Re: distinguishing single end hits from non-shower hits

["Kornicer, Mihajlo" <mikornic@indiana.edu>]

Hi Mark and Blake,

>> if a hit originated from the middle of the counter it would probably
>> be seen by both ends.
> Unless one end is dead for some reason.

Mark is right, but dead channels will become an issue in a couple of 
years. At that time monitoring should be in place, and cold, as well as 
hot, channels can be flagged and treated differently anyway. Right now 
reconstruction software assumes symmetric upstream/downstream 
efficiencies, and if one later discovers asymmetry, for any reason, the 
"middle" point could be adjusted accordingly. In order to make the 
physics case for saving shower outskirts there is no reason to 
associate random upstream hits with downstream showers and vice versa, 
regardless of the actual cost/benefit of salvaging single-end hits.

Cheers,
Mihajlo

Quoting "Mark M. Ito" <marki@jlab.org>:

> Kornicer, Mihajlo wrote:
>>
>> Hi Blake,
>>
>> if a hit originated from the middle of the counter it would probably
>> be seen by both ends.
> Unless one end is dead for some reason.
>
>
>