Measurement of Z gamma Production in pbar{p} Collisions at sqrt{s} = 1.96 TeV

Journal Article · Thu Apr 01 04:00:00 EDT 2010 · Submitted to Phys.Rev.D

DOI:https://doi.org/10.1103/PhysRevD.82.031103· OSTI ID:978375

Aaltonen, T; Adelman, J; Alvarez Gonzalez, B; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Appel, J; Apresyan, A

The production rate and kinematics of photons produced in association with Z bosons are studied using 2 fb{sup -1} of p{bar p} collision data collected at the Collider Detector at Fermilab. The cross section for p{bar p} {yields} {ell}{sup +}{ell}{sup -}{gamma} + X (where the leptons {ell} are either muons or electrons with dilepton mass M{sub {ell}{ell}} > 40 GeV/c{sup 2}, and where the photon has transverse energy E{sub T}{sup {gamma}} > 7 GeV and is well separated from the leptons) is 4.6 {+-} 0.2 (stat) {+-} 0.3 (syst) {+-} 0.3 (lum) pb, which is consistent with standard model expectations. We use the photon ET distribution from Z{gamma} events where the Z has decayed to {mu}{sup +}{mu}{sup -}, e{sup +}e{sup -}, or {nu}{bar {nu}} to set limits on anomalous (non-standard-model) trilinear couplings between photons and Z bosons.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 978375
• Report Number(s): FERMILAB-PUB-10-073-E; arXiv eprint number arXiv:1004.1140
• Journal Information: Submitted to Phys.Rev.D, Journal Name: Submitted to Phys.Rev.D Journal Issue: 3 Vol. 82; ISSN 1550-7998
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CROSS SECTIONS
DISTRIBUTION
ELECTRONS
Experiment-HEP
FERMILAB COLLIDER DETECTOR
LEPTONS
MUONS
PHOTONS
PRODUCTION
STANDARD MODEL
TRANSVERSE ENERGY