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Nuclear Theory·nucl-th

Wednesday·February 25, 2026

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 04

    Resummed azimuthal decorrelation and transverse momentum imbalance of dijets at the LHC

    Rong-Jun Fu🇨🇳 · Rudi Rahn🇦🇹 · Ding Yu Shao🇨🇳 · Wouter J. Waalewijn🇳🇱 · Bin Wu🇪🇸

    We present a theoretical study of the azimuthal decorrelation and transverse momentum imbalance in dijet production at the LHC, offering intriguing insights into the dynamics of quantum chromodynamics. We define the jet axes using the recoil-free winner-take-all (WTA) recombination scheme. For the azimuthal decorrelation , this axis choice eliminates non-global logarithms (NGLs) entirely. For the transverse momentum imbalance , NGLs emerge specifically in the small jet radius limit (). In this regime, the WTA scheme simplifies the theoretical framework by restricting jet radius logarithms to the soft sector. We derive factorization formulae for both observables within soft-collinear effective theory. To address the small- NGLs in the distribution, we refactorize the soft function into global soft, collinear-soft, and ultra-collinear-soft modes. We perform the resummation of global large logarithms and up to next-to-next-to-leading logarithmic accuracy. For the distribution, this is combined with a leading-logarithmic resummation of the non-global terms. We match our predictions to leading fixed-order calculations. We also numerically investigate the structure of the first subleading power corrections. Comparisons with PYTHIA8 simulations demonstrate that the observables we consider are robust against non-perturbative multi-parton interactions and hadronization effects.

    ↳ hep-phhep-exnucl-thJHEP(2026)·4 citations
  2. 05

    Resolving the structure of bound states using lattice quantum field theories

    Joseph Moscoso🇺🇸 · Felipe G. Ortega-Gama🇺🇸 · Raúl A. Briceño🇺🇸 · Andrew W. Jackura🇺🇸 · Charles Kacir🇺🇸 · Amy N. Nicholson🇺🇸

    This work presents the first lattice calculation of a two-to-two particle matrix element of a local current. This exploratory calculation is performed using a leading-order pionless effective field theory of two nucleons in a finite 3D spatial volume, where the Hamiltonian can be diagonalized exactly for moderate volumes. By considering a range of couplings where the theory supports a deuteron-like bound state, we determine the finite-volume spectra and matrix elements of the conserved local vector current. Using the Lüscher formalism, we constrain the infinite-volume, purely hadronic amplitude for this theory. Using previously derived formalism, we then map the finite-volume matrix elements to scattering amplitudes describing a reaction coupling two-particle states via a current insertion, . We then use a recently derived relation between this class of amplitudes and the bound-state elastic form factor to directly constrain the infinite-volume form factor. By varying over a range of values of the coupling of the theory, we explore the effects of this analysis for deep-bound states and shallow-bound states. We reproduce the expected result that for deep bound states, the finite-volume formalism is largely unnecessary, while for shallow bound states, it is absolutely critical to obtain a sensible result. We present a detailed outline of the analysis of this class of matrix elements, including the determination of the charge radius of the bound state. In the shallow bound state limit, we find good agreement with the prediction stemming from the anomalous threshold.

    ↳ hep-latnucl-th6 citations
  3. 06

    Spatial confinement-deconfinement transition in accelerated gluodynamics within lattice simulation

    Victor V. Braguta🇷🇺 · Vladimir A. Goy🇷🇺 · Jayanta Dey🇷🇺 · Artem A. Roenko🇷🇺

    In this work we investigate the influence of weak acceleration on the confinement-deconfinement phase transition in gluodynamics. Our study is carried out within lattice simulation in the comoving reference frame of accelerated observer which is parameterized by the Rindler coordinates. We find that finite temperature confinement-deconfinement phase transition turns into spatial crossover in the Rindler spacetime. In other words, spatially separated confinement and deconfinement phases can coexist in the Rindler spacetime within certain intervals of temperature and acceleration. We determine the position of the boundary between the phases as a function of temperature for several accelerations and find that it can be described by the Tolman-Ehrenfest law with rather good accuracy although a minor deviation takes place. Moreover, the critical temperature of the system in the weak acceleration regime is found to remain unchanged as that of the standard homogeneous gluodynamics. Our results imply that the spatial confinement-deconfinement transition might take place in the vicinity of the Schwarzschild black hole horizon.

    ↳ hep-latgr-qchep-phhep-th+1PRD(2026)·8 citations

Affiliations

first authorsco-authorsvia INSPIRE