الفهرس 
Theoretical MotivationOnly 14 pages are availabe for public view
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Abstract
A study of inclusive trijet production in proton-proton collisions at √
s = 13 TeV is presented.
The data samples were collected with the CMS detector at the LHC during a low intensity
run in the year 2016, with an integrated luminosity of 0.042 pb−1
. Measurements of the
differential cross sections as a function of the jet transverse momentum pT , pseudorapidity
η, and two azimuthal decorrelation observables with two different scenarios are presented.
Detector resolutions, migration matrices, fake rates, and miss rates are presented as well.
For ∆φdijet observable the scenario is: jets with a minimal pT = 20 GeV are selected, with an
additional requirement that the leading jet pT > 35 GeV, and a configuration which requires
the pseudorapidity of one jet to be in the central region defined by |ηc| < 2.0, and the two
other jets are required to be present in a more forward pseudorapidity region defined by
|ηf1,f2| > 2.0, and lie in the same pseudorapidity hemisphere, i.e. (ηf1 . ηf2 > 0). For φ13
observable the scenario is: jets with a minimal pT = 35 GeV are selected, with an additional
requirement that the leading jet pT > the subleading jet pT > the third jet pT > 35 GeV,
and a configuration where the leading and subleading jets are present in the pseudorapidity
region defined by |η1,2| < 2.8, and the third jet is required to be present in a more forward
area defined by 3.2 < |η3| < 4.7. These low pT cuts on jets in combination with that wide
range of η cuts allow for the low-x regime to be probed.