[Clascomment] comments on pi+t paper

[Stepan Stepanyan]

  Hi Rakhsha,

Thanks for considering most of my comments. I still
have few left to be clarified. Here are comments, your
answers and my new questions:
oldQ - presentation of CMm angles are very confusing, they appear in 
different forms (lower case or upper case) with or without subscript, in 
one case it is superscript. This must be corrected, the same angle 
should be with the same font and superscripts or subscripts every where, 
in the text and on the figures

Answer: Please specify where these missmatches happens, I cannot find them.

newComment - as an example see first paragraph of the chapter C, you 
have definition
of the CM polar angle as $\theta_{t\pi^+}$ twice and are referring to 
Fig. 6 where the
same angle is on X-axis of bottom right plot is as $\Theta_{\pi t}. I do 
not have my
marked copy, but I remember there was one more place that the definition 
was incorrect.

oldQ- p6, left column, last paragraph, you wrote that \"value of each of 
these cuts is optimized such that the ...\", little suspicious. your 
cuts seems are round numbers. Besides it is not a good strategy to do 
cuts like that. In order to reproduce them in the simulations and get 
correct acceptances, cuts on variables that are detector resolution 
dependent must be in units of resolution of that parameter.

Answer: See above.

newComment - what you have for previous comment does not address my 
question here. I
understand what you want to say, but it is in general incorrect 
procedure. For example if your
resolution for some parameter are very different in the data and in 
simulations, fixed value cut
will introduce error in the calculation of acceptances.

oldQ - p8, left column, what is the definition of Q2, is it transferred 
momentum of the square of triton three momentum, I think these are 
different things

Answer: It is the squared of the 3-momentum of the triton. In principle 
this is differnt than the momentum transferred but here it can be 
considered also as the momentum
transfered to the triton because the triton is heavy and can be 
considered stationary
before the impact.

newComment - even you have stationary triton it is still wrong to call 
square of momentum as
transferred momentum. If target (triton) is at rest then Q2=2mT where m 
is the mass of the target
and T is it kinetic energy, p^2=E^2-m^2=T^2+m^2+2mT-T^2=2mT+T^2. You 
detected tritons
so T^2 is not negligible. This must be corrected.

Stepan