Measurement of Triple-Differential Dijet Cross Sections at $\sqrt{s}=8\,$TeV with the CMS Detector and Constraints on Parton Distribution Functions

of data collected with the CMS detector in proton-proton collisions at the LHC. The cross sections are measured as a function of the average transverse momentum, half the rapidity separation, and the boost of the two leading jets. The cross sections are unfolded for detector effects and compared to calculations in perturbative quantum chromodynamics at next-to-leading order accuracy complemented with electroweak and nonperturbative corrections. Constraints on the parton distribution functions are derived and the strong coupling constant is determined to be

\alpha_s(M_Z) = 0.1199\,\pm{0.0015}\,(\mathrm{exp})\, _{-0.0020}^{+0.0031}\,(\mathrm{theo})

.

Note:

Preliminary results

Data
p p: colliding beams
parton: distribution function
correction: nonperturbative
strong interaction: coupling constant
p p: scattering
higher-order: 1
dijet
boosted particle
CMS

References(63)

Figures(40)

[1]

Observation of Very Large Transverse Momentum Jets at the CERN anti-p p Collider

UA2

Collaboration

•

M. Banner
(
- IRFU, Saclay
)

et al.

- Phys.Lett.B 118 (1982) 203-210,
- In *Cahn, R.N., Goldhaber, G.: The experimental foundations of particle physics* 329-336
•
DOI:
- 10.1016/0370-2693(82)90629-3

[2]

DIJET PRODUCTION CROSS-SECTION AND FRAGMENTATION OF JETS PRODUCED IN P P COLLISIONS AT S**(1/2) = 63-GEV

AXIAL FIELD SPECTROMETER

Collaboration

•

T. Åkesson
(
- CERN
)

et al.

- Z.Phys.C 30 (1986) 27-43,
- CERN Geneva - CERN-EP 85-164 (85,REC.OCT.) 40p,
- Z. Phys. C30 ( 1986) 27-43 and CERN Geneva - CERN-EP 85-164 (85,REC.OCT.) 40p
•
DOI:
- 10.1007/BF01560675

[3]

A measurement of the differential dijet mass cross section in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

T. Affolder
(
- LBL, Berkeley
)

et al.

- Phys.Rev.D 61 (2000) 091101
•
e-Print:
- hep-ex/9912022
•
DOI:
- 10.1103/PhysRevD.61.091101

[4]

Measurement of the dijet mass distribution in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- KEK, Tsukuba
)

et al.

- Phys.Rev.D 48 (1993) 998-1008
•
DOI:
- 10.1103/PhysRevD.48.998

[5]

The Two jet invariant mass distribution at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe
(
- Tsukuba U.
)

et al.

- Phys.Rev.D 41 (1990) 1722-1725
•
DOI:
- 10.1103/PhysRevD.41.1722

[6]

The dijet mass spectrum and a search for quark compositeness in $\bar{p}p$ collisions at $\sqrt{s} = 1.8$ TeV

D0

Collaboration

•

B. Abbott

et al.

- Phys.Rev.Lett. 82 (1999) 2457-2462
•
e-Print:
- hep-ex/9807014
•
DOI:
- 10.1103/PhysRevLett.82.2457

[7]

Measurement of Inclusive Jet and Dijet Cross Sections in Proton-Proton Collisions at 7 TeV Centre-of-Mass Energy with the ATLAS Detector

ATLAS

Collaboration

•

G. Aad
(
- Freiburg U.
)

et al.

- Eur.Phys.J.C 71 (2011) 1512
•
e-Print:
- 1009.5908
•
DOI:
- 10.1140/epjc/s10052-010-1512-2

[8]

Measurement of the differential dijet production cross section in proton-proton collisions at $\sqrt{s}=7$ TeV

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Lett.B 700 (2011) 187-206
•
e-Print:
- 1104.1693
•
DOI:
- 10.1016/j.physletb.2011.05.027

[9]

Measurement of inclusive jet and dijet production in $pp$ collisions at $\sqrt{s}=7$ TeV using the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- Phys.Rev.D 86 (2012) 014022
•
e-Print:
- 1112.6297
•
DOI:
- 10.1103/PhysRevD.86.014022

[10]

Measurement of dijet cross sections in $pp$ collisions at 7 TeV centre-of-mass energy using the ATLAS detector

ATLAS

Collaboration

•

Georges Aad
(
- Freiburg U.
)

et al.

- JHEP 05 (2014) 059
•
e-Print:
- 1312.3524
•
DOI:
- 10.1007/JHEP05(2014)059

[11]

Measurements of Differential Jet Cross Sections in Proton-Proton Collisions at $\sqrt{s}=7$ TeV with the CMS Detector

CMS

Collaboration

•

Serguei Chatrchyan
(
- Yerevan Phys. Inst.
)

et al.

- Phys.Rev.D 87 (2013) 11, 112002,
- Phys.Rev.D 87 (2013) 11, 119902 (erratum)
•
e-Print:
- 1212.6660
•
DOI:
- 10.1103/PhysRevD.87.112002

[12]

Two Jet Differential Cross Section in $\bar{p}p$ Collisions at $\sqrt{s} = 1.8$ TeV

CDF

Collaboration

•

F. Abe

et al.

- Phys.Rev.Lett. 64 (1990) 157,
- Phys. Rev. Lett. 64 (1990) 157-160 and Fermilab Batavia - FERMILAB-Pub-89-206 (89,rec.Dec.) 11 p
•
DOI:
- 10.1103/PhysRevLett.64.157