The Top Forward Backward Asymmetry with general Z ' couplings

Abstract

The measurement of the top forward-backward asymmetry in $\ttbar$ production measured at the Tevatron shows deviation from the Standard Model prediction. A $u\to t$ transition via a flavor changing $Z^{\prime }$ can explain the data. We show that left handed $t_L{u}_L{Z}^{\prime }$ couplings can be constrained from $B_{d,s}$ mixing while the constrains on the right handed couplings $t_R{u}_R{Z}^{\prime }$ vanish in the limit of $m_u\to 0$. We then consider the most general form of the $tu{Z}^{\prime }$ interaction which includes vector-axial vector as well as tensor type couplings and study how these couplings affect the top forward-backward asymmetry.

13 pages, 14 figures, minor typos corrected, accepted for publication in Physical Review D

References in corpus (34)

• Parton distributions for the LHC
• Measuring the running top-quark mass
• Updated predictions for the total production cross sections of top and of heavier quark pairs at the Tevatron and at the LHC
• First measurement of the forward-backward charge asymmetry in top quark pair production
• Anatomy of New Physics in B-Bbar mixing
• The theoretical top quark cross section at the Tevatron and the LHC
• Measurement of $\boldmath {B_s^0}$ mixing parameters from the flavor-tagged decay
• Threshold Resummation for the Top Quark Charge Asymmetry
• Constraining heavy colored resonances from top-antitop quark events
• Top Quark Forward-Backward Asymmetry and Same-Sign Top Quark Pairs
• LHC Predictions from a Tevatron Anomaly in the Top Quark Forward-Backward Asymmetry
• Top quark asymmetry from a non-Abelian horizontal symmetry
• Forward-backward asymmetry in t anti-t production from flavour symmetries
• On Models of New Physics for the Tevatron Top A_FB
• Light Z' Bosons at the Tevatron
• Axigluons cannot explain the observed top quark forward-backward asymmetry
• Massive Color-Octet Bosons: Bounds on Effects in Top-Quark Pair Production
• No like-sign tops at Tevatron: Constraints on extended models and implications for the t tbar asymmetry
• Forward-backward asymmetry in top quark production from light colored scalars in SO(10) model
• Top polarization, forward-backward asymmetry and new physics
• Top-Quark Forward-Backward Asymmetry in Randall-Sundrum Models Beyond the Leading Order
• Top Quark Forward-Backward Asymmetry in the Large Invariant Mass Region
• Tevatron Asymmetry of Tops in a W',Z' Model
• Forward-backward asymmetry of top quark in unparticle physics
• Forward-backward asymmetries of the bottom and top quarks in warped extra-dimensional models: LHC predictions from the LEP and Tevatron anomalies
• Forward-backward asymmetry and differential cross section of top quark in flavor violating $Z^{\prime }$ model at $\mathcal{O}({\alpha }_s^2{\alpha }_X)$
• Longitudinal top polarization as a probe of a possible origin of forward-backward asymmetry of the top quark at the Tevatron
• A composite Higgs model analysis of forward-backward asymmetries in the production of tops at Tevatron and bottoms at LEP and SLC
• New Color-Octet Vector Boson Revisit
• Top quark asymmetry and Wjj excess at CDF from gauged flavor symmetry
• An effective approach to same sign top pair production at the LHC and the forward-backward asymmetry at the Tevatron
• Top quark forward-backward asymmetry from the $3-3-1$ model
• Gluon excitations in t tbar production at hadron colliders
• Flavor changing Z' couplings at the LHC

Cited by in corpus (26)

• The Azimuthal $B\to D^{\ast }{\tau }^{-}\overline{{\nu }_{\tau }}$ Angular Distribution with Tensor Operators
• Asymmetries in top quark pair production at hadron colliders
• Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
• Flavor Symmetric Sectors and Collider Physics
• Testing new physics models by top charge asymmetry and polarization at the LHC
• Chiral U(1) flavor models and flavored Higgs doublets: the top FB asymmetry and the Wjj
• Tevatron Top $A_{FB}$ Versus LHC Top Physics
• A charged Z' to conciliate the apparent disagreement between top-antitop Tevatron forward-backward asymmetry and LHC charge asymmetry
• Azimuthal Correlations in Top Pair Decays and The Effects of New Heavy Scalars
• Top A_FB at the Tevatron vs. charge asymmetry at the LHC in chiral U(1) flavor models with flavored Higgs doublets
• Diagnosing the top-quark angular asymmetry using LHC intrinsic charge asymmetries
• Top quark forward-backward asymmetry and charge asymmetry in left-right twin Higgs model
• Top Quark Pair Production and Asymmetry at the Tevatron and LHC in Left-Right Models
• Leptophobic Z' Boson and Parity-Violating eD Scattering
• Determining the helicity structure of third generation resonances
• New color-octet axial vector boson revisited
• Top quark forward-backward asymmetry and W^prime bosons
• Same-sign Tops: A Powerful Diagnostic Test for Models of New Physics
• Interpretations and Implications of the Top Quark Rapidity Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell }$
• Next-to-leading order QCD effect of $W^{\prime }$ on top quark Forward-Backward Asymmetry
• Ultraviolet Completions of Axigluon Models and Their Phenomenological Consequences
• Improving top quark induced charge asymmetries at the LHC using ttbar transverse momentum
• Anomalous Wtb coupling and forward-backward asymmetry of top quark production at the Tevatron
• Top quark forward-backward asymmetry in R-parity violating supersymmetry
• Implications of effective axial-vector coupling of gluon for $t\bar{t}$ spin polarizations at the LHC
• Tevatron Top Quark Forward-Backward Asymmetry -- Implications for Same-sign Top Quark Pair Production