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

INSPIRE   PDGID:
Q007TJ7
VALUE DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
1
AAD
2015D
 ATLS ${{\mathit \ell}}+\not E_T$ + nj (n=3 to 8)
$0.332$ $\pm0.090$ 2
CHATRCHYAN
2014AE
 CMS ${{\mathit t}}{{\overline{\mathit t}}}({{\mathit \ell}}{{\mathit \ell}}$) + 0 jet ($\mathit E_{T}>$ 30GeV)
$0.436$ $\pm0.098$ 2
CHATRCHYAN
2014AE
 CMS ${{\mathit t}}{{\overline{\mathit t}}}({{\mathit \ell}}{{\mathit \ell}}$) + 1 jet ($\mathit E_{T}>$ 30GeV)
$0.232$ $\pm0.125$ 2
CHATRCHYAN
2014AE
 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