Author: Małgorzata Anna JanikPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Two-particle Correlations as a Function of Relative Azimuthal Angle and Pseudorapidity in Proton-proton Collisions Registered by the ALICE Experiment
Author: Małgorzata Anna JanikPseudorapidity Dependence of Long-range Two-particle Correlations in $p$Pb Collisions at $\sqrt{s_{NN}}
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Two-particle correlations in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV are studied as a function of the pseudorapidity separation (Delta eta) of the particle pair at small relative azimuthal angle (abs(Delta phi)
Two-particle Correlations in Azimuthal Angle and Pseudorapidity in Central 7Be+9Be Collisions at the CERN Super Proton Synchrotron
Author: Antoni AduszkiewiczTwo-particle Correlations in Azimuthal Angle and Pseudorapidity in Inelastic P + P Interactions at the CERN Super Proton Synchrotron
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 15
Book Description
Results on two-particle [Delta][eta][Delta][Phi] correlations in inelastic p + p interactions at 20, 31, 40, 80, and 158 GeV/c are presented. The measurements were performed using the large acceptance NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The data show structures which can be attributed mainly to effects of resonance decays, momentum conservation, and quantum statistics. Furthermore, the results are compared with the Epos and UrQMD models.
Centrality Dependence of Dihadron Correlations and Azimuthal Anisotropy Harmonics in PbPb Collisions at $\sqrt{s_{NN}}
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measurements from the CMS experiment at the LHC of dihadron correlations for charged particles produced in PbPb collisions at a nucleon-nucleon centre-of-mass energy of 2.76 TeV are presented. The results are reported as a function of the particle transverse momenta (pt) and collision centrality over a broad range in relative pseudorapidity [Delta(eta)] and the full range of relative azimuthal angle [Delta(phi)]. The observed two-dimensional correlation structure in Delta(eta) and Delta(phi) is characterised by a narrow peak at (Delta(eta), Delta(phi)) approximately (0, 0) from jet-like correlations and a long-range structure that persists up to at least.
Looking Inside Jets
Author: Simone MarzaniPublisher: Springer
ISBN: 3030157091
Category : Science
Languages : en
Pages : 205
Book Description
This concise primer reviews the latest developments in the field of jets. Jets are collinear sprays of hadrons produced in very high-energy collisions, e.g. at the LHC or at a future hadron collider. They are essential to and ubiquitous in experimental analyses, making their study crucial. At present LHC energies and beyond, massive particles around the electroweak scale are frequently produced with transverse momenta that are much larger than their mass, i.e., boosted. The decay products of such boosted massive objects tend to occupy only a relatively small and confined area of the detector and are observed as a single jet. Jets hence arise from many different sources and it is important to be able to distinguish the rare events with boosted resonances from the large backgrounds originating from Quantum Chromodynamics (QCD). This requires familiarity with the internal properties of jets, such as their different radiation patterns, a field broadly known as jet substructure. This set of notes begins by providing a phenomenological motivation, explaining why the study of jets and their substructure is of particular importance for the current and future program of the LHC, followed by a brief but insightful introduction to QCD and to hadron-collider phenomenology. The next section introduces jets as complex objects constructed from a sequential recombination algorithm. In this context some experimental aspects are also reviewed. Since jet substructure calculations are multi-scale problems that call for all-order treatments (resummations), the bases of such calculations are discussed for simple jet quantities. With these QCD and jet physics ingredients in hand, readers can then dig into jet substructure itself. Accordingly, these notes first highlight the main concepts behind substructure techniques and introduce a list of the main jet substructure tools that have been used over the past decade. Analytic calculations are then provided for several families of tools, the goal being to identify their key characteristics. In closing, the book provides an overview of LHC searches and measurements where jet substructure techniques are used, reviews the main take-home messages, and outlines future perspectives.
Possible Multiparticle Ridge-like Correlations in Very High Multiplicity Proton-proton Collisions
Author: Two-particle Correlations at Small Relative Momenta, Measured for the Reactions N+Au at E/A
Author: Ziping ChenPublisher:
ISBN:
Category : Nuclear reactions
Languages : en
Pages : 400
Book Description
Long-range Azimuthal Correlations in Proton-proton and Proton-nucleus Collisions from the Incoherent Scattering of Partons
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
In this study, we show that the incoherent elastic scattering of partons, as present in a multi-phase transport model (AMPT), with a modest parton-parton cross-section of [sigma] = 1.5 - 3 mb, naturally explains the long-range two-particle azimuthal correlation as observed in proton-proton and proton-nucleus collisions at the Large Hadron Collider.
Long-Range Near-Side Angular Correlations in Proton-Proton Interactions in CMS.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The CMS Collaboration Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center of mass energies of 0.9, 2.36 and 7TeV over a broad range of pseudorapidity and azimuthal angle (f) are presented using data collected with the CMS detector at the LHC. Short-range correlations in??, which are studied in minimum bias events, are characterized using a simple independent cluster parameterization in order to quantify their strength (cluster size) and their extent in? (cluster decay width). Long-range azimuthal correlations are studied more differentially as a function of charged particle multiplicity and particle transverse momentum using a 980nb-1 data set at 7TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particles in intermediate pT's of 1-3GeV/c, 2.0>