[Clas_cascades] pentaquark search with pK0Km skim

[Igor Strakovsky]

Hi Zhiwen,

Thank you for your prompt reaction.  I would afraid to make a claim until
to get strong arguments.  It sounds that you do not have them yet

A little bit more below

On Sat, 13 Feb 2010 22:28:40 -0500, Zhiwen Zhao <zwzhao at jlab.org> wrote:

> 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.

As your slides shown that you did not do exact 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 

As far as you probably know, CLAS has so many standards.  It is good to
clarify them

> 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.

Sorry, I know nothing about your theses and would love to see your
Lambda(1520).  Unfortunately, the size of your figures do not allow
to see details

> I have MC for the Lambda1520 production, but not PK0Km yet.

Can you show them, please?  What did you use as the generator

> I will add more stuff on the wiki when the analysis proceeds.
> Any comment from you is greatly appreciated.

Thanks, I look forward to learn more details from you
Igor

> 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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>>> Clas_cascades mailing list
>>> Clas_cascades at jlab.org
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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