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Observation of $Λ^+_c\to nπ^+η$ and search for $Λ^+_c\to na_0(980)^+$

BESIII Collaboration; Ablikim, M.; Achasov, M. N. et al.

arXiv · 2026 · English · arXiv

By analysing 6.1 ${\rm fb}^{-1}$ of data collected at center-of-mass energies between $\sqrt{s}=4.600$ and 4.843 $\rm GeV$ with the BESIII detector at the BEPCII collider, we observe the decay $Λ_c^+\to nπ^+η$ for the first time with a statistical significance of $9.5σ$. The ratio of branching…

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TwinMixing: A Shuffle-Aware Feature Interaction Model for Multi-Task Segmentation

Do, Minh-Khoi; Che, Huy; Phan, Dinh-Duy et al.

arXiv · 2026 · English · arXiv

Accurate and efficient perception is essential for autonomous driving, where segmentation tasks such as drivable-area and lane segmentation provide critical cues for motion planning and control. However, achieving high segmentation accuracy while maintaining real-time performance on low-cost…

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Quasi-local probability averaging in the context of cutoff regularization

Ivanov, A. V.; Korenev, I. V.

arXiv · 2026 · English · arXiv

In this paper, we study the properties of averaged fundamental solutions of a special type for Laplace operators in the Euclidean space of an arbitrary dimension. We consider a class of kernels suitable for probabilistic averaging, and propose new representations for the deformed fundamental…

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Weighing the mass of LHS 3844 b

Hacker, Alejandro; Astudillo-Defru, Nicola; Díaz, Rodrigo F. et al.

arXiv · 2026 · English · arXiv

Context: LHS 3844 b (TOI-136 b) is a ultra short-period, Earth-size exoplanet detected by TESS. It is one of the most favourable object for atmospheric characterisation and the study of its surface with the James Webb Space Telescope. However, the dynamical mass of this planet has not been measured…

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Mass determination of the ultra-short-period planet LHS 3844 b. First K-band radial velocity measurements with CRIRES+

Nagel, E.; Köhler, J.; Zechmeister, M. et al.

arXiv · 2026 · English · arXiv

We present the first planet mass measurement obtained with CRIRES+ radial velocity (RV) observations using the K-band gas cell. Our target, LHS 3844 b (TOI-136), is a transiting super-Earth with radius $R_b=1.286^{+0.043}_{-0.044}R_\oplus$ and an orbital period of $P_b =…

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Off-Axis Compliant RCM Joint with Near-Isotropic Stiffness and Minimal Parasitic Error

Mariano, Federico; De Momi, Elena; Berselli, Giovanni et al.

arXiv · 2026 · English · arXiv

This paper presents an off-axis, monolithic compliant Remote Center of Motion (RCM) joint for neuroendoscopic manipulation, combining near-isotropic stiffness with minimal parasitic motion. Based on the Tetra II concept, the end-effector is placed outside the tetrahedral flexure to improve line of…

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Evidence for multiple scattering effects in the electron mobility in dense argon gas

Borghesani, A. F.; Lamp, P.

arXiv · 2026 · English · arXiv

We report measurements of the electron drift mobility in dense argon gas over an extended range of densities, temperatures, and electric fields, supplementing our earlier work. The measurements confirm the validity of the heuristic model we previously developed by introducing multiple scattering…

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Cyclic sieving phenomena on parabolic classes of faces of the cluster complex

Pouillart, Lucas

arXiv · 2026 · English · arXiv

The cyclic sieving phenomenon was introduced by Reiner, Stanton and White in 2004 as a generalization of Stembridge's $q=-1$ phenomenon. In a paper from 2008, Eu and Fu studied many occurrences of this phenomenon on the faces of the generalized cluster complex with the action of the Fomin-Reading…

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Cost-Matching Model Predictive Control for Efficient Reinforcement Learning in Humanoid Locomotion

Cai, Wenqi; Vamvoudakis, Kyriakos G.; Gros, Sébastien et al.

arXiv · 2026 · English · arXiv

In this paper, we propose a cost-matching approach for optimal humanoid locomotion within a Model Predictive Control (MPC)-based Reinforcement Learning (RL) framework. A parameterized MPC formulation with centroidal dynamics is trained to approximate the action-value function obtained from…

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Universal Modular Properties of Generalized Gibbs Ensembles and Chiral Deformations

Ashok, Sujay K.; Sengupta, Tanmoy; Sudhakar, Adarsh et al.

arXiv · 2026 · English · arXiv

We study modular properties of conformal field theories perturbed by holomorphic fields. We prove an asymptotic formula for the modular S-transform of a generalized partition function that includes zero modes of higher spin holomorphic currents. The derivation makes use of general properties of…

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Topological Valley-Reshaped Device: Bifunctional Waveguiding and Single-Beam Leaky-Wave Radiation for Terahertz Communication

Wu, Yulun; Wang, Ziwei; Chong, Faqian et al.

arXiv · 2026 · English · arXiv

Topological photonics has emerged as a powerful platform for terahertz on-chip systems due to its robust waveguiding capabilities. However, directly extracting topological valley-locked edge states into directional free-space radiation without auxiliary couplers while preserving guided-wave…

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Voice-Controlled Scratch for Children with (Motor) Disabilities

Goller, Elias; Fraser, Gordon; Graßl, Isabella

arXiv · 2026 · English · arXiv

Block-based programming environments like Scratch have become widely adopted in Computer Science Education, but the mouse-based drag-and-drop interface can challenge users with disabilities. While prior work has provided solutions supporting children with visual impairment, these solutions tend to…

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Reasoning as Energy Minimization over Structured Latent Trajectories

Johansson, David K.

arXiv · 2026 · English · arXiv

Single-shot neural decoders commit to answers without iterative refinement, while chain-of-thought methods introduce discrete intermediate steps but lack a scalar measure of reasoning progress. We propose Energy-Based Reasoning via Structured Latent Planning (EBRM), which models reasoning as…

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Effects of gravity on lean hydrogen/air flame instability: From linear scaling law to nonlinear morphology evolution

Wen, Qizhe; Wang, Yan; Yang, Linlin et al.

arXiv · 2026 · English · arXiv

The instability characteristics of lean hydrogen/air flames have attracted considerable research attention, yet the effect of gravity remains insufficiently understood. In this study, time-resolved two-dimensional simulations with detailed chemistry and transport are conducted to investigate the…

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Resonant two-cluster scattering in a quasi-one-dimensional Bose gas

Tanaka, Tomohiro; Nishida, Yusuke

arXiv · 2026 · English · arXiv

We investigate two-cluster scattering in a quasi-one-dimensional Bose gas. We focus on the effective three-body interaction induced by transverse confinement, which is the leading term for breaking integrability in the quasi-one-dimensional setting. Exploiting the Lüscher formula and the…

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Secret Key Rate Analysis of RIS-Assisted THz MIMO CV-QKD Systems under Localized and Global Eavesdropping

Kumar, Sushil; Dash, Soumya P.; Alexandropoulos, George C.

arXiv · 2026 · English · arXiv

A multiple-input multiple-output (MIMO) system operating at terahertz (THz) frequencies and consisting of a transmitter, Alice, that encodes secret keys using Gaussian-modulated coherent states, which are communicated to a legitimate receiver, Bob, under the assistance of a reconfigurable…

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MuonEq: Balancing Before Orthogonalization with Lightweight Equilibration

Chang, Da; Shi, Qiankun; Zhang, Lvgang et al.

arXiv · 2026 · English · arXiv

Orthogonalized-update optimizers such as Muon improve training of matrix-valued parameters, but existing extensions mostly act either after orthogonalization by rescaling updates or before it with heavier whitening-based preconditioners. We introduce {\method}, a lightweight family of…

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Framework for identifying the equivalence between Nature-Inspired Metaheuristics

Fister, Iztok; Hozjan, Žan; Fister, Jr., Iztok et al.

arXiv · 2026 · English · arXiv

The domain of metaheuristic optimization has become vibrant due to a flood of new algorithms using a new nature-inspired metaphor but lacking clear methodological novelty. The Criticism behind the development of these algorithms has reached such an extent that the critics started to assert that all…

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Contingent Claim Valuation under Increasing Profit, Strong Arbitrage, and Arbitrage of the First Kind

Tsuzuki, Yukihiro

arXiv · 2026 · English · arXiv

We study the upper hedging price for contingent claims in market models with strong types of arbitrage: increasing profit, strong arbitrage, and arbitrage of the first kind. The existence of arbitrage may make the price smaller than if it did not exist. For example, when the asset price process has…

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Nonlinear Factor Decomposition via Kolmogorov-Arnold Networks: A Spectral Approach to Asset Return Analysis

Breazu, David

arXiv · 2026 · English · arXiv

KAN-PCA is an autoencoder that uses a KAN as encoder and a linear map as decoder. It generalizes classical PCA by replacing linear projections with learned B-spline functions on each edge. The motivation is to capture more variance than classical PCA, which becomes inefficient during market crises…

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