Measurement of the differential $\mathrm{t\bar{t}}$ cross section with high-$p_\mathrm{T}$ top-quark jets in the all-hadronic channel at $\sqrt{s}=8~\mathrm{TeV}$ - INSPIRE

Measurement of the differential $\mathrm{t\bar{t}}$ cross section with high- $p_\mathrm{T}$ top-quark jets in the all-hadronic channel at $\sqrt{s}=8~\mathrm{TeV}$

CMS

Collaboration

2017

18 pages

Report number:

CMS-PAS-TOP-16-018

Experiments:

CERN-LHC-CMS

View in:

CERN Document Server

reference search4 citations

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Abstract:

A measurement of the differential

\mathrm{t\bar{t}}

production cross section using

19.7~\mathrm{fb}^{-1}

of all-jet events with high-

p_\mathrm{T}

top-quark jets collected by the CMS detector at

\sqrt{s} = 8~\mathrm{TeV}

is presented. This measurement focuses on events where both top quarks decay hadronically, giving rise to a dijet topology. Techniques based on jet substructure are used to suppress standard model backgrounds dominated by QCD multijet production. The remaining background is estimated from data. The

\mathrm{t\bar{t}}

event yield is extracted in bins of the measured leading top-quark

p_\mathrm{T}

using a likelihood fit of the invariant mass distribution of top-quark jet candidates. After correcting to parton level, the measured cross section as a function of the leading top-quark

p_\mathrm{T}

is found to be in agreement with the NLO calculations.

Note:

Preliminary results

Data
p p: scattering
p p: colliding beams
jet: transverse momentum
top: pair production
top: mass spectrum
top: hadronic decay
differential cross section: measured
transverse momentum dependence
background

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