Lambda Hyperons in 2 A*GeV Ni + Cu Collisions

Abstract

A sample of Lambda's produced in 2 A*GeV Ni + Cu collisions has been obtained with the EOS Time Projection Chamber at the Bevalac. Low background in the invariant mass distribution allows for the unambiguous demonstration of Lambda directed flow. The transverse mass spectrum at mid-rapidity has the characteristic shoulder-arm shape of particles undergoing radial transverse expansion. A linear dependence of Lambda multiplicity on impact parameter is observed, from which a total Lambda + Sigma^0 production cross section of $112 +/- 24 mb is deduced. Detailed comparisons with the ARC and RVUU models are made.

Revised version accepted for publication in Phys. Lett. B

References in corpus (3)

• Transverse momentum analysis of collective motion in relativistic nuclear collisions
• Lambda flow in heavy-ion collisions: the role of final-state interactions
• Separating True V0's from Combinatoric Background with a Neural Network

Cited by in corpus (9)

• Azimuthal anisotropy of K0s and Lambda prduction at mid-rapidity from Au+Au collisions at root s = 130 GeV
• Azimuthally sensitive correlations in nucleus-nucleus collisions
• Near-threshold production of the multi-strange ${\Xi }^{-}$ hyperon
• K^0 and Λproduction in Ni + Ni collisions near threshold
• Directed Flow of $\Lambda$-Hyperons in 2-6 AGeV Au+Au Collisions
• Lambda hyperon production and polarization in collisions of p(3.5 GeV) + Nb
• Anisotropic Collective Flow of Lambda Hyperons Produced in C + C Collisions at 4.2 AGeV/c
• Polarization of Lambda^0 hyperons in nucleus-nucleus collisions at high energies
• Systematics of yields of strange hadrons from heavy-ion collisions around threshold energies