2023/10/31 by J. A. Aguilar-Saavedra, J. A. Aguilar–Saavedra · 10 citations
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Dark Matter and Cosmic Phenomena
paper · pdf · doi:10.1103/physrevd.108.076025
Top pairs produced at the Large Hadron Collider exhibit quantum entanglement of their spins near threshold and for boosted, central tt pairs. The entanglement is maintained between the decay products, in particular, between the top quark and the W^\ensuremath- boson from the antiquark (or vice versa, between t and W+) in certain kinematical regions. Therefore, tt production provides a rare opportunity to verify the spin entanglement between a fermion and a boson. The tW entanglement can be probed at the 7\ensuremathσ level near threshold with run 2 data and at the 5\ensuremathσ level in the boosted region with the foreseen run 3 luminosity. In addition, the entanglement between the two W bosons can be probed at the 4\ensuremathσ level at the LHC run 3.