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.

Neutrinoless double beta decays of hyperons in covariant chiral perturbation theory

This paper investigates neutrinoless double beta decays of spin-1/2 hyperons using covariant baryon chiral perturbation theory, finding that while long-range one-loop amplitudes exist, the leading contributions arise from short-range counterterm operators and result in branching ratios far below current experimental limits.

Zi-Ying Zhao, Ze-Rui Liang, Feng-Kun Guo, Li-Ping He, De-Liang Yao2026-02-10⚛️ hep-lat

Charge asymmetry in $e^{+}e^{-}\to B^{()}\bar{B}^{()}$ processes in the vicinity of $Υ(4S)$

This paper analyzes charge asymmetry in $e^{+}e^{-}\to B^{(*)}\bar{B}^{(*)}$ processes near the $\Upsilon(4S)$ resonance using a six-channel final-state interaction model, demonstrating that isotopic invariance violation and interference effects lead to significant deviations in the production cross-section ratios of neutral versus charged $B$ mesons.

S. G. Salnikov, A. I. Milstein2026-02-10⚛️ hep-ex

Constraints on Higgs Light Yukawa Couplings with the CMS Detector

This paper presents the latest direct and indirect measurements from the CMS experiment regarding the challenging task of constraining light Higgs Yukawa couplings, such as the Higgs-charm coupling, and discusses future prospects for improvement.

Alberto Zucchetta2026-02-10⚛️ hep-ex

Global observables and identified-hadron production in pp, O-O and Pb-Pb collisions at LHC Run 3 energies with EPOS4

This paper presents EPOS4 model predictions for pp, O-O, and Pb-Pb collisions at LHC Run 3 energies, demonstrating that the dynamical core-corona approach and hadronic-phase effects (via UrQMD) are essential for describing the non-universal scaling of transverse momentum, identified-hadron spectra, and nuclear modification factors across different system sizes.

Hirak Kumar Koley, Mitali Mondal2026-02-10⚛️ hep-ex

Constraints on non-standard neutrino interactions from Borexino extended data-set

This paper presents an updated analysis of the Borexino Phase-III data set to provide improved constraints on flavor-diagonal non-standard neutrino interactions and offers a first-of-its-kind comprehensive exploration of all possible off-diagonal NSI terms.

V. Antonelli, D. Basilico, G. Bellini, J. Benziger, R. Biondi, B. Caccianiga, F. Calaprice, A. Caminata, A. Chepurnov, D. D'Angelo, A. Derbin, A. Di Giacinto, V. Di Marcello, X. F. Ding, A. Di Ludovic (…)2026-02-10⚛️ hep-ex

Observation of $ψ(3686) \to n\bar{n}$ and improved measurement of $ψ(3686) \to p \bar{p}$

Using a sample of $1.07\times 10^8$ $ψ(3686)$ events collected by the BESIII detector, this study reports the first observation of the decay $ψ(3686) \to n\bar{n}$ and provides improved measurements of the branching fractions and polar angular distribution parameters for both $ψ(3686) \to n\bar{n}$ and $ψ(3686) \to p\bar{p}$ decays.

M. Ablikim, M. N. Achasov, S. Ahmed, M. Albrecht, D. J. Ambrose, A. Amoroso, F. F. An, Q. An, J. Z. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, D. W. Bennett, J. V. Bennett, N. Berger, M. Bertani, D. (…)2018-03-06⚛️ hep-ex

Observation of the Semileptonic Decay $D^0 \to a_0(980)^- e^+ ν_e$ and Evidence for $D^+ \to a_0(980)^0 e^+ ν_e$

Using 2.93 fb $^{-1}$ of $e^+e^-$ collision data collected by the BESIII detector, this study reports the first observation of the semileptonic decay $D^0 \to a_0(980)^- e^+ ν_e$ and provides evidence for $D^+ \to a_0(980)^0 e^+ ν_e$ , while determining their respective absolute branching fractions.

BESIII Collaboration, M. Ablikim, M. N. Achasov, S. Ahmed, M. Albrecht, A. Amoroso, F. F. An, Q. An, J. Z. Bai, Y. Bai, O. Bakina, R. Baldini Ferroli, Y. Ban, D. W. Bennett, J. V. Bennett, N. Berger (…)2018-03-06⚛️ hep-ex

A novel method for lepton energy calibration at Hadron Collider Experiments

This paper presents a novel method for improving lepton energy calibration at hadron collider experiments by introducing additional parameterization terms and reducing parameter correlations through kinematic separation of $Z/\gamma^* \to \ell^+\ell^-$ samples, thereby achieving higher precision while remaining faster and simpler than detailed detector simulations.

Siqi Yang, Usha Mallik, Liang Han, Weitao Wang, Jun Gao, Minghui Liu2018-03-06⚛️ hep-ex

Axion Searches with Microwave Filters: the RADES project

The RADES project proposes and validates a novel axion haloscope design using an array of interconnected microwave cavities arranged as a filter to effectively search for dark matter axions in the 10–100 $\mu$ eV mass range, demonstrating its potential through a five-cavity prototype currently operating within the CAST magnet at CERN.

Alejandro Álvarez Melcón, Sergio Arguedas Cuendis, Cristian Cogollos, Alejandro Díaz-Morcillo, Babette Döbrich, Juan Daniel Gallego, Benito Gimeno, Igor G. Irastorza, Antonio José Lozano-Guerrero, Chl (…)2018-03-03⚛️ hep-ex

Selection and processing of calibration samples to measure the particle identification performance of the LHCb experiment in Run 2

This paper outlines the novel strategy developed by the LHCb experiment during Run 2 to select and process calibration samples using a dedicated online-offline computing model, enabling precise measurement of particle identification performance and data-quality monitoring across various decay channels.

Roel Aaij, Lucio Anderlini, Sean Benson, Marco Cattaneo, Philippe Charpentier, Marco Clemencic, Antonio Falabella, Fabio Ferrari, Marianna Fontana, Vladimir Gligorov, Donal Hill, Thibaud Humair, Chris (…)2018-03-02⚛️ hep-ex

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