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Calorimeter meeting 2012/ 07/25

Calorimeter meeting 2012/ 07/25. Calibration & condDB status O. Deschamps LPC-Clermont- Fd. 1. 2012 Calibration. 2012 Ecal Calibration Fine calibration performed on 7th-14th April and 8th-15th May data ( Dasha ) Ageing correction on smaller interval (Marie-Noelle)

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Calorimeter meeting 2012/ 07/25

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  1. Calorimetermeeting 2012/07/25 • Calibration & condDBstatus • O. Deschamps • LPC-Clermont-Fd 1

  2. 2012 Calibration • 2012 Ecal Calibration • Fine calibration performed on 7th-14th April and 8th-15th May data (Dasha) • Ageing correction on smaller interval (Marie-Noelle) • 23 intervals of validity from march to june TS • Slight adjustment of the γ/e reconstruction parameters (“α & β” parameters) • Performance validation on inclusive pi0s : Essentially recover 2011 performance

  3. 2012 Calibration • 2012 Ecal Calibration

  4. 2012 Calibration • 2012 Ecal Calibration • Pi0 mass trending per run • Pi0 mass trending per IOV

  5. 2012 Calibration • Online pi0 mass trending • Calorimeter standalone online reconstruction Online condDB update during TS Inner Middle ALL Outer

  6. 2012 Calibration • LED-based gain following over 14 monthes 2011 2012

  7. CondDB status • Latest LHCBCOND tag cond-20120710  contains • Ecal gain calibration up to June TS (Fine calibrations + ageing correction) • Reconstruction parametertuning • New parameters for Cluster covariance evaluation (were passed by options) • More to come • Alignmentsimilarto 2011 : likely no condDB update needed : see Philippe talk • CaloPIDreference (submitted by Dima & Victor last week) : see Victor talk • Todo • Re-evaluation of pile-up subtraction : beg. of august (?) • ImprovedPrsparametersbased on Oleg e/p method – impact to bestudied • Reprocessing deadlines from PAC (for data up to june TS)

  8. Radiative decays : first look at first 2012 data • 260 pb-1 (includingunchecked data set) • BEFORE Ecal calibration Broad & shifted signal peak

  9. Radiative decays : first look at first 2012 data • 460 pb-1 (includingunchecked data set) up to june TS • Reprocessedwith 2012 calibration M = 5365.9 MeV/c2 σ = 94.8 MeV/c2 2012 2012 M = 5277.1 MeV/c2 σ = 91.2 MeV/c2 2011 2011 M = 5280.6 MeV/c2 σ = 93.9 MeV/c2 M = 5359.9 MeV/c2 σ = 102.2 MeV/c2

  10. Radiative decays : first look at first 2012 data • 460 pb-1 (includingunchecked data set) up to june TS • Reprocessedwith 2012 calibration • 2012 signal resolution and peak position consistent with 2011 data • Selection rate (events/pb-1) • Bd→K*⁰γ : (5.3±0.2) (was 6.0±0.1 in 2011) 2012/2011 : (88±4)% • Bs→φγ : (0.80±0.05) (was 0.85±0.04 in 2011) 2012/2011 : (94±7)% • Expect ~+20% increase due to √s=7 TeV 8 TeV but L0-electron/photon • Et thresholdincreasedfrom 2.5 GeV to 2.72 GeV. • New Ecal calibration willbeapplied in reprocessing • In the meantime Calo reprocessingis possible in DV (>= v31r*) • DaVinci().CondDBtag = "cond-20120710" • DaVinci().DDDBtag = "head-20120413" • fromConfigurables import PhysConf • PhysConf().CaloReProcessing=True • + need to reprocessyourstripped candidates

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