2022
DOI: 10.48550/arxiv.2204.12152
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On two-body and three-body spin correlations in leptonic $t\bar{t}Z$ production and anomalous couplings at the LHC

Abstract: We study the anomalous t tZ couplings in the t tZ production in 4l + 2b + E T final state at the 13 TeV LHC. We use the polarizations of top quarks and Z boson, two-body and three-body spin correlations among the top quarks and Z boson, and the cross section to probe the anomalous couplings and estimate a limit on the couplings of the effective vertex as well as the effective operators for a set of luminosities 150 fb −1 , 300 fb −1 , and 3000 fb −1 . The polarizations and the spin correlations are found to be… Show more

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“…Most recently, the complete data from the now-defunct CDF experiment at Fermilab has been analysed to yield a value of the W boson mass which shows as much as a 7σ discrepancy with the SM prediction [904]. Though it has immediately become the subject of intense speculation, including by Indians [905][906][907][908][909][910][911][912][913][914], this result will need to be confirmed in the further runs of the LHC before it can be taken in all seriousness. One can only say that, taken together, all these anomalies constitute a tantalising set of hints that the SM may not be the final theory of elementary particles, after all.…”
Section: The Futurementioning
confidence: 99%
“…Most recently, the complete data from the now-defunct CDF experiment at Fermilab has been analysed to yield a value of the W boson mass which shows as much as a 7σ discrepancy with the SM prediction [904]. Though it has immediately become the subject of intense speculation, including by Indians [905][906][907][908][909][910][911][912][913][914], this result will need to be confirmed in the further runs of the LHC before it can be taken in all seriousness. One can only say that, taken together, all these anomalies constitute a tantalising set of hints that the SM may not be the final theory of elementary particles, after all.…”
Section: The Futurementioning
confidence: 99%