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10–14 Nov 2021
暨南大学
Asia/Shanghai timezone

Testing leptogenesis at the LHC and future muon colliders: a Z′ scenario

Not scheduled
15m
暨南大学

暨南大学

Speaker

Dr 威 刘 (南京理工大学)

Description

If the masses of at least two generations of right-handed neutrinos (RHNs) are near-degenerate, the scale of leptogenesis can be as low as ∼ 100 GeV. In this work, we study probing such resonant leptogenesis in the B B L model at the LHC and future multi-TeV muon colliders via the process Z' → NN → l± l± + jets, with Z0 the U(1)B-L gauge boson and N the RHN. The same-sign dilepton feature of the signal makes it almost background-free, while the event number difference between positive and negative leptons is a hint for CP violation, which is a key ingredient of leptogenesis. We found that resonant leptogenesis can be tested at the HL-LHC for MZ' up to 12 TeV, while at a 10 (30) TeV muon collider the reach can be up to MZ' ∼ 30 (100) TeV via the off-shell production of Z'.
Presentation type Oral

Primary authors

Dr 威 刘 (南京理工大学) Dr 柯盼 谢 (Department of Physics and Astronomy, University of Nebraska, Lincoln)

Presentation materials

There are no materials yet.