Article
Physics, Particles & Fields
Giacomo Cacciapaglia, Martin Rosenlyst
Summary: The model presents a composite scotogenic model for neutrino masses, generated through loops of DOUBLE-STRUCK CAPITAL Z(2)-odd composite scalars and considering three different approaches to the couplings between neutrinos and the composite sector. If the masses of the three DOUBLE-STRUCK CAPITAL Z(2)-odd right-handed neutrinos are between the TeV and Planck scales, the model can have sizable couplings and remain viable with respect to various experimental constraints. Additionally, the lightest DOUBLE-STRUCK CAPITAL Z(2)-odd composite scalar may serve as Dark Matter via thermal freeze-out or as an asymmetric relic, featured in various models based on vacuum misalignment.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Yong Du, Hao-Lin Li, Jian Tang, Sampsa Vihonen, Jiang-Hao Yu
Summary: The SMEFT framework provides a systematic way to study neutrino non-standard interactions, with ongoing neutrino oscillation experiments playing a key role in constraining these interactions. Research shows that neutrino experiments can be sensitive to new physics at around 20 TeV, highlighting the importance of studying different SMEFT operators in understanding neutrino interactions.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Rupert Coy, Michele Frigerio
Summary: New physics in the lepton sector has implications for neutrino masses, electroweak precision observables, charged-lepton flavor violation, and dipole moments. Effective field theory is a convenient formalism for comparing low-energy predictions of different models. By deriving the Wilson coefficients for representative models and considering various lepton observables, it becomes straightforward to understand the allowed parameter space for each model and discriminate between them. The Zee and leptoquark models are particularly relevant for explaining the muon g-2 anomaly.
Article
Physics, Particles & Fields
Yong Du, Jiang-Hao Yu
Summary: The study precisely calculates the number of relativistic species, N-eff, in the standard model and predicts it will be measured to the percent level by CMB-S4 in the future. Neutral-current non-standard interactions are found to impact neutrino decoupling in the early Universe, subsequently modifying N-eff. The results provide a comprehensive analysis of the dimension-7 parameterized operators in effective field theory framework and offer a stringent constraint on the dimension-6 vector-type neutrino-electron operator's scale.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Daniel Elander, Ali Fatemiabhari, Maurizio Piai
Summary: We study a holographic description in this paper which explains the spontaneous breaking of an approximate SO(5) global symmetry to its SO(4) subgroup in a field theory. By analyzing the spectrum of small fluctuations of the bulk fields, we find some important results, including the heavy mass of pseudo-Nambu-Goldstone bosons(PNGBs) and the existence of a specific region in parameter space when the dimension of the field theory operator causing SO(5) breaking is close to half the space-time dimensionality. These findings are significant for model building in the context of composite Higgs.
Article
Physics, Particles & Fields
Shun Zhou
Summary: In the minimal seesaw model, the effective dimension-five neutrino mass operator's one-loop matching condition can make a significant contribution to the smallest neutrino mass, due to the introduction of only two heavy right-handed neutrinos. By using the one-loop matching condition and two-loop renormalization group equations in the supersymmetric version of the minimal seesaw model, the smallest neutrino mass is explicitly calculated for normal neutrino mass ordering, resulting in m(1) in the range of [10^(-10), 10^(-8)] eV at the Fermi scale. The uncertainty in the choice of the seesaw scale and relevant input parameters at that scale contribute to the range of m(1).
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Yong Du, Xu-Xiang Li, Jiang-Hao Yu
Summary: This article investigates the one-loop matching of type-I, -II, and -III seesaw models using the functional method and presents the results in both Green's and Warsaw bases. Although these models generate the same dimension-5 Weinberg operator, they can induce different types of dimension-6 effective operators that can be used for model discrimination. The study also finds significant threshold effects from one-loop matching, which allow for electroweak symmetry breaking radiatively in type-II seesaw but forbid it in type-I/-III models. An analytical criterion for such radiative symmetry breaking in type-II seesaw is derived. Furthermore, the indirect signatures from different types of dimension-6 operators at high-energy colliders, low-energy precision experiments, and forward physics facilities are investigated for model discrimination.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Di Zhang, Shun Zhou
Summary: In this paper, the complete one-loop matching of the Type-I seesaw model onto the Standard Model Effective Field Theory (SMEFT) is accomplished, resulting in 31 dimension-six operators in the Warsaw basis of the SMEFT. The Wilson coefficients of these operators are computed up to O(M-2), where M is the mass scale of heavy Majorana neutrinos. The effects of heavy Majorana neutrinos on low-energy phenomenology are explored through this one-loop matching, along with discussions on threshold corrections in the Standard Model and the coefficient of the dimension-five operator.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
John Ellis, Maeve Madigan, Ken Mimasu, Veronica Sanz, Tevong You
Summary: The search for effective field theory deformations of the Standard Model is conducted through a global approach in the framework of the Standard Model Effective Field Theory. The analysis includes constraints on the coefficients of SMEFT operators and explores specific ultra-violet completions of the Standard Model, but does not find significant evidence for physics beyond the Standard Model.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Upalaparna Banerjee, Joydeep Chakrabortty, Suraj Prakash, Shakeel Ur Rahaman, Michael Spannowsky
Summary: The BSMEFT is a theoretical framework constructed when the physics spectrum beyond the SM is non-degenerate, including additional IR degrees of freedom. Constructing a BSMEFT is usually the first step after experimental evidence for a new particle is established. This paper provides BSMEFT models and their EFT Lagrangian for three different scenarios.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
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
Astronomy & Astrophysics
A. Doff
Summary: The possibility that the Higgs boson is a composite dilaton is discussed in this paper, and evidence supporting this hypothesis is provided by verifying the behavior of the potential function. This is of great significance for understanding the nature of the Higgs boson and advancing the field of particle physics.
Article
Physics, Particles & Fields
F. J. Escrihuela, L. J. Flores, O. G. Miranda, Javier Rendon
Summary: The study focuses on generalized neutrino interactions for various neutrino processes and constrains scalar, pseudoscalar, and tensor new physics effective couplings through a global analysis. It presents individual constraints for each effective parameter and shows robust results for the restrictions on the different GNI parameters, improving some of these bounds.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
H. Bonet, A. Bonhomme, C. Buck, K. Fuelber, J. Hakenmueller, G. Heusser, T. Hugle, M. Lindner, W. Maneschg, T. Rink, H. Strecker, R. Wink
Summary: The measurements from the coherent elastic neutrino-nucleus scattering (CE nu NS) experiments have opened up possibilities to study neutrino physics beyond the standard model. This paper presents constraints on non-standard interactions (NSIs) and mediators derived from CONUS germanium data. The study found that the CONUS experiment has set the world's best limits on tensor NSIs and has the potential to probe coupling constants for scalar and vector mediators.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
L. Allwicher, D. A. Faroughy, F. Jaffredo, O. Sumensari, F. Wilsch
Summary: We investigate the high-pT tails of the pp -> lv and pp -> ll Drell-Yan processes as probes of New Physics in semileptonic interactions. We provide a general decomposition of the 2 -> 2 scattering amplitudes and derive constraints on Wilson coefficients for semileptonic four-fermion and dipole operators as well as leptoquark models using the latest LHC run-II data. Our results highlight the complementarity between high-pT processes, electroweak pole measurements, and low-energy flavor data.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Alfredo Glioti, Riccardo Rattazzi, Luca Vecchi
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Kaustubh Agashe, Peizhi Du, Majid Ekhterachian, Chee Sheng Fong, Sungwoo Hong, Luca Vecchi
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Javi Serra, Stefan Stelzl, Riccardo Torre, Andreas Weiler
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Physics, Particles & Fields
Maximilian Ruhdorfer, Javi Serra, Andreas Weiler
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Particles & Fields
Reuven Balkin, Javi Serra, Konstantin Springmann, Andreas Weiler
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Multidisciplinary
Gabriel Cuomo, Luca Vecchi, Andrea Wulzer
Article
Physics, Particles & Fields
Giovanni Banelli, Ennio Salvioni, Javi Serra, Tobias Theil, Andreas Weiler
Summary: This study demonstrates the potential of future proton-proton and electron-positron colliders to directly and indirectly test non-standard interactions involving top quarks. It also shows the impact on the parameter space of composite Higgs models and provides a consistent description of mild LHC excesses in multilepton plus jets final states within the framework of effective field theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Alessandro Valenti, Luca Vecchi
Summary: In this study, we analyze the Nelson-Barr approach to the Strong CP Problem, derive necessary conditions for reproducing the CKM phase and quark masses, and quantify irreducible contributions to the QCD topological angle. We discuss collider, electroweak, and flavor bounds, and find that most of the parameter space above the TeV scale is still allowed in models with down-type mediators.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Alessandro Valenti, Luca Vecchi
Summary: The solution of the Strong CP Problem is based on the spontaneous breaking of CP, requiring a non-generic structure to explain a coincidence between CP-even and CP-odd mass scales. This approach, utilizing gauge invariance and a CP-conserving physics at the Planck scale, predicts a dark sector with potential cosmological signatures.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Luca Vecchi
Summary: Composite axion scenarios provide a theoretical basis for the high-quality existence of the Peccei-Quinn symmetry, naturally embedded in Grand-Unified Theories, and leading to distinctive signatures at low energies, such as additional composite scalars and approximate unification of Standard Model gauge couplings.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Particles & Fields
Pietro Baratella, Dominik Haslehner, Maximilian Ruhdorfer, Javi Serra, Andreas Weiler
Summary: In this study, we investigate the renormalization group of generic effective field theories with gravity, using the on-shell amplitude approach. We introduce a modified helicity to simplify the extraction of anomalous dimensions and apply it to explain old and discover new non-renormalization theorems for theories involving gravitons. Furthermore, we provide complete results for the one-loop gravitational renormalization of a generic minimally coupled gauge theory and the renormalization of dimension-six operators with at least one graviton, up to four external particles.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Reuven Balkin, Javi Serra, Konstantin Springmann, Stefan Stelzl, Andreas Weiler
Summary: This study investigates the effects of finite density on the stability of metastable vacua in relaxion models. By analyzing nucleation seeds from stars and rotating neutron stars, we derive the conditions for the formation and runaway of relaxion bubbles with lower energy minima than in vacuum. The resulting late-time phase transition in the universe provides new constraints on the parameter space of relaxion models.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Alessandro Valenti, Luca Vecchi, Ling-Xiao Xu
Summary: We propose a model that addresses the strong CP problem by introducing a heavier axion than the standard one. In this model, the quarks of the Standard Model are embedded into a larger non-abelian Grand Color group that splits into ordinary QCD and additional confining dynamics. The model has a minimal field content and can be tested through collider experiments and cosmological observations.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Francesco Serra, Javi Serra, Enrico Trincherini, Leonardo G. Trombetta
Summary: Causality constraints on scalar-tensor theories involving black holes suggest that within the effective field theory regime, the unobservability of time advancement necessitates a cutoff length approximately the size of the inverse Schwarzschild radius of the black holes. For astrophysical black holes detectable by current gravitational wave detectors, this implies a cutoff length on the order of kilometers. Additionally, implications for gravitational wave science are discussed by exploring potential higher-dimensional operators associated with the scale of UV completion.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Multidisciplinary
Reuven Balkin, Javi Serra, Konstantin Springmann, Stefan Stelzl, Andreas Weiler
Summary: In this study, we investigate the influence of matter density effects on theories with a false ground state. Large and dense systems, such as stars, can disrupt a metastable minimum and facilitate the formation of bubbles of the true minimum. We derive the conditions for the formation of these bubbles and their confinement or escape to infinity. The latter case leads to a phase transition in the universe during star formation. We explore the phenomenological consequences of such seeded phase transitions.