Abstract
Abstract: A search is presented for standard model (SM) production of four top quarks (Formula presented.) in pp collisions in the lepton + jets channel. The data correspond to an integrated luminosity of 19.6 fb−1 recorded at a centre-of-mass energy of 8 TeV with the CMS detector at the CERN LHC. The expected cross section for SM (Formula presented.) production is (Formula presented.). A combination of kinematic reconstruction and multivariate techniques is used to distinguish between the small signal and large background. The data are consistent with expectations of the SM, and an upper limit of 32 fb is set at a 95% confidence level on the cross section for producing four top quarks in the SM, where a limit of 32 ± 17 fb is expected.[Figure not available: see fulltext.].
Original language | English |
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Article number | 154 |
Journal | Journal of High Energy Physics |
Volume | 2014 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2014 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2014, The Author(s).
Funding
Funders | Funder number |
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Not added | ST/H00081X/2 |
National Science Foundation | 1151640, 1314131, 1306951, 1205960, 1120138, 1211067 |
Science and Technology Facilities Council | ST/I505580/1, ST/L00609X/1, ST/I005912/1, ST/J005665/1, ST/J50094X/1, ST/J004901/1, ST/K003542/1, ST/K001256/1, ST/K001639/1, ST/K003844/1, GRIDPP |
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung | 146730, 153664 |
Keywords
- Hadron-Hadron Scattering
- Top physics