Single production of vectorlike T quark decaying into Wb at the LHC and the future pp colliders

In a simplified model including a singlet vectorlike top partner T with charge 2/3, we investigate the single production of T decaying into Wb in the four flavor scheme at the 14 TeV LHC, high luminosity LHC, and future high energy pp colliders, such as high energy (HE)-LHC with root s = 27 TeV and FCC-hh with root s = 100 TeV. By performing a detailed detector simulation and the background analysis, we display the excluding capability on the top partner T at different colliders with a different integrated luminosity at 95% confidence level. We find that the excluding capability is enhanced obviously with the increase of the collision energy and the HE-LHC and FCC-hh have a greater advantage in high m(gamma) regions. If the colliders reach their high integrated luminosity, (1) the high luminosity LHC can exclude the region g* is an element of [0.19, 0.50] with m(gamma) is an element of [1300 GeV, 2420 GeV] with 3 ab(-1) , (2) the HE-LHC can exclude the regions g* is an element of [0.07, 030] with m(gamma) is an element of [1300 GeV, 4500 GeV] with 15 ab(-1), and (3)the FCC-hh can exclude the regions g* is an element of [0.02,0.50] with m(gamma) is an element of [1300 GeV, 11250 GeV] with 30 ab(-1). For these typical integrated luminosities, we also display the discovering capability on the top partner T at different colliders. Besides, if the narrow width approximation limit is considered, we find that the excluding and discovering parameter space will be reduced.