New Color-Octet Vector Boson Revisit

Abstract

Motivated by CDF recent measurements on di-jet invariant mass spectrum where di-jet is associated production with charged leptons ($e/\mu$) and missing energy, we re-examine the previous proposed massive color-octet axial-vector-like boson $Z_c$. Our simulation showed that the di-jet bump around 120-160 GeV can be induced by $Z_c$ with effective coupling $g_{Z_{c}q\bar{q}}=0.2g_s$ (q represents the quark other than top and $g_s$ is the strong coupling constant). Moreover our numerical investigation indicated that the top quark forward-backward asymmetry $A_{FB}^t$ can be reproduced without distorting shape of differential cross section $d\sigma /d{M}_{t\bar{t}}$, provided that the $Z_c$ and top quark coupling is appropriately chosen ($g_{Z_{c}t\bar{t}}\simeq 4.5g_{Z_{c}q\bar{q}}$). Our results also showed that the theoretical $A_{FB}^t$ as functions of $\Delta y$ and $M_{t\bar{t}}$ can be consistent with data within $1\sigma$ and $1.8\sigma$ respectively.

8 pages, 3 EPS figures

References in corpus (10)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• MadEvent: Automatic Event Generation with MadGraph
• Invariant Mass Distribution of Jet Pairs Produced in Association with a W boson in ppbar Collisions at sqrt(s) = 1.96 TeV
• A Z' Model for the CDF Dijet Anomaly
• One-side Forward-backward Asymmetry in Top Quark Pair Production at CERN Large Hadron Collider
• Measurement of the WW+WZ Production Cross Section Using the Lepton+Jets Final State at CDF II
• Edge Charge Asymmetry in Top Pair Production at the LHC
• One-side forward-backward asymmetry at the LHC
• Axigluon Couplings in the Presence of Extra Color-Octet Spin-One Fields

Cited by in corpus (34)

• An Effective Z'
• A Polarized View of the Top Asymmetry
• Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
• Quirks at the Tevatron and Beyond
• Z'-gauge Bosons as Harbingers of Low Mass Strings
• Effective axial-vector coupling of gluon as an explanation to the top quark asymmetry
• The Top Forward Backward Asymmetry with general Z ' couplings
• Weak-triplet, color-octet scalars and the CDF dijet excess
• Very Light Axigluons and the Top Asymmetry
• Signatures of Resonant Super-Partner Production with Charged-Current Decays
• Possible Common Origin of the Top Forward-backward Asymmetry and the CDF Dijet Resonance
• Top quark forward-backward asymmetry and charge asymmetry in left-right twin Higgs model
• Dijet resonance from leptophobic Z' and light baryonic cold dark matter
• New color-octet axial vector boson revisited
• Interpretations and Implications of the Top Quark Rapidity Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell }$
• A light charged Higgs boson in two-Higgs doublet model for CDF $Wjj$ anomaly
• NLO predictions for a lepton, missing transverse momentum and dijets at the Tevatron
• Hermitian Flavor Violation
• Top quark physics in the Vector Color-Octet Model
• Measuring the Bottom-Quark Forward-Central Asymmetry at the LHC
• A Higgsophilic s-channel Z' and the CDF W+2J Anomaly
• Dimuon CP Asymmetry in B Decays and Wjj Excess in Two Higgs Doublet Models
• R parity violating supersymmetric explanation for the CDF Wjj excess
• Various Models Mimicking the SM Higgs Boson
• Constraining Unparticles from Top Physics at TeVatron
• Implications of effective axial-vector coupling of gluon for $t\bar{t}$ spin polarizations at the LHC
• Leptophobic Z' in Heterotic-String Derived Models
• The Golden Mode for a Baryonic $Z^{\prime }$ Boson at Hadronic Colliders: pp/ppbar -> WZ' -> l nu b b-bar
• What the Tevatron Found?
• Dissecting the Wjj Anomaly: Diagnostic Tests of a Leptophobic Z'
• Strong, weak and flavor scalar triplets for the CDF Wjj anomaly
• Anomaly Puzzle, Curved-Spacetime Spinor Hamiltonian, and String Phenomenology
• LHC Test of CDF $Wjj$ anomaly
• Four Jets as a Probe of O(100 GeV) Physics beyond Standard Model at Hadron Colliders