A straw drift chamber spectrometer for studies of rare kaon decays

We describe the design, construction, readout, tests, and performance of planar drift chambers, based on 5 mm diameter copperized Mylar and Kapton straws, used in an experimental search for rare kaon decays. The experiment took place in the high-intensity neutral beam at the Alternating Gradient Synchrotron of Brookhaven National Laboratory, using a neutral beam stop, two analyzing dipoles, and redundant particle identification to remove backgrounds

Coherent production of the K-π+π- system in K-d interactions at 4.5 GeV/c

The reaction K-d→K-π+π-d has been studied at an incident K--momentum of 4.5 GeV/c. A fractional analysis has been performed. A spin density matrix analysis and a partial wave analysis indicate that the events in the Q-region mainly originate from {Mathematical expression} production in a JPℓmη=(1+S0+) wave state. A comparison has been made with the reaction K+d→K+π-π+d at 4.6 GeV/c and the combined results have been compared to K+/-p→K+/-π+π-p at 13 GeV/c. It is found that the Kππ-mass spectra produced on a proton or deuteron target can be described by one single Deck type mechanism on which direct Q-meson production is superimposed. © 1980 Springer-Verlag.SCOPUS: ar.jinfo:eu-repo/semantics/publishe