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R45 = -1

R45 = -1. Artur Apresyan California Institute of Technology Saeid Paktinat School of Particles and accelerators, IPM. Introduction. R45 = (T4 – T5)/(T4 + T5) Noise is characterized as a function of R45 and energy (T4 + T5). There are plenty of events in MET PD with R45 = -1 ?!

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R45 = -1

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  1. R45 = -1 ArturApresyan California Institute of Technology SaeidPaktinat School of Particles and accelerators, IPM

  2. Introduction • R45 = (T4 – T5)/(T4 + T5) • Noise is characterized as a function of R45 and energy (T4 + T5). • There are plenty of events in MET PD with R45 = -1 ?! • /MET/Run2011B-PromptReco-v1/RECO • Different features of these events are studied. S. Paktinat

  3. Tagging rate from R45 lower envelope is 10 times of that for the upper envelope. S. Paktinat

  4. R45 = -1 population The main part of the noisy RBX’s have R45 ~ -1. S. Paktinat

  5. It can happen every where and any time, although the low pile up is preferred. nVtx Run Number RBX’s S. Paktinat

  6. MET and Charge have the same distribution as other noisy RBX’s. In events with MET > 100, MET is always back to back with the noisy RBX. S. Paktinat

  7. RBX Energy Fraction and Jets EMF confirms R45 = -1 is really a noise, but why so often? S. Paktinat

  8. Back up S. Paktinat

  9. EMF All Noises S. Paktinat

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