Article
Astronomy & Astrophysics
Mariana Carrillo Gonzalez, Qiuyue Liang, Jeremy Sakstein, Mark Trodden
Summary: The tension between measurements of the Hubble constant at different redshifts may indicate new physics at play in the early universe, potentially involving early dark energy and scalar field interactions with standard model neutrinos. A neutrino-assisted early dark energy model is proposed to explain the coincidence between different epochs, with detailed analysis and constraints needed for validation. This scenario opens up new avenues for testing using cosmological data sets.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Particles & Fields
Borna Salehian, Hong-Yi Zhang, Mustafa A. Amin, David Kaiser, Mohammad Hossein Namjoo
Summary: This paper systematically derives the SP equations and relativistic corrections from the nonlinear and fully relativistic KGE equations in an expanding universe, providing insights into deviations and applicability beyond the SP system. The method presented simplifies the analysis of scalar dark matter dynamics and accurately captures deviations from the SP system towards the full KGE case, particularly in calculating the mass-radius relationship of solitons.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Mar Bastero-Gil, Antonio Torres Manso
Summary: We present a supersymmetric extension of a unified model for inflation and Dark Matter, which is based on the incomplete decay of the inflaton field into right-handed neutrino pairs. By imposing a discrete interchange symmetry on the inflaton and right-handed neutrinos, stability of the inflaton field at the global minimum is ensured, while still allowing partial decay and reheating of the Universe. Compatibility with inflationary predictions, BBN bounds, and obtaining the right DM abundance typically requires large couplings to the neutrino sector.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Logan Morrison, Stefano Profumo, Dean J. Robinson
Summary: The study discusses a dark QCD sector as a minimal extension of the Standard Model, which includes Dark Matter candidates without the need for additional interactions with the visible sector. Under specific conditions, this dark sector can generate Dark Matter candidates.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Yann Mambrini, Keith A. Olive, Jiaming Zheng
Summary: Dark matter may only interact with the visible sector at high energy scales. During the period of reheating, the dominant process of dark matter production is through the decay products of the inflaton. This process dominates for low reheating temperatures and can produce the required density of dark matter.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Wasif Husain, Anthony W. Thomas
Summary: This study examines neutron star models with dark matter in the core, investigating properties of different types of dark matter particles and their interactions. Constraints on mass, radius, and tidal deformability are considered, along with the distribution of energy density inside the stars. The presence and behavior of fermionic dark matter throughout the star is particularly noted.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Particles & Fields
Kento Asai, Shohei Okawa, Koji Tsumura
Summary: In this study, a simple Dirac fermion dark matter model in U(1)(L μ-L τ) theory was investigated, where a new light gauge boson X plays a crucial role in both dark matter physics and explaining the muon g-2 anomaly. By utilizing a large U(1)(L μ-L τ) charge, the observed dark matter relic density was realized without the need for a resonance effect of the X boson. Additionally, unique neutrino signatures from sub-GeV dark matter psi were predicted based on the mass spectrum.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Hassan Firouzjahi, Mohammad Ali Gorji, Shinji Mukohyama, Borna Salehian
Summary: The model introduces a scenario of vector dark matter production during inflation, where the quantum fluctuations of the inflaton field energy are used to explain the observed relic density of dark matter, which can be applicable to a wide range of parameters.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Seyong Kim, M. Laine
Summary: Recently, there have been questions regarding how kinetic equilibrium is maintained when freeze-out dynamics is pushed to low temperatures in the context of the scalar singlet dark matter model with a mass of 60 GeV. Langevin simulations are used to address the non-equilibrium momentum distribution of non-relativistic particles in a cosmological background. These simulations suggest that kinetic equilibrium is a good approximation down to temperatures around 1 GeV for scalar singlet masses below 60 GeV, with deviations appearing as a red-tilted spectrum. This confirms that a slightly larger coupling than in equilibrium is needed to obtain the correct abundance, reducing the annihilation cross section.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Particles & Fields
Iason Baldes, Yann Gouttenoire, Filippo Sala, Geraldine Servant
Summary: The study suggests that dark matter may be a composite state of a confining sector with an approximate scale symmetry, with interactions mediated by a pseudo-Goldstone boson. Supercooling of the confining phase transition in the early universe allows for dark matter masses up to 10^6 TeV. The precise parameter space compatible with all experimental constraints in this scenario can be tested partly by telescopes and entirely by gravitational waves.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Roberto A. Lineros, Mathias Pierre
Summary: The model explores the connection between Dark Matter and neutrinos by introducing new electroweakly charged states and imposing a discrete symmetry, generating a stable Dark Matter candidate. Numerical analysis shows that the model can reproduce neutrino masses, correct dark matter density, and viable dark matter masses. Direct and indirect detection signatures are explored, showing promising detection prospects with CTA, Darwin, and KM3Net, highlighting the complementarity between these observables.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
David Dunsky, Lawrence J. Hall, Keisuke Harigaya
Summary: The study investigates SU(2)_L x SU(2)_R x U(1)_(B-L) theories that incorporate the Higgs Parity mechanism, solving the strong CP problem and predicting three right-handed neutrinos. It introduces cosmologies where right-handed neutrinos are produced via different mechanisms and explores the parameter space where the lightest right-handed neutrino is dark matter and contributes to baryon asymmetry via leptogenesis. A theory of flavor is constructed to explain the lightness and stability of right-handed neutrino dark matter, while maintaining sufficient baryon asymmetry. The allowed parameter space can be probed by future colliders, lattice computations, and measurements of the neutrino mass hierarchy.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Takanori Sato, Fuminobu Takahashi, Masaki Yamada
Summary: This paper investigates the gravitational production of dark photon dark matter during inflation when dark photons acquire mass through the Higgs mechanism. The research reveals that the energy density spectrum of dark photons can have two peaks at intermediate and small scales. Dark photons can explain dark matter, but their current mass needs to fall within a specific range.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Particles & Fields
Christian Gross, Sotirios Karamitsos, Giacomo Landini, Alessandro Strumia
Summary: A new dark sector consisting of a pure non-abelian gauge theory can potentially serve as gravitational dark matter candidates through bound states with long lifetimes, especially when accidental symmetries of group-theoretical nature are present. These bound states can be viable dark matter candidates for certain energy scales greater than or similar to 10^10 GeV.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Bastian Diaz Saez, Patricio Escalona, Sebastian Norero, Alfonso Zerwekh
Summary: The model extends the Standard Model by including two gauge singlets, potentially forming a two-component dark matter model. The study focuses on relic abundance production via freeze-out and experimental constraints from invisible Higgs decay, dark matter relic abundance, and direct/indirect detection. Three viable regions of the parameter space were identified, with the model being sensitive to indirect searches.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
S. Ilic, N. Aghanim, C. Baccigalupi, J. R. Bermejo-Climent, G. Fabbian, L. Legrand, D. Paoletti, M. Ballardini, M. Archidiacono, M. Douspis, F. Finelli, K. Ganga, C. Hernandez-Monteagudo, M. Lattanzi, D. Marinucci, M. Migliaccio, C. Carbone, S. Casas, M. Martinelli, I. Tutusaus, P. Natoli, P. Ntelis, L. Pagano, L. Wenzl, A. Gruppuso, T. Kitching, M. Langer, N. Mauri, L. Patrizii, A. Renzi, G. Sirri, L. Stanco, M. Tenti, P. Vielzeuf, F. Lacasa, G. Polenta, V. Yankelevich, A. Blanchard, Z. Sakr, A. Pourtsidou, S. Camera, V. F. Cardone, M. Kilbinger, M. Kunz, K. Markovic, V. Pettorino, A. G. Sanchez, D. Sapone, A. Amara, N. Auricchio, R. Bender, C. Bodendorf, D. Bonino, E. Branchini, M. Brescia, J. Brinchmann, V. Capobianco, J. Carretero, F. J. Castander, M. Castellano, S. Cavuoti, A. Cimatti, R. Cledassou, G. Congedo, C. J. Conselice, L. Conversi, Y. Copin, L. Corcione, A. Costille, M. Cropper, A. Da Silva, H. Degaudenzi, F. Dubath, C. A. J. Duncan, X. Dupac, S. Dusini, A. Ealet, S. Farrens, P. Fosalba, M. Frailis, E. Franceschi, P. Franzetti, M. Fumana, B. Garilli, W. Gillard, B. Gillis, C. Giocoli, A. Grazian, F. Grupp, L. Guzzo, S. V. H. Haugan, H. Hoekstra, W. Holmes, F. Hormuth, P. Hudelot, K. Jahnke, S. Kermiche, A. Kiessling, R. Kohley, B. Kubik, M. Kuemmel, H. Kurki-Suonio, R. Laureijs, S. Ligori, P. B. Lilje, I. Lloro, O. Mansutti, O. Marggraf, F. Marulli, R. Massey, S. Maurogordato, M. Meneghetti, E. Merlin, G. Meylan, M. Moresco, B. Morin, L. Moscardini, E. Munari, S. M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, W. Percival, S. Pires, M. Poncet, L. Popa, L. Pozzetti, F. Raison, R. Rebolo, J. Rhodes, M. Roncarelli, E. Rossetti, R. Saglia, R. Scaramella, P. Schneider, A. Secroun, G. Seidel, S. Serrano, C. Sirignano, J. L. Starck, P. Tallada-Crespi, A. N. Taylor, I. Tereno, R. Toledo-Moreo, F. Torradeflot, E. A. Valentijn, L. Valenziano, G. A. Verdoes Kleijn, Y. Wang, N. Welikala, J. Weller, G. Zamorani, J. Zoubian, E. Medinaceli, S. Mei, C. Rosset, F. Sureau, T. Vassallo, A. Zacchei, S. Andreon, A. Balaguera-Antolinez, M. Baldi, S. Bardelli, A. Biviano, S. Borgani, E. Bozzo, C. Burigana, R. Cabanac, A. Cappi, C. S. Carvalho, G. Castignani, C. Colodro-Conde, J. Coupon, H. M. Courtois, J. Cuby, S. de la Torre, D. Di Ferdinando, H. Dole, M. Farina, P. G. Ferreira, P. Flose-Reimberg, S. Galeotta, G. Gozaliasl, J. Gracia-Carpio, E. Keihanen, C. C. Kirkpatrick, V. Lindholm, G. Mainetti, D. Maino, N. Martinet, M. Maturi, R. B. Metcalf, G. Morgante, C. Neissner, J. Nightingale, A. A. Nucita, D. Potter, G. Riccio, E. Romelli, M. Schirmer, M. Schultheis, V. Scottez, R. Teyssier, A. Tramacere, J. Valiviita, M. Viel, L. Whittaker, E. Zucca
Summary: This study presents forecasts for the joint analysis of Euclid and Cosmic Microwave Background (CMB) data, predicting the cosmological parameters of the standard cosmological model and its extensions. The addition of CMB data substantially impacts constraints for all cosmological parameters of the standard Λ-cold-dark-matter model, with improvements reaching up to a factor of ten. The results highlight the crucial importance of combining and cross-correlating Euclid probes with CMB data for cosmological constraints.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
S. Giardiello, M. Gerbino, L. Pagano, J. Errard, A. Gruppuso, H. Ishino, M. Lattanzi, P. Natoli, G. Patanchon, F. Piacentini, G. Pisano
Summary: This study investigates the impact of a specific class of instrumental systematics on the reconstruction of the B-mode power spectrum of the cosmic microwave background (CMB). The focus is on the non-ideal properties of the half-wave plate (HWP), which is a polarization modulator used in future CMB experiments. The effects of non-ideal HWP properties, such as transmittance, phase shift, and cross-polarization, are studied using a simulation pipeline adapted to the LiteBIRD mission. The systematic effects on the tensor-to-scalar ratio are quantified, and accuracy requirements for the measurements of HWP properties are derived.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
N. Krachmalnicoff, T. Matsumura, E. de la Hoz, S. Basak, A. Gruppuso, Y. Minami, C. Baccigalupi, E. Komatsu, E. Martinez-Gonzalez, P. Vielva, J. Aumont, R. Aurlien, S. Azzoni, A. J. Banday, R. B. Barreiro, N. Bartolo, M. Bersanelli, E. Calabrese, A. Carones, F. J. Casas, K. Cheung, Y. Chinone, F. Columbro, P. de Bernardis, P. Diego-Palazuelos, J. Errard, F. Finelli, U. Fuskeland, M. Galloway, R. T. Genova-Santos, M. Gerbino, T. Ghigna, S. Giardiello, E. Gjerlow, M. Hazumi, S. Henrot-Versille, T. Kisner, L. Lamagna, M. Lattanzi, F. Levrier, G. Luzzi, D. Maino, S. Masi, M. Migliaccio, L. Montier, G. Morgante, B. Mot, R. Nagata, F. Nati, P. Natoli, L. Pagano, A. Paiella, D. Paoletti, G. Patanchon, F. Piacentini, G. Polenta, D. Poletti, G. Puglisi, M. Remazeilles, J. Rubino-Martin, M. Sasaki, M. Shiraishi, G. Signorelli, S. Stever, A. Tartari, M. Tristram, M. Tsuji, L. Vacher, I. K. Wehus, M. Zannoni
Summary: We demonstrate the in-flight polarization angle calibration for the LiteBIRD strategic large class mission and assess its impact on the measurement of the tensor-to-scalar ratio parameter, r, using simulated data. Our calibration method relies on nulling the cross correlation of the polarized signal in each frequency channel. We find that angle miscalibration biases results obtained with parametric fitting methods but has less impact on algorithms that do not assume foreground properties. Both component separation algorithms result in unbiased estimation of the r parameter once the miscalibration angles are corrected. This work provides a robust framework for polarization experiments and offers insights for the design of future missions.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Sanjoy Mandal, O. G. Miranda, G. Sanchez Garcia, J. W. F. Valle, Xun-Jie Xu
Summary: The mediators of neutrino mass generation can provide valuable information about neutrino properties, such as mass scale, mass-ordering, and atmospheric octant. Studying the decays of Higgs triplet scalars can shed light on these aspects. Four-lepton signatures at high-energy colliders could be a potential discovery site for charged lepton flavor non-conservation.
Article
Physics, Particles & Fields
A. E. Carcamo Hernandez, Chandan Hati, Sergey Kovalenko, Jose W. F. Valle, Carlos A. Vaquera-Araujo
Summary: In this paper, we propose a Dark Matter (DM) model that achieves gauge coupling unification and matter parity through scotogenic neutrino mass generation. The key component of this model is the Majorana SU(3)(L)-octet leptons, which stabilize the DM particles and predict a plethora of new particles that can be observed in low-energy experiments.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Stefano Gariazzo, Martina Gerbino, Thejs Brinckmann, Massimiliano Lattanzi, Olga Mena, Thomas Schwetz, Shouvik Roy Choudhury, Katherine Freese, Steen Hannestad, Christoph A. Ternes, Mariam Tortola
Summary: The extraction of neutrino mass ordering is a major challenge in particle physics and cosmology. Recent claims regarding the preference for normal ordering of neutrino mass spectrum are investigated and no decisive evidence is found. The significance in favor of normal mass ordering is currently moderate, driven mostly by neutrino oscillation data.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Luca Caloni, Martina Gerbino, Massimiliano Lattanzi, Luca Visinelli
Summary: We constrain the coupling of thermally-produced axion-like particles with photons and gluons using data from the cosmic microwave background spectra and baryon acoustic oscillations. Our results provide the most stringent bounds on the axion-gluon coupling to date and offer predictions for future CMB-S4 missions.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Aditya Batra, Praveen Bharadwaj, Sanjoy Mandal, Rahul Srivastava, Jose W. F. Valle
Summary: The simplest linear seesaw mechanism can explain the new CDF-II W boson mass measurement. The model includes quasi-Dirac leptons and a second, leptophilic, scalar doublet to explain small neutrino masses. The proposal is consistent with multiple physics tests and restrictions.
Article
Physics, Applied
T. Hasebe, P. A. R. Ade, A. Adler, E. Allys, D. Alonso, K. Arnold, D. Auguste, J. Aumont, R. Aurlien, J. Austermann, S. Azzoni, C. Baccigalupi, A. J. Banday, R. Banerji, R. B. Barreiro, N. Bartolo, S. Basak, E. Battistelli, L. Bautista, J. Beall, D. Beck, S. Beckman, K. Benabed, J. Bermejo-Ballesteros, M. Bersanelli, J. Bonis, J. Borrill, F. Bouchet, F. Boulanger, S. Bounissou, M. Brilenkov, M. L. Brown, M. Bucher, E. Calabrese, M. Calvo, P. Campeti, A. Carones, F. J. Casas, A. Catalano, A. Challinor, V Chan, K. Cheung, Y. Chinone, J. Cliche, F. Columbro, W. Coulton, J. Cubas, A. Cukierman, D. Curtis, G. D'Alessandro, K. Dachlythra, P. de Bernardis, T. de Haan, E. de la Hoz, M. De Petris, S. Della Torre, C. Dickinson, P. Diego-Palazuelos, M. Dobbs, T. Dotani, D. Douillet, L. Duband, A. Ducout, S. Duff, J. M. Duval, K. Ebisawa, T. Elleflot, H. K. Eriksen, J. Errard, T. Essinger-Hileman, F. Finelli, R. Flauger, C. Franceschet, U. Fuskeland, S. Galli, M. Galloway, K. Ganga, J. R. Gao, R. T. Genova-Santos, M. Gerbino, M. Gervasi, T. Ghigna, S. Giardiello, E. Gjerlow, M. L. Gradziel, J. Grain, L. Grandsire, F. Grupp, A. Gruppuso, J. E. Gudmundsson, N. W. Halverson, J. Hamilton, P. Hargrave, M. Hasegawa, M. Hattori, M. Hazumi, S. Henrot-Versille, L. T. Hergt, D. Herman, D. Herranz, C. A. Hill, G. Hilton, E. Hivon, R. A. Hlozek, T. D. Hoang, A. L. Hornsby, Y. Hoshino, J. Hubmayr, K. Ichiki, T. Iida, H. Imada, K. Ishimura, H. Ishino, G. Jaehnig, M. Jones, T. Kaga, S. Kashima, N. Katayama, A. Kato, T. Kawasaki, R. Keskitalo, T. Kisner, Y. Kobayashi, N. Kogiso, A. Kogut, K. Kohri, E. Komatsu, K. Komatsu, K. Konishi, N. Krachmalnicoff, I Kreykenbohm, C. L. Kuo, A. Kushino, L. Lamagna, J. Lanen, G. Laquaniello, M. Lattanzi, A. T. Lee, C. Leloup, F. Levrier, E. Linder, T. Louis, G. Luzzi, J. Macias-Perez, T. Maciaszek, B. Maffei, D. Maino, M. Maki, S. Mandelli, M. Maris, E. Martinez-Gonzalez, S. Masi, M. Massa, S. Matarrese, F. T. Matsuda, T. Matsumura, L. Mele, A. Mennella, M. Migliaccio, Y. Minami, K. Mitsuda, A. Moggi, A. Monfardini, J. Montgomery, L. Montier, G. Morgante, B. Mot, Y. Murata, J. A. Murphy, M. Nagai, Y. Nagano, T. Nagasaki, R. Nagata, S. Nakamura, R. Nakano, T. Namikawa, F. Nati, P. Natoli, S. Nerval, T. Nishibori, H. Nishino, F. Noviello, C. O'Sullivan, K. Odagiri, H. Ogawa, S. Oguri, H. Ohsaki, I. S. Ohta, N. Okada, N. Okada, L. Pagano, A. Paiella, D. Paoletti, A. Passerini, G. Patanchon, V Pelgrim, J. Peloton, F. Piacentini, M. Piat, G. Pisano, G. Polenta, D. Poletti, T. Prouve, G. Puglisi, D. Rambaud, C. Raum, S. Realini, M. Reinecke, M. Remazeilles, A. Ritacco, G. Roudil, J. Rubino-Martin, M. Russell, H. Sakurai, Y. Sakurai, M. Sandri, M. Sasaki, G. Savini, D. Scott, J. Seibert, Y. Sekimoto, B. Sherwin, K. Shinozaki, M. Shiraishi, P. Shirron, G. Signorelli, G. Smecher, F. Spinella, S. Stever, R. Stompor, S. Sugiyama, R. Sullivan, A. Suzuki, J. Suzuki, T. L. Svalheim, E. Switzer, R. Takaku, H. Takakura, S. Takakura, Y. Takase, Y. Takeda, A. Tartari, D. Tavagnacco, A. Taylor, E. Taylor, Y. Terao, J. Thermeau, H. Thommesen, K. L. Thompson, B. Thorne, T. Toda, M. Tomasi, M. Tominaga, N. Trappe, M. Tristram, M. Tsuji, M. Tsujimoto, C. Tucker, J. Ullom, L. Vacher, G. Vermeulen, P. Vielva, F. Villa, M. Vissers, N. Vittorio, B. Wandelt, W. Wang, K. Watanuki, I. K. Wehus, J. Weller, B. Westbrook, J. Wilms, B. Winter, E. J. Wollack, N. Y. Yamasaki, T. Yoshida, J. Yumoto, A. Zacchei, M. Zannoni, A. Zonca
Summary: LiteBIRD is a future satellite mission aimed at observing the polarization of cosmic microwave background radiation to study the inflationary universe. The mission will use three telescopes equipped with transition-edge sensor bolometers. This study estimated the instrumental sensitivity of LiteBIRD based on its current design, taking into account the detector noise from optical loadings as well as thermal carrier and readout noise. The observational sensitivities for fifteen bands specifically designed for LiteBIRD telescopes were calculated assuming a certain observation time efficiency.
JOURNAL OF LOW TEMPERATURE PHYSICS
(2023)
Correction
Astronomy & Astrophysics
S. Giardiello, M. Gerbino, L. Pagano, J. Errard, A. Gruppuso, H. Ishino, M. Lattanzi, P. Natoli, G. Patanchon, F. Piacentini, G. Pisano
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
L. Caloni, S. Giardiello, M. Lembo, M. Gerbino, G. Gubitosi, M. Lattanzi, L. Pagano
Summary: We conducted a comprehensive study on the signatures of Lorentz violation in electrodynamics on the Cosmic Microwave Background (CMB) anisotropies. Using the minimal Standard Model Extension (SME) framework, we analyzed the effects generated by renormalizable operators, both CPT-odd and CPT-even. Constraints were placed on the relevant Lorentz-violating parameters using the latest CMB datasets. We obtained improved bounds on CPT-even coefficient and stronger limits on CPT-odd coefficients compared to previous CMB-based limits, providing the strongest constraints to date on CPT-violating coefficients in the minimal SME.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Computer Science, Artificial Intelligence
Mark Haring, Esten Ingar Grotli, Signe Riemer-Sorensen, Katrine Seel, Kristian Gaustad Hanssen
Summary: This article introduces a flexible method for the sparse identification of dynamical systems. The method alleviates the stringent requirements imposed by other methods, such as fixed sampling rates and full state measurements. The Levenberg-Marquardt algorithm is used to solve the identification problem, and a parallel computing form of the algorithm is presented to reduce the solving time. An efficient backward elimination strategy is also proposed to construct a lean system model.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Astronomy & Astrophysics
Anirban Majumdar, Dimitrios K. Papoulias, Rahul Srivastava, Jose W. F. Valle
Summary: Prompted by the recent Dresden-II reactor data, this study examines its implications for the determination of the weak mixing angle, focusing on the effect of the quenching function. The study also determines the resulting constraints on the unitarity of the neutrino mixing matrix, as well as on the most general type of nonstandard neutral-current neutrino interactions.
Article
Astronomy & Astrophysics
Sabya Sachi Chatterjee, O. G. Miranda, M. Tortola, J. W. F. Valle
Summary: This study explores the modification of neutrino appearance probabilities in oscillation experiments due to the effective nonunitarity of the lepton mixing matrix, which arises if neutrinos obtain mass through the exchange of lepton mediators. Furthermore, the potential of the European Spallation Source neutrino super-beam (ESSnuSB) experiment in constraining the associated new physics parameters is examined, as well as how the combination of DUNE and ESSnuSB can enhance the sensitivities on the nonunitarity parameters.
Article
Astronomy & Astrophysics
Andrea Addazi, Giulia Ricciardi, Simone Scarlatella, Rahul Srivastava, Jose W. F. Valle
Summary: Based on the recent data on neutral current flavor anomalies in B -> K-(*())l(+)l(-) decays, we reexamine their interpretation within the framework of an extended 331 gauge theory. By introducing two additional lepton species with novel 331 charges, while ensuring anomaly-free conditions, we obtain new results. Furthermore, we extend the model by including neutral fermions to account for small neutrino masses.
