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arxiv 2002.09346 v4 pith:5TFOYTWG submitted 2020-02-21 physics.ins-det hep-ex

A measurement of the group velocity of scintillation light in liquid argon

classification physics.ins-det hep-ex
keywords argonliquidlightscintillationlambdamathcalmeasuredpropagation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The propagation velocity of scintillation light in liquid argon $v_{g}$ at $\lambda \sim 128$~nm wavelength, has been measured for the first time in a dedicated experimental setup at CERN.\\ The obtained result $\frac{1}{v_{g}} = 7.46 \pm 0.08$~ns/m , is then used to derive the value of the refractive index (n) and the Rayleigh scattering length ($\mathcal{L}$) for liquid argon in the VUV region. For $\lambda = 128$~nm we found $n= 1.358 \pm 0.003$ and $\mathcal{L}= 99.1 \pm 2.3$~cm. The measured values are of interest for a variety of experiments searching for rare events like neutrino and dark matter interactions. The derived quantities also represent key information for theoretical models describing the propagation of scintillation light in liquid argon.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. First Demonstration of a Hybrid Cherenkov and Scintillation Detector in a Proof-of-Principle Axion Search at a Beam Dump

    hep-ex 2026-07 conditional novelty 7.0

    First event-by-event Cherenkov separation from sub-MeV electrons in liquid argon enables a proof-of-principle ALP search excluding new parameter space despite no observed excess.

  2. GPU optical photon Monte Carlo for noble liquid detectors: validation against Geant4 in a large liquid argon TPC benchmark

    physics.ins-det 2026-06 accept novelty 6.0

    Simphony reproduces Geant4 detected-photon ratios, arrival times, and wavelengths at sub-percent level in a large LAr TPC benchmark while delivering 1053x optical transport speedup on RTX 4090.

  3. Medium Characterization with Hard Probes: From Cherenkov Light in QED to Jet Drift in QCD

    nucl-th 2026-05 unverdicted novelty 5.0

    The work presents a dispersive fit for the refractive index of liquid argon incorporating anomalous dispersion and proposes jet drift in simulations of heavy-ion collisions as a way to disentangle medium properties fr...

  4. Medium Characterization with Hard Probes: From Cherenkov Light in QED to Jet Drift in QCD

    nucl-th 2026-05 unverdicted novelty 4.0

    Presents a dispersive fit for liquid argon refractive index sensitive to Cherenkov angles and uses jet drift in APE simulations to disentangle QGP tomography from energy loss.