Author: T. PeitzmannPublisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
Correlations of Neutral Pions in Ultrarelativistic Heavy Ion Collisions
Author: T. PeitzmannTwo-particle Correlations in Ultra Relativistic Heavy Ion Collisions
Author: Michael Scott DaugherityPublisher:
ISBN:
Category : Collisions (Nuclear physics)
Languages : en
Pages : 386
Book Description
Not Available.
Pi. ° Spectra and Correlations from 16O + Au Collisions at 200 A GeV.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The production of neutral pions by the interaction of 200 A GeV proton and 16O projectiles with an Au target has been studied for 1.5 d"[eta] d"2.1. Transverse momentum spectra have been measured between 0.4 GeV/c and 2.8 GeV/c and their dependence on the centrality of the reaction has been investigated. The peripheral spectrum shows a marked change of slope with a hard component starting at about 1.8 GeV/c in close similarity to p + p data. Preliminary analyses of photon data yield an excess over known photon sources for central data which is absent for peripheral reactions. Correlations of 4 photons representing neutral pions have been studied in ultrarelativistic heavy ion collisions. Data were taken in the WA80 experiment at the CERN-SPS with a 200 A GeV oxygen beam. The .pi.° are detected via their decay photons with a high-granularity lead glass array. Special features of interferometry using neutral pions will be discussed. The extracted preliminary parameters for high p/sub T/ pions emitted near midrapidity in O + Au collisions lead to rather small effective source sizes. 23 refs., 8 figs.
Pion Correlations in Relativistic Heavy Ion Collisions at HISS
Author: William Bennett ChristiePublisher:
ISBN:
Category : Heavy ion collisions
Languages : en
Pages : 314
Book Description
Azimuthal correlations of pions in relativistic heavy ion collisions at 1 GeV/nucl
Author: Particle Correlations in Ultra Relativistic Heavy Ion Collisions
Author: Sudhir BhardwajPublisher: LAP Lambert Academic Publishing
ISBN: 9783847304401
Category :
Languages : en
Pages : 136
Book Description
Quantum Chromodynamics calculations on the lattice predict that at extremely high energy densities, colliding nuclear matter would undergo a phase transition to deconfined matter of quarks and gluons. The nature of transition, the temperature and the energy density at which the transition occurs depend upon the details of calculations; these depend upon the number of quark flavors introduced in the calculation. This deconfined state of quark and gluons has been named Quark Gluon Plasma(QGP). This work purports to understand the azimuthal distribution of photons produced in Cu+Cu collisions at 200 GeV with Photon Multiplicity Detector (PMD). The PMD is part of the STAR (Solenoidal Tracker At RHIC) experiment.PMD covers a pseudorapidity range of -3.7 to -2.3 with full azimuthal coverage and measures the multiplicity and spatial distribution of photons on an event-by-event basis.The value of second order azimuthal coefficient has been determined for different centralities in different pseudorapidity windows and its pseudorapidity and centrality dependence has been obtained.
Three Pion Correlations in Relativistic Heavy Ion Collisions
Author: Yiming LiuPublisher:
ISBN:
Category : Heavy ion collisions
Languages : en
Pages : 342
Book Description
Azimuthal Correlations of Pions in Relativistic Heavy Ion Collisions at 1 GeV/nucl
Author: Two-pion Correlations in Heavy Ion Collisions
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
An application of intensity interferometry to relativistic heavy ion collisions is reported. Specifically, the correlation between two like-charged pions is used to study the reactions Ar+KCl.-->.2.pi./sup +-/+X and Ne+NaF.-->.2.pi.−+X. Source sizes are obtained that are consistent with a simple geometric interpretation. Lifetimes are less well determined but are indicative of a faster pion production process than predicted by Monte Carlo cascade calculations. There appears to be a substantial coherent component of the pion source, although measurement is complicated by the presence of final state interactions. Additionally, the generation of spectra of uncorrelated events is discussed. In particular, the influence of the correlation function on the background spectrum is analyzed, and a prescription for removal of this influence is given. A formulation to describe the statistical errors in the background is also presented. Finally, drawing from the available literature, a self-contained introduction to Bose-Einstein correlations and the Hanbury-Brown - Twiss effect is provided, with an emphasis on points of contact between classical and quantum mechanical descriptions.
Author: William Allen Zajc