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Nuclear Theory·nucl-th

Wednesday·March 19, 2025

13 papers—6 primary·7 cross-listed

All13Primary6Cross-lists7
  1. 07

    Isospin sum rules for bottom-baryon weak decays

    Wei-Chen Fu🇨🇳 · Si-Jia Wen🇨🇳 · Di Wang🇨🇳

    Isospin symmetry, as the most precise flavor symmetry, can be used to extract information about hadronic dynamics. The effective Hamiltonian operators of bottom quark weak decays are zero under a series of isospin lowering operators , which permits us to generate isospin sum rules without the Wigner-Eckart invariants. In this work, we derive hundreds of isospin sum rules for the two- and three-body non-leptonic decays of bottom baryons. They provide hints for new decay modes and the isospin partners of pentaquark states.

    ↳ hep-phnucl-thEPJC(2025)·3 citations
  2. 08

    Dissecting Jet Modification in the QGP with Multi-Point Energy Correlators

    João Barata🇨🇭 · Ian Moult🇺🇸 · Andrey V. Sadofyev🇵🇹 · João M. Silva🇵🇹

    Energy correlators have recently attracted significant attention in the study of heavy ion collisions due to their potential to robustly connect experimental measurements with an underlying quantum field theoretic description. While theoretical studies have so far primarily focused on the simplest two-point correlator, mapping out the dynamics of the quark-gluon plasma (QGP) will require developing a theoretical understanding of multi-point energy correlators. In this paper we present a systematic theoretical study of multi-point energy correlators for jets fragmenting in a dense quark-gluon plasma, accounting for both the medium's perturbative modification to the jet, and its hydrodynamical back-reaction. We consider both the scaling behavior of projected correlators, as well as the shape dependent three-point correlator, highlighting how both provide insight into interactions with the QGP. We discuss the parametric dependence of modifications on the medium scales, opening new opportunities to experimentally separate jet modifications from the medium response. Our results open the door to a systematic exploration of multi-point energy correlators in heavy ion collisions.

    ↳ hep-phnucl-thPRL(2026)·32 citations
  3. 09

    Comprehensive Analysis of Constructing Hybrid Stars with an RG-consistent NJL Model

    Jan-Erik Christian🇩🇪 · Ishfaq Ahmad Rather🇩🇪 · Hosein Gholami🇩🇪 · Marco Hofmann🇩🇪

    In this work, we investigate the properties of hadronic and quark matter that would allow for a first order phase transition between them within neutron stars. To this end, we use a parameterizable Relativistic Mean-Field (RMF) description for the hadronic phase and a Renormalization Group-consistent Nambu-Jona-Lasino (RG-NJL) model for the quark phase. This also enables us to consider sequential phase transitions involving a two-flavor color-superconducting (2SC) and a color-flavor-locked (CFL) phase. We find large ranges for all parameters that facilitate a phase transition, even when constrained by current astrophysical data. We further attempt to filter out stars with a high chance of detectability by mass-radius measurement, i.e., stars with identical mass but different radii, so-called twin stars. However, we find that such configurations are outside the constrained parameter spaces. Instead, most of the mass-radius relations that feature a phase transition appear to be indistinguishable from a purely hadronic description.

    ↳ astro-ph.HEnucl-thAstron.Astrophys.(2025)·30 citations
  4. 10

    Investigations of symmetry breakings by multiple condensates on exotic chiral condensed phases

    Joshua Murakami (Kochi Univ., Japan)🇯🇵 · Kentaro Hayashi (Kochi Univ., Japan)🇯🇵 · Yasuhiko Tsue (Kochi Univ., Japan)🇯🇵

    The Nambu-Goldstone modes on the exiotic chiral condensed phase with chiral and tensor-type quark-antiquark condensates are investigated by using of the two-point vertex functions. It is shown that one of the Nambu-Goldstone modes appears as a result of meson-mixing. As is well known, another method to find the Nambu-Goldstone modes is given by the use of the algebraic commutation relations between broken generators and massless modes obtained through the spontaneous symmetry breaking. This method is adopted to the cases of the chiral symmetry breakings due to the tensor-type condensate and the inhomogeneous chiral condensate. The result obtained by the use of the meson two-point vertex functions is obviously reproduced in the case of the tensor-type condensate. Furthermore, we investigate the general rules for determining the broken symmetries and the Nambu-Goldstone modes algebraically. As examples, the symmetry breaking pattern and the Nambu-Goldstone modes due to the tensor-type condensate or the inhomogeneous chiral condensate are shown by adopting the general rules developed in this paper in the algebraic method.

    ↳ hep-phnucl-thPRD(2025)·0 citations
  5. 11

    Lattice Monte Carlo meets lattice functional Renormalization Group: A quantitative comparison

    Niklas Zorbach🇩🇪 · Jan Philipp Klinger🇩🇪 · Owe Philipsen🇩🇪 · Jens Braun🇩🇪

    Lattice Monte Carlo (MC) simulations and the functional Renormalization Group (RG) are powerful approaches that allow for quantitative studies of non-perturbative phenomena such as bound-state formation, spontaneous symmetry breaking and phase transitions. While results from both methods have recently shown remarkable agreement for many observables, e.g., in Quantum Chromodynamics, an analysis of deviations in certain quantities turns out to be challenging. This is because calculations with the two methods are based on different approximations, regularizations and scale fixing procedures. In the present work, we present a framework for a more direct comparison by formulating the functional RG approach on a finite spacetime lattice. This removes all ambiguities of regularization, finite size and scale fixing procedures in concrete studies. By investigating the emergence of spontaneous symmetry breaking and phase transitions in a scalar theory in spacetime dimensions, we demonstrate at the example of the local potential approximation how this framework can be used to evaluate and compare the systematic errors of both approaches.

    ↳ hep-lathep-phhep-thnucl-thPRD(2025)·3 citations
  6. 12

    Double parton interactions initiated by direct photons in and collisions revisited

    B. Blok (Technion)🇮🇱 · R. Segev (Technion)🇮🇱

    We consider the double parton scattering (DPS) initiated by direct photons in and collisions. We extend the previously known results for photoproduction to the case of electroproduction with nonzero photon virtuality , and then consider the DPS for both photo and electroproduction for HERA and IEC ( electron ion collider) kinematics. The number of DPS events at IEC is shown to be of the same order as in HERA and is even larger, with increase in luminocity compensating the decrease of the center of mass energy.

    ↳ hep-phhep-exnucl-exnucl-thPRD(2026)·4 citations
  7. 13

    Strategic White Paper on AI Infrastructure for Particle, Nuclear, and Astroparticle Physics: Insights from JENA and EuCAIF

    Sascha Caron🇳🇱 · Andreas Ipp🇦🇹 · Gert Aarts🇬🇧 · Gábor Bíró🇭🇺 · Daniele Bonacorsi🇮🇹 · Elena Cuoco🇮🇹 · Caterina Doglioni🇬🇧 · Tommaso Dorigo🇸🇪 · Julián García Pardiñas🇺🇸 · Stefano Giagu🇮🇹 · Tobias Golling🇨🇭 · Lukas Heinrich🇩🇪 and 7 other authors

    Artificial intelligence (AI) is transforming scientific research, with deep learning methods playing a central role in data analysis, simulations, and signal detection across particle, nuclear, and astroparticle physics. Within the JENA communities-ECFA, NuPECC, and APPEC-and as part of the EuCAIF initiative, AI integration is advancing steadily. However, broader adoption remains constrained by challenges such as limited computational resources, a lack of expertise, and difficulties in transitioning from research and development (R&D) to production. This white paper provides a strategic roadmap, informed by a community survey, to address these barriers. It outlines critical infrastructure requirements, prioritizes training initiatives, and proposes funding strategies to scale AI capabilities across fundamental physics over the next five years.

    ↳ astro-ph.IMastro-ph.HEcs.AIcs.LG+3Mach.Learn.Sci.Tech.(2026)·5 citations

Affiliations

first authorsco-authorsvia INSPIRE