A. Etkin

Λ production by 11.6 A GeV/c Au beam on Au target

Abstract We present the first measurement at AGS energies of the rapidity and transverse mass distributions for Λ production with Au beam on Au target. The measurements cover the rapidity region of 2.0–3.2 and transverse momenta of 0.0–1.4 GeV/c. The results are compared with the predictions of two models.

Lambda production by 11.6-A/GeV/c Au beam on Au target

Abstract We present the first measurement at AGS energies of the rapidity and transverse mass distributions for Λ production with Au beam on Au target. The measurements cover the rapidity region of 2.0–3.2 and transverse momenta of 0.0–1.4 GeV/c. The results are compared with the predictions of two models.

Observation of three 2++ resonances in the glueball-enhanced channel π-p → φφn☆

Abstract We present data on 3652 analyzed events of the reaction π - p → φφn at 22 GeV/ c . A partial wave analysis has been performed on the φφ system. The results are well represented by three resonances all with quantum numbers I G J PC = 0 + 2 ++ . The absence of the Okubo-Zweig-Iizuka suppression observed in this reaction, the selection of only three J PC =2 ++ states ( g T , g T′ , and g T ″ ) which comprise virtually all of the cross section, and the large φφn signal over a very different φK + K - n background are all well explained if these states are produced by 1–3 glueballs (i.e. multigluon resonances).

The STAR detector magnet subsystem

We describe the specification and design, construction and mapping of the STAR magnet. Measurements demonstrate that field quality exceeds specifications for uniformity and agrees with design values.

The MPS II drift chamber system

Abstract A description is given of a drift chamber system that has very good resolution and beam rate capabilities in a compact and reasonably priced package.

Rapidity distributions of Ks0's and Λ's produced by 14.6×A GeV/cSi beams on Si and Pb targets

Abstract We present the first measurement at AGS energies of rapidity distributions of K s 0 and Λ production with silicon beams on silicon and lead targets. The measurements cover the rapidity region of 2.0 y K s 0 s and 1.4 y Λ s.

Neutral V production with 14.6 ×A GeV/c silicon beams

Abstract We present the results of a measurement of neutral V production with 14.6 × A GeV/ c Si beams on Au and Cu targets. The Λ and K s 0 yields were measured as a function of negative particle multiplicity. Effective temperatures were determined from an exponential fit to the transverse mass distributions.

H0 candidates from the decay H0 → Σ−p, observed in heavy ion collisions with 14.6 × A GeV/c Si beam on Pb target

Abstract We present H 0 candidate events, where the H 0 is observed through the decay H 0 → Σ − p . These decays are reconstructed in the three TPC modules of E810 while triggering on central Si Pb events at 14.6 × A GeV/c Si beam.

Rapidity distributions and nuclear transparency in heavy ion collisions

Abstract We have measured the rapidity distributions for charged particles produced in SiAu collisions at 14.6× A GeV/ c . No evidence is seen for enhanced production of protons at high rapidity as recently postulated based on fits to earlier data.

Transverse momentum distributions of π− from 14.6A GeV/c silicon ion interactions in copper and gold

Abstract A measurement of the transverse momentum spectrum of negatively charged tracks from AGS energy silicon ion collisions is presented. The spectrum has a different shape than that of nucleon-nucleon collisions at approximately the same energy. The transverse mass spectrum is well represented by a sum of two exponentials with different slopes and may be reasonably well accounted for by a model of pion production in interacting nuclear matter that includes resonance production and decay.