Search for the production of four top quarks in the single-lepton and opposite-sign dilepton final states in proton-proton collisions at √s = 13 TeV; Journal of High Energy Physics; Vol. 2019, iss. 11
| Parent link: | Journal of High Energy Physics Vol. 2019, iss. 11.— 2019.— [82, 52 p.] |
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| Egile korporatiboa: | , |
| Beste egile batzuk: | , , , , , , , , |
| Gaia: | Title screen A search for the standard model production of four top quarks (pp → tt¯tt¯tt¯tt¯) is reported using single-lepton plus jets and opposite-sign dilepton plus jets signatures. Proton-proton collisions are recorded with the CMS detector at the LHC at a center-of-mass energy of 13 TeV in a sample corresponding to an integrated luminosity of 35.8 fb−1. A multivariate analysis exploiting global event and jet properties is used to discriminate tt¯tt¯tt¯tt¯ from tt¯tt¯ production. No significant deviation is observed from the predicted background. An upper limit is set on the cross section for tt¯tt¯tt¯tt¯ production in the standard model of 48 fb at 95% confidence level. When combined with a previous measurement by the CMS experiment from an analysis of other final states, the observed signal significance is 1.4 standard deviations, and the combined cross section measurement is 13+11−913−9+11 fb. The result is also interpreted in the framework of effective field theory. Режим доступа: по договору с организацией-держателем ресурса |
| Hizkuntza: | ingelesa |
| Argitaratua: |
2019
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| Gaiak: | |
| Sarrera elektronikoa: | https://doi.org/10.1007/JHEP11(2019)082 |
| Formatua: | Baliabide elektronikoa Liburu kapitulua |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662410 |