoogle Scholar - [24]T. Hahn, S. Heinemeyer, F. Maltoni, G. Weiglein and S. Willenbrock,
*SM and MSSM Higgs boson production cross sections at the Tevatron and the LHC*, hep-ph/0607308 [SPIRES]. - [25]D0 collaboration, V.M. Abazov et al.,
*Measurement of the inclusive jet cross-section in*\( p\bar{p} \)*collisions at*\( \sqrt {s} = 1.96\;TeV \),*Phys. Rev. Lett.***101**(2008) 062001 [arXiv:0802.2400] [SPIRES].ADSCrossRefGoogle Scholar - [26]The D0 collaboration, V.M. Abazov et al.,
*b-Jet Identification in the D0 Experiment*,*Nucl. Instrum. Meth.***A 620**(2010) 490 [arXiv:1002.4224] [SPIRES].ADSGoogle Scholar - [27]CDF collaboration, T. Aaltonen et al.,
*Measurement of the cross section for W-boson production in association with jets in ppbar collisions at*\( \sqrt {s} = 1.96 - TeV \),*Phys. Rev.***D 77**(2008) 011108 [arXiv:0711.4044] [SPIRES].ADSGoogle Scholar - [28]P.V. Landshoff and J.C. Polkinghorne,
*Calorimeter triggers for hard collisions*,*Phys. Rev.***D 18**(1978) 3344 [SPIRES].ADSGoogle Scholar - [29]C. Goebel, F. Halzen and D.M. Scott,
*Double Drell-Yan annihilations in hadron collisions: novel tests of the constituent picture*,*Phys. Rev.***D 22**(1980) 2789 [SPIRES].ADSGoogle Scholar - [30]F. Takagi,
*Multiple production of quark jets off nuclei*,*Phys. Rev. Lett.***43**(1979) 1296 [SPIRES].ADSCrossRefGoogle Scholar - [31]N. Paver and D. Treleani,
*Multi-quark scattering and large p*_{T}*jet production in hadronic collisions*,*Nuovo Cim.***A 70**(1982) 215 [SPIRES].ADSCrossRefGoogle Scholar - [32]B. Humpert,
*Are there multi-quark interactions?*,*Phys. Lett.***B 131**(1983) 461 [SPIRES].ADSGoogle Scholar - [33]B. Humpert and R. Odorico,
*Multiparton scattering and QCD radiation as sources of four jet events*,*Phys. Lett.***B 154**(1985) 211 [SPIRES].ADSGoogle Scholar - [34]M.L. Mangano,
*Four Jet Production at the Tevatron Collider*,*Z. Phys.***C 42**(1989) 331 [SPIRES].Google Scholar - [35]D0 collaboration, S. Abachi et al.,
*Studies of topological distributions of inclusive the three and four jet events in*\( \bar{p}p \)*collisions at*\( \sqrt {s} = 1800\;GeV \)*with the D0 detector*,*Phys. Rev.***D 53**(1996) 6000 [hep-ex/9509005] [SPIRES].ADSGoogle Scholar - [36]C. Peterson, T. Rognvaldsson and L. Lönnblad,
*JETNET 3.0: A Versatile artificial neural network package*,*Comput. Phys. Commun.***81**(1994) 185 [SPIRES].ADSCrossRefGoogle Scholar

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