Anomalous single production of the fourth generation quarks at the CERN LHC

Abstract

Possible anomalous single productions of the fourth standard model generation up and down type quarks at CERN Large Hadron Collider are studied. Namely, $pp\ensuremath{\rightarrow}{u}_{4}({d}_{4})X$ with subsequent ${u}_{4}\ensuremath{\rightarrow}b{W}^{+}$ process followed by the leptonic decay of the $W$ boson and ${d}_{4}\ensuremath{\rightarrow}b\ensuremath{\gamma}$ (and its H.c.) decay channel are considered. Signatures of these processes and corresponding standard model backgrounds are discussed in detail. Discovery limits for the quark mass and achievable values of the anomalous coupling strength are determined.