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Non-commuting ETC corrections to ztbar{t} vertex

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arxiv hep-ph/9611289 v1 pith:74VNHR7H submitted 1996-11-10 hep-ph

Non-commuting ETC corrections to zt\bar{t} vertex

Uma Mahanta This is my paper
classification hep-ph
keywords correctionsnon-commutingcouplingsparametersvertexwillassumedcalculate
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this paper we calculate the corrections to zt\bar {t} couplings induced by non-commuting ETC interactions. The extra parameters \delgbl, s^2 and {1\over x} of non-commuting ETC models and the usual SM parameters will be be assumed to be determined from a global fit to the LEP 1 EW data. We find that in the heavy (light) case F^t_L is modified by at most 4% (2.8%) relative to its SM value provided \delrb < .0088. This implies that it will be very difficult to disentangle the ETC corrections from SM corrections to zt\bar {t} vertex or to probe the effects of non-commuting ETC on zt\bar {t} couplings with the projected NLC precision of measuring them.

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Cited by 2 Pith papers

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  1. A search for electroweak $t\bar{t}Wj$ production in multileptonic final states at $\sqrt{s} = 13$ TeV with the ATLAS detector and bounds on effective field theory operators

    hep-ex 2025-09 accept novelty 7.0

    First search for electroweak ttWj production at 13 TeV sets observed (expected) 95% CL upper limits of 251 fb (230 fb) versus the SM prediction of 47.7 fb and constrains the O_Ht and O_HQ^(1) EFT operators.

  2. Measurement of high-mass $t\bar{t}\ell^{+}\ell^{-}$ production and lepton flavour universality-inspired effective field theory interpretations at $\sqrt{s}=13$ TeV with the ATLAS detector

    hep-ex 2025-04 unverdicted novelty 4.0

    ATLAS reports a measurement of high-mass ttbar ll production with no observed deviation from the Standard Model and derives EFT constraints on four-fermion operators from 140 fb^{-1} of Run 2 data.