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Nuclear Theory·nucl-th

Thursday·May 28, 2026

13 papers—9 primary·4 cross-listed

All13Primary9Cross-lists4
  1. 10

    Multiplicity distributions in DIS for heavy nucleus

    Carlos Contreras🇨🇱 · José Garrido🇨🇱

    We found solutions to the linear but with complicated kernel and non-homogeneous evolution equations for the cross sections of productions of -cut Balitsky-Fadin-Kuraev-Lipatov (BFKL) Pomerons in the final states of high energy DIS on a nucleus, resumming all multiple rescatterings in the leading logarithmic approximation. For the model leading-twist BFKL kernel, we calculate analytical solutions of these equations by developing the homotopy approach. We also calculate the solution in the large and large limits, where is the dipole size, the saturation scale and is the average multiplicity of the produced gluons. Having these cross sections we calculate the multiplicity distributions of the produced gluons and describe how the upcoming Electron-Ion Collider (EIC) can test our theoretical formalism.

    ↳ hep-phnucl-thJ.Subatomic Part.Cosmol.(2026)·1 citation
  2. 11

    Learning shape resonances from the stabilization method

    Daniel Kromm · Hans-Werner Hammer · Artem Volosniev

    Resonances in quantum mechanics are commonly introduced as quasi-bound states embedded in the continuum, a perspective that can be conceptually challenging due to the abstract nature of continuum states. In this work, we discuss an alternative approach that avoids an explicit treatment of the continuum by formulating the problem in terms of discrete quantum states. Our discussion is based on the stabilization method, in which the system is confined to a finite region such that the continuum is replaced by a discrete energy spectrum. Resonances then appear as characteristic features in the energy levels under variation of the confining box size, providing an intuitive interpretation in terms of a two-level system while remaining closely connected to standard quantum mechanics curriculum. We review the method, derive selected results, and discuss practical strategies for extracting resonance parameters from stabilization diagrams. In addition to established fitting procedures, we introduce a novel approach based on the analysis of spatial localization of resonant states, which enables a robust identification of resonance properties. The approach is illustrated using both attractive and repulsive delta-shell potentials, which serve as simple and instructive model systems amenable to analytical treatment.

    ↳ quant-phnucl-thphysics.ed-ph0 citations
  3. 12

    The origin of excited states of the baryon at the SU(3) point from Lattice QCD

    Javier Suarez Sucunza🇩🇪 · Thomas Luu🇩🇪 · Maxim Mai🇨🇭 · Ferenc Pittler🇨🇾 · Carsten Urbach🇩🇪 · Haobo Yan🇨🇳

    In this work we determine the finite-volume lattice QCD spectrum at the flavor symmetric point in the meson-baryon singlet and octet irreducible representations. We construct the appropriate interpolation operators and perform the calculation on ensembles in quite large volume (). We find three below-threshold energy levels, with the singlet having lower energy and the two octets being non-degenerate at one sigma, which for these large volumes () strongly suggests a bound state close to that energy at each of the irreducible representations. We confront this finite-volume spectrum with the prediction from UCHPT through the Lüscher method finding qualitative agreement. Finally we perform a re-fit of UCHPT free parameters to the available (experimental and lattice) data including the energy levels calculated in this work. This allows us to follow the pole trajectories to the physical point, identifying the as a lower octet, and as a singlet bound state in the limit. Furthermore, is identified on a qualitative level as the heavier octet bound state and its relation to three-body final states is discussed.

    ↳ hep-lathep-phnucl-th0 citations
  4. 13

    Fractional short-time dynamics in driven quantum gases

    Uri Sharell · Tilman Enss

    Quantum gases with short-range attractive interaction tend to form pairs. For time-dependent interaction we find that the pairing amplitude at small separation satisfies a fractional differential equation (FDE). We derive analytic solutions of the pairing evolution for sudden interaction quenches and power-law drives toward resonant scattering. We observe universal short-time dynamics governed by a nonrelativistic conformal fixed point at which the momentum distribution exhibits self-similar dynamic scaling, in quantitative agreement with experiment. At longer times, many-body effects induce relaxation toward an equilibrium state. In this limit, the FDE turns into a Müller-Israel-Stewart type equation that describes a hydrodynamic attractor approaching equilibrium.

    ↳ cond-mat.quant-gasnucl-th1 citation

Affiliations

first authorsco-authorsvia INSPIRE