Nuclear Theory·nucl-th

Friday·May 15, 2026

10 papers—5 primary·5 cross-listed

06
[Submitted on 12 May 2026] (cross-list from hep-ph)
Radiative decays of the 1 $P$ , 1 $D$ , 2 $S$ , and 2 $P$ $Λ_{c}$ and 1 $D$ , 2 $S$ , and 2 $P$ $Ξ_{c}$ charmed baryons
R. Gamboa-Goni🇲🇽 · Ailier Rivero-Acosta🇲🇽 · H. García-Tecocoatzi🇲🇽 · A. Gutierrez-Rodriguez🇲🇽 · A. Ramirez-Morales🇲🇽 · E. Santopinto🇮🇹 · Carlos Alberto Vaquera-Araujo🇲🇽
We analyze the radiative decays of the the 1 $P$ , 1 $D$ , 2 $S$ , and 2 $P$ $Λ_{c}$ and 1 $D$ , 2 $S$ , and 2 $P$ $Ξ_{c}$ charmed baryons, which belong to the flavor anti-triplet ( $3 ˉ_{F}$ ), using the constituent quark model. We compute electromagnetic transitions from ground and $P$ -wave states to ground states, as well as from second-shell states to both ground and $P$ -wave final states. Electromagnetic decay widths are especially valuable for identifying resonances when multiple states share the same mass and total decay width. We give branching ratios which can confirm the assignment of the $Ξ_{c} (3055)$ reported by LHCb. We also give branching ratios that can support the assignment of the $Ξ_{c} (3080)$ , and discuss the possibilities for the $Ξ_{c} (3080)$ to be the 1 $D$ state with $J^{P} = 5/ 2^{+}$ or the 2 $S$ with $J^{P} = 1/ 2^{+}$ . For the first time, this work provides calculations of electromagnetic decays for $D_{ρ}$ -wave states, $ρ - λ$ mixed configurations, and $ρ$ -mode radially excited states in singly charmed baryons of the flavor anti-triplet. Both experimental and model-dependent uncertainties are taken into account throughout our analysis.
Comments:
16 pages, 2 figures
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2605.13903 [pdf]
PRD(2026)·0 citations
07
[Submitted on 13 May 2026] (cross-list from hep-ph)
Diquark Correlators and Phase Structure in the Quark-Meson-Diquark Model beyond Mean Field
Ugo Mire🇩🇪 · Bernd-Jochen Schaefer🇩🇪
A comprehensive study of the phase structure of the two-flavor quark-meson-diquark model is presented within the nonperturbative functional renormalization group framework. The influence of mesonic fluctuations beyond the mean-field approximation is investigated, and two-point functions of the diquark fields are computed at finite real-time frequencies. Renormalization group consistency of the effective potential is ensured in order to avoid cutoff artifacts. Substantial modifications of the phase structure are found once mesonic fluctuations are included, and for sufficiently strong diquark couplings the dynamics become dominated by diquark condensation. These effects are elucidated through an analysis of the diquark pole mass and the Silver-Blaze property.
Comments:
23 pages, 8 figures, 2 tables, v2: corrected author name formatting
Subjects:
High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th)
arXiv:
2605.13934 [pdf]
2 citations
08
[Submitted on 13 May 2026] (cross-list from hep-ph)
Matching collinear factorization with color-glass condensate for inclusive and exclusive deep inelastic scattering
Shohini Bhattacharya🇺🇸 · Chuan-Qi He🇨🇳 · Zhong-Bo Kang🇺🇸 · Diego Padilla🇺🇸 · Jani Penttala🇺🇸
Collinear factorization and color-glass condensate (CGC) effective field theory are generally treated as separate approaches for calculating scattering amplitudes, valid in different kinematic regimes. For deep inelastic scattering at high photon virtuality and high center-of-mass energy, however, both of these approaches should be applicable. By expressing collinear parton distributions and generalized parton distributions in the shockwave approximation, we show that the resulting collinear-factorization amplitudes exactly reproduce the large- $Q^{2}$ expansion of CGC amplitudes for inclusive deep inelastic scattering, deeply virtual Compton scattering, and deeply virtual meson production. The matching holds directly at the amplitude level and includes both logarithmically enhanced and finite contributions. Our results establish the consistency between collinear factorization and the CGC in their common region of validity, clarify the origin of large momentum logarithms within the CGC framework, and provide a path toward combining high-energy and collinear evolution in a unified description of hadronic structure at small $x$ and large momentum scales.
Comments:
11 pages
Subjects:
High Energy Physics — Phenomenology (hep-ph); Nuclear Theory (nucl-th)
arXiv:
2605.14092 [pdf]
1 citation
09
[Submitted on 14 May 2026] (cross-list from nucl-ex)
NA61/SHINE results on search for critical point
Nikolaos Davis🇵🇱
The NA61/SHINE experiment at the CERN SPS is a multipurpose fixed-target spectrometer for charged and neutral hadron measurements. Its research program includes studies of strong interactions as well as reference measurements for neutrino and cosmic-ray physics. One major goal of its strong interaction program is to determine the existence and pinpoint the location of the QCD critical point, an object of both experimental and theoretical studies. This contribution will summarize the current status of NA61/SHINE critical point searches in nucleus-nucleus collisions, in the collision energy range $s_{N N} = 5 - 17$ ~GeV. The review includes studies of fluctuations of net-electric charge, femtoscopy analysis of $π - π$ pairs, as well as intermittency of protons and negatively charged hadrons. No clear indication of the critical point has been observed so far. Finally, we report on the development of novel methods aimed at solving the long-standing problem of bin-by-bin correlations in experimental intermittency analysis, and for a more accurate handling of systematics and uncertainties.
Comments:
Presented at XXXII Cracow Epiphany Conference on the recent results from Heavy Ion Physics, 12-16 Jan 2026, IFJ PAN, Kraków, Poland; for the NA61/SHINE Collaboration; 8 pages, 5 figures
Subjects:
Nuclear Experiment (nucl-ex); High Energy Physics — Experiment (hep-ex); Nuclear Theory (nucl-th)
arXiv:
2605.14737 [pdf]
0 citations
10
[Submitted on 14 May 2026] (cross-list from quant-ph)
Deforming the Trail: Baseline Quantum Circuitry for $SU(2)_{k}$ Lattice Gauge Theory
Zoë Webb-Mack🇺🇸 · Natalie Klco🇺🇸
Quantifying quantum resources for simulating the fundamental forces of Nature is sensitive to the mapping of gauge fields onto finite quantum computational architectures. When locally truncating lattice gauge theories in the irreducible representation basis, it has been proposed to further deform the theory via quantum groups. The purpose of this deformation is (1) to provide an infinite tower of finite-dimensional ( $d = k + 1$ ) groups systematically approximating the infinite-dimensional gauge links and (2) to restore the physical unitarity of a plaquette operator diagonalization procedure analytically derived from the field continuum by recontracting vertex pairs. For the SU(2) $_{k}$ Yang-Mills pure-gauge theory, we provide a constructive strategy of gauge-variant completions to extend this unitarity to the entire computational Hilbert space, leading to well-defined time evolution unitaries as targets for optimized circuit synthesis. Leveraging basic circuit decompositions and symmetries of the diagonalized plaquette operator, we report resource upper-bounds on the generalized-controlled-X two-qudit gates for arbitrary local truncation $d$ , reducing estimates and scaling relative to the non-deformed theory by three polynomial powers from $O (d^{8})$ to $O (d^{5})$ . Examining the stronger q-deformed gauge constraint, which softens the total flux at vertices, we show that the physical Hilbert space dimension of the deformed plaquette operator scales equivalently to its non-deformed counterpart with a constant factor $0.2563 (5)$ . Thus, despite affecting interactions at all scales as exemplified by the observed flux hierarchy inversion symmetry, q-deformation continues to pass scrutiny as a reliable truncation offering advantages in quantum circuit synthesis.
Comments:
35 pages, 8 figures, 3 appendices
Subjects:
Quantum Physics (quant-ph); High Energy Physics — Lattice (hep-lat); Nuclear Theory (nucl-th)
arXiv:
2605.15076 [pdf]
3 citations

Affiliations

first authorsco-authorsvia INSPIRE

Radiative decays of the 1P, 1D, 2S, and 2P Λc​ and 1D, 2S, and 2P Ξc​ charmed baryons

Diquark Correlators and Phase Structure in the Quark-Meson-Diquark Model beyond Mean Field

Matching collinear factorization with color-glass condensate for inclusive and exclusive deep inelastic scattering

NA61/SHINE results on search for critical point

Deforming the Trail: Baseline Quantum Circuitry for SU(2)k​ Lattice Gauge Theory

Affiliations

Radiative decays of the 1 $P$ , 1 $D$ , 2 $S$ , and 2 $P$ $Λ_{c}$ and 1 $D$ , 2 $S$ , and 2 $P$ $Ξ_{c}$ charmed baryons

Deforming the Trail: Baseline Quantum Circuitry for $SU(2)_{k}$ Lattice Gauge Theory