Neutral Strange Particle Production In Ultra Relativistic Heavy Ion Collisions At Square Root Ofsuperior Snn
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Author |
: Matthew Allan Charles Lamont |
Publisher |
: |
Total Pages |
: 152 |
Release |
: 2002 |
ISBN-10 |
: OCLC:911154319 |
ISBN-13 |
: |
Rating |
: 4/5 (19 Downloads) |
Synopsis Neutral Strange Particle Production in Ultra - Relativistic Heavy Ion Collisions at [square Root Of][superior S]NN by : Matthew Allan Charles Lamont
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: |
Publisher |
: |
Total Pages |
: 15 |
Release |
: 2002 |
ISBN-10 |
: OCLC:68488968 |
ISBN-13 |
: |
Rating |
: 4/5 (68 Downloads) |
Synopsis Strangeness Production in Heavy Ion Collisions by :
A review of strange particle production in heavy ion collisions at ultrarelativistic energies is presented. The particle yields and ratios from SPS and RHIC are discussed in view of the newest developments in understanding collision dynamics, and in view of their role in the search for a quark gluon plasma. A strangeness enhancement, most notably observed in CERN Pb-beam results, shows a remarkable two fold global enhancement with a much larger effect seen in the case of multistrange baryons. Hadronic models did fail to explain this pattern. At RHIC energy strangeness assumes a different role, since temperatures are higher and the central rapidity region almost baryon-free. An intriguing question: ''Did RHIC change the way we understand strangeness production in heavy ion collisions?'' is discussed.
Author |
: Pål Nilsson |
Publisher |
: |
Total Pages |
: 76 |
Release |
: 2001 |
ISBN-10 |
: 9178741416 |
ISBN-13 |
: 9789178741410 |
Rating |
: 4/5 (16 Downloads) |
Synopsis Experimental Studies of Particle Production in Ultra-relativistic Heavy Ion Collisions by : Pål Nilsson
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Total Pages |
: |
Release |
: 1978 |
ISBN-10 |
: OCLC:1084405629 |
ISBN-13 |
: |
Rating |
: 4/5 (29 Downloads) |
Synopsis Particle Production in Relativistic Heavy Ion Collisions by :
Author |
: Hironori Ito |
Publisher |
: |
Total Pages |
: 318 |
Release |
: 2002 |
ISBN-10 |
: OCLC:51932069 |
ISBN-13 |
: |
Rating |
: 4/5 (69 Downloads) |
Synopsis Charged-particle Production in Au+Au Collisions at [square Root] S̳NN by : Hironori Ito
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Total Pages |
: 10 |
Release |
: 1994 |
ISBN-10 |
: OCLC:873507158 |
ISBN-13 |
: |
Rating |
: 4/5 (58 Downloads) |
Synopsis Particle-production Mechanism in Relativistic Heavy-ion Collisions by :
We discuss the production of particles in relativistic heavy-ion collisions through the mechanism of massive bremsstrahlung, in which massive mesons are emitted during rapid nucleon acceleration. This mechanism is described within the framework of classical hadrodynamics for extended nucleons, corresponding to nucleons of finite size interacting with massive meson fields. This new theory provides a natural covariant microscopic approach to relativistic heavy-ion collisions that includes automatically spacetime nonlocality and retardation, nonequilibrium phenomena, interactions among all nucleons, and particle production. Inclusion of the finite nucleon size cures the difficulties with preacceleration and runaway solutions that have plagued the classical theory of self-interacting point particles. For the soft reactions that dominate nucleon-nucleon collisions, a significant fraction of the incident center-of-mass energy is radiated through massive bremsstrahlung. In the present version of the theory, this radiated energy is in the form of neutral scalar ([sigma]) and neutral vector ([omega]) mesons, which subsequently decay primarily into pions with some photons also. Additional meson fields that are known to be important from nucleon-nucleon scattering experiments should be incorporated in the future, in which case the radiated energy would also contain isovector pseudoscalar ([pi], [pi]−, [pi]°), isovector scalar ([delta]+, [delta]−, [delta]°), isovector vector ([rho]+, [rho]−, [rho]°), and neutral pseudoscalar ([eta]) mesons.
Author |
: Feng Zhao |
Publisher |
: |
Total Pages |
: 206 |
Release |
: 2014 |
ISBN-10 |
: OCLC:907828912 |
ISBN-13 |
: |
Rating |
: 4/5 (12 Downloads) |
Synopsis Strangeness Production and Strange V0 & Charged Hadron Correlation in Heavy-ion Collisions by : Feng Zhao
In relativistic heavy-ion collisions, experimental evidence indicates that a new form of matter with de-confined quarks and gluons named the Quark-Gluon Plasma(QGP) has been created. The Relativistic Heavy Ion Collider (RHIC) provides a unique opportunity to study the QGP matter. Strange hadron production is believed to be sensitive to parton dynamics in heavy-ion collisions. In particular, the strange quark production rate and its subsequent evolution in the dense partonic medium depend on the beam energy and the net baryon density. The productions of K0s, [Lambda], [Xi], [Omega] at mid-rapidity from Au+Au collisions at the beam energies of 7.7, 11.5, 19.6, 27, and 39GeV from the RHIC Beam Energy Scan Program are measured. We investigate the strangeness enhancement and ratios of anti-baryon to baryon yields as a function of beam energy at RHIC. Nuclear modification factors and ratios of baryon to meson yields are also studied. Implications on collision dynamics due to the increase in the baryon chemical potential at low beam energy and constraints on chemical freeze-out parameters will also be discussed in this thesis. Parity-odd domains are theorized to form inside the QGP and to cause electric charge separation with respect to the reaction plane in the relativistic heavy-ion collisions via the Chiral Magnetic Effect (CME). Such charge separation has been studied at RHIC and LHC via the difference in two particle correlation between the opposite charge and same charge hadrons. The [Lambda](Lambda) and K0s particles are charge-neutral, and are supposed to bear no charge separation effects due to CME. We study the correlation between the neutral particle and charged hadron to investigate background for charged hadron correlation. In addition, the large angular momentum in heavy-ion collisions is predicted to lead to the Chiral Vortical Effect (CVE) which induces a baryon number separation, in analogy with the electric charge separation caused by CME. We carried out a study of [Lambda] - p correlations to search for the CVE. We present measurements of correlations for [Lambda] - h±, K0s - p, [Lambda] - p, in Au+Au collisions at 39GeV and 200GeV, to study the electric charge and baryon number separations across the reaction plane.
Author |
: Jian Gui Wang |
Publisher |
: |
Total Pages |
: 336 |
Release |
: 2000 |
ISBN-10 |
: OCLC:223330283 |
ISBN-13 |
: |
Rating |
: 4/5 (83 Downloads) |
Synopsis A Study of Multiparticle Production and Phase Transition in Ultra-relativistic Heavy-ion Collisions by : Jian Gui Wang
Author |
: J. Rau |
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: |
Total Pages |
: 17 |
Release |
: 1989 |
ISBN-10 |
: OCLC:256144806 |
ISBN-13 |
: |
Rating |
: 4/5 (06 Downloads) |
Synopsis Production of Supersymmetric Particles in Ultrarelativistic Heavy-ion Collisions by : J. Rau
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: |
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: |
Total Pages |
: 3 |
Release |
: 2002 |
ISBN-10 |
: OCLC:68222894 |
ISBN-13 |
: |
Rating |
: 4/5 (94 Downloads) |
Synopsis UNIVERSAL BEHAVIOR OF CHARGED PARTICLE PRODUCTION IN HEAVY ION COLLISIONS. by :
The PHOBOS experiment at RHIC has measured the multiplicity of primary charged particles as a function of centrality and pseudorapidity in Au+Au collisions at (square root)(s{sub NN}) = 19.6, 130 and 200 GeV. Two observations indicate universal behavior of charged particle production in heavy ion collisions. The first is that forward particle production, over a range of energies, follows a universal limiting curve with a non-trivial centrality dependence. The second arises from comparisons with pp/{bar p}p and ee− data. Nch/N{sub part}/2 in nuclear collisions at high energy scales with (square root)s in a similar way as N{sub ch} in ee− collisions and has a very weak centrality dependence. These features may be related to a reduction in the leading particle effect due to the multiple collisions suffered per participant in heavy ion collisions.