[G12] eta phi acceptance

[Carlos Salgado]

Dennis
these were my expectations from Ted's paper for g6c I did some time ago.
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Expected Events in phi(1680)-> eta.phi

Formaly Measured g.p -> pKK     is sigma= 8 nb

>From Barnes, Page and Black         BR(eta.phi)/BR(KK) = 0.5

therefore, expected sigma(1680->eta.phi) = 4 nb

N (events) = (Na*rho*L)*I*sigma            all g6c data        I= 
3.6*10^12 photons

N=3,069 events         N(observed) = N*Acceptance              Acceptance 
(pKK) = 0.7 % (Monte Carlo)

N(expected)= 20 events
N(seen) is about 20 events 
-------------------------------------------------------------------------
If we have 10 more events  g12 will see about 200? but I do not know how 
the acceptances compare.

--  --  --  --  --  --  --  --  --  --  --  --  --  --  --  --  --  --
Carlos W. Salgado
Professor of Physics and Astronomy
Director, NSU Astronomical Observatory
Norfolk State University, Norfolk, VA23504        tel: (757)823-9212/8909
Jefferson Lab, Newport News, VA23606              tel: (757) 269-7859
fax: (757) 823-8817, e-mail:salgado at jlab.org or carlos at nsu.edu
http://www.jlab.org/~salgado
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On Mon, 10 Jan 2011, Dennis Weygand wrote:

> Muskesh,
>
> based on gsim, can you give me a rough estimate for the acceptance of a meson of mass ~1680 MeV decaying to phi eta in g12?
> How many phi eta events do you have?
>
> Dennis
>
>
> --
> Dennis Weygand
> weygand at jlab.org
> (757) 269-5926
>
>
>
>
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