[Clas_cascades] pentaquark search with pK0Km skim

[Zhiwen Zhao]

Hi, Igor

No, I am not sure at this point as the result is just a first look into 
the data, not even qualified as preliminary.
However these cuts I showed are supposed either to enhance the theta+ 
signal or to match LEPS condition.
I have looked their Anti-cuts also, no sign of theta+ either.
Some cuts I didn't show such as photon selection,PID, fiducial, vertex, 
sc dad counter etc, are mostly standard and similar to what Hovanes used 
in his eg3 pentaquark Phi-- upper limit analysis which is currently 
under review.
The same PK0Km channel is used for Lambda1520 study which is my thesis 
topic, I have preliminary cross section now.
I have MC for the Lambda1520 production, but not PK0Km yet.
I will add more stuff on the wiki when the analysis proceeds.
Any comment from you is greatly appreciated.

Zhiwen


On 2/12/2010 1:14 AM, Igor Strakovsky wrote:
> Hi Zhiwen,
>
> How are so sure?  You made so many cuts...  Can you explain all of them?
> Can you show any well known resonances?  Do you have MC?
>
> Igor
>
> On Fri, 12 Feb 2010 01:04:37 -0500, Zhiwen Zhao <zwzhao at jlab.org> wrote:
>
>> hi, Eg3er
>>
>> Here is some updates of the pentaquark search with pK0Km skim
>> http://clasweb.jlab.org/rungroups/eg3/wiki/index.php/PrtK0Km_theta1530
>> So far, there's no sign of pentaquark.
>> Any commend is appreciated.
>>
>> Zhiwen
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>
> Igor Strakovsky, SAID CNS The George Washington University
> Tel: 703-726-8344(NV),202-994-4742(FB),Skype: igors1945_2
> Fax: 202-994-3001(FB),Emails: igor at va.gwu.edu, igor at jlab.org