84 citations · 247 across the 17 of their papers we have counts for
19 papers · 1 filter
Cosmological vacuum selection in dynamical symmetry breaking at zero vacuum energy
Mateusz Duch, Alessandro Strumia
Coleman-Weinberg models invoke classical scale invariance to forbid scalar masses, but then add a dimensionful constant to cancel the vacuum energy of the broken vacuum. This incon…
A Texture of Leptons for the Koide and Alikhanov relations
Alessandro Strumia
Koide and Alikhanov proposed intriguing empirical relations among charged-lepton masses and neutrino mass splittings, respectively. We present mass-matrix textures that realise the…
Particle production from bubble collisions
Anish Ghoshal, Pratyay Pal, Alessandro Strumia
Collisions of ultra-relativistic bubbles during cosmological phase transitions can produce particles much heavier than the transition scale. Previous analyses modelled this process…
Weak corrections to Minimal Dark Matter annihilations
Dario Buttazzo, Mateusz Duch, Pier Paolo Giardino +1
We compute the one-loop weak corrections to the annihilation cross sections of fermionic Minimal Dark Matter multiplets. Infrared divergences cancel in the dominant -wave combin…
Cosmological collider signals of modular spontaneous CP breaking
Shuntaro Aoki, Alessandro Strumia
We consider a modular-invariant extension of the Standard Model. Assuming that the modulus is the inflaton, the CP-violating phases of the Yukawa couplings evolve during inflation.…
Primordial magnetogenesis from a supercooled dynamical electroweak phase transition
Martin Arteaga Tupia, Anish Ghoshal, Alessandro Strumia
Observations of -ray from blazars suggest the presence of magnetic fields in the intergalactic medium, which may require a primordial origin. Intense enough primordial magnetic…
Solving the strong CP problem in string-inspired theories with modular invariance
Ferruccio Feruglio, Antonio Marrone, Alessandro Strumia +1
We show that solutions to the strong CP problem based on modular invariance can be extended to incorporate features that appear in string compactifications: quarks with mostly posi…
Baryogenesis from cosmological CP breaking
Mateusz Duch, Alessandro Strumia, Arsenii Titov
We show that baryogenesis can arise from the cosmological evolution of a scalar field that governs CP-violating parameters, such as the Yukawa couplings and the theta terms of the…
Solving the strong CP problem
Alessandro Strumia
I briefly review solutions to the strong CP problem based on axions, parity invariance, CP-invariance, and present a new idea based on CP as part of a spontaneously broken flavour…
Optical gravitational waves as signals of Gravitationally-Decaying Particles
Giacomo Landini, Alessandro Strumia
Long-lived heavy particles present during the big bang could have a decay channel opened by gravitons. Such decays can produce gravitational waves with large enough abundance to be…
Is nature natural?
Alessandro Strumia
I summarize the apparent relevance of anthropic selection in understanding unnatural features of the Standard Model, and the consequent implications for theory. This topic, pioneer…
Gravitational waves and black holes from the phase transition in models of dynamical symmetry breaking
Martín Arteaga, Anish Ghoshal, Alessandro Strumia
Theories of dynamical electroweak symmetry breaking predict a strong first order cosmological phase transition: we compute the resulting signals, primordial black holes and gravita…
Solving the strong CP problem without axions
Ferruccio Feruglio, Matteo Parriciatu, Alessandro Strumia +1
We formulate general conditions under which the strong CP problem is solved by spontaneous CP violation. Quark-mass matrix elements are polynomials in the CP-breaking order paramet…
Traversing a kinetic pole during inflation: primordial black holes and gravitational waves
Anish Ghoshal, Alessandro Strumia
We consider an inflationary kinetic function with an integrable pole that is traversed during inflation. This scenario leads to enhanced spectra of primordial scalar inhomogeneitie…
SN1987A and the Status of Oscillation Solutions to the Solar Neutrino Problem (including an appendix discussing the NC and day/night data from SNO)
M. Kachelriess, A. Strumia, R. Tomas +1
We study neutrino oscillations and the level-crossing probability PLZ in power-law potential profiles A(r)\propto r^n. We give local and global adiabaticity conditions valid for al…
Graviton loops and brane observables
R. Contino, L. Pilo, R. Rattazzi +1
We discuss how to consistently perform effective Lagrangian computations in quantum gravity with branes in compact extra dimensions. A reparametrization invariant and infrared fini…
Epsilon' from supersymmetry with non universal A terms?
R. Barbieri, R. Contino, A. Strumia
In supersymmetric theories with a motivated flavour structure, we investigate the possibility that an epsilon' parameter as large as the measured value be generated without conflic…
The Region of Validity of Homogeneous Nucleation Theory
A. Strumia, N. Tetradis, C. Wetterich
We examine the region of validity of Langer's picture of homogeneous nucleation. Our approach is based on a coarse-grained free energy that incorporates the effect of fluctuations…
Flavour in supersymmetric Grand Unification: a democratic approach
R. Barbieri, Z. Berezhiani, G. Dvali +2
We consider the flavour problem in a supersymmetric Grand Unified theory with gauged SU(6) group, where the Higgs doublets are understood as pseudo-Goldstone bosons of a larger $\S…