2000 character limit reached
On two-body and three-body spin correlations in leptonic $t\bar{t}Z$ production and anomalous couplings at the LHC (2204.12152v2)
Published 26 Apr 2022 in hep-ph and hep-ex
Abstract: We study the anomalous $t\bar{t}Z$ couplings in the $t\bar{t}Z$ production in leptonic 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. We estimate one parameter and simultaneous limits on the couplings of the effective vertex as well as the effective operators for a set of luminosities $150$ fb${-1}$, $300$ fb${-1}$, $1000$ fb${-1}$, and $3000$ fb${-1}$. The polarizations and the spin correlations are found to be helpful on top of the cross section to better constrain the anomalous couplings.