Nuclear Theory·nucl-th

Tuesday·August 18, 2026

20 papers—12 primary·8 cross-listed

13
Energy Correlators in $V + X$ as a Benchmark Observable for Precision QCD
Terry Generet🇬🇧 · Kyle Lee🇺🇸 · Ian Moult🇺🇸 · Rene Poncelet🇵🇱 · Xiaoyuan Zhang🇺🇸
We propose projected energy correlators measured on the recoiling QCD radiation of a $Z / γ$ as a benchmark observable for precision QCD at the LHC. Using the $Z / γ$ as a hard scale prevents the need for a jet algorithm, simplifying both the perturbative and non-perturbative corrections. We develop a framework to combine state-of-the-art fixed-order amplitudes, high order resummation, and universal non-perturbative matrix elements. Our approach is based on numerically computed inclusive hard functions, allowing flexibility in the process and the inclusion of realistic experimental cuts. We perform detailed numerical studies of the projected energy correlators at next-to-leading order + next-to-next-to-leading logarithm (NLO+NNLL) to verify the stability of our setup. We present numerical results at NLO+NNLL, which are the first complete matched predictions for energy correlators at the LHC at this order. We discuss the prospects for extensions to higher orders, outlining a path to NNLO calculations of energy correlators at the LHC.
↳ hep-phhep-exnucl-th0 citations
14
Radiative corrections to neutron $β$ decay with explicit $Δ (1232)$ degrees of freedom
Lemonia Gialidi🇳🇱 · Emanuele Mereghetti🇺🇸 · Jordy de Vries🇳🇱
We study electromagnetic radiative corrections to neutron $β$ decay within chiral perturbation theory extended to include the $Δ (1232)$ resonance as an explicit degree of freedom. Building on a previous analysis performed in the $Δ$ -less theory, we identify and compute additional loop contributions with intermediate $Δ$ states at leading and next-to-leading order in the small-scale expansion, and match the results to the pionless effective field theory. We find that the electromagnetic shift in the axial coupling is reduced by approximately a factor of two compared to the $Δ$ -less result. The correction remains at the percent level and is phenomenologically significant for the comparison between experimental extractions and lattice-QCD determinations of the nucleon axial charge. We also obtain a new $Δ$ -induced contribution to the weak magnetism term, which is an order of magnitude smaller than the pion-loop result and negligible for upcoming experiments.
↳ hep-phhep-latnucl-th1 citation
15
Spin-dependent polarizabilities of heavy vector mesons
Hao Dang🇨🇳 · Liang-Zhen Wen🇨🇳 · Yan-Ke Chen🇨🇳 · Shi-Lin Zhu🇨🇳
We investigate the spin-dependent electromagnetic polarizabilities of the heavy vector mesons $D^*$ and $B^*$ in heavy meson chiral perturbation theory up to $\mathcal O(p^3)$. Using a twelve-element tensor basis for the real-photon Compton scattering on a spin-1 target, we determine two scalar, four vector and six tensor polarizabilities. We take the charm- and bottom-sector axial couplings from the measured $D^*$ width and lattice-QCD calculations, respectively, and estimate the magnetic couplings in the nonrelativistic constituent-quark model. In the charm sector, the proximity of the charged $D\pi$ thresholds generates strongly nonanalytic $P\phi$-loop contributions, producing large real contributions to several $\bar D^{*0}$ polarizabilities and sizable imaginary parts for $D^{*-}$, whose charged $D\pi$ channel is open. The $E1E1$-type polarizabilities are enhanced much more strongly than their $M1M1$-type counterparts, consistent with the velocity suppression of the pion-cloud magnetic coupling. No analogous enhancement occurs for $B^*$: the Born terms govern the magnetic polarizabilities, and the anomaly poles dominate the vector polarizabilities that receive no Born contribution. These results resolve the spin dependence of the $D\pi$ threshold effect and provide benchmarks for future lattice-QCD studies.
↳ hep-phhep-latnucl-th0 citations
16
Limiting cases of second-order moments of relativistic stars and their universality
Koutarou Kyutoku🇯🇵
Extending the work presented in a workshop ``From Quarks to Neutron Stars: Insights from kHz gravitational waves'', we discuss some limiting cases of the moment of inertia, tidal deformability, and spin-induced quadrupole moment for relativistic stars. First, conjecturing that a hierarchy of the length scale is the key to proposed universality among these second-order moments, we revisit the relation for incompressible relativistic stars (known as Schwarzschild's interior solution) as a candidate of the possible stiff limit. Second, we present the limiting form for the weak-field limit. In particular, we demonstrate how relativistic computations of tidal deformation are related to the traditional Newtonian counterpart, which might not have been presented explicitly in the literature.
↳ gr-qcastro-ph.HEnucl-thClass.Quant.Grav.(2026)·0 citations
17
Jump-Diffusion Stochastic Quantization for Euclidean Lattice Field Theories
Alexander Rothkopf🇰🇷
We construct the natural generalization of stochastic quantization (in the Markovian sense) by considering jump-diffusion processes. This class of stochastic processes exhibits non-continuous paths, so-called Lévy flights. In the presence of jumps, action landscapes with barriers can be efficiently explored, improving and even restoring ergodicity where traditional diffusion approaches become inefficient. We explore different strategies for constructing efficient jump updates, which we deploy to address the benchmark problem of topological freezing in 2d U(1) gauge theory.
↳ hep-latcond-mat.dis-nnnucl-thphysics.comp-ph0 citations
18
Rotation modified QCD equation of state across crossover at finite chemical potential
S. Ipsita Sahoo🇮🇳 · Sanjeebani Biswal🇮🇳 · Dipanwita Dutta🇮🇳 · Dipak Kumar Mishra🇮🇳
It is well-established that at low baryon chemical potential, the transition from the confined hadronic phase to the deconfined partonic phase is a smooth crossover rather than a first or second-order phase transition. We develop a thermodynamically consistent hybrid equation of state to study the effect of global rotation on the equation of state across the QCD crossover that interpolates the hadronic and partonic phases. The temperature dependence of normalized thermodynamic observables, such as entropy density ( $s / T^{3}$ ), pressure ( $P / T^{4}$ ), energy density ( $ε / T^{4}$ ), specific heat ( $C_{V} / T^{3}$ ), and the square of speed of sound ( $c_{s}^{2}$ ) in presence of rotation are investigated. The effect of non-zero chemical potential on thermodynamic quantities in presence of rotation is also studied. Our results show that increasing chemical potential enhances the thermodynamic quantities, whereas rotation suppresses them in the crossover region. Further, we investigate the effect of rotation on the conserved numbers susceptibilities and their correlations as a function of temperature. The susceptibilities and their correlations exhibit a systematic enhancement with increase in rotation in both the hadronic and partonic phases. These findings provide new insights into the interplay between rotation and QCD thermodynamics, which can have important implications for rapidly rotating strongly interacting matter produced in ultra-relativistic heavy-ion collisions.
↳ hep-phnucl-exnucl-th0 citations
19
Chiral Soliton Lattices under Magnetic Fields and Rotation: a Holographic Analysis
Markus A. G. Amano🇧🇩 · Minoru Eto🇯🇵 · Muneto Nitta🇯🇵 · Shin Sasaki🇯🇵
We study the chiral soliton lattice (CSL) in rotating QCD matter under a background magnetic field within holographic QCD. We show that rotation can be incorporated as a background gauge field and that the CSL in rotating matter becomes a ground state in the gravity dual. We also provide a brane interpretation of the CSL under a magnetic field and rotation. Solving the bulk equations, we derive an effective Hamiltonian where the meson decay constant $f ~$ emerges as an anisotropic, field-dependent matrix. Furthermore, we discuss the thermodynamic properties of the ground state in rotating matter and study its equation of state.
↳ hep-thnucl-th2 citations
20
Quantum Simulation of QCD in Axial Gauge
Xiaojun Yao🇺🇸
We study quantum simulation of SU(3) non-Abelian gauge theory dynamically coupled with fundamental fermions in $3 + 1$ dimensions by employing the lattice Hamiltonian in axial gauge that avoids Gauss's law constraints. The temporal component of the gauge field is analytically solved in terms of independent field degrees of freedom and a lattice regulated Green's function. The axial gauge condition is trivially maintained in time evolution, even under Trotterization. The gauge field degrees of freedom are expressed in the local field basis and can be efficiently transformed into the canonical conjugate momentum basis by local quantum Fourier transforms. We prove the number of qubits needed for describing all states up to an energy $E$ with an accuracy $ϵ$ on a lattice of volume $V$ at bare coupling $g$ is bounded as $16 n_{A} V + 12 n_{f} V$ , where $n_{A} \approx lo g_{2} (\frac{64 E ^{'} V ^{4/3}}{π ^{2} ϵ} + \frac{32 2 g n _{f} E ^{' 1/2} V ^{7/6}}{3 π ^{3} ϵ ^{1/2}})$ is the number of qubits needed for each independent gauge field per site with a shifted energy $E^{'}$ , and $n_{f}$ denotes the number of fermion flavors. We then analyze a quantum algorithm for time evolution that is based on Trotterization, quantum Fourier transform, and Jordan-Wigner transformation, for which quantum circuits can be explicitly constructed under arbitrary gauge field truncation and digitization. We find the numbers of CNOT and single-qubit rotation gates both scale as $O (n_{A}^{4} V^{4/3}) + O (V^{5/3})$ per Trotter step for fixed $n_{f} \leq 6$ . We conclude that quantum resources needed for simulating real-time dynamics of lattice QCD scale polynomially with volume, energy, time, accuracy, and bare Hamiltonian parameters.
↳ hep-lathep-phhep-thnucl-th+11 citation

Affiliations

first authorsco-authorsvia INSPIRE