Associated production of the top-pions and single top at hadron colliders
نویسندگان
چکیده
In the context of topcolor assisted technicolor(TC2) models, we study the production of the top-pions π t with single top quark via the processes pp̄ → tπ0 t+X and pp̄ → tπ t + X, and discuss the possibility of detecting these new particles at Tevatron and LHC. We find that it is very difficult to observe the signals of these particles via these processes at Tevatron, while the neutral and charged top-pions π0 t and π ± t can be detecting via considering the same sign top pair ttc̄ event and the ttb̄ (or tt̄b) event at LHC, respectively. PACS number: 14.80.Cp, 12.60.Cn, 12.15.Lk ∗E-mail:[email protected]
منابع مشابه
Top quark associated production of topcolor pions at hadron colliders
We investigate the associated production of a neutral physical pion with top quarks in the context of topcolor assisted technicolor. We find that single-top associated production does not yield viable rates at either the Tevatron or LHC. tt̄-associated production at the Tevatron is suppressed relative to Standard Model tt̄H, but at the LHC is strongly enhanced and would allow for easy observation...
متن کاملThe productions of the top-pions and top-Higgs associated with the charm quark at the hadron colliders
Abstract In the topcolor-assistant technicolor (TC2) model, the typical physical particles, top-pions and top-Higgs, are predicted and the existence of these particles could be regarded as the robust evidence of the model. These particles are accessible at the Tevatron and LHC, and furthermore the flavor-changing(FC) feature of the TC2 model can provide us a unique chance to probe them. In this...
متن کاملProbing the topcolor-assisted technicolor model via the single t-quark production at Hadron colliders
The single t-quark production in proton-proton collisions can proceed through three distinct processes, tq, tb̄, tW productions. With the running of the Large Hadron Collider(LHC) at CERN, it has good potential to measure each single t-quark production mode. The topcolor-assisted technicolor(TC2) model, one of the promising dynamical theories, predicts some new particles at several hundred GeV s...
متن کاملSingle Top Quark Production via FCNC Couplings at Hadron Colliders
We calculate single top–quark production at hadron colliders via the chromo–magnetic flavor–changing neutral current couplings t̄cg and t̄ug. We find that the strength for the anomalous t̄cg (t̄ug) coupling may be probed to κc/Λ = 0.092 TeV −1 (κu/Λ = 0.026 TeV ) at the Tevatron with 2 fb of data and κc/Λ = 0.013 TeV −1 (κu/Λ = 0.0061 TeV) at the LHC with 10 fb of data. The two couplings may be dis...
متن کاملHelicity Amplitudes for Single-Top Production
Single top quark production at hadron colliders allows a direct measurement of the top quark charged current coupling. We present the complete tree-level helicity amplitudes for four processes involving the production and semileptonic decay of a single top quark: W -gluon fusion, flavor excitation, s-channel production and W associated production. For the first three processes we study the qual...
متن کامل