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Search for active-sterile neutrino transitions using Pierre Auger Observatory data
The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu +348
We investigate the sensitivity of the Pierre Auger Observatory to physics beyond the Standard Model arising from magnetic-moment-induced transitions between active and heavy steril…
Constraints on metastable superheavy dark matter coupled to sterile neutrinos with the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu +368
Dark matter particles could be superheavy, provided their lifetime is much longer than the age of the universe. Using the sensitivity of the Pierre Auger Observatory to ultra-high…
Leptogenesis, Z' bosons, and the reheating temperature of the Universe
J. Racker, E. Roulet
We study the impact for leptogenesis of new U(1) gauge bosons coupled to the heavy Majorana neutrinos. They can significantly enhance the efficiency of thermal scenarios in the wea…
CP violation in scatterings, three body processes and the Boltzmann equations for leptogenesis
Enrico Nardi, Juan Racker, Esteban Roulet
We obtain the Boltzmann equations for leptogenesis including decay and scattering processes with two and three body initial or final states. We present an explicit computation of t…
The importance of flavor in leptogenesis
Enrico Nardi, Yosef Nir, Esteban Roulet +1
We study leptogenesis from the out-of-equilibrium decays of the lightest heavy neutrino in the medium (low) temperature regime, $T\lsim 10^{12}$ GeV ( GeV), where th…
On Higgs and sphaleron effects during the leptogenesis era
Enrico Nardi, Yosef Nir, Juan Racker +1
We discuss the effects of various processes that can be active during the leptogenesis era, and present the Boltzmann equations that take them into account appropriately. A non-van…