Search arXiv⌕ Search
Home/Archive/arXiv

arXiv · 2610.34442

MATHUSLA: A Proposed Long-Lived Particle Detector for High-Luminosity LHC

Miriam Diamond·David Richard Curtin·Erez Etzion·Caleb Miller·Runze Ren·Steven Robertson·Heather Russell
View original source ↗Read source document ↗Export metadata ↓

Abstract

Beyond the Standard Model long-lived particles (LLPs) appear in many theories that address fundamental open questions, such as the hierarchy problem and the nature of dark matter. The Large Hadron Collider (LHC) may be producing copious numbers of neutral LLPs with masses above a GeV, only for these sneaky particles to escape the main detectors without being spotted. To fill this gap, we have proposed MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles), which would be constructed on the surface above CMS and would take data during High-Luminosity LHC operations. The detector would be composed of several layers of solid plastic scintillator threaded with wavelength-shifting fibers that connect to silicon photomultipliers (SiPMs), and would monitor an empty, air-filled decay volume. The Conceptual Design Report (CDR) published in 2025 sets out a benchmark geometry of 40m x 40m x 16m, with a modular detector construction scheme that would allow data collection to begin as soon as the first module is installed. This proceeding documents the results of more detailed studies conducted since the CDR on the detector's potential location, mechanical engineering of modules, data acquisition system, cosmic ray backgrounds, event selection criteria, and trigger algorithms.

Explore related subjects

hep-ex

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Miriam Diamond, David Richard Curtin, Erez Etzion, Caleb Miller, Runze Ren, Steven Robertson, Heather Russell. 2026-10-25. MATHUSLA: A Proposed Long-Lived Particle Detector for High-Luminosity LHC. https://arxiv.org/abs/2610.34442

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related papers

arXiv2026

First measurement of $ψ(3686)\to\bar{p} K^{+} Σ^{*}(1385)^{0} + c.c.$ and $ψ(3686)\to\bar{p} K^{*}(892)^{0} Σ^{+} + c.c.$

Based on a sample of $(2712.4 \pm 14.3) \times 10^6$ $ψ(3686)$ events collected with the BESIII detector at the BEPCII collider, we report the first observation of the decays $ψ(3686)\to\bar{p} K^{+} Σ^{*}(1385)^{0}+c.c.$ and $ψ(3686)\to\bar{p} K^{*}(892)^{0} Σ^{+} + c.c.$. The corresponding branching fractions are determined to be $\mathcal{B}(ψ(3686)\to\bar{p}K^+Σ^{*}(1385)^{0}+c.c.)=(3.94\pm0.15_{\text{stat.}}\pm0.24_{\text{syst.}})\times10^{-5}$ and $\mathcal{B}(ψ(3686)\to\bar{p}K^{*}(892)^{0}Σ^++c.c.)=(4.93\pm0.14_{\text{stat.}}\pm0.30_{\text{syst.}})\times10^{-5}$. Furthermore, we search for the hidden-strange pentaquark candidates $N_{x}(1875)$ and $N_{x}(2100)$ in the invariant mass spectra of $K^{+} Σ^{*}(1385)^{0}$ and $K^{*}(892)^{0} Σ^{+}$, respectively. No significant signals are observed and the upper limits on the branching fractions at the 90% confidence level are $\mathcal{B}(ψ(3686)\to\bar{p}N_{x}(1875)\to\bar{p}K^+Σ^{*}(1385)^{0})<1.58\times10^{-6}$ and $\mathcal{B}(ψ(3686)\to\bar{p}N_{x}(2100)\to\bar{p}K^{*}(892)^{0}Σ^+)<3.09\times10^{-7}$.

hep-ex↗
arXiv2026

LH$μ$C: A high energy, high luminosity muon-hadron collider at CERN

The latest developments regarding the feasibility of muon-hadron collisions, achieved through the major reuse of LH$e$C infrastructure, are presented - at the LH$μ$C, a 1 or 2 TeV $μ^+$ beam collides with a 7 TeV proton beam, resulting in the $μ^+p$ centre-of-mass energy of 5.3 or 7.5 TeV, respectively, at an average luminosity close to $10^{34}$cm$^{-2}$s$^{-1}$. First, a concise scientific motivation is given, including exceptional prospects for neutrino science, and is followed by a presentation of the LH$μ$C concept in a nutshell - from the source of ultra-cold anti-muons, through the muon booster, to the main muon ring. Basic considerations regarding the machine-detector interface and the general-purpose detector are also presented. The paper concludes with an outlook underlying unique and powerful synergies between the LH$μ$C, LH$e$C, FCC and Muon Collider projects.

hep-ex↗
arXiv2026

Observation of the $T_{c\bar{c}1}(4430)^-$ state in $B^0\to D^{*-}D^0K^+$ decays

A study of resonant structures in $B^0 \to D^{*-}D^0K^+$ decays is presented. The analysis uses proton-proton collision data collected by the LHCb experiment at center-of-mass energies of $\sqrt{s} = 7$, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb$^{-1}$. The analysis demonstrates that the existing known excited $D_s^+$ resonances in the $D^0K^+$ spectrum are insufficient to describe the data. The inclusion of the tetraquark state $T_{c\bar{c}1}(4430)^-$ improves the description of the data with a statistical significance exceeding $5σ$. This corresponds to the first observation of the $T_{c\bar{c}1}(4430)^- \to D^{*-} D^0$ decay. The measured properties of the $T_{c\bar{c}1}(4430)^-$ state are consistent with those previously measured in its decay to the $ψ(2S)π^-$ final state.

hep-ex↗