Published January 1, 2018 | Version v1
Journal article Open

Combination of inclusive and differential t(t)over-bar charge asymmetry measurements using ATLAS and CMS data at root S=7 and 8 TeV

Creators

  • 1. Univ Oklahoma, Homer L Dodge Dept Phys & Astron, Norman, OK 73019 USA
  • 2. Azerbaijan Acad Sci, Inst Phys, Baku, Azerbaijan
  • 3. Univ Paris Saclay, CNRS IN2P3, LAL, Univ Paris Sud, Orsay, France
  • 4. Univ Toronto, Dept Phys, Toronto, ON, Canada
  • 5. Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
  • 6. Univ Sussex, Dept Phys & Astron, Brighton, E Sussex, England
  • 7. Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, Tel Aviv, Israel
  • 8. Technion Israel Inst Technol, Dept Phys, Haifa, Israel
  • 9. AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland
  • 10. Northern Illinois Univ, Dept Phys, De Kalb, IL USA
  • 11. Ludwig Maximilians Univ Munchen, Fak Phys, Munich, Germany
  • 12. Rutherford Appleton Lab, Particle Phys Dept, Didcot, Oxon, England
  • 13. Alexandra Ioan Cuza Univ Iasi, Dept Phys, Iasi, Romania

Description

This paper presents combinations of inclusive and differential measurements of the charge asymmetry (A(C)) in top quark pair (t(t)over-bar) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. The data correspond to integrated luminosities of about 5 and 20 fb(-1) for each experiment, respectively. The resulting combined LHC measurements of the inclusive charge asymmetry are A(C)(LHC7) = 0.005 +/- 0.007 (stat) +/- 0.006 (syst) at 7 TeV and A(C)(LHC8) = 0.0055 +/- 0.0023 (stat) +/- 0.0025 (syst) at 8 TeV. These values, as well as the combination of A(C) measurements as a function of the invariant mass of the t(t)over-bar system at 8 TeV, are consistent with the respective standard model predictions.

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