Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp̅ Collisions at √s=1.96 TeV
Using Zγ 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. Zγ couplings vanish at tree level and are heavily suppressed at higher orders; hence any evidence of couplings indica...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2011
|
| Online Access: | http://hdl.handle.net/1721.1/66983 https://orcid.org/0000-0002-6047-4211 |
| _version_ | 1811095140883759104 |
|---|---|
| author | Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Bauer, Gerry P Makhoul, Khaldoun |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Bauer, Gerry P Makhoul, Khaldoun |
| author_sort | Gomez-Ceballos, Guillelmo |
| collection | MIT |
| description | Using Zγ 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. Zγ 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[superscript -1] in the Z→νν̅ decay channel and 5.1 fb[superscript -1] in the Z→l[superscript +]l[superscript -] (l=μ, e) decay channels. The combination of these measurements provides the most stringent limits to date on Zγ trilinear gauge couplings. Using an energy scale of Λ=1.5 TeV to allow for a direct comparison with previous measurements, we find limits on the CP-conserving parameters that describe Zγ couplings to be |h[subscript 3][superscript γ,Z]|<0.022 and |h[subscript 4][superscript γ,Z]|<0.0009. These results are consistent with standard model predictions. |
| first_indexed | 2024-09-23T16:11:18Z |
| format | Article |
| id | mit-1721.1/66983 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:11:18Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/669832023-02-26T05:42:32Z Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp̅ Collisions at √s=1.96 TeV Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Bauer, Gerry P Makhoul, Khaldoun Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Paus, Christoph M. E. Bauer, Gerry P. Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, K. Paus, Christoph M. E. Using Zγ 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. Zγ 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[superscript -1] in the Z→νν̅ decay channel and 5.1 fb[superscript -1] in the Z→l[superscript +]l[superscript -] (l=μ, e) decay channels. The combination of these measurements provides the most stringent limits to date on Zγ trilinear gauge couplings. Using an energy scale of Λ=1.5 TeV to allow for a direct comparison with previous measurements, we find limits on the CP-conserving parameters that describe Zγ couplings to be |h[subscript 3][superscript γ,Z]|<0.022 and |h[subscript 4][superscript γ,Z]|<0.0009. These results are consistent with standard model predictions. United States. Dept. of Energy National Science Foundation (U.S.) Alfred P. Sloan Foundation 2011-11-09T21:08:07Z 2011-11-09T21:08:07Z 2011-07 2011-03 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/66983 Aaltonen, T. et al. “Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp[over ¯] Collisions at sqrt[s]=1.96 TeV.” Physical Review Letters 107 (2011): n. pag. Web. 9 Nov. 2011. © 2011 American Physical Society https://orcid.org/0000-0002-6047-4211 en_US http://dx.doi.org/10.1103/PhysRevLett.107.051802 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Bauer, Gerry P Makhoul, Khaldoun Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp̅ Collisions at √s=1.96 TeV |
| title | Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp̅ Collisions at √s=1.96 TeV |
| title_full | Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp̅ Collisions at √s=1.96 TeV |
| title_fullStr | Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp̅ Collisions at √s=1.96 TeV |
| title_full_unstemmed | Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp̅ Collisions at √s=1.96 TeV |
| title_short | Limits on Anomalous Trilinear Gauge Couplings in Zγ Events from pp̅ Collisions at √s=1.96 TeV |
| title_sort | limits on anomalous trilinear gauge couplings in zγ events from pp collisions at √s 1 96 tev |
| url | http://hdl.handle.net/1721.1/66983 https://orcid.org/0000-0002-6047-4211 |
| work_keys_str_mv | AT gomezceballosguillelmo limitsonanomaloustrilineargaugecouplingsinzgeventsfromppcollisionsats196tev AT goncharovmaxim limitsonanomaloustrilineargaugecouplingsinzgeventsfromppcollisionsats196tev AT pauschristophme limitsonanomaloustrilineargaugecouplingsinzgeventsfromppcollisionsats196tev AT bauergerryp limitsonanomaloustrilineargaugecouplingsinzgeventsfromppcollisionsats196tev AT makhoulkhaldoun limitsonanomaloustrilineargaugecouplingsinzgeventsfromppcollisionsats196tev |