root [1] .ls TFile** /media/disk_2015_6T/Data/15GeV/data/sched2136C1AAED491449C880BB6EE43C634D_0.flow.nt.root TFile* /media/disk_2015_6T/Data/15GeV/data/sched2136C1AAED491449C880BB6EE43C634D_0.flow.nt.root KEY: TTree StrangenessDst;1 StrangenessDst root [2] StrangenessDst->Print() ****************************************************************************** *Tree :StrangenessDst: StrangenessDst * *Entries : 233 : Total = 3236082 bytes File Size = 1470110 * * : : Tree compression factor = 2.19 * ****************************************************************************** *Branch :strangenessEvent * *Entries : 233 : BranchElement (see below) * *............................................................................* *Br 0 :fUniqueID : UInt_t * *Entries : 233 : Total Size= 1512 bytes File Size = 114 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 8.93 * *............................................................................* *Br 1 :fBits : UInt_t * ////There are 233 events in this file *Entries : 233 : Total Size= 2432 bytes File Size = 520 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 3.76 * *............................................................................* *Br 2 :mZDC_EP[4] : Float_t * ////Event plane information from ZDC-SMD *Entries : 233 : Total Size= 5250 bytes File Size = 1552 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 3.06 * *............................................................................* *Br 3 :mZDC[16] : Int_t * ////ZDC ADC signals *Entries : 233 : Total Size= 16423 bytes File Size = 3541 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 4.50 * *............................................................................* *Br 4 :mZDCSMD[30] : Float_t * ////ZDC-SMD ADC signals *Entries : 233 : Total Size= 29486 bytes File Size = 2592 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 11.18 * *............................................................................* *Br 5 :mBBC[48] : Float_t * ////BBC ADC signals *Entries : 233 : Total Size= 46340 bytes File Size = 24011 * *Baskets : 2 : Basket Size= 32000 bytes Compression= 1.91 * *............................................................................* *Br 6 :mEventId : Int_t * ////Event Id, when thisevent was taken *Entries : 233 : Total Size= 1507 bytes File Size = 835 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 1.22 * *............................................................................* *Br 7 :mRunId : Int_t * ////Run Id, when this event was taken. For example: *Entries : 233 : Total Size= 1497 bytes File Size = 137 * ////16123145 means year 2016, 123th day of that year, and 145th run of that day *Baskets : 1 : Basket Size= 32000 bytes Compression= 7.41 * *............................................................................* *Br 8 :mTrigger : Int_t * ////Trigger used to select the event *Entries : 233 : Total Size= 1507 bytes File Size = 310 * ////Most commonly used trigger is minimum bias, or minbias or MB *Baskets : 1 : Basket Size= 32000 bytes Compression= 3.28 * *............................................................................* *Br 9 :mNumberOfV0s : Int_t * ////Number of particles recored in this event *Entries : 233 : Total Size= 1527 bytes File Size = 577 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 1.77 * *............................................................................* *Br 10 :mCentrality : UInt_t * ////Centrality, 0 means most central, 70-80% means peripheral *Entries : 233 : Total Size= 1522 bytes File Size = 328 * ////Usually minbias includes 0-80%. *Baskets : 1 : Basket Size= 32000 bytes Compression= 3.11 * *............................................................................* *Br 11 :mRefMult : UShort_t * ////Number of tracks recorded by TPC with |eta|<0.5 *Entries : 233 : Total Size= 1041 bytes File Size = 453 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 1.22 * *............................................................................* *Br 12 :mTOFmult : Int_t * ////Number of hits (from particles) recorded by ToF *Entries : 233 : Total Size= 1507 bytes File Size = 555 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 1.83 * *............................................................................* *Br 13 :mBfield : Float_t * ////Magnetic field *Entries : 233 : Total Size= 1502 bytes File Size = 116 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 8.76 * *............................................................................* *Br 14 :mPrimaryVertexPositionZ : Float_t * ////Vertex Z, where the collision occur along the beam direction *Entries : 233 : Total Size= 1582 bytes File Size = 1032 * ////Determined by TPC *Baskets : 1 : Basket Size= 32000 bytes Compression= 1.00 * *............................................................................* *Br 15 :mVPDEWdiff : Float_t * ////Vertex Z determined by VPD *Entries : 233 : Total Size= 1517 bytes File Size = 831 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 1.23 * *............................................................................* *Br 16 :mBBCCoin : Double_t * ////BBC coincidence rate *Entries : 233 : Total Size= 2439 bytes File Size = 656 * ////a measure of luminosity, how frequent the collision occurs *Baskets : 1 : Basket Size= 32000 bytes Compression= 2.97 * *............................................................................* *Br 17 :mZDCCoin : Double_t * ////ZDC coincidence rate *Entries : 233 : Total Size= 2439 bytes File Size = 363 * ////the luminosity measured with ZDC *Baskets : 1 : Basket Size= 32000 bytes Compression= 5.37 * *............................................................................* *Br 18 :fV0s : Int_t fV0s_ * *Entries : 233 : Total Size= 14012 bytes File Size = 569 * *Baskets : 1 : Basket Size= 32000 bytes Compression= 1.78 * *............................................................................* *Br 19 :fV0s.fUniqueID : UInt_t fUniqueID[fV0s_] * *Entries : 233 : Total Size= 148139 bytes File Size = 2118 * *Baskets : 5 : Basket Size= 32000 bytes Compression= 69.67 * *............................................................................* *Br 20 :fV0s.fBits : UInt_t fBits[fV0s_] * *Entries : 233 : Total Size= 148103 bytes File Size = 2196 * *Baskets : 5 : Basket Size= 32000 bytes Compression= 67.18 * *............................................................................* *Br 21 :fV0s.mFlagV0 : Int_t mFlagV0[fV0s_] * ////Flag of a track *Entries : 233 : Total Size= 148121 bytes File Size = 2193 * ////a tag of good or bad track *Baskets : 5 : Basket Size= 32000 bytes Compression= 67.28 * *............................................................................* *Br 22 :fV0s.mPtV0 : Float_t mPtV0[fV0s_] * ////pT, transverse momentum of a particle *Entries : 233 : Total Size= 148103 bytes File Size = 131276 * ////in unit of GeV/c *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.12 * *............................................................................* *Br 23 :fV0s.mEtaV0 : Float_t mEtaV0[fV0s_] * ////eta, pseudorapidity of a particle *Entries : 233 : Total Size= 148112 bytes File Size = 136773 * ////a proxy of rapidity, a reletivistic velocity *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.08 * *............................................................................* *Br 24 :fV0s.mPhiV0 : Float_t mPhiV0[fV0s_] * ////phi, azimuthal angle *Entries : 233 : Total Size= 148112 bytes File Size = 136823 * *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.08 * *............................................................................* *Br 25 :fV0s.mChargeV0 : Int_t mChargeV0[fV0s_] * ////electric charge *Entries : 233 : Total Size= 148139 bytes File Size = 15100 * *Baskets : 5 : Basket Size= 32000 bytes Compression= 9.77 * *............................................................................* *Br 26 :fV0s.mDcaV0 : Float_t mDcaV0[fV0s_] * ////DCA, distance of closest approach *Entries : 233 : Total Size= 148112 bytes File Size = 133426 * ////the distance between a particle track and the vertex *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.11 * ////if DCA is large, the particle is likely from secondary decay *............................................................................* *Br 27 :fV0s.mndEdxV0 : Int_t mndEdxV0[fV0s_] * ////number of dEdx hits of a track used to determine dEdx *Entries : 233 : Total Size= 148130 bytes File Size = 41936 * ////dEdx is the ionization energy loss of a charge particle *Baskets : 5 : Basket Size= 32000 bytes Compression= 3.52 * ////to identify particles, a pion or a kaon or a proton *............................................................................* *Br 28 :fV0s.mnSigma_piV0 : Float_t mnSigma_piV0[fV0s_] * ////Nsigma_pion, the likelihood of being a pion *Entries : 233 : Total Size= 148166 bytes File Size = 100588 * ////when it's zero, it's likely;when it's bigger than 3 or smaller than -3 *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.47 * ////it's 3 sigma away from being a pion *............................................................................* *Br 29 :fV0s.mnSigma_pV0 : Float_t mnSigma_pV0[fV0s_] * ////Nsigma_proton *Entries : 233 : Total Size= 148157 bytes File Size = 111983 * *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.32 * *............................................................................* *Br 30 :fV0s.mnSigma_kV0 : Float_t mnSigma_kV0[fV0s_] * /////Nsigma_kaon *Entries : 233 : Total Size= 148157 bytes File Size = 110087 * *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.34 * *............................................................................* *Br 31 :fV0s.mnSigma_eV0 : Float_t mnSigma_eV0[fV0s_] * /////Nsigma_electron *Entries : 233 : Total Size= 148157 bytes File Size = 100970 * *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.46 * *............................................................................* *Br 32 :fV0s.mTofFlagV0 : Int_t mTofFlagV0[fV0s_] * ////ToF flag, if it's bigger than 0, *Entries : 233 : Total Size= 148148 bytes File Size = 18412 * ////this particle has a ToF hit *Baskets : 5 : Basket Size= 32000 bytes Compression= 8.01 * *............................................................................* *Br 33 :fV0s.mTofYLocalV0 : Float_t mTofYLocalV0[fV0s_] * ////ToF Ylocal *Entries : 233 : Total Size= 148166 bytes File Size = 82796 * ////the distance between the ToF hit and the particle's track projection *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.78 * ////the closer the better *............................................................................* *Br 34 :fV0s.mTofV0 : Float_t mTofV0[fV0s_] * ////Time of flight of a particle before reaching ToF *Entries : 233 : Total Size= 148112 bytes File Size = 76515 * *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.93 * *............................................................................* *Br 35 :fV0s.mTofLengthV0 : Float_t mTofLengthV0[fV0s_] * ////Distance from vertex to the ToF hit *Entries : 233 : Total Size= 148166 bytes File Size = 78150 * *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.89 * *............................................................................* *Br 36 :fV0s.mTofM2V0 : Float_t mTofM2V0[fV0s_] * ////the mass squared of a particle *Entries : 233 : Total Size= 148130 bytes File Size = 138035 * ////determined by ToF *Baskets : 5 : Basket Size= 32000 bytes Compression= 1.07 * *............................................................................* *Br 37 :fV0s.mMtdFlagV0 : Int_t mMtdFlagV0[fV0s_] * ////MTD flag, if it's bigger than 0, *Entries : 233 : Total Size= 148148 bytes File Size = 2256 * ////this particle has a MTD hit *Baskets : 5 : Basket Size= 32000 bytes Compression= 65.41 * *............................................................................* *Br 38 :fV0s.mMtdDyV0 : Float_t mMtdDyV0[fV0s_] * ////MTD dy, along y direction *Entries : 233 : Total Size= 148130 bytes File Size = 2386 * ////the distance between the MTD hit and the particle's track projection *Baskets : 5 : Basket Size= 32000 bytes Compression= 61.84 * *............................................................................* *Br 39 :fV0s.mMtdDzV0 : Float_t mMtdDzV0[fV0s_] * ////MTD dy, along beam direction *Entries : 233 : Total Size= 148130 bytes File Size = 2400 * ////the distance between the MTD hit and the particle's track projection *Baskets : 5 : Basket Size= 32000 bytes Compression= 61.48 * *............................................................................*