Flavour violation at the LHC: type-I versus type-II seesaw in minimal supergravity

Abstract

We reconsider the role that the possible detection of lepton flavour violating (LFV) decays of supersymmetric particles at the Large Hadron Collider (LHC) can play in helping reconstruct the underlying neutrino mass generation mechanism within the simplest high-scale minimal supergravity (mSUGRA) seesaw schemes. We study in detail the LFV scalar tau decays at the LHC, assuming that the observed neutrino masses arise either through the pure type-I or the simpler type-II seesaw mechanism. We perform a scan over the mSUGRA parameter space in order to identify regions where lepton flavour violating decays of ${\chi }_2^0$ can be maximized, while respecting current low-energy constraints, such as those coming from the bounds on Br($\mu \to e\gamma$). We estimate the cross section for ${\chi }_2^0\to {\chi }_1^0+\tau +\mu$. Though insufficient for a full reconstruction of the seesaw, the search for LFV decays of supersymmetric states at the LHC brings complementary information to that coming from low energy neutrino oscillation experiments and LFV searches.

20 pages, 13 figures; minor changes; 4 references added, final version for publication

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Cited by in corpus (13)

• SARAH 3.2: Dirac Gauginos, UFO output, and more
• The low-scale approach to neutrino masses
• LHC and lepton flavour violation phenomenology of a left-right extension of the MSSM
• Implications of gauge kinetic mixing on Z' and slepton production at the LHC
• Dark matter in minimal supergravity with type-II seesaw
• Beyond the standard seesaw: neutrino masses from Kahler operators and broken supersymmetry
• Fair scans of the seesaw. Consequences for predictions on LFV processes
• Searching for lepton flavor violating interactions at future electron-positron colliders
• Supersymmetric type-III seesaw: lepton flavour violation and LHC phenomenology
• Lepton Flavor Violation in Complex SUSY Seesaw Models with Nearly Tribimaximal Mixing
• LHC phenomenology of supersymmetric models beyond the MSSM
• Considerations on supersymmetric Dark Matter beyond the MSSM
• Lepton Flavor Violation of Z Gauge Boson Decays in Supersymmetric Type-III Seesaw Model