Difference between revisions of "February 15th, 2017"
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| − | 3) LASS Proposal E-135, 1979 "Comparison of K-p and K+p Interaction, and Programmatic Study of Strange Quark Spectroscopy" [https://wiki.jlab.org/klproject/images/5/58/E135.pdf] | + | 3) MC-Mikhail: Updated plot of time uncertainty in Be target as a function of KL true momentum - it is tiny. One can safely neglect it. KL momentum resolution is indeed fully determined by the start counter time resolution.[https://wiki.jlab.org/klproject/images/b/b0/Be_time_un.gif] |
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| + | 4) LASS Proposal E-135, 1979 "Comparison of K-p and K+p Interaction, and Programmatic Study of Strange Quark Spectroscopy" [https://wiki.jlab.org/klproject/images/5/58/E135.pdf] | ||
* 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." | * 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." | ||
Revision as of 17:54, 8 February 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: As I expected the DIRC region of interested for the DIRC (theta < 10 and p > 2 GeV) is not a large part of the phase space for these reactions. It should be available to use at that time, but I don’t think it’s a driver for the proposal. A more interesting study would be to understand the pi/K separation provided by the BCAL timing which is where the vast majority of your events will be located.
2) Neutron background
- Igor:
3) MC-Mikhail: Updated plot of time uncertainty in Be target as a function of KL true momentum - it is tiny. One can safely neglect it. KL momentum resolution is indeed fully determined by the start counter time resolution.[6]
![[6]](https://wiki.jlab.org/klproject/images/b/b0/Be_time_un.gif){kind=link}
4) LASS Proposal E-135, 1979 "Comparison of K-p and K+p Interaction, and Programmatic Study of Strange Quark Spectroscopy" [7]
- 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.