Mon·Jan 5, 2026Monday·January 5, 2026

1. 01*

   Study the property of $W^{\prime }$ at future $e^{-}p$ collider

   Xinyi Yan🇨🇳 · Honglei Li🇨🇳 · Zhi-Long Han🇨🇳 · Fei Huang🇨🇳 · Ruiyu Xing🇨🇳

   As a strong candidate for new physics beyond the Standard Model, the exotic charged gauge boson $W^{\prime }$ has attracted extensive research interest. In this work we investigate the interactions of the $W^{\prime }$ boson at the electron-proton colliders. The process $e^{-}u\to {\nu }_{e}d$ and $e^{-}u\to e^{\pm }jjj$ with $t$-channel $W^{\prime }$ exchange are studied. The polarization of the initial-state electrons has a significant impact on the cross section of the studied process, while the angular distribution of the final-state leptons serves as an important observable for the interactions of the $W^{\prime }$ boson. In some specific regions of the parameter space, the detectable mass range for the $W^{\prime }$ boson can reach around 10 TeV, and the coupling strength can achieve a precision of approximately 1\% relative to the interaction strength of the Standard Model. Especially, $e^{-}u\to e^{+}jjj$ process is forbidden within the Standard Model, which would constitute important evidence in the search for the Left-Right Symmetric Model.

   hep-phPRD(2026)·0 citations
2. 02*

   Two-body nonleptonic decays of ${\Omega }_b\to {\Omega }_c$ beyond tree level

   Z. Neishabouri🇮🇷 · K. Azizi🇮🇷 · H. R. Moshfegh🇮🇷

   We study the nonleptonic decays of ${\Omega }_b\to {\Omega }_{c}P(V)$ with eight pseudoscalar and vector mesons using the naive factorization approach. We analyze all relevant topologies (the tree-level, color-suppressed, and penguin) of these decays and calculate the decay amplitude for each separately. We determine the decay rates, branching ratios and compare our results with those from other theoretical predictions. The results obtained may be useful for the analysis of the related data in both ongoing and future experiments.

   hep-phhep-exhep-latPRD(2026)·2 citations
3. 03*

   Qubits and Vacuum Amplitudes

   Germán Rodrigo🇪🇸

   High-energy colliders, such as the Large Hadron Collider (LHC) at CERN, are genuine quantum machines, so, in line with Richard Feynman's original motivation for Quantum Computing, the scattering processes that take place there are natural candidates to be simulated on a quantum system. Potential applications range from quantum machine learning methods for collider data analysis, to faster and more precise evaluations of intricate multiloop Feynman diagrams, more efficient jet clustering, improved simulations of parton showers, and many other tasks. In this work, the focus will be on two specific applications: first, the identification of the causal structure of multiloop vacuum amplitudes, a key ingredient of the Loop-Tree Duality and an area with deep connections to graph theory; and second, the integration and sampling of high-dimensional functions. The latter constitutes a first step toward the realization of a fully fledged quantum event generator operating at high perturbative orders.

   hep-phhep-exquant-phActa Phys.Polon.Supp.(2026)·1 citation
4. 04*

   Dark Dimension Right-handed Neutrinos Confronted with Long-Baseline Oscillation Experiments

   Ai-Yu Bai🇨🇳 · Auttakit Chatrabhuti🇹🇭 · Yin-Yuan Huang🇨🇳 · Hiroshi Isono🇹🇭 · Jian Tang🇨🇳

   Right-handed neutrinos are naturally induced by dark extra dimension models and play an essential role in neutrino oscillations. The model parameters can be examined by the long-baseline neutrino oscillation experiments. In this work, we compute the predicted neutrino oscillation spectra within/without extra dimension models and compare them with the experimental data. We find that the neutrino data in the T2K and NOvA experiments are compatible with the standard neutrino oscillation hypothesis. The results set the stringent exclusion limit on the extra dimension model parameters at a high confidence level. The derived constraints on dark dimension right-handed neutrinos are complementary to those results from the collider experiments and cosmological observations.

   hep-phastro-ph.COgr-qchep-thJHEP(2026)·4 citations
5. 05*

   How to Trust Learned Loop Amplitudes

   Henning Bahl🇩🇪 · Jens Braun🇩🇪 · Gudrun Heinrich🇩🇪 · Tilman Plehn🇩🇪 · Rebecca Revelli🇩🇪

   Higher-order theory predictions are crucial for the precision LHC program, but the time-consuming amplitude evaluation challenges the corresponding Monte-Carlo simulations. Machine-learned amplitude surrogates can resolve this problem, if we can guarantee their precision over the entire phase space. First, we show that our surrogates provide a calibrated learned uncertainty, even for non-Gaussian systematics; second, we describe how less accurate phase space regions can be identified; third, we demonstrate how the precision in these regions can be improved reliably.

   hep-ph13 citations
6. 06*

   Is the Conventional Picture of Coherence Time Complete? Dark Matter Recoherence

   Chaitanya Paranjape🇮🇱 · Gilad Perez🇮🇱 · Wolfram Ratzinger🇮🇱 · Somasundaram Sankaranarayanan🇮🇱

   The local solar gravitational potential forms a basin for ultralight dark matter (ULDM), with discrete energy levels. Even if barely populated, it introduces a new characteristic timescale in DM dynamics. This necessitates a generalization of the notion of coherence time. We find that, at long times, the phenomenon of recoherence emerges, whereby a subcomponent of ULDM exhibits a formally divergent coherence time. The fact that this generalized coherence time can significantly exceed the naive estimate implies an enhanced sensitivity for dark matter searches that accumulate data over extended observation periods.

   hep-phastro-ph.SRquant-ph0 citations
7. 07*

   Late Time Magnetogenesis from Ultralight Scalar Dark Matter

   V. Kamali🇨🇦 · R. Brandenberger (McGill University)🇨🇦

   Assuming that Dark Matter is an ultralight scalar field which is coupled to electromagnetism via a gauge-kinetic function and which at the time of recombination is oscillating coherently over a Hubble patch, we show that there is a tachyonic instability for the gauge field modes which leads to the generation of magnetic fields on cosmological scales of sufficient amplitude to explain observations.

   ↳ astro-ph.COgr-qchep-phhep-th8 citations
8. 08*

   One loop renormalization of 5D gauge-Yukawa theories

   Giacomo Cacciapaglia🇫🇷 · Wanda Isnard🇫🇷 · Roman Pasechnik🇸🇪 · Anca Preda🇸🇪

   The common lore dictates that extra dimensional theories loose predictive power at energies just above the compatification scale, due to the power-law running of bulk coupling. We show that five-dimensional gauge-Yukawa theories can be valid up to arbitrarily high scales, provided: 1) A finite number of terms are required to absorb power-law divergences; 2) All power-law running couplings flow to UV fixed points. By explicitly computing bulk and localized divergences for a gauge-Yukawa theory on ${\mathcal{S}}^1/{\mathbb{Z}}_2$, we prove the one-loop renormalization properties of Lagrangians containing only interactions that would be renormalizable in four dimensions. The existence of UV fixed points imposes further constraints on the content of the model. Our results provide a consistency check for the high-energy behavior of any 5D theory, and provide a discrimination between UV consistent models and those that can describe only a handful of Kaluza-Klein modes. Hence, we offer the first concrete step towards an all-order proof of `renormalizability' for gauge-Yukawa theories in five dimensions.

   ↳ hep-thhep-ph0 citations
9. 09*

   Effective field theory for dissipative photons from higher-form symmetries

   Genki Yoshimura🇯🇵 · Yukinao Akamatsu🇯🇵 · Yuji Hirono🇯🇵

   Recent developments in generalized symmetries have provided new insights into quantum field theories. Within this framework, photons can be understood as Nambu-Goldstone modes associated with a spontaneously broken higher-form symmetry. In this work, we develop an effective field theory that builds on this symmetry structure to describe the real-time dynamics of photons in insulating media at finite temperature. Combining the Schwinger-Keldysh formalism with the generalized coset construction, we formulate a symmetry-based effective action that incorporates both conservative and dissipative effects. The effective theory implements the dynamical Kubo-Martin-Schwinger symmetry, ensuring consistency with the fluctuation-dissipation relation and Onsager's reciprocal relations. Within this framework, we derive the entropy current associated with dissipative photon dynamics and demonstrate the non-negativity of its divergence, in accordance with the second law of thermodynamics. We also clarify the symmetry origin of the gauge redundancy in the unbroken phase within the Schwinger-Keldysh framework, relating it to strong and weak realizations of higher-form symmetries. Our results provide a model-independent effective description of photon dynamics in insulating media at finite temperature.

   ↳ hep-thcond-mat.mes-hallcond-mat.str-elhep-ph+1JHEP(2026)·4 citations
10. 10*

    On Cosmological Correlators at One Loop

    Guilherme L. Pimentel🇮🇹 · Tom Westerdijk🇮🇹

    We study equal-time in-in correlators of massless scalar fields in flat space at one loop. Using the time-ordered decomposition of correlators together with a cosmological analogue of the Baikov representation, we systematically construct relatively simple loop integrals and make manifest why, in this setting, loop corrections to correlators are simpler than those of wavefunction coefficients. As benchmark examples, we analyse the bubble and triangle diagrams. The bubble exhibits a UV divergence that can be removed by a local counterterm, while the triangle yields a finite result, which we evaluate explicitly in terms of dilogarithms using an integral transform for the Laplacian Green's function. We classify the kinematic singularities of these diagrams using Landau analysis, identifying novel types of singular behaviour, and validate this analysis against the explicit results. Finally, we derive a factorisation property of one-loop cosmological correlators at singular kinematics, relating them to flat-space loop amplitudes and lower-point tree-level correlators.

    ↳ hep-thastro-ph.COhep-ph13 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.