[Clascomment] OPT-IN:Differential Photoproduction Cross Sections for the Sigma0(1385), Lambda(1405), and Lambda(1520)

[Reinhard Schumacher]

Hello Dan,
	Thanks for pointing out that paper.  I had a look at it.  The cross 
section for the Sigma(1385) is literally an order-of-magnitude 
measurement and below our measured photon energy range, so we can't use 
it.   The Lambda(1405) measurement is consistent with zero, and is at 
the very bottom edge of our measured range, and so is not useful for 
comparison.  The Lambda(1520) measurement is only an upper limit and 
clearly incompatible with our measurement.  However, the paper also 
quotes another paper (Blanpied et al) in which the Lambda(1520) was 
measured at one angle and energy.  That measurement is compatible with 
our data if we extrapolate to smaller angles than measured in CLAS.  I 
expect we will at least reference these two papers and perhaps include 
the one data point for the Lambda(1520).

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
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On 05/01/2013 04:27 PM, Daniel Sober wrote:
> The historical data for Sigma(1385) and Lambda(1405) photoproduction also include a measurement of the differential cross section near 90 degrees at the Cornell 2 GeV synchrotron:   N.B. Mistry, S. Mori, D.I. Sober and A.J. Sadoff,  Physics Letters 24B, 528 (1967).
>