Top Quark Forward-Backward Asymmetry and Anomalous Right-Handed Charge Currents

Abstract

Recent measurements of the top quark forward-backward asymmetry at the Tevatron could hint at new physics with an unexpected flavor structure. The significance of such an abnormal flavor structure in alleviating the tension between the various determinations of $|V_{ub}|$ via right-handed charge currents is studied. In particular, we elaborate on how the associated new flavor changing couplings naturally allow for the generation of anomalous loop-induced right-handed charge currents which can simultaneously remove the tension in the determinations of $|V_{ub}|$ and escape the tight indirect bounds from $B \ra X_s γ$.

20 pages, 8 figures, references added, minor changes to text, new collider signatures added, matches version accepted for publication in JHEP

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Cited by in corpus (11)

• Confronting Top AFB with Parity Violation Constraints
• Top A_FB at the Tevatron vs. charge asymmetry at the LHC in chiral U(1) flavor models with flavored Higgs doublets
• Probing topcolor-assisted technicolor from top charge asymmetry and triple-top production at the LHC
• Search for $t{Z}^{\prime }$ associated production induced by $tc{Z}^{\prime }$ couplings at the LHC
• Top quark forward-backward asymmetry and W^prime bosons
• Same-sign Tops: A Powerful Diagnostic Test for Models of New Physics
• Ultraviolet Completions of Axigluon Models and Their Phenomenological Consequences
• Improving top quark induced charge asymmetries at the LHC using ttbar transverse momentum
• Constraining Unparticles from Top Physics at TeVatron
• Top-quark forward-backward asymmetry from a color-octet t-channel resonance
• Right-handed current contributions in B -> K pi decays