[Halld-physics] Lambda-anti-Lambda talk for HYP2018

[Reinhard Schumacher]

Hello All,

The link below is a revised draft talk I plan to give at the HYP2018 conference next week (6-26-18).   Changes since the presentation at the GlueX meeting yesterday (6-21-18) include:

- show Lambda-anti-Lambda invariant mass (IM) distribution with explicit statement that no unexpected narrow structures are seen;  same for p-anti-Lambda IM.

- remove slides showing E_gamma vs. IM and t vs. IM and t’ vs. IM.   These slides are moved to the back-up slide section.   You can see there that there is nothing qualitatively different between looking at t or t’.   (I added the plot for t  vs. IM since yesterday.)  You will see that as -t  or -t’  increases, where you would expect the IM distribution to broaden, there is actually no broadening visible, despite the decreasing overall statistics.    This is a topic for future further study, but not for this talk.

- remove numerical values for uncorrected hyperon lifetimes, but show the ratio (which should be acceptance-independent), which allows for easy comparison to the PDG value.   The point is that we are not statistically competitive now, though we may eventually collect sufficient additional statistics.  

- inserted a slot for putting a list of hyperon-related measurements within GlueX (from Justin).   

https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3686 <https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3686>

Further comments welcome,

Reinhard
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Reinhard Schumacher         Department of Physics, 5000 Forbes Ave.
Carnegie Mellon University, Pittsburgh, PA 15213, U.S.A.
phone: 412-268-5177           web: www-meg.phys.cmu.edu/~schumach <https://urldefense.proofpoint.com/v2/url?u=http-3A__www-2Dmeg.phys.cmu.edu_-7Eschumach&d=DwIFaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=tkzhhpt64rRw6UYYOiZUvX2EnoOb8Z04QVfRqLSRE8Q&m=vlcd7MsZ5kx1ggledd4ZkcbtQ18g6O4sRerZeolCGT4&s=YoY7Yv3FjlaE9sgdi359XJeci__OBA_etDmq7GBdDGo&e= >
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