# King's College London

## Measurement of the $t\bar{t}$ production cross section in the $τ$ + jets final state in $pp$ collisions at $\sqrt{s}=8$ TeV using the ATLAS detector

Research output: Contribution to journalArticlepeer-review

Original language Undefined/Unknown Physical Review D (Particles, Fields, Gravitation and Cosmology) https://doi.org/10.1103/PhysRevD.95.072003 28 Feb 2017

## Bibliographical note

37 pages in total, author list starts at page 21, 2 figures, 6 tables, published version, all figures and tables including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-18/

### Documents

• 1702.08839v2.pdf, 519 KB, application/pdf

A measurement of the inclusive $pp\to t\bar{t}+X$ production cross section in the $\tau+{\rm jets}$ final state using only the hadronic decays of the $\tau$ lepton is presented. The measurement is performed using 20.2 fb$^{-1}$ of proton-proton collision data recorded at a center-of-mass energy of $\sqrt{s}=8$ TeV with the ATLAS detector at the Large Hadron Collider. The cross section is measured via a counting experiment by imposing a set of selection criteria on the identification and kinematic variables of the reconstructed particles and jets, and on event kinematic variables and characteristics. The production cross section is measured to be $\sigma_{t\bar{t}}= 239 \pm 29$ pb, which is in agreement with the measurements in other final states and the theoretical predictions at this center-of-mass energy.