Effective four-fermion operators in top physics: a roadmap

Abstract

We write down a minimal basis for dimension-six gauge-invariant four-fermion operators, with some operator replacements with respect to previous ones which make it simpler for calculations. Using this basis we classify all four-fermion operator contributions involving one or two top quarks. Taking into account the different fermion chiralities, possible colour contractions and independent flavour combinations, a total number of 572 gauge-invariant operators are involved. We apply this to calculate all three-body top decay widths t -> d_k u_i dbar_j, t -> d_k e_i+ nu_j, t -> u_k u_i ubar_j, t -> u_k e_j+ e_i-, t -> u_k nu_j nu_i (with i,j,k generation indices) mediated by dimension-six four-fermion operators, including the interference with the Standard Model amplitudes when present. All single top production cross sections in pp, p pbar and e+ e- collisions are calculated as well, namely u_i d_k -> d_j t, dbar_j d_k -> ubar_i t, u_i dbar_j -> dbar_k t, u_i u_k -> u_j t, u_i ubar_j -> ubar_k t, e+ e- -> ubar_k t and the charge conjugate processes. We also compute all top pair production cross sections, ubar_i u_j -> t tbar, dbar_i d_j -> t tbar, u_i u_j -> t t and e+ e- -> t tbar. Our results are completely general, without assuming any particular relation among effective operator coefficients.

LaTeX 43 pages, 1 PS figure. Cross sections for uu,cc -> tt corrected

References in corpus (17)

• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• A minimal set of top anomalous couplings
• Patterns of Deviation from the Standard Model
• First measurement of the forward-backward charge asymmetry in top quark pair production
• Forward-Backward Asymmetry in Top Quark Production in ppbar Collisions at sqrt{s}=1.96 TeV
• Observable contributions of new exotic quarks to quark mixing
• A minimal set of top-Higgs anomalous couplings
• Single top quark production at LHC with anomalous Wtb couplings
• Effective description of quark mixing
• Search for New Physics via Single Top Production at the LHC
• Model independent analysis of the forward-backward asymmetry of top quark production at the Tevatron
• W polarisation beyond helicity fractions in top quark decays
• Probing Anomalous Top-Quark Couplings Induced by Dim.6 Operators at Photon Colliders
• Flavor changing single top quark production channels at e^+e^- colliders in the effective Lagrangian description
• Zt, gamma t and t production at hadron colliders via strong flavour-changing neutral couplings
• Strong flavour changing effective operator contributions to single top quark production
• Effects of Top-quark Compositeness on Higgs Boson Production at the LHC

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