Line: 1 to 1  

L0 Confirmation using the T stations (Hadron alley)  
Line: 50 to 50  
On the use of Scurve corrections in the ECAL  
Changed:  
< <  First a decision has to be made on the theshhold above which we assume the energy deposit in the ECAL is associated to the hadron shower. As a guide, we look at the Scurves in the ECAL as a function of energy (not E_T!) cutoff. Where no cutoff is applied, additional energy is seen occuring on only one cell. Visually this 'noise' is represented as tails away from the Scurve. These tails are seen to reduce with large cut on the ECAL energy deposit considered.  
> >  As above, an sCurve correction can be applied. The parameters and observed improvement are recorded in the following table.  
Changed:  
< < 
 
> > 
The corrective effect of the Scurve correction is can be visualised here: (before correction), (correction applied).
Finally a decision has to be made on the theshhold above which we assume the energy deposit in the ECAL is associated to the hadron shower. As a guide, we look at the Scurves in the ECAL as a function of four energy (not E_T!) cutoffs. To partially remove the noise tails seen at the edges of the curves, a energy cut of 1000MeV and 500MeV is applied for the inner and middle part of the ECAL. No cut is deemed necessary for the outer part. Predicting the particle track into the Tstations To predict the track of the L0 Candidate, it is assumed the particle has followed a straight line from the IP (0,0,0) in y. For x, the deviation from a straight line due tothe magnetic field is assumed to be inversely proportional to the particle's energy. See the following sketch by Herve...
The parameter "alpha" is obtained from a 350k minimum bias Monte Carlo sample and is recorded in the following table:
 
 
Added:  
> > 
