Results 11 to 20 of about 9,953 (225)
Minimal anomalous U(1) theories and collider phenomenology
Journal of High Energy Physics, 2018 We study the collider phenomenology of a neutral gauge boson Z ′ arising in minimal but anomalous U(1) extensions of the Standard Model (SM). To retain gauge invariance of physical observables, we consider cancellation of gauge anomalies through the ...
Andreas Ekstedt +4 more
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On the associativity of 1-loop corrections to the celestial operator product in gravity
Journal of High Energy Physics, 2023 The question of whether the holomorphic collinear singularities of graviton amplitudes define a consistent chiral algebra has garnered much recent attention.
Roland Bittleston
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Exploring 2-group global symmetries
Journal of High Energy Physics, 2019 We analyze four-dimensional quantum field theories with continuous 2-group global symmetries. At the level of their charges, such symmetries are identical to a product of continuous flavor or spacetime symmetries with a 1-form global symmetry U(1) B (1) ,
Clay Córdova +2 more
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Metric-independent measures for supersymmetric extended object theories on curved backgrounds
Physics Letters B, 2014 For Green–Schwarz superstring σ-model on curved backgrounds, we introduce a non-metric measure Φ≡ϵijϵIJ(∂iφI)(∂jφJ) with two scalars φI(I=1,2) used in ‘Two-Measure Theory’ (TMT). As in the flat-background case, the string tension T=(2πα′)−1 emerges as an
Hitoshi Nishino, Subhash Rajpoot
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Nuclear Physics B, 2018 We use Pauli–Villars regularization to evaluate the conformal and chiral anomalies in the effective field theories from Z3 and Z7 compactifications of the heterotic string without Wilson lines.
Mary K. Gaillard, Jacob Leedom
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Chiral anomalies on a circle and their cancellation in F-theory
Journal of High Energy Physics, 2018 We study in detail how four-dimensional local anomalies manifest themselves when the theory is compactified on a circle. By integrating out the Kaluza-Klein modes in a way that preserves the four-dimensional symmetries in the UV, we show that the three ...
Pierre Corvilain +2 more
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Dark matter as ultralight axion-like particle in E6 × U(1)X GUT with QCD axion
Physics Letters B, 2018 Axion-like fields are naturally generated by a mechanism of anomaly cancellation of one or more anomalous gauge abelian symmetries at the Planck scale, emerging as duals of a two-form from the massless bosonic sector of string theory.
Claudio Corianò, Paul H. Frampton
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International Journal of Adaptive Control and Signal Processing, EarlyView.This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley +1 more source
Double E─H Bond Activation of Ammonia and Water by Cyclic Gallaphosphene L(OCP)GaPGaL
Angewandte Chemie, EarlyView.Cyclic gallaphosphene 1 undergoes a twofold E─H bond activation with ammonia and water via a beneficial interplay between the polar “GaPGa” unit and the electrophilic nature of the C center in the bridging PCO unit, yielding six‐membered heterocycles 2 and 3, in which both nucleophilic phosphorus atoms are protonated.
Mahendra K. Sharma +3 more
wiley +2 more sources
Advanced Functional Materials, EarlyView.This study examines how pore shape and manufacturing‐induced deviations affect the mechanical properties of 3D‐printed lattice materials with constant porosity. Combining µ‐CT analysis, FEM, and compression testing, the authors show that structural imperfections reduce stiffness and strength, while bulk material inhomogeneities probably enhance ...
Oliver Walker +5 more
wiley +1 more source