Searches for anomalous tqZ couplings from the trilepton signal of tZ associated production at the 14 TeV LHC
We investigate the observability of the top anomalous tqZ couplings via the trilepton signatures at the Large Hadron Collider (LHC) with the center-of-mass energy of 14 TeV. We focus on signals of the tZ associated production with the decay mode t→W+b→bℓ+νℓ, Z→ℓ+ℓ−, and tt¯ production with the decay...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317309474 |
| _version_ | 1818246328890687488 |
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| author | Jie-Fen Shen Yu-Qi Li Yao-Bei Liu |
| author_facet | Jie-Fen Shen Yu-Qi Li Yao-Bei Liu |
| author_sort | Jie-Fen Shen |
| collection | DOAJ |
| description | We investigate the observability of the top anomalous tqZ couplings via the trilepton signatures at the Large Hadron Collider (LHC) with the center-of-mass energy of 14 TeV. We focus on signals of the tZ associated production with the decay mode t→W+b→bℓ+νℓ, Z→ℓ+ℓ−, and tt¯ production with the decay mode t¯→Z(→ℓ+ℓ−)q¯ and t→bℓ+νℓ, where ℓ=e,μ and q reflects up and charm quarks. It is shown that at 3σ level, the FCNC top quark decay branching ratios can be probed at, respectively, about Br(t→uZ)≤1.3×10−4 and Br(t→cZ)≤4.2×10−4 with the integrated luminosity of 100 fb−1, and probed down to Br(t→uZ)≤2.2×10−5 and Br(t→cZ)≤8×10−5 for the high-luminosity LHC with 3000 fb−1. |
| first_indexed | 2024-12-12T14:47:04Z |
| format | Article |
| id | doaj.art-2831b890000f4c3b935371d319168d79 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-12T14:47:04Z |
| publishDate | 2018-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-2831b890000f4c3b935371d319168d792022-12-22T00:21:06ZengElsevierPhysics Letters B0370-26931873-24452018-01-01776C39139510.1016/j.physletb.2017.11.055Searches for anomalous tqZ couplings from the trilepton signal of tZ associated production at the 14 TeV LHCJie-Fen Shen0Yu-Qi Li1Yao-Bei Liu2School of Biomedical Engineering, Xinxiang Medical University, Xinxiang 453003, PR ChinaHenan Institute of Science and Technology, Xinxiang 453003, PR ChinaHenan Institute of Science and Technology, Xinxiang 453003, PR ChinaWe investigate the observability of the top anomalous tqZ couplings via the trilepton signatures at the Large Hadron Collider (LHC) with the center-of-mass energy of 14 TeV. We focus on signals of the tZ associated production with the decay mode t→W+b→bℓ+νℓ, Z→ℓ+ℓ−, and tt¯ production with the decay mode t¯→Z(→ℓ+ℓ−)q¯ and t→bℓ+νℓ, where ℓ=e,μ and q reflects up and charm quarks. It is shown that at 3σ level, the FCNC top quark decay branching ratios can be probed at, respectively, about Br(t→uZ)≤1.3×10−4 and Br(t→cZ)≤4.2×10−4 with the integrated luminosity of 100 fb−1, and probed down to Br(t→uZ)≤2.2×10−5 and Br(t→cZ)≤8×10−5 for the high-luminosity LHC with 3000 fb−1.http://www.sciencedirect.com/science/article/pii/S0370269317309474 |
| spellingShingle | Jie-Fen Shen Yu-Qi Li Yao-Bei Liu Searches for anomalous tqZ couplings from the trilepton signal of tZ associated production at the 14 TeV LHC Physics Letters B |
| title | Searches for anomalous tqZ couplings from the trilepton signal of tZ associated production at the 14 TeV LHC |
| title_full | Searches for anomalous tqZ couplings from the trilepton signal of tZ associated production at the 14 TeV LHC |
| title_fullStr | Searches for anomalous tqZ couplings from the trilepton signal of tZ associated production at the 14 TeV LHC |
| title_full_unstemmed | Searches for anomalous tqZ couplings from the trilepton signal of tZ associated production at the 14 TeV LHC |
| title_short | Searches for anomalous tqZ couplings from the trilepton signal of tZ associated production at the 14 TeV LHC |
| title_sort | searches for anomalous tqz couplings from the trilepton signal of tz associated production at the 14 tev lhc |
| url | http://www.sciencedirect.com/science/article/pii/S0370269317309474 |
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