Refined analysis and updated constraints on general non-standard tbW couplings

Abstract

We recently studied possible non-standard tbW couplings based on the effective-Lagrangian which consists of four kinds of SU(3) x SU(2) x U(1) invariant dimension-6 effective operators and gave an experimentally allowed region for each non-standard coupling. We here re-perform that analysis much more precisely based on the same experimental data but on a new computational procedure using the Graphics-Processing-Unit (GPU) calculation system. Comparing these two analyses with each other, the previous one is found to have given quite reliable results despite of its limited computation capability. We then apply this new procedure to the latest data and present updated results.

arXiv commentLaTeX_2e, 8 pages, to appear in Phys.Lett.B

References in corpus (8)

• Dimension-Six Terms in the Standard Model Lagrangian
• A minimal set of top anomalous couplings
• Patterns of Deviation from the Standard Model
• Measurement of the ratio B(t to Wb)/B(t to Wq) in pp collisions at sqrt(s) = 8 TeV
• Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at sqrt(s) = 8 TeV
• Measurement of the W boson helicity in events with a single reconstructed top quark in pp collisions at sqrt(s) = 8 TeV
• New limits on anomalous contributions to the $Wtb$ vertex
• Full analysis of general non-standard tbW couplings

Cited by in corpus (4)

• Probing anomalous $Wtb$ couplings at the LHC in single top quark production through $t$-channel
• Top and bottom tensor couplings from a color octet scalar
• Single top production at linear $e^{-}{e}^{+}$ colliders
• Constraints on generalized non-standard $tbW$ couplings