hep-ex papers | Gist.Science

Hep-Ex explores the fascinating intersection where particle physics meets experimental reality. This field investigates how scientists build massive detectors and accelerate particles to test the fundamental laws of nature, turning abstract theories into measurable data. It is the rigorous process of searching for new particles or forces that could reshape our understanding of the universe, often requiring years of collaboration and engineering.

At Gist.Science, we ensure these discoveries become accessible to everyone. We process every new preprint in this category directly from arXiv, generating both plain-language explanations for curious readers and detailed technical summaries for specialists. Our goal is to bridge the gap between complex experimental results and public understanding without losing scientific nuance.

Below are the latest papers in Hep-Ex, freshly summarized and ready for you to explore.

⚛️ lattice

Why fluctuations of conserved charges in the confining regime above $T_{ch}$ behave as if the quarks were free?

This paper resolves the apparent contradiction between free-quark-like fluctuations of conserved charges and confined mesonic correlators above the chiral crossover by demonstrating that while mesonic propagation remains string-bound, conserved quark number densities effectively bypass confinement through quark interchanges between overlapping color-singlet clusters, a phenomenon analogous to quark-hadron duality.

L. Ya. Glozman2026-06-16

⚛️ lattice

Chiral-odd structure of the $N \to \Delta$ transition: tensor form factors from QCD light-cone sum rules

This paper presents the first direct calculation of the four tensor transition form factors for the $N \to \Delta$ transition using QCD light-cone sum rules, revealing distinct flavor decomposition patterns and providing model-independent chiral-odd inputs for future phenomenological analyses.

Ulaş Özdem2026-06-16

⚛️ high-energy experiments

Modification of heavy quark hadronization in high-multiplicity collisions at LHCb

This paper presents recent LHCb results showing that the significantly enhanced production ratios of heavy flavor hadrons (such as $D_{s}^{+}/D^{+}$ and $\Lambda_{b}^{0}/B^{0}$ ) in high-multiplicity collisions suggest a modification of the hadronization mechanisms in these events.

Chenxi Gu2026-06-16

⚛️ high-energy experiments

Recent results on open heavy flavor production ($pp$, $p$ Pb, PbPb) from LHCb

This paper presents recent LHCb results on open heavy flavor production in $pp$, $p$ Pb, and PbPb collisions, highlighting how these measurements probe QCD medium transport properties, cold nuclear matter effects, and hadronization mechanisms across a unique energy range.

Chenxi Gu2026-06-16

⚛️ high-energy experiments

Neutral kaon mass measurement with the CMD-3 derector at VEPP-2000

Using over 600,000 $K_{S}^{0}\to\pi^{+}\pi^{-}$ decays collected by the CMD-3 detector at the VEPP-2000 collider, researchers measured the neutral kaon mass to be 497.587 $\pm$ 0.004 (stat.) $\pm$ 0.008 (syst.) $\pm$ 0.009 (calibr.) MeV/ $c^2$ .

E. P. Solodov (Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, 630090, Russia, Novosibirsk State Technical Uni (…)2026-06-16

⚛️ high-energy experiments

${\mu}$ LHC: Antimuon Ring and HL-LHC based ${\mu}^+p$ Collider

This paper presents the conceptual design and performance evaluation of the ${\mu}$ LHC, a feasible HL-LHC-based antimuon-proton collider utilizing ultra-cold ${\mu}^{+}$ beam technology to achieve 5.3 TeV center-of-mass energy and high luminosity for exploring QCD, Higgs physics, and beyond-Standard-Model phenomena.

D. Akturk, A. C. Canbay, H. Dagistanli, B. Dagli, U. Kaya, B. Ketenoglu, A. Kilic, F. Kocak, A. Ozturk, S. Sultansoy, I. (…)2026-06-15

⚛️ high-energy experiments

First search for $B \rightarrow X_{s} \nu \bar{\nu}$ decays

Using 365 fb⁻¹ of data from the Belle II detector, the first search for the flavor-changing neutral-current decay $B \rightarrow X_{s} \nu \bar{\nu}$ was conducted via a sum-of-exclusives approach, yielding no significant signal and establishing an upper limit on the branching fraction of $3.3 \times 10^{-4}$ .

Belle II Collaboration, M. Abumusabh, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, Y. Ahn, H. Aihara, N. Akopov, S. Al (…)2026-06-15

⚛️ high-energy experiments

Differential decay rate of $B^+ \to J/\psi K^+$ with the LHCb Upgrade I experiment

Using a 1.1 fb $^{-1}$ data sample from the LHCb Upgrade I detector collected in October 2024, this paper measures the normalised decay rate and angular coefficients of the $B^+ \to J/\psi K^+$ process, demonstrating that the upgraded detector's response is sufficiently understood to reliably extract parameters for rare $b \to s \mu^+\mu^-$ and $b \to d \mu^+\mu^-$ transitions sensitive to physics beyond the Standard Model.

LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. Adefisoye, B. A (…)2026-06-15

⚛️ high-energy experiments

An interpretable unsupervised representation learning for high precision measurement in particle physics

The paper introduces the Histogram AutoEncoder (HistoAE), an unsupervised deep learning model with a custom histogram-based loss that creates a physically interpretable latent space for silicon microstrip detectors, achieving high-precision charge and position measurements comparable to conventional methods while enabling fast detector simulations.

Xing-Jian Lv, De-Xing Miao, Zi-Jun Xu, Jian-Chun Wang2026-06-15

⚛️ phenomenology

Conformal calibration and look-elsewhere effect in anomaly detection for new-physics searches

This paper proposes a conformal prediction-based calibration layer that transforms uncalibrated machine-learning anomaly scores into statistically rigorous, distribution-free local and global p-values, effectively correcting for background mismodeling and the look-elsewhere effect to prevent false discoveries in new-physics searches.

Jack Y. Araz, Michael Spannowsky2026-06-15

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hep-ex

Why fluctuations of conserved charges in the confining regime above TchT_{ch}Tch​ behave as if the quarks were free?

Chiral-odd structure of the N→ΔN \to \DeltaN→Δ transition: tensor form factors from QCD light-cone sum rules

Modification of heavy quark hadronization in high-multiplicity collisions at LHCb

Recent results on open heavy flavor production ($pp$, pppPb, PbPb) from LHCb

Neutral kaon mass measurement with the CMD-3 derector at VEPP-2000

μ{\mu}μLHC: Antimuon Ring and HL-LHC based μ+p{\mu}^+pμ+p Collider

First search for B→XsννˉB \rightarrow X_{s} \nu \bar{\nu}B→Xs​ννˉ decays

Differential decay rate of B+→J/ψK+B^+ \to J/\psi K^+B+→J/ψK+ with the LHCb Upgrade I experiment

An interpretable unsupervised representation learning for high precision measurement in particle physics

Conformal calibration and look-elsewhere effect in anomaly detection for new-physics searches

Why fluctuations of conserved charges in the confining regime above $T_{ch}$ behave as if the quarks were free?

Chiral-odd structure of the $N \to \Delta$ transition: tensor form factors from QCD light-cone sum rules

Recent results on open heavy flavor production ($pp$, $p$ Pb, PbPb) from LHCb

${\mu}$ LHC: Antimuon Ring and HL-LHC based ${\mu}^+p$ Collider

First search for $B \rightarrow X_{s} \nu \bar{\nu}$ decays

Differential decay rate of $B^+ \to J/\psi K^+$ with the LHCb Upgrade I experiment