Article
Physics, Particles & Fields
Yoshiki Sato
Summary: We studied the p-dimensional conformal defect of a free Dirac fermion on a d-dimensional flat space and found important properties regarding boundary conditions. For a two-codimensional defect, a double trace deformation triggers a renormalization group flow from the Neumann boundary condition to the Dirichlet boundary condition, with the free energy at the UV fixed point always larger than that at the IR fixed point.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Clay Cordova, Thomas T. Dumitrescu, Kenneth Intriligator
Summary: The study of six-dimensional quantum field theories reveals the presence of mixed anomalies in little string theories but their absence in SCFTs. This discovery provides an algorithm for computing the 't Hooft anomalies of most SCFTs. Furthermore, it is proven that the a-type Weyl anomaly of all SCFTs with a tensor branch must be positive.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Hermes Belusca-Maito
Summary: We discuss the consistent formulation of renormalisation group equations using the algebraic renormalisation framework in the context of a dimensionally-renormalised chiral field theory in the BMHV scheme. The BRST symmetry, initially broken at the quantum level, is restored via finite counterterms. We compare this with the more standard multiplicative renormalisation approach and apply both procedures to evaluate the beta-function and anomalous dimensions of a massless chiral right-handed QED model up to two-loop orders.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Tatsuki Nakajima, Tadakatsu Sakai, Ryo Yokokura
Summary: In this study, we discuss the BCF anomaly of massless QCD-like theories, initially obtained by Anber and Poppitz, from the perspective of low energy effective theories. We assume that these theories undergo spontaneous chiral symmetry breaking due to a quark bilinear condensate. By utilizing the 't Hooft anomaly matching condition for the BCF anomaly, we demonstrate that the low energy effective action comprises a chiral Lagrangian, a Wess-Zumino-Witten term, and an interaction term between the eta' meson and the background gauge field for a discrete one-form symmetry. We show that the low energy effective action resolves the quantum inconsistencies associated with the eta' meson, arising from the ambiguity of uplifting the action to a five-dimensional spacetime with a boundary. The eta' term plays a significant role in exploring the emergent higher-group structure at low energies.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Tatsuma Nishioka, Yoshiki Sato
Summary: The study describes conformal defects of p dimensions in a free scalar theory as boundary conditions on the conformally flat space H(p+1)x?(d-p-1), classifying them into Dirichlet type and Neumann type. It is found that Dirichlet boundary conditions always exist, while Neumann boundary conditions are only allowed for defects of lower codimensions. The results are consistent with a recent classification of non-monodromy defects, highlighting the association of Neumann boundary conditions with non-trivial defects.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Tomas Brauner
Summary: Higher-form symmetries act on extended objects, not on point particles, and can coexist with ordinary point-particle symmetries in a direct product symmetry group. When these symmetries become entangled, a more general mathematical structure related to higher categorical groups is required. Higher-group symmetry can emerge from a bottom-up perspective when physical systems contain at least two different spontaneously broken symmetries.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Joe Davighi, Nakarin Lohitsiri, Arun Debray
Summary: 2-group symmetries arise in physics when a 0-form symmetry G([0]) and a 1-form symmetry H-[1] intertwine, forming a generalised group-like structure. Specialising to the case where both G([0]) and H-[1] are compact, connected, abelian groups (i.e. tori), we analyse anomalies in such ‘toric 2-group symmetries' using the cobordism classification. By leveraging a variety of algebraic methods, we show that Omega(Spin)(5) (B vertical bar G vertical bar) congruent to Z/m where m is the modulus of the Postnikov class for G, and we reproduce the expected physics result for anomalies in 2-group symmetries that appear in 4d QED. Moving down two dimensions, we recap that any (anomalous) U(1) global symmetry in 2d can be enhanced to a toric 2-group symmetry, before showing that its associated local anomaly reduces to at most an order 2 anomaly, when the theory is defined with a spin structure.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Teresa Bautista, Lorenzo Casarin, Hadi Godazgar
Summary: Motivated by the goal of applying the average null energy condition (ANEC) to renormalisation group flows, this research calculates the expectation value of the ANEC operator in a particular scalar state perturbatively in lambda phi (4) theory, up to third order in the quartic coupling. The study verifies the expected CFT answer and provides technical tools for studying the expectation value of the ANEC operator in more interesting states, such as tensorial states relevant to the Hofman-Maldacena collider bounds.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Tatsuki Nakajima, Tadakatsu Sakai, Ryo Yokokura
Summary: We investigate the higher-group structure underlying 2n-dimensional axion electrodynamics, which is manifested as a Green-Schwarz transformation. The n = 3 case is studied most intensively, and correlation function identities among the global symmetry generators are derived using a gauge transformation. The Green-Schwarz transformation and 't Hooft anomalies associated with the gauge transformation play a key role in this computation. The algebraic structure of the results and their physical interpretations, including a multi-ary operation among the symmetry generators for n = 3, are discussed in detail.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Astronomy & Astrophysics
Mirjam Cvetic, Markus Dierigl, Ling Lin, Hao Y. Zhang
Summary: This passage discusses the compactification of the CHL string to eight dimensions using embeddings of root lattices into the momentum lattice Lambda(M). By this method, the global gauge group structure can be determined, including all U(1) factors. The topology of the gauge group is encoded in the dual of the momentum lattice, with nontrivial pi(1)(G) = Z corresponding to gauging a Z 1-form symmetry.
Article
Physics, Particles & Fields
Hajime Fukuda, Kazuya Yonekura
Summary: This study examines the phenomenon of charge teleportation between two spatially separated objects without exchanging charged particles, which is achieved through anomaly inflow and implies the presence of anomalous quantum mechanics. Despite charge violation in the anomalous theories living on these objects, the total charge between the two spatially separated objects remains conserved.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Juan L. Manes, Manuel Valle, Miguel A. Vazquez-Mozo
Summary: The study investigates the torsional contributions to the equilibrium partition function in a stationary background, revealing the existence of linear torsional magnetic and vortical effects. The analysis also evaluates the torsional contributions to the constitutive relations, showing the existence of a torsional electric chiral effect.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Hermes Belusca-Maieto, Amon Ilakovac, Paul Kuehler, Marija Mador-Bozinovic, Dominik Stoeckinger
Summary: The study applies the BMHV scheme to investigate an abelian chiral gauge theory with non-anticommuting gamma(5) at the two-loop level. The full structure of symmetry-restoring counterterms up to the two-loop level is determined, revealing that ultraviolet divergences cannot be completely canceled by counterterms generated by field and parameter renormalization. Additionally, the paper establishes a two-loop methodology based on the quantum action principle and direct computations of Slavnov-Taylor identity breakings, which can also be applied to nonabelian gauge theories.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Ibrahima Bah, Federico Bonetti, Ruben Minasian, Peter Weck
Summary: The authors extend anomaly inflow methods from M-theory to SCFTs engineered via D3-branes in type IIB. They demonstrate that the 't Hooft anomalies of these SCFTs can be systematically computed from their geometric definition. The procedure is tested in several 4d examples and applied to 2d theories obtained by wrapping D3-branes on a Riemann surface.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Joe Davighi, Nakarin Lohitsiri
Summary: This note reviews the role of homotopy groups in determining non-perturbative gauge anomalies, emphasizing that non-vanishing of pi (d) (G) is neither necessary nor sufficient for the existence of global anomalies. Through examples in 6-dimensional gauge theories, it is shown that conditions previously thought to be sufficient for global anomaly cancellation are actually necessary conditions for local anomalies to vanish.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
D. V. Fursaev
JOURNAL OF HIGH ENERGY PHYSICS
(2015)
Article
Astronomy & Astrophysics
Dmitri V. Fursaev
Article
Astronomy & Astrophysics
D. V. Fursaev
Correction
Astronomy & Astrophysics
D. V. Fursaev
Article
Astronomy & Astrophysics
Dmitri V. Fursaev, Alexander Patrushev, Sergey N. Solodukhin
Article
Physics, Particles & Fields
D. V. Fursaev
JOURNAL OF HIGH ENERGY PHYSICS
(2012)
Article
Astronomy & Astrophysics
E. A. Davydov, D. V. Fursaev, V. A. Tainov
Summary: This study precisely solves the equations of motion of null cosmic strings near black holes in the weak-field approximation, revealing how scattering by black holes transforms string momenta and calculating the corresponding recoil effect and angular momentum change of black holes. The energy of null strings evolves along the null direction of their trajectory, connected with the string optical scalar Z.
Article
Astronomy & Astrophysics
D. Fursaev
Summary: An optical equation for null strings, similar to those for null geodesic congruences, is derived using a single complex scalar function Z. The real and imaginary parts of Z determine the expansion and rotation of strings. String trajectories are represented in complex Z-plane diagrams, capturing universal features of null strings in different backgrounds.
Article
Astronomy & Astrophysics
D. V. Fursaev
Article
Astronomy & Astrophysics
D. V. Fursaev
Article
Astronomy & Astrophysics
Amin Faraji Astaneh, Clement Berthiere, Dmitri Fursaev, Sergey N. Solodukhin
Article
Astronomy & Astrophysics
Dmitry V. Fursaev, Sergey N. Solodukhin
Article
Physics, Particles & Fields
Dmitri V. Fursaev
JOURNAL OF HIGH ENERGY PHYSICS
(2006)
Article
Physics, Multidisciplinary
Dmitri V. Fursaev
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
(2006)