[Halld-physics] Eta Proposal

[Alexander Somov]

Hi Eugene,

Originally we decided to take the FDC out in order to
minimize uncertainties associated with conversion
inside the detector (though we already  have a relatively
massive CDC endplate...).

I've started thinking more of putting the FDC back - we have
to do more simulation here (probably we can do it by PAC).


Cheers,
        Sascha





On Tue, 1 May 2012, Eugene Chudakov wrote:

> Are you going to use the FDC for charged tracks?
>
> Eugene
>
> On Tue, 1 May 2012, Alexander Somov wrote:
>
>> 
>> Hi,
>> 
>> We are going to reconstruct recoil protons and
>> veto events with charged track. I dont' think that
>> the combinatorical background due to the pipeup
>> of em events only is an issue.
>> 
>> The em pileup with hadronic events is our concern.
>> 
>> Mark, we have already made some 'preliminary' estimates
>> of the hadronic bg - adding plots to the proposal.
>> 
>> Cheers,
>>        Sascha
>> 
>> 
>> 
>> 
>> On Tue, 1 May 2012, Mark M. Ito wrote:
>> 
>>> Folks,
>>> 
>>> I have to endorse Matt's last sentence:
>>> 
>>> On 04/30/2012 09:25 PM, Matthew Shepherd wrote:
>>>> There can always be the unknown background, but the minimum goal should 
>>>> be
>>>> to try to probe all possible known backgrounds.
>>>> 
>>> Said another way, if there are known, possibly significant backgrounds 
>>> that
>>> have not been estimated, you are not done. Estimates do not have to be
>>> iron-clad, but they do have to be reasonable.
>>>
>>>  -- Mark
>>> 
>>> --
>>> Mark M. Ito
>>> Jefferson Lab (www.jlab.org)
>>> (757)269-5295
>>> 
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>