The comparison on pi0 mass and width in different combinations of the supermodules

Statistics

LHC10c and LHC10e

Cluster selection

  1. Misalignment from Rongrong applied
  2. Pi0 calibration coefficients applied
  3. Non-linearity correction applied (currently used the old "plateau" correction, the same as https://twiki.cern.ch/twiki/bin/view/ALICE/EMCALnonlinCorr)
  4. Number of cells in cluster: no cuts
  5. Cluster pt threshold: 0.5 GeV/c
  6. Clusters with the leading cell closer that 1 cell to the SM edge and to warm cells were removed.

Symmetric Pi0 decays, pi0 mass vs E/2 of pi0

Symmetric pi0 decays are important for the current non-linearity correction. Looking at them one can have an idea how good the non-linearity actually works.

Both photons in one supermodule.

EMCAL_pi0massE_SM.png

One photon in one supermodule, another in the other. Two supermodules in one sector.

EMCAL_pi0massE_sameSec.png

One photon in one supermodule, another in the other. Two supermodules in different sectors.

EMCAL_pi0massE_difSec.png

Combined plot.

EMCAL_pi0massE.png

Pi0 mass vs pt

Both photons in one supermodule.

EMCAL_pi0mass_SM.png

One photon in one supermodule, another in the other. Two supermodules in one sector.

EMCAL_pi0mass_sameSec.png

One photon in one supermodule, another in the other. Two supermodules in different sectors.

EMCAL_pi0mass_difSec.png

Combined plot.

EMCAL_pi0mass.png

Pi0 width vs pt

Both photons in one supermodule.

EMCAL_pi0width_SM.png

One photon in one supermodule, another in the other. Two supermodules in one sector.

EMCAL_pi0width_sameSec.png

One photon in one supermodule, another in the other. Two supermodules in different sectorsEMCAL_pi0width_difSec.png

Combined plot.

EMCAL_pi0width.png

How two cluster invariant mass in two supermodules look like?

In two supermodules in the same sector

photons in SM0 and SM1

Inv_SM01.png

photons in SM2 and SM3

Inv_SM23.png

Two supermodules in different sectors

photons in SM0 and SM2

Inv_SM02.png

photons in SM1 and SM3

Inv_SM13.png

Two supermodules in different sectors, diagonal supermodules

photons in SM0 and SM3

Inv_SM03.png

photons in SM1 and SM2

Inv_SM12.png

-- OlgaDriga - 03-Nov-2010

One photon in one supermodule, another in the other. Two supermodules in one sector.

One photon in one supermodule, another in the other. Two supermodules in different sectors.

Combined plot.

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