Recent studies within the framework of chiral unitary theory produce the Λ(1520) resonance, among several others, as a dynamically generated resonance from the interaction of the baryon decuplet and the meson octet. The Λ(1520) qualifies as a quasibound state of πΣ(1385) and this has repercussion in some observable quantities. In the present work we show that the γp → K+K−p reaction has a sizea...

Coherent Λπ− production on Pb of 600GeV Σ− hyperons has been studied with the SELEX facility at Fermilab. Using the Primakoff formalism, we set a 90% CL upper limit on the radiative decay width Γ[Σ(1385)− → Σ−γ] < 9.5 keV, and estimate the cross section for γΣ− → Λπ− at √s ≈ 1.385GeV to be 56± 16μb.

Schaller on Archer ............................. 1379 Coruell on Archer .............................. 1380 Eagly on Archer ................................. 1380 Archer Replies ................................... 1383 Hojat on the U.N. Convention on the Rights of the Child ................ 1384 Wessells on the U.N. Convention on the Rights of the Child ............... 1385 Juni on Students' Ri...

Coherent Λπ− production on Pb of 600GeV Σ− hyperons has been studied with the SELEX facility at Fermilab. Using the Primakoff formalism, we set a 90% CL upper limit on the radiative decay width Γ[Σ(1385)− → Σ−γ] < 9.5 keV, and estimate the cross section for γΣ− → Λπ− at √s ≈ 1.385GeV to be 56± 16μb.

Yields and spectra of Σ(1385) are measured in p+p, d+Au and Au+Au collisions at √ s NN =200 GeV. The nuclear modification factors in d + Au collisions are presented. The pT dependent medium effects are investigated via the nuclear modification factors. The implications of these results on various models are discussed.