Scale factor in double parton collisions and parton densities in transverse space

@article{Fabbro2001ScaleFI,
  title={Scale factor in double parton collisions and parton densities in transverse space},
  author={Alessio Del Fabbro and D.Treleani},
  journal={Physical Review D},
  year={2001},
  volume={63},
  pages={057901}
}
The scale factor ${\ensuremath{\sigma}}_{\mathrm{eff}},$ which characterizes double parton collisions in high energy hadron interactions, is a direct manifestation of the distribution of the interacting partons in transverse space, in such a way that different distributions give rise to different values of ${\ensuremath{\sigma}}_{\mathrm{eff}}$ in different double parton collision processes. We work out the value of the scale factor in a few reactions of interest, in a correlated model of the… Expand

Figures and Tables from this paper

pQCD physics of multiparton interactions
We study production of two pairs of jets in hadron–hadron collisions in view of extracting contribution of double hard interactions of three and four partons (3→4, 4→4). Such interactions, in spiteExpand
Perturbative QCD correlations in multi-parton collisions
We examine the role played in double-parton interactions (DPI) by the parton–parton correlations originating from perturbative QCD parton splittings. Also presented are the results of the numericalExpand
Elements of a theory for multiparton interactions in QCD
A bstractWe perform a detailed investigation of multiple hard interactions in hadron-hadron collisions. We discuss the space-time, spin and color structure of multiple interactions, classifyExpand
Heavy-quark production in proton-nucleus collisions at the CERN LHC
A sizable rate of events, with several pairs of $b$-quarks produced contemporarily by multiple parton interactions, may be expected at very high energies as a consequence of the large partonExpand
Testing the scale dependence of the scale factor σeff in double dijet production at the LHC
The scale factor σeff is the effective cross section used to characterize the measured rate of inclusive double dijet production in high-energy hadron collisions. It is sensitive to the two-partonExpand
Double parton interactions in $$\gamma p, \gamma A$$γp,γA collisions in the direct photon kinematics
We derive expressions for the differential distributions and the total cross section of the double-parton interaction in direct photon interaction with proton and nuclei. We demonstrate that in thisExpand
HEAVY-QUARK PRODUCTION IN PROTON-NUCLEUS COLLISIONS AT THE LHC
One may expect a large rate of events, in hadron-nucleus collisions at the LHC, with several pairs of heavy-quarks produced contemporarily by multiple parton interactions. We estimate the inclusiveExpand
Double parton distribution of valence quarks in the pion in chiral quark models
The valence double parton distribution of the pion is analyzed in the framework of chiral quark models, where in the chiral limit factorization between the longitudinal and transverse degrees ofExpand
Double parton distributions in the pion in the Nambu–Jona-Lasinio model
Two-parton correlations in the pion, a non perturbative information encoded in double parton distribution functions, are investigated in the Nambu–Jona-Lasinio model. It is found that double partonExpand
Hard four-jet production in pA collisions
In a suitably chosen back-to-back kinematics, four-jet production in hadronic collisions is known to be dominated by contributions from two independent partonic scattering processes, thus givingExpand
...
1
2
3
4
...

References

SHOWING 1-10 OF 33 REFERENCES
Minijets and the two-body parton correlation
A large number of double parton scatterings have been recently observed by the CDF collaboration. The double parton scattering process measures {sigma}{sub eff}, a nonperturbative quantity related toExpand
Proton structure in transverse space and the effective cross section
The observation of double parton collisions by CDF has provided the first direct information on the structure of the proton in transverse space. The actual quantity which has been measured is theExpand
A multiple-interaction model for the event structure in hadron collisions.
TLDR
It is argued that hadronic events contain a varying number of semihard parton-parton interactions, with an average interaction rate given by perturbative QCD, and the variation between different events given by Poissonian statistics for each impact parameter separately. Expand
Double Drell-Yan annihilations in hadron collisions: Novel tests of the constituent picture
The production in hadron collisions of a pair of virtual photons, each having a large invariant mass, proceeds via two mechanisms: (a) two independent Drell-Yan-type annihilations of quark pairs in aExpand
Measurement of double parton scattering in pp collisons at s| = 1.8TeV
A strong signal for double parton scattering (DP) is observed in a 16 pb{sup {minus}1} sample of {bar p}p{r_arrow}{gamma}+3 jets+X data from the CDF experiment at the Fermilab Tevatron. TheExpand
Global QCD analysis of parton structure of the nucleon: CTEQ5 parton distributions
Abstract. An up-to-date global QCD analysis of high energy lepton-hadron and hadron-hadron interactions is performed to better determine the gluon and quark parton distributions in the nucleon.Expand
Multiparton processes: An application to the double Drell-Yan mechanism.
  • Mekhfi
  • Physics, Medicine
  • Physical review. D, Particles and fields
  • 1985
TLDR
The analysis shows that the existence of connecting gluons does not spoil factorizability in the leading-logarithm approximation of multiparton processes, and hadrons are described by a set of newly defined structure functions. Expand
Correlations in color and spin in multiparton processes.
  • Mekhfi
  • Physics, Medicine
  • Physical review. D, Particles and fields
  • 1985
TLDR
This work investigates the color and spin structure of multiparton processes, using a rigorous formalism for handling such new processes, and works out the cross section for these processes, which is a nontrivial generalization of the two-parton-initiated cross section. Expand
Calorimeter triggers for hard collisions
We discuss the use of a forward calorimeter to trigger on hard hadron-hadron collisions. We give a derivation in the covariant parton model of the Ochs-Stodolsky scaling law forExpand
Double parton scattering contribution toW+jets
We investigate the double parton scattering production ofW±+jets in proton colliders. At high energies an observable signal is expected from double parton collisions when events with small transverseExpand
...
1
2
3
4
...