Collider Phenomenology of $e^{-}e^{-}\to W^{-}W^{-}$

The Majorana nature of neutrinos is one of the most fundamental questions in particle physics. It is directly related to the violation of accidental lepton number symmetry. This motivated enormous efforts into the search of such processes; among them, one conventional experiment is the neutrinoless double-beta decay (0νββ). On the other hand, there have been proposals of future electron-positron colliders as a “Higgs factory" for the precise measurement of Higgs boson properties, and it has been proposed to convert such a machine into an electron-electron collider. This option enables a new way to probe TeV Majorana neutrinos via the inverse 0νββ decay process (e-e-→W-W-) as an alternative and complementary test to the conventional 0νββ decay experiments. In this paper, we investigate the collider search for e-e-→W-W- in different decay channels at future electron colliders. We find that the pure hadronic channel, the semileptonic channel with a muon, and the pure leptonic channel with a dimuon have the most discovery potential.

Note:

20 pages, 7 figures, add some data, revise introduction and other parts

new physics
ILC Coll
electron positron: scattering
electron electron: scattering
W-: pair production
W-: final state
neutrino: Majorana
neutrino: effect
lepton number: violation
electron electron --> W- W-

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Collider Phenomenology of e−e−→W−W−e^{-}e^{-}\to W^{-}W^{-}e−e−→W−W−

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Collider Phenomenology of $e^{-}e^{-}\to W^{-}W^{-}$