Search for the signal of monotop production at the early LHC

• Published in: Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2012-08, Vol.86 (3), Article 034008
• Main Authors: Wang, Jian, Li, Chong Sheng, Shao, Ding Yu, Zhang, Hao
• Format: Article
• Language: English
• Subjects: Bosons; Cosmology; Decay; Energy distribution; Energy use; Gravitation; Luminosity; Mass distribution; Mathematical models
• ISSN: 1550-7998; 1550-2368
• DOI: 10.1103/PhysRevD.86.034008

We investigate the potential of the early LHC to discover the signal of monotops, which can be decay products of some resonances in models such as R-parity-violating supersymmetry or SU(5), etc. We show how to constrain the parameter space of the models by the present data of Z boson hadronic decay branching ratio, K super(0)-K super(0) mixing and dijet productions at the LHC. Then, we study the various cuts imposed on the events, reconstructed from the hadronic final states, to suppress backgrounds and increase the significance in detail. And we find that in the hadronic mode the information from the missing transverse energy and reconstructed resonance mass distributions can be used to specify the masses of the resonance and the missing particle. Finally, we study the sensitivities to the parameters at the LHC with [radical]s = 7 TeV and an integrated luminosity of 1 fb super(-1) in detail. Our results show that the early LHC may detect this signal at 5[sigma] level for some regions of the parameter space allowed by the current data.