Speaker
Antoni Szczurek
(Institute of Nuclear Physics, Krakow and Rzeszow University, Rzeszow)
Description
We discuss production of four-jet final state
$pp \to jjjjX$ in proton-proton collisions at the LHC
through the mechanism of double-parton scattering (DPS)
in the context of jets with large rapidity separation.
The DPS contributions are calculated within
the so-called factorized Ansatz and each step of DPS
is calculated in the LO collinear approximation.
The LO pQCD calculations are shown to give a reasonably
good descritption of recent CMS and ATLAS data
on inclusive jet production and therefore this formalism
can be used to reliably estimate the DPS effects.
Relative contribution of DPS is growing at large rapidity
distance between jets. This is consistent with our
experience from previous studies of double-parton scattering
effects in the case of open and hidden charm production.
The calculated differential cross sections as a function
of rapidity distance between the most remote in rapidity
jets are compared with recent results of LL and NLL BFKL
calculations for Mueller-Navelet (MN) jet production at
$\sqrt{s}$ = 7 TeV. The DPS contribution to
the production of jets widely separated in rapidity
is carefully studied for the present energy
%\sqrt{s}$ = 7 TeV and also at the nominal LHC energy
$\sqrt{s}$ = 14 TeV and in different ranges of jet transverse momenta.
The differential cross section as a function of dijet transverse
momenta as well as two-dimensional
$(p_T(y_{min}),p_T(y_{max})$ -plane correlations for DPS mechanism
are also presented. Some ideas how the DPS effects could be studied
in the case of double dijet production are suggested.
This research was published recently [1].
[1] R. Maciula and A. Szczurek,
Phys. Rev. D90, 014022 (2014).
Primary author
Antoni Szczurek
(Institute of Nuclear Physics, Krakow and Rzeszow University, Rzeszow)
