Identity method for particle number fluctuations and correlations

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.84.024902· OSTI ID:21596683

Gorenstein, M I ^[1]

---

1. Bogolyubov Institute for Theoretical Physics, Kiev (Ukraine) and Frankfurt Institute for Advanced Studies, Frankfurt (Germany)

An incomplete particle identification distorts the observed event-by-event fluctuations of the hadron chemical composition in nucleus-nucleus collisions. A new experimental technique called the identity method was recently proposed. It eliminated the misidentification problem for one specific combination of the second moments in a system of two hadron species. In the present paper, this method is extended to calculate all the second moments in a system with an arbitrary number of hadron species. Special linear combinations of the second moments are introduced. These combinations are presented in terms of single-particle variables and can be found experimentally from the event-by-event averaging. The mathematical problem is then reduced to solving a system of linear equations. The effect of incomplete particle identification is fully eliminated from the final results.

• OSTI ID: 21596683
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 84, Issue 2; Other Information: DOI: 10.1103/PhysRevC.84.024902; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COLLISIONS
COMPUTERIZED SIMULATION
CORRELATIONS
FLUCTUATIONS
HADRONS
NUCLEI
NUCLEON-NUCLEON INTERACTIONS
PARTICLE IDENTIFICATION
BARYON-BARYON INTERACTIONS
ELEMENTARY PARTICLES
HADRON-HADRON INTERACTIONS
INTERACTIONS
PARTICLE INTERACTIONS
SIMULATION
VARIATIONS