[Clascomment] OPT-IN: First Observation of the Line Shape of the Lambda(1405) in Electroproduction

[Reinhard Schumacher]

Hello Paul,

The two-pole interpretation comes from chiral unitary theory (cited in 
the paper) that regards the L(1405) as the poster child of a dynamically 
generated resonance.  In many theoretical papers in the last decade, 
evidence is discussed that there are two isospin zero poles that 
contribute to the L(1405).  One of them couples more strongly to Sigma 
pi, and the other couples more strongly to N K-bar.  The qualitative 
prediction is that what you see in the L(1405) region depends on how you 
excite it.  We are the first to do this using electroproduction.  We use 
that language in our paper because we have been strongly biased by these 
theoretical considerations.

I think you are right about not mentioning the specific CLAS data set, 
e1f, in the abstract: it is not relevant for the reader to know that 
initially.

We are getting pretty close to releasing a revised draft of the paper, 
and we'll include that change.

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 06/14/2013 09:39 AM, Paul Stoler wrote:
> This is a very interesting result. Why are these two peaks not two resonances as opposed to one resonance with two poles?
> Don't use e1c in the abstract, since only CLAS users (authors) will know what that means.
>