C C *** SM3 variables *** C x3p/n x of track at sm3 for particle (u/d) C y3p/n y " " " " " " " C z3p/n z " " " " " " " C tnx3p/n Tangent of theta x at sm3 (incomming) C tny3p/n " " " y " " " C tny3pp/n " " " y " " (out going) C p3p/n Particle Momenta at sm3 **IN THE YZ PLANE** C C *** Target variables--Uniterated *** C xplus/minus x intercept of track at target C yplus/minus y " " " " " C zunin z of closest approach of tracks near target C C *** Y values along the way *** C y86p/n y at 86 in C y104p/n " " 104 in C y236p/n " " 236 in C C *** Target variables--Iterated*** C xt x position of interaction C yt y " " " C zt z " " " C tnxtp/n Tangent of theta x C tnytp/n " " " y C ptgtp/n Momentum at target **IN THE YZ PLANE** C ptxyp/n transverse momentum at target C C *** number of tracks *** C mutrak number of muon tracks in event C C *** Kinematic dimoun event variables **** C pt Transverse momenta C dimom momenta of the dimuon pair C xf, x1, x2 xf, x1, x2 C am invariant mass of dimuon pair C pphi Production phi in C-S frame C dphi Decay phi in C-S frame C dtheta Decay Theta in C-S frame C C *** Event data *** C kevcnt event number C hour time in hours C day time in days C tbin trigger bits words 2, 3 (numbered from 0) C inputs to the triggers C tbraw trigger bit words 4, 5 (numbered from 0) C raw triggers C tbpre trigger bit words 6, 7 (numbered from 0) C prescaled triggers C tbtgt trigger bit word 11 (numbered from 0) C target position from trigger bits C Note on trigger bits: The bits are packed into the lower C 16 bits of int*4. In the case of row wise ntuples, C these values are then floated into real*4 values which C are then entered into the ntuple. C tbraw_ck Don K.'s reconstructed tbraw bits C rfscal rfscaler C nhodfir number of hodoscope hits C nevlen raw event length C nroad number of matrix roads C C *** Spill data *** C irun run number C kspill spill number C egs egs C sem sem6 counts C semsb sem6 and not busy C amon amon C amonsb amon and not busy C live live time (sem6sb/sem6) C x134l/r/lr counts in x134l,r,lr C bpmx,y bpmx,y C bpmxi,yi bpmxi,yi C lamb4 Counts in lambda/4 C duty Duty factor C tbrawh MJL simple reconstructed tbraw bits C tgt Target position from target position scaler C pa1,2,3,4 number of physA1/2/3/4 triggers in spill C ic3 ic3 C ic3sb ic3sb C tfi tfi C tgo tgo C goodsp 1=spill is good, 0=spill is bad C likesn 1=analysis done on like sign pairs, 0=opposite sign C cbm beam cerenkov adc for intime bucket C cbmsum beam cerenkov adc sum C cbmbavg beam cerenkov average over outtime buckets C C *** Monte Carlo data--all quantities are thrown/generated *** C amth thrown mass C xfth " xf C ptth " pt C [x|y|z]vth " vertex location C p[x|y|z][1|2]th C thrown x/y/z momenta of track 1/2 C p3yz[1|2]th generated yz momenta of track 1/2 at sm3 (compare C with p3[p|n]) C p3[x|y|z][1|2]th generated x/y/z momenta of track 1/2 before sm3 C tn3yp[1|2]th generated yz tangent AFTER sm3 (before can be found C from p3y1th/p3z1th) C [x|y|z]3[1|2]th generated x/y/z location for track 1/2 at sm3 bend C plane C p[1|2]abs[1..8]th generated absolute momenta for track 1/2 before C entering absorber section 1-8 (8 is actually just C after tha absorber) C costth thrown cos(theta) C pphith " production phi C dphith " decay phi C weight[1|2] user defined quantaties (weights) C *** Level 3 data *** C l3bit level 3 result bits (0-7) C 0 - tagging-only mode C 1 - abort C 2 - special test mode C 3 - passed due to prescale C 4 - passed mass cut C 5 - passed pt cut C 6 - passed xf cut C 7 - passed other physics cut C am_l3t maximum target mass from level 3 C pt_l3t maximum target pt from level 3 C xf_l3t maximum target xf from level 3 C nt_l3t number of target tracks from level 3 C am_l3d maximum dump mass from level 3 C pt_l3d maximum dump pt from level 3 C xf_l3d maximum dump xf from level 3 C nt_l3d number of dump tracks from level 3 C tracks 1 & 2 below are those that made the maximum mass C p1_l3 momentum of target track 1 C p2_l3 momentum of target track 2 C p1_l3d momentum of dump track 1 C p2_l3d momentum of dump track 2 C ty1_l3 thetay of target track 1 C ty2_l3 thetay of target track 2 C ty1_l3d thetay of dump track 1 C ty2_l3d thetay of dump track 2 C y11_l3 y at station 1 for target track 1 C y21_l3 y at station 2 for target track 1 C y31_l3 y at station 3 for target track 1 C y12_l3 y at station 1 for target track 2 C y22_l3 y at station 2 for target track 2 C y32_l3 y at station 3 for target track 2 C y11_l3d y at station 1 for dump track 1 C y21_l3d y at station 2 for dump track 1 C y31_l3d y at station 3 for dump track 1 C y12_l3d y at station 1 for dump track 2 C y22_l3d y at station 2 for dump track 2 C y32_l3d y at station 3 for dump track 2