The year 2013 marks the 100th anniversary of the birth of Bruno Pontecorvo, who first suggested the possibility that neutrinos might have a nonzero mass such that oscillations among different neutrino states might occur. Pontecorvo constantly pursued this idea, after the discovery of other neutrino flavours, until his death.

We would like, with this special issue, to contribute to the celebration of this anniversary, by collecting a number of articles on neutrino masses and neutrino oscillations, both of which have been the subject of extensive studies and tremendous progress over the last decades.

The subject of neutrino mass acquires an even bigger interest after the recent announcement of the existence of a new boson which is likely to be the elusive Higgs boson.

If confirmed by subsequent results, then it will represent a beautiful confirmation of several aspects of the standard model. However, in the present formulation of the standard model neutrinos are massless, in contradiction with their tiny masses as inferred by oscillation experiments. Some models link this smallness to the existence of very heavy mass states, thus opening a window on a much higher mass scale.

Therefore, the issues of neutrino mass and of lepton number violation add an unprecedented momentum in the quest for new physics beyond the standard model.

We, therefore, invite researchers in this field to contribute with articles on the subject. These can be original research articles or reviews, of either an experimental or theoretical nature. Potential topics include, but are not limited to:

• Direct neutrino mass measurements
• Neutrino oscillations at nuclear reactors
• Neutrino oscillations at high energy accelerators
• Atmospheric neutrino oscillations
• Solar neutrino oscillations
• Neutrino masses and oscillations in astrophysics and cosmology
• Global analyses of neutrino oscillations
• Future neutrino oscillation experiments
• CP violation in the neutrino sector
• Theoretical issues in neutrino oscillations
• Neutrino masses beyond the standard model
• Theoretical predictions for neutrinoless double-beta decay
• Double-beta decay experiments
• Lepton flavour violation
• Signature of neutrino mass models at LHC
• Sterile neutrinos

Before submission authors should carefully read over the journal's Author Guidelines, which are located at http://www.hindawi.com/journals/ahep/guidelines/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/submit/journals/ahep/nmo/ according to the following timetable: