We construct a supersymmetric flipped SU(5) grand unified model that possesses an R symmetry. This R symmetry forbids dangerous non-renormalizable operators suppressed by a cut-off scale up to sufficiently large mass dimensions so that the SU(5)-breaking Higgs field develops a vacuum expectation value of the order of the unification scale along the F- and D-flat directions by the supersymmetry-breaking effect. The mass terms of the Higgs fields are forbidden the R symmetry, with which the doublet-triplet splitting problem is solved with the missing partner mechanism. The masses of right-handed neutrinos are generated by non-renormalizable operators, which then yield light neutrino masses through the seesaw mechanism. This model predicts one of the color-triplet Higgs multiplets to lie at an intermediate scale, and its mass is constrained by proton decay experiments. Future proton decay experiments at Hyper-Kamiokande in p → π 0µ + and p → K0µ + decay modes can distinguish our model from other scenarios.

[Lunchbox Registration]
If you will attend the seminar and would like to have a lunchbox on that day, please fill out the online registration form below by 10:00AM Jan. 22nd (Friday morning). Late registration will not be accepted.
*Note:
1. The lunchboxes will only be prepared for the participation of professors and postdoctoral researchers.
2. In order to prevent the potential spread of COVID-19, we suggest that you bring your own face mask and wear it while attending the seminar.
3. You may check this web page again later after you have completed the online registration. The data for the list of registered attendees will be updated every 5 minutes and shown at the bottom of the page. 



[List of Attendees Registered for the Lunchboxes]