[Clas12_verystrange] devil's advocate at Tuesday meeting

[Derek Glazier]

Hi Lei,
   A few answers...

On 04/09/12 16:20, Lei Guo wrote:
> Hi, Folks,
>
> THe proposal has been submitted on Friday. For tomorrow's meeting, I'm
> hoping everyone can play devil's advocate and poke holes in the
> proposal. Here is a list of questions that I think might come up
> during the proposal:
>
> 1. All benchmark reactions require the usage of FT and missing mass
> technique. However, in all our simulation, the resolution of FT is not
> taken into account yet. IF it has been, how will it affect the signal/
> background ratio, for Omega-, for example?
The FT resolutions WERE in the simulations I ran. I think also Mike 
Dugger's too. These were the same as for the meson proposal.
> 2. There seems to be some inconsistency between Johann's XI(1820)'s
> efficiency number (detecting K+K+K-p, four charged particles) and
> MIchael/Derek's Omega- number (detecting K+K+K0, four charged
> particles). Is this a result of different generator (t-channel Y* VS
> phase space) or something else?
It could be generator, I just used phase space, or it could be 
kinematics, the proton and K- can have quite different distributions 
(and therefore acceptances) to a pi+pi-. There will also be a branching 
ratio factor, 35% branch for a K0 to pi+pi-, so this is already a factor 
3 in the acceptance. i.e. if I had just quoted the acceptance for the 
K+K+pi+pi- it would have been 15%.
> 3. Is kaon decay addressed in fastMC?
Not as far as I can see.
>
> Please come up a list of "holes", as well as answers if you can :).
>
> Cheers!
>
> Lei
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