Journal of High Energy Physics最新文献

In this work, we employ the Tannaka-Krein reconstruction to compute the quantum double 𝒟(𝒢) of a finite 2-group 𝒢 as a Hopf monoidal category. We also construct a 3+1D lattice model from the Dijkgraaf-Witten TQFT functor for the 2-group 𝒢, generalizing Kitaev’s 2+1D quantum double model. Notably, the string-like local operators in this lattice model are shown to form 𝒟(𝒢). Specializing to 𝒢 = ℤ₂, we demonstrate that the topological defects in the 3+1D toric code model are modules over 𝒟(ℤ₂).

The QCD axion is investigated within the minimal supersymmetric SO(10) grand unified theory, where the Yukawa sector involves Higgs multiplets 10 and ( overline{textbf{126}} ). The relative phase between the VEVs of (10, 1, 3) ⊂ ( overline{textbf{126}} ) and (( overline{textbf{10}} ), 1, 3) ⊂ 126 under SU(4)_C × SU(2)_L × SU(2)_R is identified with the axion. The axion is dominantly the relative phase between ∆_R and ( {overline{Delta }}_R ), with a small 10-Higgs component due to the VEV hierarchy. The Peccei-Quinn and B − L symmetry breaking scales coincide through ( left|leftlangle {Delta}_Rrightrangle right|=left|leftlangle {overline{Delta}}_Rrightrangle right| ). The scalar partner of the lightest right-handed neutrino plays the role of the inflaton, realizing hybrid inflation consistent with the observed CMB density fluctuations. After inflation, both fields acquire VEVs, and the domain-wall problem is resolved through the Lazarides-Shafi mechanism, which naturally restricts the model to three generations.

We develop a twistor-space framework to compute boundary correlators via a boundary limit of nested Penrose transforms in (A)dS₄. Starting from correlators of (anti-)self-dual bulk fields, the boundary limit reproduces the correlators of the dual conserved currents; we demonstrate this explicitly for two- and three-point functions. The two-point correlator is rendered finite by working in Euclidean signature. At three points, we obtain compact rational twistor-space representatives obeying a double-copy relation, thereby clarifying the twistor-space origin of the results in https://arxiv.org/abs/2408.02727. We further extend the analysis to non-conserved currents with integer conformal dimension, dual to massive bulk fields, as well as to the free scalar.

We present a calculation of the thrust distribution in Higgs decays to quarks and gluons, ( Hto boverline{b} ), ( Hto coverline{c} ), and H → gg, including the resummation of large logarithmic corrections that arise in the two-particle limit at next-to-next-to-leading logarithmic (NNLL) accuracy, and match it to fixed-order results for three-particle decays at next-to-next-to-leading order (NNLO) in the strong coupling. The resummation is performed analytically within the Ares framework and combined with the fixed-order results using the logR matching technique. The fixed-order calculation is carried out numerically with the NNLOjet parton-level event generator, using the antenna subtraction method. We perform detailed cross-validation in the two-particle region, demonstrating that the expansion of the NNLL resummed result correctly reproduces the logarithmic structure of the fixed-order calculation to ( mathcal{O}left({alpha}_{textrm{s}}^3right) ), up to a predictable N³LL term at ( mathcal{O}left({alpha}_{textrm{s}}^3Lright) ). In addition to providing the first NNLO+NNLL accurate predictions for the thrust distribution in Higgs decays to quarks and gluons, we analytically extract the ( mathcal{O}left({alpha}_{textrm{s}}^2right) ) hard-virtual correction c₂ and the ( {alpha}_{textrm{s}}^3L ) term G₃₁ in both the ( Hto qoverline{q} ) (q = b, c) and H → gg decay channels.

We study fully BPS and a broad class of half-BPS stationary configurations of four-dimensional Euclidean ( mathcal{N}=2 ) supergravity with higher-derivative interactions. Working within the off-shell conformal supergravity framework of de Wit and Reys (arXiv:1706.04973), we analyse the complete set of Killing spinor equations and obtain the corresponding algebraic and differential constraints. We further derive the Euclidean attractor equations and evaluate the Wald entropy for the fully BPS AdS₂ × S² background. For half-BPS stationary configurations, we obtain the generalized stabilization equations expressing all fields in terms of harmonic functions on three-dimensional flat base space, extending the Lorentzian analysis of Cardoso et al. (hep-th/0009234) to the Euclidean signature. Our results provide a framework for studying supersymmetric saddles and computing the gravitational indices entirely within Euclidean higher-derivative supergravity, without recourse to analytic continuation.

We propose a novel topological vertex formalism for 5d ( mathcal{N}=1 ) SU(N) gauge theory with a hypermultiplet in the symmetric tensor representation, whose Type IIB brane construction involves an NS5-brane attached to an O7⁺-plane. Inspired by the identification O7⁺ ∼ ℤ₂ + 4D7, we introduce two new types of vertices: the ℤ₂-vertex, which implements the ℤ₂ orbifold action, and the FD-vertex, which encodes the monodromy cut induced by the O7⁺-plane. This formalism generalizes the framework presented in JHEP 04 (2025) 182 and establishes a systematic method for computing partition functions for 5-brane configurations that incorporate an O7⁺-plane. The resulting partition functions are expressed as sums over Young diagrams, providing a powerful computational tool for studying such gauge theories.

We propose a field-theoretic framework for ideal hydrodynamics of charged relativistic fluids formulated in terms of a complex scalar field defined on a spacelike hypersurface comoving with the fluid. In the normal phase, the dynamics of charge-carrying fluids is constrained by the restrictive chemical shift symmetry, which locks charges to fixed positions in the comoving plane as they are transported through space by the fluid’s motion. On the other hand, in the superfluid phase, the chemical shift symmetry is relaxed to a constant shift, allowing charges to redistribute freely across the comoving hypersurface. We demonstrate that both models recover the respective nonlinear hydrodynamic equations and provide explicit expressions for the collective variables of hydrodynamics in terms of the theory’s fields. Introduced models provide a UV completion to the effective field theories of hydrodynamics constructed in terms of the Goldstone fields. Finally, we propose a relativistic fracton fluid phase as a natural interpolation between the normal and superfluid phases, in which the mobility of elementary charges is constrained by a linear shift symmetry in the comoving space.

We present a unified free field realization of the Ding-Iohara algebra at arbitrary levels, which satisfies a generalized form of the Serre relations. This realization, constructed using six free boson fields, arises from a specialized factorization of the structure function in the defining relations of the algebra. Based on this construction, we then develop intertwining operators for the Ding-Iohara algebra.

Changes in magnetic helicity are often discussed across a variety of fields, from condensed matter physics to early universe cosmology. It is frequently stated that the helicity change is given by the integral of the gauge field strength tensor and its dual over spacetime, ∫ F ∧ F. However, this is incorrect when magnetic monopoles once existed in the spacetime. In this paper, we show the correct formula of the helicity change in such a case for the Maxwell theory with the magnetic monopoles. We also discuss what happens when we embed the Maxwell theory with magnetic monopoles into non-Abelian gauge theories. We show that a similar formula holds for the ’t Hooft-Polyakov monopole. In particular, we find the winding numbers and the zeroes of the Higgs field in the non-Abelian gauge theory play a crucial role in the helicity change. The same discussion is also applicable to the electroweak theory, and we discuss the implication of our findings to the baryon number change via the chiral anomaly in the early universe.

The vertex detector is crucial for precision measurements of the Higgs boson at the electron-positron Higgs factory. Benchmarked with ( Hto coverline{c} ) and ( Hto soverline{s} ) measurements in the ( nu overline{nu}H ) channel, we perform an optimisation study on the inner radius and spatial resolution of the vertex detector using the Jet Origin Identification (JOI) framework, which determines the parton flavour of jets using advanced Artificial Intelligence (AI) algorithm. We observe that, compared to the reference detector configuration, halving the inner radius and spatial resolution improves the transverse and longitudinal impact parameter resolution approximately by a factor of two, while increasing the accuracy and significance of the ( Hto coverline{c}/soverline{s} ) measurement by 4% and 8%, respectively. Conversely, doubling these parameters results in comparable degradation, with variations in the inner radius being the dominant factor. Our results provide guidance for detector design and highlight promising prospects for identifying the ( Hto soverline{s} ) decay mode at future Higgs factories.