Article
Astronomy & Astrophysics
Manuel Drees, Bardia Najjari
Summary: In this study, we focus on the spectrum of energetic particles originating from the decay of massive progenitors during thermalization, considering factors such as background temperature, IR cutoff, and the LPM effect. By solving the resulting integral equation numerically and constructing an accurate analytical fit of the solutions, we obtain precise results.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
C. Pallis
Summary: Novel realizations of Higgs inflation within Supergravity are presented, largely related to the presence of a pole of order two in the kinetic term of the inflaton field. By adjusting the coefficients in the associated superpotential, inflationary observables can be made compatible with current data, and the scale M of gauge-symmetry breaking may lie within the MSSM range.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Guillem Domenech, Misao Sasaki
Summary: This study focuses on the interaction between Fermi gas and scalar field in cosmology, exploring important results under the massless limit of the scalar field, including solutions induced by Yukawa interaction and decay of energy density as radiation. The research indicates that regardless of whether fermions are initially relativistic or non-relativistic, their energy densities decay into radiation.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Prolay Chanda, James Unwin
Summary: In this paper, the scenario in which Asymmetric Dark Matter (ADM) decouples from the Standard Model thermal bath during an early period of matter domination is explored. Model independent analysis and a specific example in the context of an elegant SO(10) implementation are presented and contrasted with conventional ADM models. The prospects for superheavy ADM in this setting are discussed in the concluding remarks.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Stefan Antusch, Kenneth Marschall, Francisco Torrenti
Summary: We investigate the post-inflationary dynamics of an inflaton coupled to multiple interacting daughter fields through quadratic-quadratic interactions. By simulating the system in 2+1-dimensional lattices, we observe that the energy transferred to the daughter field sector can exceed 50%, surpassing previous bounds for single daughter field models. Additionally, we find that scale-free interactions between daughter fields can trigger resonance processes and deplete more than 50% of the energy from the inflaton.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Thomas Biekoetter, Sven Heinemeyer, Jose Miguel No, Maria Olalla Olea-Romacho, Georg Weiglein
Summary: We analyze the thermal history of the 2HDM and find that the presence of vacuum trapping impedes a first-order electroweak phase transition in certain parameter regions. In the regions where the transition does occur, the parameter space for a detectable stochastic gravitational wave signal is constrained and will be well probed by the HL-LHC and measurements of the self-coupling of the Higgs boson at 125 GeV. The ILC has the ability to probe the majority of the 2HDM parameter space with high precision through measurements of the self-coupling.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Daniel Green, Yi Guo, Benjamin Wallisch
Summary: In this paper, the cosmological constraints on the couplings of axions and other pseudo-Nambu-Goldstone bosons to Standard Model fermions are revisited. The focus is on the couplings below the electroweak scale, and the calculation of the production rates is updated to eliminate unnecessary approximations. The study finds that the cosmological bounds on these interactions complement astrophysical constraints, such as those from supernova SN 1987A.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Amin Aboubrahim, Michael Klasen, Pran Nath
Summary: This study proposes a particle physics model to alleviate the Hubble tension through an out-of-equilibrium hidden sector coupled to the visible sector. By considering a feeble coupling between the two sectors and the correlated evolution of their temperatures, the relic density of dark matter is calculated. The non-equilibrium decay of a massive scalar contributes to weakening the Hubble tension.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Monika Lynker, Rolf Schimmrigk
Summary: There are two approaches to characterize the structure of inflation models: one is directly analyzing complexity measures of the theory, and the other is comparing the behavior of observables from different models. Numerical calculations can be used to study the behavior of observables, especially when they show scaling behavior. In models with nontrivial parameter spaces, we use an iterative procedure to determine if the exponent functions lead to scaling behavior. We find that modular inflation models can be characterized by simple scaling laws and the scaling exponents depend on varying energy scales.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Chong-Bin Chen, Jiro Soda
Summary: The study indicates that destabilization of standard slow-roll inflation commonly occurs in multi-scalar-gauge field inflationary scenarios.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Drees, B. Najjari
Summary: Long-lived particles are crucial in the universe and their decay processes have significant impacts on the development of the universe. In studying these processes, the consideration of coherence effects and the branching ratios of different particles are necessary.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Thomas Biekoetter, Sven Heinemeyer, Jose Miguel No, Maria Olalla Olea, Georg Weiglein
Summary: Extensions of the Higgs sector of the Standard Model can lead to a rich cosmological history around the electroweak scale, with the possibility of various phenomena such as non-restoration of electroweak symmetry or vacuum trapping. By focusing on the N2HDM of type II and considering theoretical and experimental constraints, scenarios of electroweak symmetry non-restoration, vacuum trapping, and first-order phase transition in the thermal history of the Universe are identified. Despite the presence of a global electroweak minimum in the scalar potential at zero temperature, the physical viability of the N2HDM parameter space is not guaranteed, emphasizing the importance of analyzing tunneling probability for reliable predictions of the Universe's thermal history.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Daniel G. Figueroa, Adrien Florio, Francisco Torrenti, Wessel Valkenburg
Summary: In this paper, lattice techniques for simulating scalar and gauge field dynamics in an expanding universe are comprehensively discussed. The discretization of field theories, numerical algorithms, and lattice formulations for interacting scalar fields and gauge theories are presented. Symplectic integrators with different accuracy levels are provided for each case, along with relevant observables and constraints. The article also introduces the theoretical basis for the CosmoLattice code, a MPI-based package for simulating the non-linear evolution of field theories in an expanding universe.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Gabriela Barenboim, Nikita Blinov, Albert Stebbins
Summary: The study suggests that the evolution of the universe before Big Bang Nucleosynthesis may have experienced an early phase of matter domination, leading to the growth of dark matter structures. Contrary to the assumptions of standard cosmology, the formation of dark matter structures occurs earlier than expected, with most dark matter being bound in microhalos.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Alberto Salvio
Summary: The article investigates the general effective field theory describing the interactions of a massless dark photon with all Standard Model particles. The thermal production rate, cosmological yield, and contribution to the effective number of neutrinos of the dark photon are calculated. These predictions meet current observational bounds and will be tested in future measurements.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
Daniel G. Figueroa, Erwin H. Tanin
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2019)
Article
Astronomy & Astrophysics
Daniel G. Figueroa, Erwin H. Tanin
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2019)
Article
Astronomy & Astrophysics
Chiara Caprini, Daniel G. Figueroa, Raphael Flauger, Germano Nardini, Marco Peloso, Mauro Pieroni, Angelo Ricciardone, Gianmassimo Tasinato
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2019)
Article
Physics, Particles & Fields
Daniel G. Figueroa, Adrien Florio, Mikhail Shaposhnikov
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Astronomy & Astrophysics
Pierre Auclair, Jose J. Blanco-Pillado, Daniel G. Figueroa, Alexander C. Jenkins, Marek Lewicki, Mairi Sakellariadou, Sotiris Sanidas, Lara Sousa, Daniele A. Steer, Jeremy M. Wachter, Sachiko Kuroyanagi
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2020)
Article
Astronomy & Astrophysics
Stefan Antusch, Daniel G. Figueroa, Kenneth Marschall, Francisco Torrenti
Article
Astronomy & Astrophysics
Daniel G. Figueroa, Adrien Florio, Francisco Torrenti, Wessel Valkenburg
Summary: In this paper, lattice techniques for simulating scalar and gauge field dynamics in an expanding universe are comprehensively discussed. The discretization of field theories, numerical algorithms, and lattice formulations for interacting scalar fields and gauge theories are presented. Symplectic integrators with different accuracy levels are provided for each case, along with relevant observables and constraints. The article also introduces the theoretical basis for the CosmoLattice code, a MPI-based package for simulating the non-linear evolution of field theories in an expanding universe.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Multidisciplinary
Daniel G. Figueroa, Sami Raatikainen, Syksy Rasanen, Eemeli Tomberg
Summary: In this study, quantum diffusion in ultraslow-roll inflation was considered by using the Delta N formalism to calculate the probability distribution of curvature perturbations during this phase. It was found that stochastic effects during ultraslow-roll inflation significantly increase the abundance of primordial black holes compared to Gaussian approximations.
PHYSICAL REVIEW LETTERS
(2021)
Review
Physics, Particles & Fields
Nancy Aggarwal, Odylio D. Aguiar, Andreas Bauswein, Giancarlo Cella, Sebastian Clesse, Adrian Michael Cruise, Valerie Domcke, Daniel G. Figueroa, Andrew Geraci, Maxim Goryachev, Hartmut Grote, Mark Hindmarsh, Francesco Muia, Nikhil Mukund, David Ottaway, Marco Peloso, Fernando Quevedo, Angelo Ricciardone, Jessica Steinlechner, Sebastian Steinlechner, Sichun Sun, Michael E. Tobar, Francisco Torrenti, Caner Unal, Graham White
Summary: The white paper outlines the challenges and gains expected in gravitational-wave searches, focusing on Ultra High-Frequency Gravitational Waves (UHF-GWs). The absence of known astrophysical sources in the UHF-GWs frequency range provides a unique opportunity to discover physics beyond the Standard Model. The report is a summary of a workshop held at ICTP Trieste, Italy, which set the stage for the Ultra-High-Frequency Gravitational Wave (UHF-GW) initiative.
LIVING REVIEWS IN RELATIVITY
(2021)
Article
Astronomy & Astrophysics
Daniel G. Figueroa, Sami Raatikainen, Syksy Rasanen, Eemeli Tomberg
Summary: This study investigates the impact of stochastic noise on the generation of primordial black hole seeds in ultra-slow-roll inflation. By considering the non-linearity of the system and the dependence of noise on inflaton perturbations, the study captures the non-Markovian nature of the dynamics. The results show that stochastic effects can significantly enhance the abundance of primordial black holes.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Nicola Bartolo, Daniele Bertacca, Robert Caldwell, Carlo R. Contaldi, Giulia Cusin, Valerio De Luca, Emanuela Dimastrogiovanni, Matteo Fasiello, Daniel G. Figueroa, Gabriele Franciolini, Alexander C. Jenkins, Marco Peloso, Mauro Pieroni, Arianna Renzini, Angelo Ricciardone, Antonio Riotto, Mairi Sakellariadou, Lorenzo Sorbo, Gianmassimo Tasinato, Jesus Torrado, Sebastien Clesse, Sachiko Kuroyanagi
Summary: We investigate the sensitivity of the Laser Interferometer Space Antenna (LISA) to the anisotropies of the Stochastic Gravitational Wave Background (SGWB). By building a Signal-to-Noise estimator and performing a Fisher matrix analysis, we quantify the detectability of different multipoles by LISA. This study provides important information for understanding the origin of the SGWB and discriminating among different superimposed SGWB sources.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Catarina Cosme, Daniel G. Figueroa, Nicolas Loayza
Summary: This study investigates the production of gravitational waves during preheating with monomial/polynomial inflationary potentials. The research finds that a large trilinear coupling leads to the exponential production of particles and generates a significant stochastic gravitational wave background. Although these backgrounds cannot be detected at high frequencies by current/planned GW observatories, the amount of gravitational waves produced is remarkable.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Review
Physics, Particles & Fields
Pierre Auclair, David Bacon, Tessa Baker, Tiago Barreiro, Nicola Bartolo, Enis Belgacem, Nicola Bellomo, Ido Ben-Dayan, Daniele Bertacca, Marc Besancon, Jose J. Blanco-Pillado, Diego Blas, Guillaume Boileau, Gianluca Calcagni, Robert Caldwell, Chiara Caprini, Carmelita Carbone, Chia-Feng Chang, Hsin-Yu Chen, Nelson Christensen, Sebastien Clesse, Denis Comelli, Giuseppe Congedo, Carlo Contaldi, Marco Crisostomi, Djuna Croon, Yanou Cui, Giulia Cusin, Daniel Cutting, Charles Dalang, Valerio De Luca, Walter Del Pozzo, Vincent Desjacques, Emanuela Dimastrogiovanni, Glauber C. Dorsch, Jose Maria Ezquiaga, Matteo Fasiello, Daniel G. Figueroa, Raphael Flauger, Gabriele Franciolini, Noemi Frusciante, Jacopo Fumagalli, Juan Garcia-Bellido, Oliver Gould, Daniel Holz, Laura Iacconi, Rajeev Kumar Jain, Alexander C. Jenkins, Ryusuke Jinno, Cristian Joana, Nikolaos Karnesis, Thomas Konstandin, Kazuya Koyama, Jonathan Kozaczuk, Sachiko Kuroyanagi, Danny Laghi, Marek Lewicki, Lucas Lombriser, Eric Madge, Michele Maggiore, Ameek Malhotra, Michele Mancarella, Vuk Mandic, Alberto Mangiagli, Sabino Matarrese, Anupam Mazumdar, Suvodip Mukherjee, Ilia Musco, Germano Nardini, Jose Miguel No, Theodoros Papanikolaou, Marco Peloso, Mauro Pieroni, Luigi Pilo, Alvise Raccanelli, Sebastien Renaux-Petel, Arianna I. Renzini, Angelo Ricciardone, Antonio Riotto, Joseph D. Romano, Rocco Rollo, Alberto Roper Pol, Ester Ruiz Morales, Mairi Sakellariadou, Ippocratis D. Saltas, Marco Scalisi, Kai Schmitz, Pedro Schwaller, Olga Sergijenko, Geraldine Servant, Peera Simakachorn, Lorenzo Sorbo, Lara Sousa, Lorenzo Speri, Daniele A. Steer, Nicola Tamanini, Gianmassimo Tasinato, Jesus Torrado, Caner Unal, Vincent Vennin, Daniele Vernieri, Filippo Vernizzi, Marta Volonteri, Jeremy M. Wachter, David Wands, Lukas T. Witkowski, Miguel Zumalacarregui, James Annis, Feanor Reuben Ares, Pedro P. Avelino, Anastasios Avgoustidis, Enrico Barausse, Alexander Bonilla, Camille Bonvin, Pasquale Bosso, Matteo Calabrese, Mesut Caliskan, Jose A. R. Cembranos, Mikael Chala, David Chernoff, Katy Clough, Alexander Criswell, Saurya Das, Antonio da Silva, Pratika Dayal, Valerie Domcke, Ruth Durrer, Richard Easther, Stephanie Escoffier, Sandrine Ferrans, Chris Fryer, Jonathan Gair, Chris Gordon, Martin Hendry, Mark Hindmarsh, Deanna C. Hooper, Eric Kajfasz, Joachim Kopp, Savvas M. Koushiappas, Utkarsh Kumar, Martin Kunz, Macarena Lagos, Marc Lilley, Joanes Lizarraga, Francisco S. N. Lobo, Azadeh Maleknejad, C. J. A. P. Martins, P. Daniel Meerburg, Renate Meyer, Jose Pedro Mimoso, Savvas Nesseris, Nelson Nunes, Vasilis Oikonomou, Giorgio Orlando, Ogan Ozsoy, Fabio Pacucci, Antonella Palmese, Antoine Petiteau, Lucas Pinol, Simon Portegies Zwart, Geraint Pratten, Tomislav Prokopec, John Quenby, Saeed Rastgoo, Diederik Roest, Kari Rummukainen, Carlo Schimd, Aurelia Secroun, Alberto Sesana, Carlos F. Sopuerta, Ismael Tereno, Andrew Tolley, Jon Urrestilla, Elias C. Vagenas, Jorinde van de Vis, Rien van de Weygaert, Barry Wardell, David J. Weir, Graham White, Bogumila Swiezewska, Valery I. Zhdanov
Summary: This publication provides an overview of the latest advancements in LISA cosmology, including theory and methods, and identifies new opportunities to probe the universe using gravitational-wave observations by LISA.
LIVING REVIEWS IN RELATIVITY
(2023)
Article
Astronomy & Astrophysics
Daniel G. Figueroa, Adrien Florio, Nicolas Loayza, Mauro Pieroni
Summary: This paper discusses the possibility of measuring particle couplings using stochastic gravitational wave backgrounds (SGWBs). It is found that a sequence of stair-like peaks, with each peak probing a different coupling, can emerge in the SGWB spectrum. By detecting this signature, it is possible to reconstruct the couplings of the particle species involved in high energy phenomena that generate SGWBs. Stair-like signatures may arise in causally produced backgrounds in the early Universe.
Article
Astronomy & Astrophysics
Stefan Antusch, Daniel G. Figueroa, Kenneth Marschall, Francisco Torrenti
Summary: We studied the evolution of the energy distribution and equation of state in the Universe from the end of inflation until the onset of radiation or matter domination. By using analytical techniques and lattice simulations, we found that the system transitions to different domination states depending on the potential of the inflaton. We were able to accurately predict inflationary observables based on the number of e-foldings until radiation domination.