PHOBOS experiment at RHIC

Conference · Thu Nov 30 23:00:00 EST 1995

OSTI ID:219386

Wozniak, K ^[1]

---

1. Inst. of Nuclear Physics, Krakow (Poland)

The study of relativistic heavy nuclei collisions at RHIC opens a new area of physics--the physics of hadronic matter at very high energy densities. The conditions necessary to create a new state of matter, never before seen in the laboratory, may be reached. It gives a chance to study the quantum chromodynamics predictions of the phase transition from hadronic matter to a quark-gluon plasma. The PHOBOS experiment will investigate almost all predicted signals of the QGP formation. General event properties (angular distribution of charged particles, total multiplicity) will be combined with detailed information on particles emitted in the central rapidity region (particle ratios {pi}/K/p, p{sub t} spectra, correlations, {phi} meson properties). Similar studies will be done also in the other three experiments at RHIC, but there are many important observables for which PHOBOS will provide unique information. The multiplicity detector covers almost a full phase space, recording all charged particles with pseudorapidities {vert_bar}{eta}{vert_bar} {le} 5.4. In the PHOBOS spectrometer particles emitted in the central rapidity region will be measured and identified starting from lowest transverse momenta (20 MeV/c for pions). The high rate unbiased trigger gives a chance to see unpredicted phenomena and enables the study of very rare processes that require large statistics. The measurements of the converting photons planned for some runs will be used to study the {pi}{sup 0}/({pi}{sup +} + {pi}{sup {minus}}) ratio in selected phase space intervals.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Polish State Committee for Scientific Research (Poland)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 219386
• Report Number(s): ANL/PHY/CP--89441; CONF-9509307--1; ON: DE96008459
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
66 PHYSICS
BROOKHAVEN RHIC
HEAVY ION REACTIONS
HIGH ENERGY PHYSICS
KAONS
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PIONS
PROTONS
QUARK MATTER
RADIATION DETECTORS
RESEARCH PROGRAMS
TRANSVERSE MOMENTUM
TRIGGER CIRCUITS