Directed flow of Lambda hyperons in (2-6)A GeV Au+Au collisions

Citation
P. Chung et al., Directed flow of Lambda hyperons in (2-6)A GeV Au+Au collisions, PHYS REV L, 86(12), 2001, pp. 2533-2536
Citations number
33
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
12
Year of publication
2001
Pages
2533 - 2536
Database
ISI
SICI code
0031-9007(20010319)86:12<2533:DFOLHI>2.0.ZU;2-1
Abstract
Directed flow measurements for Lambda hyperons are presented and compared t o those for protons produced in the same Au + Au collisions (2A, 4A, and 6A GeV; b < 5 - 6 fm). The measurements indicate that Lambda hyperons flow co nsistently in the same direction but with smaller magnitudes. A strong posi tive flow [for ns] has been predicted in calculations which include the inf luence of the Lambda -nucleon potential. The experimental flow ratio hip is in qualitative agreement with expectations (similar to2/3) from the quark counting rule at 2A GeV but is found to decrease with increasing beam energ y.