# Fraction of ${{\boldsymbol t}}{{\overline{\boldsymbol t}}}$ + multi-jet Events in ${{\boldsymbol p}}{{\boldsymbol p}}$ Collisions at $\sqrt {s }$ = 7 TeV INSPIRE search

VALUE DOCUMENT ID TECN  COMMENT
• • • We do not use the following data for averages, fits, limits, etc. • • •
1
 2015 D
ATLS ${{\mathit \ell}}+\not E_T$ + nj (n=3 to 8)
$0.332$ $\pm0.090$ 2
 2014 AE
CMS ${{\mathit t}}{{\overline{\mathit t}}}$ ( ${{\mathit \ell}}{{\mathit \ell}}$ ) + 0 jet ($\mathit E_{T}>$ 30GeV)
$0.436$ $\pm0.098$ 2
 2014 AE
CMS ${{\mathit t}}{{\overline{\mathit t}}}$ ( ${{\mathit \ell}}{{\mathit \ell}}$ ) + 1 jet ($\mathit E_{T}>$ 30GeV)
$0.232$ $\pm0.125$ 2
 2014 AE
CMS ${{\mathit t}}{{\overline{\mathit t}}}$ ( ${{\mathit \ell}}{{\mathit \ell}}$ ) + ${}\geq{}$2 jet ($\mathit E_{T}>$ 30GeV)
1  Based on 4.6 fb${}^{-1}$ of data. Fiducial ${{\mathit t}}{{\overline{\mathit t}}}$ production cross section is presented as a function of the jet multiplicity for up to eight jets with the jet ${{\mathit p}_{{T}}}$ threshold of 25, 40, 60, and 80 GeV, and as a function of jet ${{\mathit p}_{{T}}}$ up to the 5th jet. MC models can be discriminated by using data for high jet multiplicity and by ${{\mathit p}_{{T}}}$ distributions of the leading and 5th jet.
2  Based on 5.0 fb${}^{-1}$ of data. Events with two oppositely charged leptons, large $\not E_T$ and jets with at least 1 ${{\mathit b}}$-tag are used to measure the fraction of ${{\mathit t}}{{\overline{\mathit t}}}$ plus additional jets. The gap fraction (n=0 jet rate) as a function of the jet ${{\mathit p}_{{T}}}$ and that of ${{\mathit H}_{{T}}}$, the scalar sum of the ${{\mathit p}_{{T}}}$'s of additional jets, is shown in Fig. 8.
References:
JHEP 1501 020 Measurement of the ${\mathit {\mathit t}}{\mathit {\overline{\mathit t}}}$ Production Cross-Section as a Function of Jet Multiplicity and Jet Transverse Momentum in 7 TeV Proton-Proton Collisions with the ATLAS Detector
EPJ C74 3014 Measurement of Jet Multiplicity Distributions in ${\mathit {\mathit t}}{\mathit {\overline{\mathit t}}}$ Production in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 7 TeV