Nuclear Theory·nucl-th

Wednesday·July 23, 2025

9 papers—5 primary·4 cross-listed

06
Quantum Scaling in Energy Correlators Beyond the Confinement Transition
Cyuan-Han Chang🇺🇸 · Hao Chen🇺🇸 · Xiaohui Liu🇨🇳 · David Simmons-Duffin🇺🇸 · Feng Yuan🇺🇸 · Hua Xing Zhu🇨🇳
We study the QCD scaling behavior of the small-angle Energy-Energy Correlator (EEC), focusing on the transition between its perturbative pre-confinement and non-perturbative post-confinement regimes. Applying the light-ray Operator Product Expansion (OPE), we develop a formalism that describes the scaling of the EEC with the input energy $Q$ in the transition and the post-confinement region, where the latter quantum scaling is determined by the $J = 5$ DGLAP anomalous dimension. A key result of our work is a novel connection between the light-ray OPE and the dihadron fragmentation function (DFF), where we show that the non-perturbative OPE coefficients correspond to moments of the DFF. This finding establishes a new paradigm for studying hadronization. Our theoretical predictions are validated against Monte Carlo simulations for both $e^{+} e^{-}$ and $pp$ collisions, showing excellent agreement. The potential role of the quantum scaling in the precision determination of $α_{s}$ is also discussed.
↳ hep-phhep-exhep-thnucl-ex+1PRL(2026)·30 citations
07
Extracting Essential Non-perturbative Information in Jet Invariant Mass via the Bayesian Analysis
Zhan Gao🇨🇳 · Yu Shi🇨🇳 · Bo-Wen Xiao🇨🇳 · Han-Zhong Zhang🇨🇳
In this paper, we present a new three-dimensional non-perturbative (NP) function to account for and parameterize the NP contributions in the jet invariant mass spectrum, in addition to the conventional NP mass shift parametrization. By implementing Bayesian analysis on experimental data of the jet invariant mass from exclusive $W / Z +$ jet events and inclusive jet events in $pp$ collisions at RHIC and LHC, where collisional energy increases by a factor of up to $65$ from RHIC to LHC, we ensure the analysis covers a wide range of data. For the first time, we simultaneously extract NP contributions from hadronization, initial soft-gluon radiation, and underlying events, based on two different NP prescriptions. We find that the contribution from initial soft-gluon radiation is negligible, and the hadronization effect dominates in the small- $R$ region, while underlying events provide the dominant contribution in the large- $R$ region. Moreover, when only hadronization effects are considered, our results successfully describe the jet mass data measured in $e^{+} e^{-}$ collisions, where only hadronization effects are expected to be present. Our work offers quantitative insights into understanding the soft hadronic contribution to jet substructure.
↳ hep-phhep-exhep-thnucl-th1 citation
08
Correlation function for the $n D ˉ_{s 0}^{*} (2317)$ interaction and the issue of elastic unitarity
Natsumi Ikeno🇯🇵 · Eulogio Oset🇪🇸
We study the interaction of a neutron with the $D ˉ_{s 0}^{*} (2317)$ resonance and look at the amplitude below threshold and close above threshold. The study is done from the perspective that the $D_{s 0}^{*} (2317)$ resonance is a molecular state of $D K$ in $I = 0$ . To study this interaction, we use the Fixed Center Approximation to Faddeev equations that considers the $D K$ molecule as the cluster and the neutron as the external particle. We improve the Fixed Center approach to implement elastic unitarity around threshold, which is needed to obtain scattering parameters and to evaluate the $n D ˉ_{s 0}^{*} (2317)$ correlation function that we determine here. One interesting result of the study is the appearance of a resonant state below threshold with a binding of about 130 MeV and a width of about 80 MeV, which we suggest to look at in reactions measuring the invariant mass of $π Σ D ˉ$ . The ALICE collaboration has initiated studies of this type, by looking at the $p f_{1} (1285)$ correlation function, and we can only encourage work in this direction which should provide much valuable information on the nature of many resonant states.
↳ hep-phnucl-exnucl-thPRD(2025)·12 citations
09
Di- $J / ψ$ structures from the quark Pauli-blocking effect
Sachiko Takeuchi · Atsushi Hosaka · Makoto Takizawa · Yasuhiro Yamaguchi
The double-charmonium scattering states such as $J / ψ J / ψ$ , $η_{c} J / ψ$ , and $η_{c} η_{c}$ are investigated by a simplified quark cluster model. It is found that the quark Pauli-principle over the $c c ˉ c c ˉ$ system causes a rapid increase and a node in the two-meson phase shifts. The increase is not large enough to be regarded as a resonance, but if it is seen experimentally, that is most likely the quark Pauli-blocking effect.
↳ hep-phnucl-thPoS(2025)·2 citations

Affiliations

first authorsco-authorsvia INSPIRE

Quantum Scaling in Energy Correlators Beyond the Confinement Transition

Extracting Essential Non-perturbative Information in Jet Invariant Mass via the Bayesian Analysis

Correlation function for the nDˉs0∗​(2317) interaction and the issue of elastic unitarity

Di-J/ψ structures from the quark Pauli-blocking effect

Affiliations

Correlation function for the $n D ˉ_{s 0}^{*} (2317)$ interaction and the issue of elastic unitarity

Di- $J / ψ$ structures from the quark Pauli-blocking effect