Loose Selections of Different Chanels in AATrack
              --------------------------------------------------

Loose selections are used for the event skimming. For actual
analysis the tight cuts are applied.

1. Selection of inclusive muons
   
   selectMuo = true

   - certified muons;
   - nseg > 0;
   - pt > 1.5 GeV/c
   - Chi2 of local fit of muon >= 0
   - N(SMT) hits > 1
   - N(CFT) hits > 1

2. Selection of (mu D0 X) events
   
   selectBD0MuFlag = true

   - muon as above + nseg > 1 + ptot(mu) > 3 GeV;
   - 2 tracks of opposite charge with pt > 0.7 GeV and in the same
     jet as muon;
   - N(SMT) > 1 for each track;
   - N(CFT) > 1 for each track;
   - K is selected according to the charge of muon;
   - 1.4 < Mass(Kpi) < 2.2;
   - Significance > 2 for each track;
   - Chi2 of (Kpi) vertex < 9;
   - distance/error in axial plane > 3.;
   - cosine of angle between direction and momentum of D0 > 0.8;
   - 2.0 < Mass(mu D0) < 5.2;
   - chi2 of (mu D0) vertex < 9;
   - if B-vertex is after D-vertex, distance/error between B and D < 3;

3. Selection of (mu Ds X) events (Ds -> phi pi)

   selectBDsMuFlag = true

   Loose selections:

   - muon as above + nseg > 1 + ptot(mu) > 3 GeV;
   - 3 tracks with pt > 0.7 GeV and in the same
     jet as muon;
   - N(SMT) > 1 for each track;
   - N(CFT) > 1 for each track;
   - M(KKpi) < 2.3 GeV;
   - M(KK) < 1.07 GeV;
   - cosine of angle between direction and momentum of Ds > 0.85;
   - distance/error in axial plane > 3.;
   - 1.5 < Mass(mu Ds) < 5.5;
   - chi2 of (mu Ds) vertex < 16;
   - if B-vertex is after Ds-vertex, distance/error between B and Ds < 3;
   - if distance/error for B-vertex > 4, cosine of angle between
     B direction and momentum > 0.95;

   Tight Selections (applied in addition to the loose selections):

   - 1.008 < M(KK) < 1.028 GeV;
   - distance/error in axial plane > 5.;
   - cosine of angle between direction and momentum of Ds > 0.90;
   - chi2 of Ds vertex < 16.;
   - if B-vertex is after Ds-vertex, distance/error between B and Ds < 2;
   - (significance)^2 of pi w.r.t. primary vertex > 4;
     (significance)^2 = (imp_ax/sig_ax)^2 + (imp_st/sig_st)^2
   - (significance)^2 of at least one K > 4;
   - 2.6 < Mass(mu Ds) < 5.4;
   - Pt(mu) w.r.t. Ds > 0.7 GeV/c;
   - Pt(Ds) > 2.5 GeV/c;
   - Ptot(mu Ds) > 7 GeV/c;

4. Selection of 2 muons (J/psi and High mass di-muons)

   selectJPsiFlag = true

   - 2 certified muons of opposite charge;
   - pt > 1.0 GeV for each particle;
   - N(CFT) > 1 for each particle;
   - at least 1 muon with nseg == 3;
   - if nseg > 0, than pt > 1.5 GeV
     (i.e. allow pt < 1.5 GeV only for nseg = 0 muons);

   - if nseg == 0 for given particle:
       - nmtc() >= 0; (see MuonParticle class)
       - CalEsig() > 0.015*CalNLayer(); (see MuonParticle class)
       - Ptot < 7;
       - Pt of second muon > 2.5;
       - chi2 of global muon fit < 25 for both particles;
       - Pt(mu mu) > 4.0 GeV;
     {endif}

   - M(mu mu) > 2.5 GeV;
   - if M(mu mu) > 3.6 GeV:  (High di-muon mass selection)
       - nseg > 1 for both muons;
       - pt > 2.5 GeV for both muons;