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Effective Field Theory for Nonstandard Top Quark Couplings

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arxiv 1104.3122 v2 pith:UHBVCF3R submitted 2011-04-15 hep-ph

classification hep-ph
keywords boundeffectivefieldoperatorquarktheorytop-quarkcalculation
verification ladder T0 review T1 audit T2 compute T3 formal

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We present an effective-field-theory calculation of the effect of a dimension-six operator involving the top quark on precision electroweak data via a top-quark loop. We demonstrate the renormalizability, in the modern sense, of the effective field theory. We use the oblique parameter U to bound the coefficient of the operator, and compare with the bound derived from top-quark decay.

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    hep-ph 2026-08 accept novelty 6.0 of 10

    SMEFT electroweak precision predictions can be upgraded to NLL accuracy using two-loop renormalization-group evolution plus one-loop matching, yielding complete 210-coefficient expressions and stronger indirect new-ph...

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