Nonidentical-particle femtoscopy at sq root(s{sub NN})=200 GeV in hydrodynamics with statistical hadronization

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.064906· OSTI ID:21388624

Kisiel, Adam ^[1]

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1. Department of Physics, Ohio State University, 1040 Physics Research Building, 191 West Woodruff Avenue, Columbus, Ohio 43210 (United States)

Nonidentical-particle femtoscopy probes not only the size of the emitting system, but also the emission asymmetries between particles of different masses, which are intimately related to the collective behavior of matter. We apply the technique to simulations from the therminator + lhyquid model of heavy-ion collisions at sq root(s{sub NN})=200 GeV. We present predictions for all pairwise combinations of pions, kaons, and protons and discuss their interpretation. We show that kaon and proton distributions are strongly influenced by flow: the source gets smaller and shifted to the outside with growing p{sub T}, while for pions the shift is significantly smaller, producing an emission asymmetry. We explain how particles coming from decays of hadronic resonances enhance the asymmetry signal coming from flow, contrary to naive expectations. Emphasis is put on extracting this unique information on the collective behavior of matter from nonidentical-particle correlations. We also present, in detail, the technical aspects of the nonidentical-particle femtoscopy technique applied to data from heavy-ion collisions. We list the sources of systematic errors coming from the method itself and the usual assumptions. We describe robust analysis methods and discuss their limitations.

• OSTI ID: 21388624
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevC.81.064906; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
CORRELATIONS
DISTRIBUTION
EMISSION
FORECASTING
GEV RANGE 100-1000
HEAVY ION REACTIONS
HYDRODYNAMICS
KAONS
MASS
PARTICLE DECAY
PIONS
PROTONS
RESONANCE
SIMULATION
BARYONS
BOSONS
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FLUID MECHANICS
GEV RANGE
HADRONS
MECHANICS
MESONS
NUCLEAR REACTIONS
NUCLEONS
PSEUDOSCALAR MESONS
STRANGE MESONS
STRANGE PARTICLES