Article
Physics, Multidisciplinary
Mauro Napsuciale
Summary: In this work, it is shown by a first principles calculation that quantum states describing massive relativistic free spinning particles obey certain kinematical conditions, which can be traced back to parity as a good quantum number. These conditions are fundamental to the equations of motion and the constraints satisfied by the corresponding fields. In the massless limit, a well-defined parity is lost but a symmetry related to arbitrary changes in the unphysical parity components emerges, and it is demonstrated that this emergent symmetry is the celebrated gauge symmetry.
Article
Physics, Multidisciplinary
Tomas Codina, Olaf Hohm, Diego Marques
Summary: This study confirms the compatibility of the cosmological reduction of the fourth powers of the Riemann tensor with O(9, 9) symmetry, and further validates Sen's assertion that the space of cosmological solutions in string theory has an O(d) x O(d) symmetry.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Yongcheng Wu, Ke-Pan Xie, Ye-Ling Zhou
Summary: Discrete symmetries in particle theories can lead to the formation of domain walls through spontaneous breaking. The domain walls resulting from larger discrete symmetries, such as Z(N), differ from the simplest Z(2) domain walls. This study focuses on Z(N) symmetry breaking and specifically examines the Z(3) case, providing semi-analytical results for the tension and thickness of domain walls. The inclusion of explicit symmetry-breaking terms leads to more complex dynamics and distinct gravitational wave signals compared to Z(2) domain walls.
Article
Physics, Particles & Fields
Louise Anderson, Matthew M. Roberts
Summary: The article discusses the construction of new families of deformed supersymmetric field theories by writing deformations as couplings to background multiplets, and also considers backgrounds which preserve some superconformal symmetry, finding scale-invariant field profiles, as well as N = 2 theories on S-3. This work is related to previous research on interface SCFTs and other holographic calculations.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Economics
Alain Kabundi, Aubrey Poon, Ping Wu
Summary: This paper empirically investigates the role of global and domestic factors in driving dynamics in inflation using panel data. The results show the predominance of global factors in explaining inflation dynamics, especially for emerging market economies. The Phillips curve is flat for both advanced economies and emerging market economies, but flatter for the former. The findings are consistent with the theoretical view that increased globalization and trade are underlying factors behind the flattening of the Phillips curve.
ECONOMIC MODELLING
(2023)
Article
Physics, Particles & Fields
Jose Figueroa-O'Farrill, Alfredo Perez, Stefan Prohazka
Summary: We define and classify classical Carroll and fracton particles by exploiting the close relationship between the Carroll and fracton/dipole algebras, in addition to using the method of coadjoint orbits. This approach establishes a correspondence between Carroll and fracton particles, revealing the connection between Carroll energy and center-of-mass and fracton charge and dipole moment. Furthermore, we identify new massless Carrollian/neutral fractonic particles and establish a GL(2, Double-struck capital R) symmetry to relate them.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Multidisciplinary
Hadiseh Alaeian, Berislav Buca
Summary: In this study, by utilizing modulated dynamical symmetries, the existence of multistability in the presence of quantum fluctuations is exactly proven in a driven-dissipative fermionic chain. Unlike the mean-field level, the quantum fluctuations themselves exhibit multistability.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Particles & Fields
Joaquim Gomis, Euihun Joung, Axel Kleinschmidt, Karapet Mkrtchyan
Summary: The paper presents a generalization of the three-dimensional Poincare algebra that includes a color symmetry factor, which can be used to define colored Poincare gravity and study generalized particle models. Different particle models based on colored Poincare symmetry orbits are discussed, serving as a starting point for describing particles interacting with a nonabelian background field or as a worldline formulation for associated quantum field theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Roman Geiko, Gregory W. Moore
Summary: The article discusses a threefold classification and a tenfold classification scheme for unitary irreducible representations of groups, proving the equivalence of these two classification methods.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Review
Physics, Multidisciplinary
Victor Aldaya
Summary: Elementary interactions are formulated based on the principle of minimal interaction and symmetries, rewriting field theories within the framework of Lie groups. This allows for quantization of fundamental physical theories using a group approach. Objects like vector potentials can be considered as group parameters in extended gauge groups.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Particles & Fields
Ben Pethybridge, Vladimir Schaub
Summary: In this paper, we construct the Wightman function for symmetric traceless tensors and Dirac fermions in dS(d+1) using a coordinate and index free formalism in a d + 2 dimensional ambient space. We expand this framework to cover spinor and tensor fields in any even or odd dimension. The goal is to provide a self-contained toolkit for studying fields of arbitrary spin in de Sitter, particularly in the context of cosmological perturbation theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Yorgo Pano, Andrea Puhm, Emilio Trevisani
Summary: In this study, conformal representation theory tools are used to classify the symmetries associated with conformally soft operators in celestial CFT (CCFT) in dimensions d. The celestial multiplets in d > 2 have a structure known as celestial necklaces which are much richer than the celestial diamonds in d = 2 and depend on whether d is even or odd. A unified method is presented for constructing the conserved charges associated with operators with primary descendants. Unlike CCFT2, the soft symmetries in CCFTd>2 are found to be finite-dimensional. Non-trivial charges associated with (generalized) currents and stress tensor are obtained from the shadow transform of soft operators.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Cagin Yunus, William Detmold
Summary: This study determines the asymptotic form of the distributions of correlation functions at vanishing momentum for bosonic interacting lattice field theories with a unique gapped vacuum, and demonstrates that the deviations from the asymptotic form at large Euclidean times can be used to determine the spectrum of the theory.
Article
Physics, Particles & Fields
Shuxuan Ying
Summary: This study investigates the smoothing out of black hole singularities in string theory. By considering 2D string black holes and 3D black strings, and using the low energy effective spacetime action, the study provides classes of exact non-perturbative and non-singular solutions of these black holes/strings through complete a' corrections.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Multidisciplinary
Yoshimasa Hidaka, Yuji Hirono, Ryo Yokokura
Summary: In this study, we discuss the counting of Nambu-Goldstone modes associated with the spontaneous breaking of higher-form global symmetries. Effective field theories of NG modes are developed based on symmetry-breaking patterns, using a generalized coset construction for higher-form symmetries. The formula derived for the number of gapless NG modes involves expectation values of the commutators of conserved charges, possibly of different degrees.
PHYSICAL REVIEW LETTERS
(2021)
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
Astronomy & Astrophysics
Lam Hui, Austin Joyce, Riccardo Penco, Luca Santoni, Adam R. Solomon
Summary: This article investigates the tidal response of asymptotically flat black holes in general relativity and finds that the response is zero due to the linear symmetries governing static perturbations around the black holes. These symmetries have a geometric origin and a ladder structure that can be used to construct the complete set of solutions and derive their general properties. It is shown that solutions spontaneously break the symmetries when they decay with radius and respect the symmetries when they are regular at the horizon. These properties imply that tidal response coefficients, including Love numbers, vanish, which is consistent with the absence of black holes with linear hair. Furthermore, the manifestation of these symmetries in the effective point particle description of a black hole is discussed, demonstrating that couplings associated with non-trivial tidal response and scalar hair must vanish for the symmetries to be preserved.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Multidisciplinary
Daniel Baumann, Carlos Duaso Pueyo, Austin Joyce, Hayden Lee, Guilherme L. Pimentel
Summary: This research extends the cosmological bootstrap to correlators involving massless spinning particles, focusing on spin-1 and spin-2 fields. By solving Ward identities using weight-shifting operators acting on scalar seed solutions, three- and four-point correlators of massless spin-1 and spin-2 fields with conformally coupled scalars are derived. Locality constraints for massless spinning particles manifest as current conservation on the boundary, imposing nontrivial constraints on the couplings between conserved currents and other operators. The study also applies these methods to slow-roll inflation, deriving phenomenologically relevant scalar-tensor three-point functions.
Article
Physics, Particles & Fields
James Bonifacio, Kurt Hinterbichler, Austin Joyce, Diederik Roest
Summary: This study examines certain aspects of the special galileon and DBI theories in curved space. For the special galileon theory, a new compact expression for its Lagrangian in de Sitter space is discovered, along with a field redefinition that relates it to the previous, more complex formulation. This field redefinition simplifies into the well-studied galileon duality redefinition in the flat space limit. For the DBI theory in de Sitter space, the brane and dilaton formulations are discussed and strong evidence is presented to suggest that they are related by a field redefinition. Additionally, an interpretation of the symmetries of these theories in terms of broken diffeomorphisms of de Sitter space is provided.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Mariana Carrillo Gonzalez, Qiuyue Liang, Mark Trodden
Summary: We explore the application of the double copy to massive theories and discover a new cubic theory with a local double copy. By reducing the nonlinear Sigma model and the special Galileon theory from five dimensions to four, we establish a double copy relation between the resulting massive scalar field theories. We also find a new cubic interaction that satisfies the BCJ relations up to 5-point amplitudes.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Austin Joyce, Alberto Nicolis, Alessandro Podo, Luca Santoni
Summary: The text discusses the subtleties of renormalization that arise when deriving a low-energy effective action by integrating out heavy fields of a more complete theory. It provides a concrete example of applying this method to derive the U(1) Goldstone low-energy effective theory and the one-loop equation of state for the superfluid phase of (complex) phi(4). Additionally, it analyzes a renormalizable scalar SO(N) theory at finite chemical potential, demonstrating the absence of the original SO(N) symmetry in the effective theory for the gapless Goldstone.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Daniel Baumann, Wei-Ming Chen, Carlos Duaso Pueyo, Austin Joyce, Hayden Lee, Guilherme L. Pimentel
Summary: This paper studies rational correlators, including those of gauge fields, gravitons, and the inflaton. By analytic continuation, using the constraints of unitarity and recursion relations, the singularities of correlators can be revealed, and the full correlators can be efficiently bootstrapped in flat space.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Lam Hui, Austin Joyce, Riccardo Penco, Luca Santoni, Adam R. Solomon
Summary: We study the near-zone symmetries of a massless scalar field on four-dimensional black hole backgrounds and provide a geometric understanding that unifies various recently discovered symmetries as part of an SO(4, 2) group. A subset of these symmetries corresponds to the static sector and leads to the ladder symmetries responsible for the vanishing of Love numbers. We compare different near-zone approximations in the literature for the Kerr case and focus on the implementation that retains the symmetries of the static limit. We also describe the relation to spin-1 and 2 perturbations.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Nuclear
Jonathan J. Heckman, Austin Joyce, Jeremy Sakstein, Mark Trodden
Summary: This article explores the potential uses of physics in Kleinian signature spacetimes (2 + 2) to understand the properties of physics in Lorentzian signature (3 + 1). Similar to how Euclidean signature quantities can be used to construct the ground state wavefunction of a Lorentzian quantum field theory, an analytic continuation to Kleinian signature can construct a low particle flux state. The existence of a natural supersymmetry algebra in 2 + 2 signature can also constrain the structure of correlation functions. The spontaneous breaking of Lorentz symmetry can produce various MATHEMATICAL SCRIPT CAPITAL N?=1/2 supersymmetry algebras in 3 + 1 signature, which correspond to nonsupersymmetric systems. Speculation is made on the possible role of these structures in addressing the cosmological constant problem.
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
(2023)
Article
Astronomy & Astrophysics
Justin Khoury, Toshifumi Noumi, Mark Trodden, Sam S. C. Wong
Summary: Shift-symmetric Horndeski theories exhibit a class of Schwarzschild-de Sitter black hole solutions with time-dependent scalar hair. Lemaitre-type coordinates are used to study the properties of these solutions, where the profile of the Horndeski scalar field is linear in the relevant time coordinate. An effective field theory (EFT) is constructed to understand the stability of hairy black holes in shift-symmetric Horndeski theories and provide constraints for stable black hole solutions. The EFT is analyzed in the decoupling limit to identify potential sources of instability and a complete analysis is performed for odd-parity linear perturbations in spherically symmetric spacetime.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Particles & Fields
Kurt Hinterbichler, Diego M. Hofman, Austin Joyce, Gregoire Mathys
Summary: We study effective field theories (EFTs) with biform symmetries, characterized by conserved electric current and, in certain cases, a topological magnetic current with an anomalous conservation law. We prove that the mixed anomaly uniquely determines the two-point function between the electric and magnetic currents, and show the presence of a massless mode protected by the anomaly. Additionally, the anomaly leads to a universal form of the EFT dominated by a relevant term resembling the linear Einstein action.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Noah Bittermann, Austin Joyce
Summary: We study the structure of the flat space wavefunctional in scalar field theories with nonlinearly realized symmetries. These symmetries imply soft theorems that are satisfied by wavefunction coefficients in the limit where one of the external momenta is scaled to zero. We combine these soft theorems with information about the singularity structure of the wavefunction to bootstrap the wavefunction coefficients of these theories, and systematize this construction through recursion relations.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Kurt Hinterbichler, Qiuyue Liang, Mark Trodden
Summary: Conformal symmetry can break spontaneously in the presence of defects or other backgrounds, resulting in a symmetry-breaking VEV for certain scalar operators. We analyze the effective field theory of fluctuations around these backgrounds and find that it can be expanded in inverse powers of the VEV, with leading corrections computed. We specifically focus on spacelike defects in a four-dimensional Lorentzian theory relevant to the pseudoconformal universe scenario, but the conclusions can be extended to other types of defects and the breaking of conformal symmetry to Poincare symmetry.
Article
Astronomy & Astrophysics
Mary Gerhardinger, John T. Jr Jr Giblin, Andrew J. Tolley, Mark Trodden
Summary: The Galileon scalar field theory, which exhibits the Vainshtein screening mechanism, has implications for predictions of gravitational waves and tests of gravity. The derivative nature of their interactions poses a challenge in effective field theories but can be overcome through numerical simulations.
Article
Astronomy & Astrophysics
Tanvi Karwal, Marco Raveri, Bhuvnesh Jain, Justin Khoury, Mark Trodden
Summary: Early dark energy (EDE) provides a theoretical approach to address the Hubble tension, but it brings its own challenges related to dark matter and large-scale structure. To overcome these challenges, we propose a mechanism called chameleon early dark energy (CEDE), which involves couplings between EDE and dark matter.
