Strong evidence for ZZ production in pp[over] collisions at sqrt[s]=1.96 TeV.
We report the first evidence of Z boson pair production at a hadron collider with a significance exceeding 4 standard deviations. This result is based on a data sample corresponding to 1.9 fb(-1) of integrated luminosity from pp[over] collisions at sqrt[s]=1.96 TeV collected with the Collider Detect...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2008
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| _version_ | 1826258853672517632 |
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| author | Aaltonen, T Adelman, J Akimoto, T Albrow, MG Alvarez González, B Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Aoki, M Apollinari, G Apresyan, A Arisawa, T Artikov, A Ashmanskas, W Attal, A Aurisano, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Badgett, W Barbaro-Galtieri, A Barnes, V |
| author_facet | Aaltonen, T Adelman, J Akimoto, T Albrow, MG Alvarez González, B Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Aoki, M Apollinari, G Apresyan, A Arisawa, T Artikov, A Ashmanskas, W Attal, A Aurisano, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Badgett, W Barbaro-Galtieri, A Barnes, V |
| author_sort | Aaltonen, T |
| collection | OXFORD |
| description | We report the first evidence of Z boson pair production at a hadron collider with a significance exceeding 4 standard deviations. This result is based on a data sample corresponding to 1.9 fb(-1) of integrated luminosity from pp[over] collisions at sqrt[s]=1.96 TeV collected with the Collider Detector at Fermilab II detector. In the lll'l' channel, we observe three ZZ candidates with an expected background of 0.096(-0.063)+0.092 events. In the llnunu channel, we use a leading-order calculation of the relative ZZ and WW event probabilities to discriminate between signal and background. In the combination of lll'l' and llnunu channels, we observe an excess of events with a probability of 5.1 x 10(-6) to be due to the expected background. This corresponds to a significance of 4.4 standard deviations. The measured cross section is sigma(pp[over]-->ZZ)=1.4(-0.6)+0.7(stat+syst) pb, consistent with the standard model expectation. |
| first_indexed | 2024-03-06T18:40:34Z |
| format | Journal article |
| id | oxford-uuid:0cbade3f-f663-40e6-8a1f-0d28a7874383 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:40:34Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:0cbade3f-f663-40e6-8a1f-0d28a78743832022-03-26T09:36:34ZStrong evidence for ZZ production in pp[over] collisions at sqrt[s]=1.96 TeV.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0cbade3f-f663-40e6-8a1f-0d28a7874383EnglishSymplectic Elements at Oxford2008Aaltonen, TAdelman, JAkimoto, TAlbrow, MGAlvarez González, BAmerio, SAmidei, DAnastassov, AAnnovi, AAntos, JAoki, MApollinari, GApresyan, AArisawa, TArtikov, AAshmanskas, WAttal, AAurisano, AAzfar, FAzzi-Bacchetta, PAzzurri, PBacchetta, NBadgett, WBarbaro-Galtieri, ABarnes, VWe report the first evidence of Z boson pair production at a hadron collider with a significance exceeding 4 standard deviations. This result is based on a data sample corresponding to 1.9 fb(-1) of integrated luminosity from pp[over] collisions at sqrt[s]=1.96 TeV collected with the Collider Detector at Fermilab II detector. In the lll'l' channel, we observe three ZZ candidates with an expected background of 0.096(-0.063)+0.092 events. In the llnunu channel, we use a leading-order calculation of the relative ZZ and WW event probabilities to discriminate between signal and background. In the combination of lll'l' and llnunu channels, we observe an excess of events with a probability of 5.1 x 10(-6) to be due to the expected background. This corresponds to a significance of 4.4 standard deviations. The measured cross section is sigma(pp[over]-->ZZ)=1.4(-0.6)+0.7(stat+syst) pb, consistent with the standard model expectation. |
| spellingShingle | Aaltonen, T Adelman, J Akimoto, T Albrow, MG Alvarez González, B Amerio, S Amidei, D Anastassov, A Annovi, A Antos, J Aoki, M Apollinari, G Apresyan, A Arisawa, T Artikov, A Ashmanskas, W Attal, A Aurisano, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Badgett, W Barbaro-Galtieri, A Barnes, V Strong evidence for ZZ production in pp[over] collisions at sqrt[s]=1.96 TeV. |
| title | Strong evidence for ZZ production in pp[over] collisions at sqrt[s]=1.96 TeV. |
| title_full | Strong evidence for ZZ production in pp[over] collisions at sqrt[s]=1.96 TeV. |
| title_fullStr | Strong evidence for ZZ production in pp[over] collisions at sqrt[s]=1.96 TeV. |
| title_full_unstemmed | Strong evidence for ZZ production in pp[over] collisions at sqrt[s]=1.96 TeV. |
| title_short | Strong evidence for ZZ production in pp[over] collisions at sqrt[s]=1.96 TeV. |
| title_sort | strong evidence for zz production in pp over collisions at sqrt s 1 96 tev |
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