Abazov, VM;
Abbott, B;
Acharya, BS;
Adams, M;
Adams, T;
Alexeev, GD;
Alkhazov, G;
... Collaboration, D; + view all
(2012)
Measurement of angular correlations of jets at root s=1.96 TeV and determination of the strong coupling at high momentum transfers.
PHYSICS LETTERS B
, 718
(1)
56 - 63.
10.1016/j.physletb.2012.10.003.
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Abstract
We present a measurement of the average value of a new observable at hadron colliders that is sensitive to QCD dynamics and to the strong coupling constant, while being only weakly sensitive to parton distribution functions. The observable measures the angular correlations of jets and is defined as the number of neighboring jets above a given transverse momentum threshold which accompany a given jet within a given distance �R in the plane of rapidity and azimuthal angle. The ensemble average over all jets in an inclusive jet sample is measured and the results are presented as a function of transverse momentum of the inclusive jets, in different regions of �R and for different transverse momentum requirements for the neighboring jets. The measurement is based on a data set corresponding to an integrated luminosity of 0.7 fb−1 collected with the D0 detector at the Fermilab Tevatron Collider in p¯p collisions at √ s = 1.96 TeV. The results are well described by a perturbative QCD calculation in next-toleading order in the strong coupling constant, corrected for non-perturbative effects. From these results, we extract the strong coupling and test the QCD predictions for its running over a range of momentum transfers of 50–400 GeV.
| Type: | Article |
|---|---|
| Title: | Measurement of angular correlations of jets at root s=1.96 TeV and determination of the strong coupling at high momentum transfers |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.physletb.2012.10.003 |
| Publisher version: | http://dx.doi.org/10.1016/j.physletb.2012.10.003 |
| Additional information: | This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1373965 |
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