Observation of Partial U{sub {ital A}}( 1) Restoration from Two-Pion Bose-Einstein Correlations

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.81.2205· OSTI ID:663112

Vance, S E; Csoergoe, T ^[1]; Csoergoe, T ^[2]; Kharzeev, D ^[3]

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1. Physics Department, Columbia University, New York, New York 10027 (United States)
2. MTA KFKI RMKI, H-1525 Budapest 144, P.O. Box 49 (Hungary)
3. RIKEN-BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973 (United States)

The effective intercept parameter of the two-pion Bose-Einstein correlation function, {lambda}{sub *} , is found to be sensitive to the partial restoration of U{sub A}(1) symmetry in ultra-relativistic nuclear collisions. An increase in the yield of the {eta}{sup {prime}} meson, proposed earlier as a signal of partial U{sub A}(1) restoration, is shown to create a {open_quotes}hole{close_quotes} in the low p{sub t} region of {lambda}{sub *} . A comparison with NA44 data and central S+Pb collisions at 200A GeV is made, and implications for future heavy ion experiments are discussed. {copyright} {ital 1998} {ital The American Physical Society}

• DOE Contract Number: FG02-93ER40764
• OSTI ID: 663112
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 81; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

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QUANTUM CHROMODYNAMICS
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