Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector
A search is reported for the pair production of a new quark b′ with at least one b′ decaying to a Z boson and a bottom quark. The data, corresponding to 2.0 fb[superscript -1] of integrated luminosity, were collected from pp collisions at √s=7 TeV with the ATLAS detector at the CERN Large Hadron C...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/74645 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1826205692529213440 |
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| author | Taylor, Frank E. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. |
| author_sort | Taylor, Frank E. |
| collection | MIT |
| description | A search is reported for the pair production of a new quark b′ with at least one b′ decaying to a Z boson and a bottom quark. The data, corresponding to 2.0 fb[superscript -1] of integrated luminosity, were collected from pp collisions at √s=7 TeV with the ATLAS detector at the CERN Large Hadron Collider. Using events with a b-tagged jet and a Z boson reconstructed from opposite-charge electrons, the mass distribution of large transverse momentum b′ candidates is tested for an enhancement. No evidence for a b′ signal is detected in the observed mass distribution, resulting in the exclusion at a 95% confidence level of b′ quarks with masses m[subscript b′]<400 GeV that decay entirely via b′→Z+b. In the case of a vectorlike singlet b′ mixing solely with the third standard model generation, masses m[subscript b′]<358 GeV are excluded. |
| first_indexed | 2024-09-23T13:17:25Z |
| format | Article |
| id | mit-1721.1/74645 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:17:25Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/746452022-10-01T14:17:50Z Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector Taylor, Frank E. Massachusetts Institute of Technology. Department of Physics Taylor, Frank E. A search is reported for the pair production of a new quark b′ with at least one b′ decaying to a Z boson and a bottom quark. The data, corresponding to 2.0 fb[superscript -1] of integrated luminosity, were collected from pp collisions at √s=7 TeV with the ATLAS detector at the CERN Large Hadron Collider. Using events with a b-tagged jet and a Z boson reconstructed from opposite-charge electrons, the mass distribution of large transverse momentum b′ candidates is tested for an enhancement. No evidence for a b′ signal is detected in the observed mass distribution, resulting in the exclusion at a 95% confidence level of b′ quarks with masses m[subscript b′]<400 GeV that decay entirely via b′→Z+b. In the case of a vectorlike singlet b′ mixing solely with the third standard model generation, masses m[subscript b′]<358 GeV are excluded. 2012-11-14T18:24:28Z 2012-11-14T18:24:28Z 2012-08 2012-04 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/74645 G. Aad et al. “Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector.” Physical Review Letters 109.7 (2012). https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1103/PhysRevLett.109.071801 Physical Review Letters Creative Commons Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ application/pdf American Physical Society APS |
| spellingShingle | Taylor, Frank E. Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector |
| title | Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector |
| title_full | Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector |
| title_fullStr | Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector |
| title_full_unstemmed | Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector |
| title_short | Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector |
| title_sort | search for pair production of a new b quark that decays into a z boson and a bottom quark with the atlas detector |
| url | http://hdl.handle.net/1721.1/74645 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke searchforpairproductionofanewbquarkthatdecaysintoazbosonandabottomquarkwiththeatlasdetector |