Author: Peter Dinkelaker
Publisher:
ISBN:
Category :
Languages : en
Pages : 152
Book Description
Kaon and Pion Production in Centrality Selected Minimum Bias Pb+Pb Collisions at 40 and 158A GeV
Author: Peter Dinkelaker
Publisher:
ISBN:
Category :
Languages : en
Pages : 152
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 152
Book Description
Baryon Stopping and Hadronic Spectra in Pb-Pb Collisions at 158 GeV
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Baryon stopping and particle production in Pb+Pb collisions at 158 GeV/nucleon are studied as a function of the collision centrality using new proton, antiproton, charged kaon and charged pion production data measured with the NA49 experiment at the CERN Super Proton Synchrotron (SPS). Stopping, which is measured by the shift in rapidity of net protons or baryons from the initial beam rapidity, increases in more central collisions. This is expected from a geometrical picture of the collisions. The stopping data are quantitatively compared to models incorporating various mechanisms for stopping. In general, microscopic transport calculations which incorporate current theoretical models of baryon stopping or use phenomenological extrapolations from simpler systems overestimate the dependence of stopping on centrality. Approximately, the yield of produced pions scales with the number of nucleons participating in the collision. A small increase in yield beyond this scaling, accompanied by a small suppression in the yield of the fastest pions, reflects the variation in stopping with centrality. Consistent with the observations from central collisions of light and heavy nuclei at the SPS, the transverse momentum distributions of all particles are observed to become harder with increasing centrality. This effect is most pronounced for the heaviest particles. This hardening is discussed in terms of multiple scattering of the incident nucleons of one colliding nucleus as they traverse the other nucleus and in terms of rescattering within the system of produced particles.
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Baryon stopping and particle production in Pb+Pb collisions at 158 GeV/nucleon are studied as a function of the collision centrality using new proton, antiproton, charged kaon and charged pion production data measured with the NA49 experiment at the CERN Super Proton Synchrotron (SPS). Stopping, which is measured by the shift in rapidity of net protons or baryons from the initial beam rapidity, increases in more central collisions. This is expected from a geometrical picture of the collisions. The stopping data are quantitatively compared to models incorporating various mechanisms for stopping. In general, microscopic transport calculations which incorporate current theoretical models of baryon stopping or use phenomenological extrapolations from simpler systems overestimate the dependence of stopping on centrality. Approximately, the yield of produced pions scales with the number of nucleons participating in the collision. A small increase in yield beyond this scaling, accompanied by a small suppression in the yield of the fastest pions, reflects the variation in stopping with centrality. Consistent with the observations from central collisions of light and heavy nuclei at the SPS, the transverse momentum distributions of all particles are observed to become harder with increasing centrality. This effect is most pronounced for the heaviest particles. This hardening is discussed in terms of multiple scattering of the incident nucleons of one colliding nucleus as they traverse the other nucleus and in terms of rescattering within the system of produced particles.
Pion Production Studies in Pb + Pb Collisions at 158 A GeV/c
Author: Renius Arsenescu
Publisher:
ISBN:
Category :
Languages : en
Pages : 97
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 97
Book Description
Baryon Stopping and Hadronic Spectra in Pb-Pb Collisons at 158 GeV/nucleon
Author: Glenn Elliot Cooper
Publisher:
ISBN:
Category :
Languages : en
Pages : 356
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 356
Book Description
Event-by-event Fluctuations of the Kaon to Pion Ratio in Central Pb+Pb Collisions at 158 GeV Per Nucleon
Author: S. Afanasʹev
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
PSEUDORAPIDITY distributions of charged particles as a function of centrality in Pb-Pb collisions at 158 and 40 GeV per nucleon incident energy
Author: C. AMSLER
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Lambda and Anti-Lambda Production in Central Pb-Pb Collisions at 40, 80, and 158 A GeV
Author: Tome Antičić
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Directed and Elliptic Flow of Charged Pions and Protons in Pb + Pb Collisions at 40 and 158 A GeV
Author: Christopher Alt
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Particle Production in 158.A GeV 208Pb+208Pb Collisions
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
Book Description
The production of neutral pions in 158A GeV 2°8Pb+2°8Pb collisions has been studied in the WA98 experiment. The centrality dependence of the neutral pion production is investigated. An invariance of the spectral shape and a simple scaling of the yield with the number of participating nucleons is observed for centralities with more than about 50 participants. The transverse mass spectrum is analyzed in terms of a thermal model with hydrodynamic expansion. The high accuracy and large kinematic coverage of the measurement constrains the extracted freeze-out parameters, and provides information on the freeze-out velocity profile.
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
Book Description
The production of neutral pions in 158A GeV 2°8Pb+2°8Pb collisions has been studied in the WA98 experiment. The centrality dependence of the neutral pion production is investigated. An invariance of the spectral shape and a simple scaling of the yield with the number of participating nucleons is observed for centralities with more than about 50 participants. The transverse mass spectrum is analyzed in terms of a thermal model with hydrodynamic expansion. The high accuracy and large kinematic coverage of the measurement constrains the extracted freeze-out parameters, and provides information on the freeze-out velocity profile.
? Production in Pb + Pb Collisions at 158 GeV/c
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 15
Book Description
Using the NA49 main TPC, the central production of (? + {bar?}) hyperons has been measured in CERN SPS Pb on Pb collisions at 158 GeV/c. The preliminary ({Xi} + {bar {Xi}})/ (? + {bar {Lambda}}) ratio, studied at 2.0
Publisher:
ISBN:
Category :
Languages : en
Pages : 15
Book Description
Using the NA49 main TPC, the central production of (? + {bar?}) hyperons has been measured in CERN SPS Pb on Pb collisions at 158 GeV/c. The preliminary ({Xi} + {bar {Xi}})/ (? + {bar {Lambda}}) ratio, studied at 2.0