Abstract
A measurement of the dijet production cross section is reported based on proton–proton collision data collected in 2016 at
$$\sqrt{s}=13\,\text {Te}\hspace{-.08em}\text {V} $$
s
=
13
Te
V
by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of up to 36.3
$$\,\text {fb}^{-1}$$
fb
-
1
. Jets are reconstructed with the anti-
$$k_{\textrm{T}} $$
k
T
algorithm for distance parameters of
$$R=0.4$$
R
=
0.4
and 0.8. Cross sections are measured double-differentially (2D) as a function of the largest absolute rapidity
$$|y |_{\text {max}} $$
|
y
|
max
of the two jets with the highest transverse momenta
$$p_{\textrm{T}}$$
p
T
and their invariant mass
$$m_{1,2} $$
m
1
,
2
, and triple-differentially (3D) as a function of the rapidity separation
$$y^{*} $$
y
∗
, the total boost
$$y_{\text {b}} $$
y
b
, and either
$$m_{1,2} $$
m
1
,
2
or the average
$$p_{\textrm{T}}$$
p
T
of the two jets. The cross sections are unfolded to correct for detector effects and are compared with fixed-order calculations derived at next-to-next-to-leading order in perturbative quantum chromodynamics. The impact of the measurements on the parton distribution functions and the strong coupling constant at the mass of the
$${\text {Z}} $$
Z
boson is investigated, yielding a value of
$$\alpha _\textrm{S} (m_{{\text {Z}}}) =0.1179\pm 0.0019$$
α
S
(
m
Z
)
=
0.1179
±
0.0019
.
