IFAE-Barcelona
Authors
Stefano Camarda (camarda@fnal.gov)
Sebastian Grinstein (gris@fnal.gov)
Mario Martínez (mmp@fnal.gov)
Lorenzo Ortolan (loreorto@ifae.es)
Veronica Sorin (vsorin@fnal.gov)
P.0. Box 500
Batavia, Illinois 60510
USA
(7.86 fb-1 analysis)
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The b jet production cross section is measured for events with a Z boson (decaying leptonically) in 7.86 fb-1 of data. Events are selected by requiring two high pTjet electrons or muons and high pTjet central jets, among which jets are further required to be b-tagged. Results of the ratio of the Z+b - jet cross section with respect to Z and Z+jets cross sections are compared with predictions from ALPGEN and NLO QCD (MCFM).
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- NZbjet: the number of b-jets in events with Z
- NZ: the number of events with a Z boson
- AMCZ: the acceptance for Z events evaluated in MC
- AMCZbjet: the Z+b-jet acceptance evaluated in MC
- Blessed Results with 7.86 fb-1
- Electrons:
- Two electrons with ET > 25 GeV
- At least one central electron , |ηe| < 1.0
- Second electron central or forward , |ηe| < 1.0 or 1.2 < |ηe| < 2.8
- Muons:
- Two muons with ET > 20 GeV
- At least one central muon ;
- cuts on ANNs output;
- Z mass window: 66 < Mll < 116 GeV/c2
- ΔR(l,jet) > 0.7
- Significance in function of ANNs output .jpg .eps
- Data - Monte Carlo comparison for Z Mass in muon channel .jpg .eps
- Data - Monte Carlo comparison for Z Mass in electron channel .jpg .eps
- Table of Acceptances .tex
- Sample composition: Backgrounds contributions .tex
- Table of observed events .tex
- SecVtx Mass Template .jpg .eps
- Result of the fit .jpg .eps
- Transverse Momentum Distribution of the tagged jets .jpg .eps
- Rapidity Distribution of the tagged jets .jpg .eps
- systematic table .tex
- Differential cross section as function of jet transverse momentum .jpg .eps
- Diffential cross section as function of jet rapidity .jpg .eps
- b jet fraction as function of jet transverse momentum .jpg .eps
- b jet fraction as function of jet rapidity .jpg .eps
- Unfolding as funcyion of jet transverse momentum .jpg .eps
- Unfolding as function of jet rapidity .jpg .eps
The measurement with respect to the Z inclusive cross section is defined as:
where:
The measurements are performed for events with a Z boson decaying leptonically either to electrons or muons. The event selection is defined by:
Measurements are defined for hadron level jets with pTjet > 20 GeV/c and |yjet| < 1.5.
Jets are further required to be tagged with Tight SecVtx Tagged
Blessed Plots and Tables:
Results:
Tex Table: .tex
Differential Distributions:
