⚛️ Category

hep-ex

2101 papers

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.

⚛️ high-energy experiments

Search for CPCP violation in Ξc+→Σ+h+h−Ξ_c^+\toΣ^+h^+h^- and Λc+→ph+h−Λ_c^+\to ph^+h^- at Belle II

Using 428 fb−1^{-1} of data from the Belle II experiment, this study presents the first measurements of CPCP asymmetries in singly-Cabibbo-suppressed three-body decays of charmed baryons (Ξc+→Σ+h+h−\Xi_c^+\to\Sigma^+h^+h^- and Λc+→ph+h−\Lambda_c^+\to ph^+h^-), finding results consistent with CPCP symmetry and UU-spin predictions.

Belle II Collaboration, M. Abumusabh, I. Adachi, H. Ahmed, Y. Ahn, H. Aihara, N. Akopov, S. Alghamdi, M. Alhakami, N. Al (…)2026-07-14
⚛️ high-energy experiments

Search for single production of a vector-like T quark decaying to a top quark and a neutral scalar boson in the lepton+jets final state in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of proton-proton collision data at 13 TeV collected by the CMS experiment, this study presents the first search for single production of a vector-like T quark decaying to a top quark and a neutral scalar boson (either the Standard Model Higgs or a new scalar) in the lepton+jets final state, setting the best current exclusion limits on this process for T quark masses above 2 TeV.

CMS Collaboration2026-07-14
⚛️ phenomenology

Benchmarking the Nearside Energy-Energy Correlators with Mellin Transform

This paper presents a Mellin-transform framework that successfully describes nearside energy-energy correlators in e+e−e^+e^- annihilation across perturbative and post-confinement regimes using a single transition scale parameter Λ\Lambda, achieving excellent agreement with experimental data from ALEPH and earlier measurements at next-to-next-to-leading-order accuracy and next-to-next-to-leading-logarithmic resummation.

Yuxun Guo, Feng Yuan2026-07-14
⚛️ phenomenology

The Higgs boson through the lens of electroweak precision data

This paper presents an updated global electroweak fit incorporating the latest WW-boson mass and Higgs signal-strength measurements to confirm the Standard Model's internal consistency, derive indirect constraints on Higgs couplings and width, and establish bounds on invisible decays and Wilson coefficients while projecting future precision at the FCC-ee.

Yannick Fischer, Johannes Haller, Andreas Hoecker, Roman Kogler, Finn Labe, Klaus Mönig, Dennis Schwarz, Jörg Stelzer2026-07-14
⚛️ high-energy experiments

Observation of new excited Σc0\it{\Sigma}_{c}^{0} states in the B−→Λc+p‾π−B^-\rightarrow \it{\Lambda}^+_c\overline{p}\pi^{-} decay

Using 9 fb⁻¹ of proton-proton collision data collected by the LHCb detector, an amplitude analysis of the B−→Λc+p‾π−B^-\rightarrow \Lambda^+_c\overline{p}\pi^{-} decay confirms the known Σc(2455)0\Sigma_c(2455)^0, Σc(2520)0\Sigma_c(2520)^0, and Σc(2800)0\Sigma_c(2800)^0 states while discovering two new excited charm baryons, Σc(2900)0\Sigma_c(2900)^0 and Σc(3200)0\Sigma_c(3200)^0, thereby significantly expanding the landscape of charm baryon spectroscopy.

LHCb collaboration, R. Aaij, M. Abdelfatah, A. S. W. Abdelmotteleb, C. Abellan Beteta, F. Abudinén, T. Ackernley, A. A. (…)2026-07-14
⚛️ lattice

The Neutron Electric Dipole Moment from Lattice QCD using a Background Electric Field

Using 2+1 flavor domain wall fermion lattice QCD ensembles and a novel method involving a background electric field with single time-slice topological charge sampling to mitigate statistical noise and excited-state contamination, the authors calculate the neutron electric dipole moment to be dn=−0.0050(4)stat(8)sysθˉd_n=-0.0050(4)^\text{stat}(8)^\text{sys}\bar{\theta} ee fm after extrapolation to the physical point.

Thomas Blum, Fangcheng He, Taku Izubuchi, Luchang Jin, Hiroshi Ohki, Sergey Syritsyn2026-07-14
⚛️ high-energy experiments

First double-differential measurement of pionless charged-current muon neutrino interactions using kinematic imbalance observables on carbon and oxygen with the T2K experiment

The T2K experiment reports the first double-differential measurement of pionless charged-current muon neutrino interactions on carbon and oxygen using kinematic imbalance observables, revealing that current neutrino event generators fail to fully describe the data and highlighting the need for improved nuclear interaction modeling to reduce systematic uncertainties in future oscillation experiments.

K. Abe, S. Abe, H. Adhikary, R. Akutsu, H. Alarakia-Charles, Y. I. Alj Hakim, S. Alonso Monsalve, L. Anthony, S. Aoki, K (…)2026-07-14
⚛️ high-energy experiments

Signal selection and model-independent extraction of pionless charged-current muon neutrino cross section using double-differential kinematic imbalance observables on carbon and oxygen with the T2K experiment

The T2K experiment presents the first joint measurement of muon neutrino CC0πNp0\pi Np interactions on carbon and oxygen targets using double-differential kinematic imbalance observables, revealing that current neutrino-nucleus interaction models fail to adequately describe the data and underscoring the urgent need for improved theoretical nuclear modeling to enhance neutrino oscillation precision.

K. Abe, S. Abe, H. Adhikary, R. Akutsu, H. Alarakia-Charles, Y. I. Alj Hakim, S. Alonso Monsalve, L. Anthony, S. Aoki, K (…)2026-07-14
⚛️ high-energy experiments

Search for dark matter in a signature with a four-prong large-radius jet in proton-proton collisions at s\sqrt{s} = 13 TeV

Using 138 fb−1^{-1} of 13 TeV proton-proton collision data collected by the CMS detector, this study presents the first search for nonprompt dark matter candidates in a Lorentz-boosted topology featuring a four-prong large-radius jet and missing transverse momentum, finding no significant excess over Standard Model expectations and setting 95% confidence level upper limits on signal strength.

CMS Collaboration2026-07-14