Muons(UnMatched)

 N
 -----
 The number of central-track matched muons of all kinds.  

 Exchange 29-Apr-2003:
 Question (HTD): What kinds of tracks can be matched? What are the matching criteria?
 Answer      (): 

 PT
 -----
 The pT (GeV/c) of all muons. 

 ETA
 -----
 Eta of all matched muons. The boundary of the central muon system is between |eta| of 0.8 
 to 1.0 and is phi-dependent. The reason it is not at a fixed place is that the
 central muon system is rectangular sides of a box-shape. The boundary of the 
 forward muon system is at |eta| of 1.6 to 2.0 for similar reasons. 

 I think the forward has more muons than the central because the forward muon
 system has more acceptance at low pT than the central. It takes about 4.5 GeV/c for
 a muon to penetrate the toroid magnet.

 This is the eta of the track. 

 PHI
 -----
 Phi of tracked muons. The distribution is the folding of the muon acceptance
 with the tracker efficiency.

 CHISQ
 -----
 The chi-sq of the track fit.  

 CHISQLOC
 --------
 The chi-sq of the fit for the muon local track (muon hits only).

 E33
 -----
 The energy deposited in a 3x3 cone in the calorimeter (corresponding to
 delta eta x delta phi of 0.3 x 0.3) centered around the expected position
 the muon enters it.  Muons deposit between 1 and  2.5+ GeV in the 
 calorimeter depending on the angle it goes through. 

 HALO
 -----
 The energy in a ring of inner radius xxx and ounter radius yyy.
 This helps determine muon isolation.

 W HITS A
 --------
 The number of PDT and/or MDT hits in the A-layer. Most of
 the A-layer has 4 decks. The central bottom has 3 decks.
 Parts of octant 5 & 6 have no A-layer coverage at all.

 Exchange 29-Apr-2003:
 Question (HTD): Is this hits or decks?
 Answer      (): Hits.

 W HITS BC
 ---------
 The number of PDT and/or MDT hits in the B and C layers, summed.
 These chambers have 3 decks. The peak at zero is A-stubs.
 
 SCINT HITS A
 ------------
 The number of A-layer scintillator hits.

 SCINT HITS BC
 -------------
 The number of B + C layer scintillator hits. The central has,
 except in some special places, only one b or C layer of 
 scintillator.  The forward muon system usually has both.