Measurements of the global transverse energy distributions dσ/dET and dET/dη using the new AGS beam of 197Au at 11.6A GeV/c on a Au target, as well as a beam of 28Si at 14.6A GeV/c on Al and Au targets, are presented for a leadglass detector with acceptance 1.3 ≤ η ≤ 2.4 and 0 ≤ φ < 2π. The dσ/dET spectra are observed to have different shapes for the different systems and simple energy rescaling does not account for the projectile dependence. The Au+Au dσ/dET spectrum is satisfactorily constructed from the upper edge of Si+Au by the geometric Wounded Projectile Nucleon Model after applying a correction for the beam energy.
Bibliographical noteFunding Information:
We gratefullayc knowledgteh e effortso f the BNL AGS, Booster and Tandem operationss taffs and the AGS riggers.W e thank C. Ogilvie for his critical readingo f the manuscriptT. his work has been supportedb y the U.S. Departmenot f Energy under contractsw ith ANL (W-31-109-ENG-38)B,N L (DE-AC02-76CH00016C),o lumbiaU niversity( DE-FG02-86-ER40281)M, IT (DE-AC02-76ER03069), UCR (DE-FG03-86ER40271b),y NASA under con-tractw ith the Universityo f California( NGR-05-003-513), and by the U.S.-Japan High Energy Physics CollaboratioTnr eaty.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics