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String derived MSSM and M-theory Unification
G. B. Cleaver, A. E. Faraggi, D. V. Nanopoulos
The recent conjecture of possible equivalence between the string scale and the minimal supersymmetric standard model unification scale M_U ~ 2.5 x 10^{16} GeV is considered i…
Sensitivity of Astrophysical Observations to Gravity-Induced Wave Dispersion in Vacuo
G. Amelino-Camelia, John Ellis, N. E. Mavromatos +2
We discuss possible signatures of quantum gravity for the propagation of light, including an energy-dependent velocity (refractive index), dispersion in velocity at a given energy,…
Cryptons: a stringy form of decaying superheavy dark matter, as a source of the ultra high energy cosmic rays
D. V. Nanopoulos
Cryptons, metastable bound states of matter in the string hidden sector, with dynamically determined masses M_X on the order of 10^{12} GeV and lifetimes tau_X greater than or on t…
Neutrino Textures in the Light of Super-Kamiokande Data and a Realistic String Model
J. Ellis, G. K. Leontaris, S. Lola +1
Motivated by the Super-Kamiokande atmospheric neutrino data, we discuss possible textures for Majorana and Dirac neutrino masses within the see-saw framework. The main purposes of…
A Microscopic Liouville Arrow of Time
John Ellis, N. E. Mavromatos, D. V. Nanopoulos
We discuss the treatment of quantum-gravitational fluctuations in the space-time background as an `environment', using the formalism for open quantum-mechanical systems, which lead…
World-Sheet formulation of M theory
John Ellis, N. E. Mavromatos, D. V. Nanopoulos
We first review the interpretation of world-sheet defects as branes described by a critical theory in 11 dimensions, that we interpret as theory. We then show that -bran…