T-Anomaly Induced LHC Signals

Abstract

$\mathcal{T}$-parity in the Little Higgs model could be violated by anomalies that allow the lightest $\mathcal{T}$-odd $A_H$ to decay into $ZZ$ and $W^{+}{W}^{-}$. We analyze these anomaly induced decays and the two-particle and the three-particle decay modes of other heavy quarks and bosons in this model which yield unique Large Hadron Collider (LHC) signals with fully reconstructable events. $\mathcal{T}$-odd quarks in the Little Higgs model are nearly degenerate in mass and they decay by almost identical processes; however, members of the heavy Higgs triplet follow distinct decay modes. The branching fractions of three-body decays increase with the global symmetry-breaking energy scale $f$ and are found to be at the level of a few percent in heavy quark decays while they can reach up to 10% for heavy bosons.

17 pages, 7 figures, 2 tables; Label in Fig.1 corrected, references added; Graphic quality of figures improved

Cited by in corpus (7)

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• Decays of the Littlest Higgs Z_H and the Onset of Strong Dynamics
• Topological physics in the standard model and beyond
• Not T-parity but C-parity