Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing color reconnection with underlying event observables at the LHC
  energies   In this work we study the underlying event (UE) activity as a function of the
highest jet transverse momentum ($p_{\rm T}^{\rm jet}$) in terms of the number
and summed $p_{\rm T}$ densities of charged particles in the azimuthal region
transverse to the $p_{\rm T}^{\rm jet}$ direction. The UE observables
normalised to the INEL multiplicity obey an approximate Koba-Nielsen-Olesen
(KNO) scaling. Based on PYTHIA~8.2 simulations of $pp$ collisions at LHC
energies, we show that the remaining imperfection of the KNO scaling is due to
the increasing importance of multiple partonic interactions (MPI) at higher
$\sqrt{s}$. Motivated by this, we studied the UE activity considering charged
particles within different $p_{\rm T}$ intervals in $pp$ collisions at
$\sqrt{s}=7$\,TeV. We demonstrate that the saturations of both number and
summed $p_{\rm T}$ densities, which are commonly claimed, are only observed for
low-\pt charged particles ($0.5<p_{\rm T}<2$\,GeV/$c$). Moreover, for the
$p_{\rm T}$-integrated case ($p_{\rm T}>0.5$\,GeV/$c$) the summed $p_{\rm T}$
density is not sensitive to the variation of color reconnection (CR), however
at low-p_{\rm T} it is reduced with increasing CR, whereas an opposite
behaviour is found at intermediate-$p_{\rm T}$ ($2<p_{\rm T}<10$\,GeV/$c$).
Finally, we show that CR produces flow-like behaviour only in the UE region and
the effects are reduced with increasing $p_{\rm T}^{\rm jet}$ due to the
hardering of UE. The outcomes encourage the measurement of inclusive and
identified charged particle $p_{\rm T}$ spectra (over a wide range of $p_{\rm
T}$) associated to UE aimed at better understanding the similarities between
$pp$ and heavy-ion data discovered at the LHC.

37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci