925 research outputs found
Event Shape Analysis in ALICE
The jets are the final state manifestation of the hard parton scattering.
Since at LHC energies the production of hard processes in proton-proton
collisions will be copious and varied, it is important to develop methods to
identify them through the study of their final states. In the present work we
describe a method based on the use of some shape variables to discriminate
events according their topologies. A very attractive feature of this analysis
is the possibility of using the tracking information of the TPC+ITS in order to
identify specific events like jets. Through the correlation between the
quantities: thrust and recoil, calculated in minimum bias simulations of
proton-proton collisions at 10 TeV, we show the sensitivity of the method to
select specific topologies and high multiplicity. The presented results were
obtained both at level generator and after reconstruction. It remains that with
any kind of jet reconstruction algorithm one will confronted in general with
overlapping jets. The present method determines areas where one does encounter
special topologies of jets in an event. The aim is not to supplant the usual
jet reconstruction algorithms, but rather to allow an easy selection of events
allowing then the application of algorithms.Comment: 24 pages, ALICE Not
Effect of hard processes on momentum correlations
The effect of hard processes to be encountered in HBT studies at the Large
Hadron Collider have been studied. A simple simulation has allowed us to
generate momentum correlations involving jet particles as well as particles
originating from the kinetic freeze out and to compare them to a simple
theoretical model which has been developed. The first results on the effect of
hard processes on the correlation function for the case of jet quenching are
presented.Comment: 9 pages, 12 figures, talk presented at 2nd Warsaw Meeting on Particle
Correlations and Resonances in Heavy Ion Collision
Color reconnection and flow-like patterns in pp collisions
Increasingly, with the data collected at the LHC we are confronted with the
possible existence of flow in pp collisions. In this work we show that PYTHIA 8
produces flow-like effects in events with multiple hard subcollisions due to
color string formations between final partons from independent hard
scatterings, the so called color reconnection. We present studies of different
identified hadron observables in pp collisions at 7 TeV with the tune 4C.
Studies have been done both for minimum bias and multiplicity intervals in
events with and without color reconnection to isolate the flow-like effect.Comment: 4 pages, 4 figures. The first part of the manuscript was reorganized,
some typos were corrected and references added. The final version should
appear in PR
Thoughts on heavy-ion physics in the high luminosity era: the soft sector
This document summarizes thoughts on opportunities in the soft-QCD sector
from high-energy nuclear collisions at high luminosities.Comment: 19 page
Thoughts on opportunities from high-energy nuclear collisions
This document summarizes thoughts on opportunities from high-energy nuclear
collisions.Comment: 10 pages, pd
- …