[Clascomment] OPT-IN: Measurement of the Spin and Parity of the Lambda(1405)

[Reinhard Schumacher]

Hello Stepan,

	I'm not sure what you're concern is.  1.32 GeV is just the Sigma pi 
threshold, so we are saying we start the integration at threshold.  1.45 
GeV is where the main bump of the Lambda(1405) is finished, and 1.45 GeV 
is above the Kbar-N threshold at 1.44 GeV, in the range where most of 
the decays are expected to go to that channel instead of Sigma pi.  In 
between these limits there is some contamination from Sigma(1385), but 
as you can see in Table 1 it is about 10%, so it is not an exaggeration 
to say that the L(1405) is "dominant".  Furthermore, later in the paper 
we set limits on the systematic uncertainty by chopping out even more of 
the Sigma(1385), and find that it is very small.

Cheers,
Reinhard
___________________________________________________________________
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
___________________________________________________________________

On 11/04/2013 03:43 PM, Stepan Stepanyan wrote:
> * page 3, line 158-159 - "mass range of 1.30–1.45 GeV/c2, where the spectrum is dominated by the L(1405)", I am not sure this statement is correct. Looking on distribution in Fig.2a, there is almost no L(1405) below 1.35 GeV/c2and below 1.42 GeV/c2 there is significant contribution from S60(1385).  Can you please explain how this cut was determined.
>