Article
Physics, Particles & Fields
Daniel Elander, Maurizio Piai
Summary: Within the context of top-down holography, this study explores a one-parameter family of regular background solutions of maximal gauged supergravity in seven dimensions, which are obtained by dimensionally reducing on a 2-torus. The corresponding dual field theory exhibits a global symmetry breaking pattern and includes particles with exotic quantum numbers. The interplay between explicit and spontaneous symmetry breaking is discussed.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Daniel Elander, Michele Frigerio, Marc Knecht, Jean-Loic Kneur
Summary: This article continues the study of strongly-coupled, approximately scale-invariant gauge theories with a large number of flavours, focusing on their application in the composite-Higgs scenario. By extending the holographic models, the authors compute the spectrum of composite fermionic states and observe the presence of light fermionic bound states in certain regions of parameter space. Additionally, a dense spectrum of states is observed in the presence of multi-scale dynamics induced by a large backreaction of bulk scalars on the geometry. The linear coupling between composite and elementary fermions is also studied, revealing that it can be dangerously irrelevant in certain circumstances. Finally, the partially composite spectrum is computed and its potential phenomenological implications, such as for top-quark partners, are assessed.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Daniel Elander, Michele Frigerio, Marc Knecht, Jean-Loic Kneur
Summary: This study focuses on strongly-coupled gauge theories with mass gap in the infrared and considers a large number of fermion flavours for ultraviolet completion in composite Higgs scenario. By using holographic approach, new models are introduced to incorporate the backreaction of flavour on geometry. The mass spectrum of composite bosonic states is computed and its dependence on symmetry-breaking operators and number of flavours is analyzed, with a critical survey on regions with light dilaton. Validity of holographic approach is carefully assessed and compared with lattice simulations and Nambu-Jona-Lasinio model.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Giacomo Cacciapaglia, Shahram Vatani, Chen Zhang
Summary: The article discusses a framework based on partial unification that can generate couplings and masses for standard model fermions, including neutrinos, while presenting a specific model to demonstrate this approach. Researchers point out that the Sp(4) hypercolor group and lattice studies will be crucial for validating the model.
Article
Physics, Particles & Fields
Johanna Erdmenger, Nick Evans, Werner Porod, Konstantinos S. Rigatos
Summary: A holographic model is used to study the dynamics and spectrum of composite Higgs models, showing encouraging results close to lattice simulations in terms of masses and decay constants. The model allows computation of additional observables not yet computed on the lattice and relaxation of quenched approximation, providing insights into the fermion content of realistic composite Higgs models. Additionally, a new holographic description of top partners is provided, predicting the spectrum for models with top partners proposed by Ferretti and Karateev.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Martin Rosenlyst
Summary: The article proposes a method to understand partially composite Higgs models, with compositeness scale up to the Planck scale. A novel mechanism is introduced to assist this process. By studying a specific model example, the authors demonstrate the operation of this mechanism and discuss the vacuum stability of the model and the search for parameter space.
Article
Astronomy & Astrophysics
Yannick Meurice
Summary: The article introduces the lattice compact Abelian Higgs model and quantum simulation using a ladder-shaped optical lattice in 1 + 1 dimensions. By building local Hilbert spaces with Rydberg atoms, the concept of ladder-shaped configurable arrays is proposed. Concrete proposals involving two and three atoms for constructing spin-1 spaces and analytical tools for design and building are discussed.
Article
Astronomy & Astrophysics
Yi Chung
Summary: The paragraph discusses a composite Higgs model based on the SU(6)/Sp(6) coset, with an U(1) subgroup of Sp(6) identified as the flavor symmetry. By introducing a light flavon, it generates the mass hierarchy between the top and bottom quarks and provides a testable model for the origin of flavor hierarchy. The direct search of additional scalar bosons can be conducted in HL-LHC and future hadron colliders.
Article
Physics, Multidisciplinary
Thomas Appelquist, James Ingoldby, Maurizio Piai
Summary: This study proposes a composite Higgs model based on an SU(3) gauge theory with Dirac fermions, modifying the effective field theory to include standard model quantum numbers and trigger electroweak symmetry breaking. The model features a pNGB Higgs boson, heavier pNGBs, and an approximate dilaton in the same mass range, with the study focusing on the phenomenology of the model and the tuning required for consistency with current bounds on new physics.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Giacomo Cacciapaglia, Mads T. Frandsen, Wei-Chih Huang, Martin Rosenlyst, Philip Sorensen
Summary: We propose a novel class of composite models that combine technicolor and composite Higgs vacuum limits, resulting in an asymmetric dark matter candidate. These models are based on an extended left-right electroweak symmetry with a pseudo-Nambu Goldstone boson Higgs and stable dark matter candidates charged under a global U(1)X symmetry.
Article
Astronomy & Astrophysics
Giacomo Cacciapaglia, Shahram Vatani, Chen Zhang
Summary: Composite Higgs models can be extended to the Planck scale using the partially unified partial compositeness (PUPC) framework. The Techni-Pati-Salam model is based on a renormalizable gauge theory and predicts masses and mixings for standard model fermions through partial compositeness at low energy. This model also suggests the presence of a dark matter candidate in the few TeV range.
Article
Physics, Particles & Fields
G. Cacciapaglia, T. Flacke, M. Kunkel, W. Porod
Summary: In this study, we investigate the LHC phenomenology of a particular composite Higgs model that includes SU(3) color octet top partners and color singlet top partners, in addition to the usually considered triplet representations. We highlight that some of these unusual top partners may bear resemblance to the gluinos predicted in supersymmetric models.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Aldo Deandrea, Fabio Dogliotti, Dimitrios Tsimpis
Summary: In this article, we investigate the compactification of a Yang-Mills theory on a three-dimensional nilmanifold and its associated mass hierarchy. By examining a specific example of an SU(3) model, we reveal the relevance of twisted geometries in model building and gauge-Higgs type models.
Article
Physics, Particles & Fields
Carlos Bautista, Leonardo de Lima, Ricardo D'Elia Matheus, Eduardo Ponton, Leonidas A. Fernandes do Prado, Aurore Savoy-Navarro
Summary: In this study, the production of t (t) over barh and t (t) over bar hh at hadron colliders in the minimal Composite Higgs Models based on the coset SO(5)/SO(4) is investigated, with a focus on the fermionic representations 5 and 14. The analysis shows that in certain regions of parameter space, the three-body decay channel W(+)W(-)t becomes significant in the production of top partners, especially in a degenerate spectrum, and this significance is further enhanced by increasing the top partner's mass.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Blagojevic, B. Cvetkovic
Summary: In Poincare gauge theory, black hole entropy is canonically defined by the variation of a boundary term Gamma(H) located at the horizon. For a new member of the same class, the Reissner-Nordstrom-like black hole with torsion, the variation of Gamma(H) is affected by a gravitational parameter induced by the existence of torsion, ensuring the validity of the first law.
Article
Physics, Particles & Fields
Antonio P. Morais, Roman Pasechnik, Werner Porod
EUROPEAN PHYSICAL JOURNAL C
(2020)
Article
Physics, Particles & Fields
Theodoros Nakas, Konstantinos S. Rigatos
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Physics, Particles & Fields
Konstantinos S. Rigatos
Summary: This study investigates the classical integrability of certain supergravity vacua containing an AdS(3) factor, using an established method for analyzing non-integrability. The results show that, except in specific limits, all supergravity solutions are non-integrable. This is in contrast to the known integrable solutions AdS(3) x S-3 x S3 x S-1 and AdS(3) x S-3 x T-4.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Johanna Erdmenger, Nick Evans, Werner Porod, Konstantinos S. Rigatos
Summary: A holographic model is used to study the dynamics and spectrum of composite Higgs models, showing encouraging results close to lattice simulations in terms of masses and decay constants. The model allows computation of additional observables not yet computed on the lattice and relaxation of quenched approximation, providing insights into the fermion content of realistic composite Higgs models. Additionally, a new holographic description of top partners is provided, predicting the spectrum for models with top partners proposed by Ferretti and Karateev.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Konstantinos C. Rigatos, Xinan Zhou
Summary: In this paper, an infinite class of Witten diagrams invariant under a Yangian symmetry is explored, showing that the Yangian invariance is equivalent to the consistency of the recursion relations.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Particles & Fields
Niko Jokela, Jose Manuel Penin, Konstantinos Christos S. Rigatos
Summary: This paper constructs gravity duals to supersymmetric gauge theories in the presence of unquenched flavor hypermultiplets. By considering the intersection of two sets of D3-branes in (1+1)-dimensional defect, the closed set of equations describing the dual geometry for a large number of colors and flavors in the Veneziano limit is derived. The solutions for massless flavors and the small flavor limit of massive hypermultiplets are briefly discussed. It is found that the 1/16-BPS supergravity solutions are generally asymptotically anti de-Sitter and the dilaton does not vary with the holographic radial coordinate, indicating the reliability of the classical Type IIB supergravity solutions for the gauge theories from the deep IR to the far UV.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Konstantinos C. Rigatos
Summary: We study spin-2 fluctuations in the type IIB theory on an infinite family of warped backgrounds AdS(2) x S-2 x T-4 x S-1 x I-rho with N = 4 supersymmetry. We find a special set of solutions, the minimal universal class, which is independent of the background data. These solutions correspond to operators with scaling dimension Delta = l + 1, where l is the quantum number of angular momentum on S-2. By computing the mode solutions, we determine the central charge of the dual field theories. We also discuss the relation between our results and the seed AdS(3) x S-2 x T-4 x I-rho backgrounds.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Fernando Abreu de Souza, Miguel Crispim Romao, Nuno Filipe Castro, Mehraveh Nikjoo, Werner Porod
Summary: Constraining beyond the Standard Model theories often involves scanning complex parameter spaces and comparing observable predictions to experimental and theoretical constraints. This task can be time-consuming and computationally expensive, especially when the model is highly constrained and sampling efficiency is low. In this study, we addressed this challenge by utilizing artificial intelligence and machine learning search algorithms for black-box optimization problems. By applying our methodology to constrained minimal supersymmetric standard model and phenomenological minimal supersymmetric standard model parameter spaces, considering constraints on Higgs mass and dark matter relic density, we achieved orders of magnitude improvement in sampling efficiency while effectively covering the parameter space.
Article
Astronomy & Astrophysics
Alexandre Alvarez, Ricardo Cepedello, Martin Hirsch, Werner Porod
Summary: This paper discusses whether the parameter space of the scotogenic model can be constrained by the requirement of no Z(2)-breaking in the early universe, and shows that this requirement does not impose any constraints at least in the parts where perturbation theory can be trusted, by considering the proper decoupling of heavy degrees of freedom.
Article
Astronomy & Astrophysics
J. Masias, N. Cerna-Velazco, J. Jones-Perez, W. Porod
Summary: In this study, a scenario inspired by natural supersymmetry is investigated, involving the addition of light right-handed neutrinos and their superpartners in the minimal supersymmetric Standard Model. It is found that existing LHC data constrains the allowed slepton masses, with upcoming runs likely to discover or rule out sleptons with masses of 300 GeV. A prospective international e(+)e(-) linear collider with a center of mass energy of 1 TeV is shown to have the capability to discover sleptons in challenging scenarios and measure the spectrum with 1-3 percent accuracy.
Article
Astronomy & Astrophysics
Nick Evans, Konstantinos S. Rigatos
Summary: Chiral symmetry breaking is related to the dimension of the quark bilinear condensate passing through one, and is supported by gap equations and holographic models. Confinement may be a separate property of pure Yang-Mills theory, occurring below the scale of dynamically generated quark mass.
Article
Astronomy & Astrophysics
T. Faber, Y. Liu, W. Porod, M. Hudec, M. Malinsky, F. Staub, H. Kolesova
Article
Astronomy & Astrophysics
T. Faber, Y. Liu, W. Porod, J. Jones-Perez
