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

[Stepan Stepanyan]

Hello Reinhard,

As you just described, events are selected in the whole region below
the Kbar-N threshold. So, why not name it just that. Perhaps I am
reading it incorrectly. I would say events were selected between the
\Sigma\pi and the Kbar-N thresholds. Not a big issue.

Thanks, Stepan

On 11/4/13 4:05 PM, Reinhard Schumacher wrote:
> 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.
>>