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Physics Preprint PDF DOI

Deeply virtual pion production through two-loop order

Wen Chen, Feng Feng, Yu Jia, Qing-Tao Song, Guang Tang, Zhe-Yu Wang · 2026

Deeply virtual meson production (DVMP) is among the most prominent channels to extract the nucleon's generalized parton distributions (GPDs) at $ep$ scattering facilities such as {\tt JLab} and the up…

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Physics Preprint PDF DOI

Phenomenology of $f_2(1270)$ photoproduction at energies measured with the CLAS facility

K. E. S. Mendes, D. T da Silva, M. L. L. da Silva · 2026

We investigate the photoproduction of the tensor meson $f_2(1270)$ on the proton within a Regge-based framework, focusing on the reaction $\gamma p \to p f_2(1270)$ in the few-GeV energy region. The p…

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Physics Preprint PDF DOI

Chiral Symmetry and Its Restoration in QCD

Teiji Kunihiro · 2026

Starting with describing the Dirac equation in an unconventional manner, we introduce the notion of chirality and show how chiralities are mixed in the massive Dirac particles.Then we discuss the appr…

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Physics Preprint PDF DOI

Mesogenesis through the Ephemeral Dark Decay of Beauty

Hooman Davoudiasl, Rachel Houtz, Seyda Ipek · 2026

Mesogenesis provides a path for generating the baryon asymmetry of the Universe, using only the CP violation furnished by the Standard Model in the decay of $B$ mesons. While this is an intriguing pos…

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Physics Preprint PDF DOI

Null Tests and Lepton Universality in $\Xi_{cc}$ Baryon Decays

Hindi Zouhair · 2026

We develop a precision framework for doubly charmed baryon decays based on symmetry-protected observables and effective-field-theory diagnostics. In nonleptonic $\Xi_{cc}$ decays, we construct a null …

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Physics Preprint PDF DOI

Particle seismology: mechanical and gravitational properties from parton-hadron duality

Enrique Ruiz Arriola, Wojciech Broniowski · 2026

The internal structure of hadrons is characterized by form factors which correspond to matrix elements of currents. Among those, the stress-energy-momentum tensor is a universally conserved quantity p…

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Physics Preprint PDF DOI

Integrable Deformations of the Breitenlohner-Maison Model from 4d Chern-Simons Theory

Meer Ashwinkumar, Matthias Blau · 2026

We derive integrable deformations of the 2d Breitenlohner-Maison (BM) sigma model that describes the stationary, axisymmetric sector of 4d general relativity, as well as higher-rank generalisations th…

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Physics Preprint PDF DOI

Semileptonic $B_q$ decays to heavy tensor mesons

Pietro Colangelo, Fulvia De Fazio, Carlo la Torre, Giuseppe Roselli · 2026

The semileptonic decays of $B_q$ mesons ($q=u,d,s$) to $J^P=2^+$ charmed mesons are investigated. The form factors parametrising the hadronic matrix elements of the weak vector and axial-vector quark …

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Physics Preprint PDF DOI

Radiative charmonium decays in a contact-interaction model with dynamical quark anomalous magnetic moment

Yehan Xu, Zanbin Xing, Khepani Raya, Lei Chang · 2026

The BESIII Collaboration has recently reported two measurements of the two-photon decay width of the $\eta_c$ meson. The 2024 result is significantly larger than most theoretical and empirical expecta…

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Physics Preprint PDF DOI

Determination of heavy meson light-cone distribution amplitudes: theoretical framework and lattice simulations

Hao-Fei Gao, Xue-Ying Han, Jun Hua, Xiangdong Ji, Xiangyu Jiang, Cai-Dian Lu, Andreas Schafer, Jin-XinTan, Ji-Hao Wang, Wei Wang, Ji Xu, Yi-Bo Yang, Fu-Wei Zhang, Jian-Hui Zhang, Jia-Lu Zhang, Mu-Hua Zhang, Qi-An Zhang, Shuai Zhao · 2026

We present a first-principles determination of heavy meson light-cone distribution amplitudes (LCDAs) from lattice QCD in the continuum limit, improving substantially on our previous pioneering study.…

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Physics Preprint PDF DOI

Axion-like particle-meson production in semileptonic $\tau$ decays

Yu-Xuan Bai, Jin Hao, Zhi-Hui Guo · 2026

In this work we explore the semileptonic $\tau$ decays into the axion-like particle ($a$)-meson final states within chiral effective field theory. The next-to-leading-order mixing matrix for the $\pi^…

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Physics Preprint PDF DOI

Determination of the $Z_c(3900)$ and the $Z_{cs}(3985)$ states from joint analysis of experimental and lattice data

Yun-Hua Chen, Meng-Lin Du, Feng-Kun Guo · 2026

We present a unified analysis of the $Z_c(3900)$ and $Z_{cs}(3985)$ states considering both experimental and lattice data. The study simultaneously includes the processes $e^+e^- \rightarrow J/\psi \p…

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A study of $J/\psi$ mass shift and bound states: Impact of $D D$ and $DD^*$ meson loops

Manpreet Kaur, Arvind Kumar · 2026

We investigate the modification of the $J/\psi$ meson mass in asymmetric nuclear matter at zero and finite temperatures employing an effective Lagrangian approach that considers the contributions of $…

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Physics Preprint PDF DOI

The Angular Observables of $\Lambda_b \to \Lambda_c(\to \Lambda^0 \pi^+) \, \tau^-(\to \pi^- \nu_\tau)\, \bar{\nu}_\tau$ within the Paradigm of FCCC Anomalies

Muhammad Arslan, Ishtiaq Ahmed, Muhammad Jamil Aslam · 2026

We present a global analysis of the current $B$-meson flavor anomalies and extend it to the baryonic sector through the decay $\Lambda_b^0 \to \Lambda_c^+(\to \Lambda^0 \pi^+) \tau^-(\to \pi^- \nu_\ta…

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Physics Preprint PDF DOI

Next-to-next-to-leading QCD corrections to the $\mathbf{B^+}$-$\mathbf{B_d^0}$, $\mathbf{D^+}$-$\mathbf{D^0}$, and $\mathbf{D_s^+}$-$\mathbf{D^0}$ lifetime ratios

Francesco Moretti, Ulrich Nierste, Pascal Reeck, Matthias Steinhauser · 2026

The total decay widths of heavy mesons can be systematically calculated in terms of an expansion in the two parameters $1/m_Q$ and $\alpha_s(m_Q)$, where $Q=c,b$ denotes the heavy quark. The dominant …

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Physics Preprint PDF DOI

Mass spectra of charged mesons and the quenching of vector meson condensation via exact phase-space diagonalization

Jingyi Chao, Kun Xu · 2026

We investigate the dynamics and mass spectra of charged pseudoscalar ($\pi^+$) and vector ($\rho^+$) mesons in a background magnetic field at finite temperature using the two-flavor Nambu-Jona--Lasini…

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Physics Preprint PDF DOI

Field-theoretical description of the deuteron breakup in the clothed particle representation

O. Shebeko, A. Arslanaliev, Y. Kostylenko, V. Chahar, J. Golak, H. Kamada, W. N. Polyzou, D. Ramirez, R. Skibinski, K. Topolnicki, H. Wita{l}a · 2026

We present a field-theoretical description of the deuteron electrodisintegration reaction d(e,e'p)n induced by unpolarized and polarized electrons. The approach combines the Lehmann-Symanzik-Zimmerman…

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Physics Preprint PDF DOI

Role of heavy neutral lepton in lepton number violating $B$ meson decays

Dhiren Panda, Manas Kumar Mohapatra, Rukmani Mohanta · 2026

We study the phenomenology of heavy neutral leptons (HNLs) in $B$-meson decays as probes of physics beyond the Standard Model. Focusing on the leptonic channels $B \to \mu N$ and $B \to \tau N$, we co…

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Physics Preprint PDF DOI

How to understand $\rho$ Resonance from the Quark Model and $\pi\pi$ $P$-wave phase shift

Wen-Ze Zhao, Ru-Hui Ni, Jia-Jun Wu · 2026

As the lightest isovector vector meson, the $\rho$ meson is an important object for investigating the structure of resonant states in strong interactions. Owing to its strong coupling to the $\pi\pi$ …

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Physics Preprint PDF DOI

Hard Probes in Ultraperipheral Collisions at LHCb

Krista Smith (on behalf of the LHCb Collaboration) · 2026

Measurements of quarkonia production in peripheral and ultraperipheral heavy-ion collisions are sensitive to photon-photon and photon-nucleus interactions, the partonic structure of nuclei, and the me…

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