Measurement of dijet azimuthal decorrelations in pp collisions at √s = 8 TeV with the ATLAS detector and determination of the strong coupling

Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Measurement of dijet azimuthal decorrelations in pp collisions at √s = 8 TeV with the ATLAS detector and determination of the strong coupling. Physical review. D - particles, fields, gravitation, and cosmology, 98(9) American Physical Society 10.1103/PhysRevD.98.092004

[img]
Preview
Text
PhysRevD.98.092004.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (624kB) | Preview

A measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations is presented, using the quantity RΔφ. The quantity RΔφ specifies the fraction of the inclusive dijet events in which the azimuthal opening angle of the two jets with the highest transverse momenta is less than a given value of the parameter Δφmax. The quantity RΔφ is measured in proton-proton collisions √s = 8 TeV as a function of the dijet rapidity interval, the event total scalar transverse momentum, and Δφmax. The measurement uses an event sample corresponding to an integrated luminosity of 20.2fb⁻¹ collected with the ATLAS detector at the CERN Large Hadron Collider. Predictions of a perturbative QCD calculation at next-to-leading order in the strong coupling with corrections for nonperturbative effects are compared to the data. The theoretical predictions describe the data in the whole kinematic region. The data are used to determine the strong coupling αS and to study its running for momentum transfers from 260 GeV to above 1.6 TeV. Analysis that combines data at all momentum transfers results in αS (mZ) = 0.1127 +0.0063 −0.0027.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics

ISSN:

1550-7998

Publisher:

American Physical Society

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

25 Jun 2019 10:12

Last Modified:

23 Oct 2019 14:35

Publisher DOI:

10.1103/PhysRevD.98.092004

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt

BORIS DOI:

10.7892/boris.129048

URI:

https://boris.unibe.ch/id/eprint/129048

Actions (login required)

Edit item Edit item
Provide Feedback