Indications of conical emission of charged hadrons at the BNL relativistic heavy ion collider.

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Phys. Rev. Lett

DOI:https://doi.org/10.1103/PhysRevLett.102.052302· OSTI ID:963641

Abelev, B I; Aggarwal, M M; Ahammed, Z; Anderson, B D; Arkhipkin, D; Krueger, K; Spinka, H M; Underwood, D G

Three-particle azimuthal correlation measurements with a high transverse momentum trigger particle are reported for pp, d+Au, and Au+Au collisions at {radical}s{sub NN} = 200 GeV by the STAR experiment. Dijet structures are observed in pp, d+Au and peripheral Au+Au collisions. An additional structure is observed in central Au+Au data, signaling conical emission of correlated charged hadrons. The conical emission angle is found to be {theta} = 1.37 {+-} 0.02(stat){sub -0.07}{sup +0.06} (syst), independent of p.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Science Foundation (NSF)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 963641
• Report Number(s): ANL-HEP-PR-09-77; PRLTAO; TRN: US0903228
• Journal Information: Phys. Rev. Lett, Vol. 102, Issue 2009; ISSN 0031-9007
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
74 ATOMIC AND MOLECULAR PHYSICS
BNL
HADRONS
HEAVY IONS
TRANSVERSE MOMENTUM