Aaltonen, T;
Gonzalez, BA;
Amerio, S;
Amidei, D;
Anastassov, A;
Annovi, A;
Antos, J;
... CDF Collaboration; + view all
(2011)
Limits on Anomalous Trilinear Gauge Couplings in Z gamma Events from p(p)over-bar Collisions at root s=1.96 TeV.
Physical Review Letters
, 107
(5)
, Article 051802. 10.1103/PhysRevLett.107.051802.
![[thumbnail of 1318900.pdf]](https://discovery-pp.ucl.ac.uk/style/images/fileicons/text.png) Preview |
Text
1318900.pdf Download (193kB) |
Abstract
Using Z gamma candidate events collected by the CDF detector at the Tevatron Collider, we search for potential anomalous (non-standard-model) couplings between the Z boson and the photon. Z gamma couplings vanish at tree level and are heavily suppressed at higher orders; hence any evidence of couplings indicates new physics. Measurements are performed using data corresponding to an integrated luminosity of 4.9 fb(-1) in the Z -> nu(nu) over bar decay channel and 5: 1 fb(-1) in the Z -> l(+)l(-) (l - mu, e) decay channels. The combination of these measurements provides the most stringent limits to date on Z gamma trilinear gauge couplings. Using an energy scale of Lambda = 1.5 TeV to allow for a direct comparison with previous measurements, we find limits on the CP-conserving parameters that describe Z gamma couplings to be vertical bar h(3)(gamma,Z)vertical bar < 0.022 and vertical bar h(4)(gamma,Z)vertical bar < 0.0009. These results are consistent with standard model predictions.
| Type: | Article |
|---|---|
| Title: | Limits on Anomalous Trilinear Gauge Couplings in Z gamma Events from p(p)over-bar Collisions at root s=1.96 TeV |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.107.051802 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.107.051802 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | TEVATRON COLLIDER, HADRON COLLIDERS, BOSON |
| 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-pp.ucl.ac.uk/id/eprint/1318900 |
Archive Staff Only
 |
View Item |
