[Halld-cal] Preshower information in BCAL showers

[Christina Kourkoumeli]

Hi all,
I second the voices expressed for the change. Both ATLAS and CMS us 
epreshowers and they are very helpful in e/pi separation and even in 
some cases of  e/gamma separation when the track of the electron for 
some reason or other is not there.
                          Cheers,
                       Christine
On 25/8/2016 9:23 μμ, Mark Macrae Dalton wrote:
> Hi all,
>
> There is a proposal to alter the DBCALShower object to add an 
> additional piece of information for each shower, this being the energy 
> deposited in the first layer.  The idea is to use this energy as 
> “preshower" information to help with particle identification.  The 
> proponents desire to have this included in the next analysis launch 
> which goes next week.  No specific studies have yet been done to 
> predict the effectiveness of this in our case, but in general it is a 
> useful technique.
>
> Implementing this would require a change to the REST data format to 
> accommodate the new data member.  This would essentially be a 
> permanent change for reasons of backwards compatibility.  These kinds 
> of changes therefore require some amount of consensus.  So, here is 
> your opportunity to comment.
>
> Best,
> Mark Macrae Dalton
>
>
>
>
>
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