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1. Full Text Symmetries and consistency relations in the large scale structure of the universe
by Kehagias, A and Riotto, A
Nuclear Physics, Section B, ISSN 0550-3213, 08/2013, Volume 873, Issue 3, pp. 514 - 529
We study the symmetries enjoyed by the Newtonian equations of motion of the non-relativistic dark matter fluid coupled to gravity which give rise to the... 
OPERATOR PRODUCT EXPANSION | LOOP CORRECTIONS | INFLATION | PHYSICS, PARTICLES & FIELDS
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2. Full Text The Halo Mass Function from Excursion Set Theory. III. Non-Gaussian Fluctuations
by Maggiore, Michele and Riotto, Antonio
The Astrophysical Journal, ISSN 0004-637X, 07/2010, Volume 717, Issue 1, pp. 526 - 541
We compute the effect of primordial non-Gaussianity on the halo mass function, using excursion set theory. In the presence of non-Gaussianity, the stochastic... 
Large-scale structure of universe | Cosmology: theory | EVOLUTION | PRIMORDIAL NON-GAUSSIANITY | CLUSTERS | COLLAPSE | BIAS | ASTRONOMY & ASTROPHYSICS | GALAXIES | SIMULATIONS | large-scale structure of universe | PROBE | cosmology: theory | ABUNDANCE | VARIATIONS | STOCHASTIC PROCESSES | MARKOV PROCESS | MATHEMATICAL EVOLUTION | FUNCTIONS | SIMULATION | MATHEMATICS | COSMOLOGY | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | FLUCTUATIONS | MASS | SET THEORY | UNIVERSE | MATHEMATICAL METHODS AND COMPUTING
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3. Full Text Clockwork inflation
by Kehagias, Alex and Riotto, Antonio
Physics Letters B, ISSN 0370-2693, 04/2017, Volume 767, Issue C, pp. 73 - 80
We investigate the recently proposed clockwork mechanism delivering light degrees of freedom with suppressed interactions and show, with various examples, that... 
PHYSICS, NUCLEAR | MODELS | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | Inflation (Finance) | Analysis | General Relativity and Quantum Cosmology | High Energy Physics - Phenomenology | Nuclear and High Energy Physics | High Energy Physics - Theory | Physics | Astrophysics - Cosmology and Nongalactic Astrophysics
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4. Full Text Remarks on the Starobinsky model of inflation and its descendants
by Kehagias, Alexandros and Moradinezhad Dizgah, Azadeh and Riotto, Antonio
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 1550-7998, 02/2014, Volume 89, Issue 4
We point out that the ability of some models of inflation, such as the Higgs inflation and the universal attractor models at large values of the coupling xi,... 
GRAVITY | HIGHER-DERIVATIVE SUPERGRAVITY | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS
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5. Full Text Operator product expansion of inflationary correlators and conformal symmetry of de Sitter
by Kehagias, A and Riotto, A
Nuclear Physics, Section B, ISSN 0550-3213, 11/2012, Volume 864, Issue 3, pp. 492 - 529
We study the multifield inflationary models where the cosmological perturbation is sourced by light scalar fields other than the inflaton. The corresponding... 
Conformal field theory | Inflation | Operator product expansion | Suyama–Yamaguchi inequality | Curvaton | Non-Gaussianities | Suyama-Yamaguchi inequality | RENORMALIZATION-GROUP | FIELD-THEORY | DENSITY PERTURBATIONS | MODELS | FLUCTUATIONS | LOGARITHMIC OPERATORS | UNIVERSE | PHYSICS, PARTICLES & FIELDS | Inflation (Finance) | Universities and colleges
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6. Full Text A Note on Inflation and the Swampland
by Kehagias, A and Riotto, A
Fortschritte der Physik, ISSN 0015-8208, 10/2018, Volume 66, Issue 10, pp. 1800052 - n/a
We provide some comments about the constraints on the inflationary models inferred from the two Swampland criteria which have been recently proposed. In... 
Swampland | Inflation | PERTURBATIONS | PHYSICS, MULTIDISCIPLINARY | Inflation (Finance) | Analysis
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7. Full Text Enhancing inflationary tensor modes through spectator fields
by Biagetti, Matteo and Fasiello, Matteo and Riotto, Antonio
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 1550-7998, 11/2013, Volume 88, Issue 10
We show that a large contribution to tensor modes during inflation can be generated by a spectator scalar field with a speed of sound lower than unity. 
GRAVITATIONAL-RADIATION | GRAVITY-WAVES | POLARIZATION | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS
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8. Full Text Possible cosmological explanation of why supersymmetry is hiding at the LHC
by Riotto, Antonio
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 1550-7998, 12/2012, Volume 86, Issue 12
If one is not ready to pay a large fine-tuning price within supersymmetric models given the current measurement of the Higgs boson mass, one can envisage a... 
ASTRONOMY & ASTROPHYSICS | MASS | PHYSICS, PARTICLES & FIELDS
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9. Full Text The Halo Mass Function from Excursion Set Theory. I. Gaussian Fluctuations with Non-Markovian Dependence on the Smoothing Scale
by Maggiore, Michele and Riotto, Antonio
The Astrophysical Journal, ISSN 0004-637X, 03/2010, Volume 711, Issue 2, pp. 907 - 927
A classic method for computing the mass function of dark matter halos is provided by excursion set theory, where density perturbations evolve stochastically... 
Dark matter | Large-scale structure of universe | Cosmology: theory | UNIVERSALITY | INITIAL CONDITIONS | DARK-MATTER HALOES | cosmology: theory | ABUNDANCE | EVOLUTION | CLUSTERS | MODELS | RANDOM-WALKS | ASTRONOMY & ASTROPHYSICS | 1ST PASSAGE TIME | GALAXIES | large-scale structure of universe | dark matter | RANDOMNESS | MATTER | STOCHASTIC PROCESSES | MARKOV PROCESS | CALCULATION METHODS | GALACTIC EVOLUTION | FUNCTIONS | BOUNDARY CONDITIONS | GRAPH THEORY | INTEGRALS | MATHEMATICS | PROBABILITY | COSMOLOGY | NONLUMINOUS MATTER | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | MASS | PERTURBATION THEORY | PATH INTEGRALS | SET THEORY | COORDINATES | UNIVERSE | MATHEMATICAL METHODS AND COMPUTING
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10. Full Text Gauge-invariant temperature anisotropies and primordial non-gaussianity
by Bartolo, Nicola and Matarrese, Sabino and Riotto, Antonio
Physical Review Letters, ISSN 0031-9007, 12/2004, Volume 93, Issue 23, p. 231301
We provide the gauge-invariant expression for large-scale cosmic microwave background temperature fluctuations at second-order perturbation theory. This... 
COSMOLOGICAL PERTURBATIONS | PHYSICS, MULTIDISCIPLINARY | GRAVITATIONAL PERTURBATIONS
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11. Full Text The clock work supergravity
by Kehagias, A and Riotto, A
JOURNAL OF HIGH ENERGY PHYSICS, ISSN 1029-8479, 02/2018, Issue 2
We show that the minimal D = 5, N = 2 gauged supergravity set-up may encode naturally the recently proposed clockwork mechanism. The minimal embedding requires... 
5 DIMENSIONS | BREAKING | p-branes | SUPERSYMMETRY | Supergravity Models | COSMOLOGICAL CONSTANT | DOMAIN-WALLS | N=2 SUPERGRAVITY | GAUGED SUPERGRAVITY | CALABI-YAU THREEFOLDS | JORDAN ALGEBRAS | MAXWELL-EINSTEIN SUPERGRAVITY | PHYSICS, PARTICLES & FIELDS
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12. Full Text On the inflationary perturbations of massive higher-spin fields
by Kehagias, Alex and Riotto, Antonio
Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, 2017, Volume 2017, Issue 7, pp. 46 - 46
Cosmological perturbations of massive higher-spin fields are generated during inflation, but they decay on scales larger than the Hubble radius as a... 
primordial magnetic fields | cosmological perturbation theory | inflation | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | PHYSICS OF ELEMENTARY PARTICLES AND FIELDS | DISTURBANCES | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | DECAY | COSMOLOGICAL MODELS | PERTURBATION THEORY | INFLATONS | COUPLING | INFLATIONARY UNIVERSE
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13. Full Text On the validity of the effective field theory for dark matter searches at the LHC
by Busoni, Giorgio and De Simone, Andrea and Morgante, Enrico and Riotto, Antonio
Physics Letters B, ISSN 0370-2693, 01/2014, Volume 728, pp. 412 - 421
We discuss the limitations to the use of the effective field theory approach to study dark matter at the LHC. We introduce and study a few quantities, some of... 
CONSTRAINTS | PHYSICS, NUCLEAR | ASTRONOMY & ASTROPHYSICS | PHYSICS, PARTICLES & FIELDS | Operators | Error analysis | Momentum transfer | Dark matter | Elementary particles | Field theory | Joining | Criteria | Large Hadron Collider | High Energy Physics - Phenomenology | Astrophysics | High Energy Physics - Experiment | Cosmology and Extragalactic Astrophysics | Nuclear and High Energy Physics
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14. Full Text Liberated N = 1 supergravity
by Farakos, Fotis and Kehagias, Alex and Riotto, Antonio
Journal of High Energy Physics, ISSN 1126-6708, 06/2018, Volume 2018, Issue 6, pp. 1 - 27
We discuss a new interaction for chiral models in four-dimensional N = 1 supergavity. It contains a new arbitrary function in addition to the Kahler potential... 
Superspaces | Supersymmetry Breaking | Supergravity Models | Supersymmetric Effective Theories | SUPERSYMMETRY | MODELS | Supersyrnmetry Breaking | COUPLINGS | FORMULATION | VACUA | Supersynanetric Effective Theories | PHYSICS, PARTICLES & FIELDS | Supersymmetry | Supergravity
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15. Full Text The four-point correlator in multifield inflation, the operator product expansion and the symmetries of de Sitter
by Kehagias, A and Riotto, A
Nuclear Physics, Section B, ISSN 0550-3213, 03/2013, Volume 868, Issue 3, pp. 577 - 595
We study the multifield inflationary models where the cosmological perturbation is sourced by light scalar fields other than the inflaton. We exploit the... 
PERTURBATIONS | NON-GAUSSIANITY | RENORMALIZATION GROUP | PHYSICS, PARTICLES & FIELDS | Inflation (Finance)
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16. Full Text Primordial black holes from Higgs vacuum instability: avoiding fine-tuning through an ultraviolet safe mechanism
by Espinosa, J R and Racco, D and Riotto, A
The European Physical Journal C, ISSN 1434-6044, 10/2018, Volume 78, Issue 10, pp. 1 - 5
We have recently proposed the idea that dark matter in our universe is formed by primordial black holes generated by Standard Model Higgs fluctuations during... 
Nuclear Physics, Heavy Ions, Hadrons | Measurement Science and Instrumentation | Nuclear Energy | Quantum Field Theories, String Theory | Physics | Elementary Particles, Quantum Field Theory | Astronomy, Astrophysics and Cosmology | STANDARD MODEL | BOUNDS | STABILITY | ELECTROWEAK VACUUM | MASS | PHYSICS, PARTICLES & FIELDS | Advertising executives | Inflation (Finance) | Radiation, Background | Analysis | Dark matter (Astronomy) | Standard model (particle physics) | Economic models | Stability | Dark matter | Black holes | Variations | Universe | Tuning | Letter
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17. Full Text On the Starobinsky model of inflation from supergravity
by Farakos, F and Kehagias, A and Riotto, A
Nuclear Physics, Section B, ISSN 0550-3213, 11/2013, Volume 876, Issue 1, pp. 187 - 200
We discuss how the higher-derivative Starobinsky model of inflation originates from supergravity. It is known that, in the old-minimal supergravity description... 
Starobinsky model | Supergravity | Inflation | HIGHER-DERIVATIVE SUPERGRAVITY | MULTIPLETS | TENSOR CALCULUS | PHYSICS, PARTICLES & FIELDS | Inflation (Finance)
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18. Full Text The Selfish Higgs
by Giudice, G.F and Kehagias, A and Riotto, A
Journal of High Energy Physics, ISSN 1029-8479, 10/2019, Volume 2019, Issue 10, pp. 1 - 19
We propose a mechanism to solve the Higgs naturalness problem through a cosmological selection process. The discharging of excited field configurations through... 
Quantum Physics | Cosmology of Theories beyond the SM | Quantum Field Theories, String Theory | Effective Field Theories | Classical and Quantum Gravitation, Relativity Theory | Higgs Physics | Physics | Elementary Particles, Quantum Field Theory | Cosmological constant | Nucleation
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19. Full Text On cosmic acceleration without dark energy
by Kolb, Edward W and Matarrese, Sabino and Riotto, Antonio
New Journal of Physics, ISSN 1367-2630, 12/2006, Volume 8, Issue 12, pp. 322 - 322
We elaborate on the proposal that the observed acceleration of the Universe is the result of the backreaction of cosmological perturbations, rather than the... 
GENERAL-RELATIVITY | COSMOLOGICAL CONSTANT | PHYSICS, MULTIDISCIPLINARY | EXPANSION | INHOMOGENEOUS FLUIDS | TURBULENCE | HAMILTON-JACOBI EQUATION | ZELDOVICH APPROXIMATION | AVERAGE PROPERTIES | SUPERNOVAE | UNIVERSE
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20. Full Text Remarks about the tensor mode detection by the BICEP2 Collaboration and the super-Planckian excursions of the inflaton field
by Kehagias, A and Riotto, A
Physical Review D - Particles, Fields, Gravitation and Cosmology, ISSN 1550-7998, 05/2014, Volume 89, Issue 10
The recent detection by the BICEP2 Collaboration of a high level of tensor modes has relevant implications which we briefly discuss in this short note. In... 
ASTRONOMY & ASTROPHYSICS | PERTURBATIONS | PHYSICS, PARTICLES & FIELDS
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