February 15th, 2017

Tentative Agenda:

1) Status of DIRC & impact for KL

• Nick: Looked at theta vs p for the Kaon and pion 4 reactions:

-- KLp-->pi+Sigma0: [1]

-- KLp-->pi0Sigma+: [2]

-- KLp-->pi+Lambda: [3]

For the Lambda reaction, I also decayed the Lambda and looked at the pi- distribution. The same was performed for the Sigma+ reaction (Sigma+ —>n pi+). -- KLp-->pi+Lambda: [4]

-- KLp-->K+n: [5]

These are pure phase space generated reactions, with the beam momentum taken from the beam profile from Simon (up to ~6 GeV/c).

• Justin:

2) Neutron background

• Igor:

3) LASS Proposal E-135, 1979 "Comparison of K-p and K+p Interaction, and Programmatic Study of Strange Quark Spectroscopy" [6]

• Jim Napolitano: "The point of the experiment was to make good use of the very pure K- and K+ beams you could get at SLAC,

thanks to the RF separation technique and the pulsed electron beam. The main addition was a solenoid (which is now the main magnet for GlueX) and trigger-able proportional chambers surrounding the target, which gave them essentially full 4pi coverage.

Almost all of the results were on spectroscopy of strange (or multi strange) particles. They did some excellent work on the excited kaon spectrum, and found a number of new strange baryons, including an excited Omega. These papers should be easy enough for you to find.

So far as I’m aware, nobody ever published any results using the K+ beam."

5) etc.