Anomalous production of fourth-family up-quarks at future lepton hadron colliders

Abstract

We investigate the production of fourth family up-type quarks using effective lagrangian approach at future lepton-hadron colliders and study the kinematical characteristics of the signal with an optimal set of cuts. We obtain the upper mass limits 500 GeV at THERA and one TeV at Linac ⊗ LHC.

Search for the Anomalous Interactions of Up-Type Heavy Quarks inγγCollision at the LHC

“…Moreover, we can expect a crucial addition from anomalous interactions for production of fourth family quarks. These interactions have been investigated at lepton colliders at lepton colliders [30,31], γe colliders [32], ep colliders [10,[33][34][35], and hadron colliders [8,28,[36][37][38][39][40][41][42][43][44][45].…”

Analyzing the Anomalous Dipole Moment Type Couplings of Heavy Quarks with FCNC Interactions at the CLIC

“…Serious contributions can be expected for the production of the heavy fermions, due to the anomalous magnetic moment type interactions. Phenomenological studies with these anomalous effects of these quarks have been performed at hadron colliders [25][26][27][28][29][30], at ep colliders [31,32] and at linear colliders [33]. In this work, we study the production of single heavy t ′ quark at Compact Linear Collider (CLIC) [34] The interaction Lagrangian for t ′ quark within the SM is given by…”

Anomalous single production of fourth family up-type quark associated with neutral gauge bosons at the LHC

“…A serious contribution can be expected for the production of the fourth family fermions from the anomalous interactions. These effects of the fourth family quarks have been studied in detail at future linear colliders [25], ep colliders [26,27] and, recently, at hadron colliders [28]. The anomalous resonant production of fourth family up-type quarks via the gq i → t (q i = u, c) subprocess [29,30] and single production of fourth family quarks [31] have been studied at the LHC.…”