Dutta, B (reprint author), Texas A&M Univ, Mitchell Inst Fundamental Phys & Astron, Dept Phys & Astron, College Stn, TX 77843 USA.
The recent excess in the CMS measurements of eejj and e nu jj channels and the emergence of PeV cosmic neutrino events at the IceCube experiment share an intriguing implication for a leptoquark with a 600-650 GeV mass. We investigate the CMS constraints on the flavor structure of a scenario with the minimal leptoquark Yukawa couplings and correlate such a scenario to the resonant enhancement in the very high energy shower event rates at the IceCube. We find for a single leptoquark, the CMS signals require large couplings to the third generation leptons. This leads to an enhancement in the nu(tau)-nucleon scattering cross section and subsequently more nu(tau) events at PeV energies. However, a visible enhancement above the Standard Model scattering would require a leptoquark Yukawa coupling larger than one that can be easily tested at the upcoming LHC runs.
; Mitchell Institute for Fundamental Physics and Astronomy
; Natural Science Foundation of China [11135003, 11275246, 11475238]
; National Basic Research Program of China (973 Program) [2010CB833000]
; Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science [NRF-2013R1A1A1007068]
; NSF [PHY-1522717]