1,872 research outputs found
A study of Double Pomeron Exchange in ALICE
The non-Abelian nature of QCD suggests that particles that have a gluon
constituent, such as glueballs or hybrids, should exist. Experiments WA76, WA91
and WA102 have performed a dedicated search for these states in central
production using the CERN Omega Spectrometer. New results from central
production show that there is a kinematical filter which can select out
glueball candidates from known qqbar states. A further study of this at high
energies is essential in order to get information on the M(X0) > 2 GeV region.
This paper describes how this could be done using the the ALICE detector at the
LHC.Comment: 17 pages, Latex, 7 Figure
A Prototype Fast Multiplicity Discriminator for ALICE L0 Trigger
The design details and test results of a prototype Multiplicity Discriminator (MD) for the ALICE L0 Trigger electronics are presented. The MD design is aimed at the earliest trigger decision founded on a fast multiplicity signal cut, in both options for the ALICE centrality detector: Micro Channel Plates or Cherenkov counters. The MD accepts detector signals with an amplitude range of plus-minus 2.5 V, base duration of 1.8 ns and rise time of 300-400 ps. The digitally controlled threshold settings give an accuracy better than 0.4% at the maximum amplitude of the accepted pulses. The MD internal latency of 15 ns allows for a decision every LHC bunch crossing period, even for the 40 MHz of p-p collisions
Centrality dependence of the pseudorapidity density distribution for charged particles in PbāPb collisions at āsNN=5.02 TeV
Measurement of D-meson production at mid-rapidity in pp collisions at ās=7 TeV
The production cross sections for prompt charmed mesons D0, D+, Dā+ and D+s were measured at mid-rapidity in protonāproton collisions at a centre-of-mass energy ās=7 TeV with the ALICE detector at the Large Hadron Collider (LHC). D mesons were reconstructed from their decays D0āKāĻ+, D+āKāĻ+Ļ+, Dā+āD0Ļ+, D+sāĻĻ+āKāK+Ļ+, and their charge conjugates.With respect to previous measurements in the same rapidity region, the coverage in transverse momentum (pT) is extended and the uncertainties are reduced by a factor of about two. The accuracy on the estimated total ccbar production cross section is likewise improved. The measured pT-differential cross sections are compared with the results of three perturbative QCD calculations.<br/
Ī£(1385)<sup>Ā±</sup> resonance production in PbāPb collisions at ās<sub>NN</sub> = 5.02 TeV
Recent developments on the ALICE central Trigger processor
The ALI CE Central Trigger Processor has been constructed and tested, and will shortly be installed in the experimental area. In this review, we introduce the new developments in hardware and software, present a measurement of the minimum propagation time, and illustrate various trigger applications
Exploration of jet substructure using iterative declustering in pp and PbāPb collisions at LHC energies
- ā¦