All Results

Top quark FCNC decays and productions at LHC in littlest Higgs model with T-parity

Han,X; Wang,L; Yang,JMSubjects:

In the littlest Higgs model with T-parity (LHT) the newly introduced mirror quarks have flavor-changing couplings with the Standard Model (SM) quarks and may enhance the flavor-changing neutral-current (FCNC) top quark interactions which are extremely sup |

submitted time
2016-12-28
Hits*3051*，
Downloads*1757*，
Comment
*0*

Subjects:

We examine the lepton flavor-changing processes in R -parity violating MSSM. First, we update the constraints on the relevant R -violating couplings by using the latest data on the rare decays ? i → ? j γ . We find that the updated constraints are much st |

submitted time
2016-12-28
Hits*2994*，
Downloads*1817*，
Comment
*0*

Top quark forward-backward asymmetry and charge asymmetry in left-right twin Higgs model

Wang,L; Wu,L; Yang,JMSubjects:

In order to explain the Tevatron anomaly of the top quark forward-backward asymmetry AtFBAFBtA_{FB}^t in the left-right twin Higgs model, we choose to give up the lightest neutral particle of h^h^\hat{h} field as a stable dark matter candidate. Then a new |

submitted time
2016-12-28
Hits*2175*，
Downloads*1229*，
Comment
*0*

Probing topcolor-assisted technicolor from top charge asymmetry and triple-top production at the LHC

Han,C; Liu,N; Wu,L; Yang,JMSubjects:

In a topcolor-assisted technicolor model (TC2) with large FCNC top quark couplings, we study its correlated contributions to the top quark forward-backward asymmetry (AF B ) at the Tevatron, the top charge asymmetry (AC) and the triple-top production at the LHC. Under current constraints on the top quark from the LHC and Tevatron (such as the total and differential production rates), we scan the parameter space of such a TC2 model. We find that in the allowed parameter space the TC2 model can explain the Tevatron measured AFB at 2σ level, but meanwhile significantly enhance AC at the LHC. Such enhanced AC, albeit currently allowed by the LHC measurement at 2σ level, will serve as a test of TC2 with the improvement of measurement precision at the LHC. Then with all the constraints (including the requirement to explain AF B at 2σ level and satisfying the current LHC measurement of AC at 2σ level), we find that the TC2 model can induce sizable triple-top production at the 14 TeV LHC (the production rate can maximally reach 16 pb). Due to the low SM backgrounds, the triple-top production can also be a good probe for TC2 model, complementary to AC. |

submitted time
2016-12-28
Hits*1992*，
Downloads*1100*，
Comment
*0*

SUSY induced top quark FCNC decay t→cht→cht \rightarrow { ch} after Run I of LHC

Cao,J; Han,C; Wu,L; Yang,JM; Zhang,MSubjects:

In light of the Higgs discovery and the nonobservation of sparticles at the LHC, we revisit the supersymmetric theory (SUSY) induced top quark flavor-changing decay into the Higgs boson. We perform a scan over the relevant SUSY parameter space by consider |

submitted time
2016-12-28
Hits*2133*，
Downloads*1250*，
Comment
*0*

B(sss, d)→μ+μ?d)→μ+μ?d^{)} \to \mu^{+} \mu^{-} in technicolor model with scalars

Xiong,Z; Yang,JMSubjects:

Rare decays B_{s,d}-->mu^+ mu^- are evaluated in technicolor model with scalars. R_b is revisited to constrain the model parameter space. It is found that restriction on f/f' arising from R_b which was not considered in previous studies requires f/f' no l |

SUSY-induced FCNC top-quark processes at the large hadron collider

Cao,J; Eilam,G; Frank,M; Hikasa,K; Liu,G; Turan,I; Yang,JSubjects:

We systematically calculate various flavor-changing neutral-current top-quark processes induced by supersymmetry at the Large Hadron Collider, which include five decay modes and six production channels. To reveal the characteristics of these processes, we |

submitted time
2016-12-28
Hits*1874*，
Downloads*1096*，
Comment
*0*

Top-quark FCNC Productions at CERN LHC in Topcolor-assisted Technicolor Model

Cao,J; Liu,G; Yang,JM; Zhang,HSubjects:

We evaluate the top-quark FCNC productions induced by the topcolor assisted technicolor (TC2) model at the LHC. These productions proceed respectively through the parton-level processes g g -> t c_bar, c g->t, c g -> t g, c g -> t Z and c g -> t \gamma. W |

Higgs and Z-boson FCNC decays correlated with B-meson decays in littlest Higgs model with T-parity

Han,X; Wang,L; Yang,JMSubjects:

In the littlest Higgs model with T-parity (LHT) new flavor-changing interactions between mirror fermions and the Standard Model (SM) fermions can induce various FCNC decays for B-mesons, Z-boson and Higgs boson. Since all these decays induced in the LHT m |

Top quark FCNC decays and productions at LHC in littlest Higgs model with T-parity

Han,X; Wang,L; Yang,JMSubjects:

In the littlest Higgs model with T-parity (LHT) the newly introduced mirror quarks have flavor-changing couplings with the Standard Model (SM) quarks and may enhance the flavor-changing neutral-current (FCNC) top quark interactions which are extremely sup |