[Clas12_verystrange] Cascade comparison

[Michael Dugger]

Hi,

A comparison to g12 would be very helpful. I appreciate any help in getting 
a comparison.

Currently, I am generating virtual photons with energies from 7 to 10 GeV. 
The acceptance is determined by the fastmc.

I require there to be at least two K+ seen and that two of the K+ have a 
vertex within 0.5 cm of each other. The two K+ that match the vertex 
requirement are kept and any other possible K+ are neglected.

When I put in an estimated PID, I get the plot attached (kkx.gif).

I can generate other photon energy distributions (real or virtual) if that 
is of any help. Also, I have a version of the generator to output BOS 
banks. If need be, we could run a g12 GSIM.

Take care,
Michael

On Tue, 28 Feb 2012, Johann Goetz wrote:

> Mike,
> If you let me know what cuts you are making for event selection I can give
> you a direct comparison to g12 very quickly.
> --
> Johann
>
> On Mon, Feb 27, 2012 at 11:33 AM, Igor Strakovsky <igor at va.gwu.edu> wrote:
>
>> Mike,
>>
>> How is about to use Johann's result as well.  Johann, can you please
>> provide Mike your figures?
>>
>> Thanks, Igor
>>
>>
>> On Mon, 27 Feb 2012 11:27:56 -0500 (EST), Michael Dugger <dugger at jlab.org>
>> wrote:
>>
>>>
>>> John,
>>>
>>> I was just trying to get a feel for the background to expect and
>>> quickly found your results off the web. No big deal. I will start using
>>> Lei's stuff.
>>>
>>> As far as the backgrounds go, we just need some way to verify that they
>>> look reasonable.
>>>
>>> I am new to this strange stuff and have not committed to memory what the
>>> latest and best results are.
>>>
>>> Please bear with me as I get up to speed.
>>>
>>> Take care,
>>> Michael
>>>
>>> On Mon, 27 Feb 2012, John Price wrote:
>>>
>>>> Hi Mike:
>>>>
>>>> I haven't been able to participate in the meetings lately (see my
>> message of
>>>> a few minutes ago); why are you comparing to my results rather than Lei
>> Guo's
>>>> from 2007, which are probably superior in every way?
>>>>
>>>> John
>>>>
>>>> --
>>>> John W. Price
>>>> Professor and Chair of Physics
>>>> CSU Dominguez Hills
>>>> 310-243-3403
>>>>
>>>> -----Original Message-----
>>>> From: Michael Dugger <dugger at jlab.org>
>>>> Sender: "clas12_verystrange-bounces at jlab.org"
>>>>      <clas12_verystrange-bounces at jlab.org>
>>>> Date: Fri, 24 Feb 2012 09:53:52
>>>> To: clas12_verystrange at jlab.org<clas12_verystrange at jlab.org>
>>>> Reply-To: "clas12_verystrange at jlab.org" <clas12_verystrange at jlab.org>
>>>> Subject: [Clas12_verystrange] Cascade comparison
>>>>
>>>>
>>>> Hi,
>>>>
>>>> I have attached a plot of Cascade-(1321) using the same code that I used
>>>> to generate the Omega- (cascadeM.gif). The plot is the missing mass
>>>> spectrum (MassX) from the reaction:
>>>> gamma p -> K+ K+ X
>>>>
>>>> I have also included plots from John Price's paper showing the same
>>>> spectrum from g6 data (PriceCascade.png).
>>>>
>>>> The incident photon energy range for the g6 experiment is, of course,
>>>> different than what CLAS12 will have, however, the signal to background
>>>> ratio I get in my plot looks somewhat consistent with what John saw from
>>>> g6 data.
>>>>
>>>> Perhaps the simulated backgrounds are not too far off from reality?
>>>>
>>>> Take care,
>>>> Michael
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>>
>
>
>
> -- 
> Johann T. Goetz, PhD. <http://sites.google.com/site/theodoregoetz/>
> jgoetz at ucla.edu
> Nefkens Group, UCLA Dept. of Physics & Astronomy
> Hall-B, Jefferson Lab, Newport News, VA
> Office: 757-269-5465 (CEBAF Center F-335)
> Mobile: 757-768-9999
>
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