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Xenon-Doped Liquid Argon TPCs as a Neutrinoless Double Beta Decay Platform
High Energy Physics - Experiment · Submitted 24 Mar 2022
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We find that such a detector could reach $m_{\beta\beta}$ sensitivity at the 2-4 meV range with xenon doping at 2% if significant background reductions can be achieved.
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The abstract, sentence by sentence
Searches for neutrinoless double-beta decay continue to expand our understanding of the lepton sector, with experiments now pursuing ton-scale target masses with sensitivity to $m_{\beta\beta}$ covering the allowed parameter space for the inverted neutrino mass ordering. Continued searches for this rare decay will require scalable detector technologies to achieve significant increases in the target mass beyond the ton scale, in order to probe the normal ordering region. This work explores the concept of searching for neutrinoless double-beta decay in a 10 kton scale liquid argon time projection chamber (LArTPC) located deep underground and doped with percent-level quantities of xenon. We discuss the design requirements, background mitigation and detector R&D needs, and considerations for deployment in a modified DUNE far detector module. We find that such a detector could reach $m_{\beta\beta}$ sensitivity at the 2-4 meV range with xenon doping at 2% if significant background reductions can be achieved.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Searches for neutrinoless double-beta decay continue to expand our understanding of the lepton sector, with experiments now pursuing ton-scale target masses with sensitivity to $m_{\beta\beta}$ covering the allowed parameter space for the inverted neutrino mass ordering. | background 1.00 | 0.05 | 0.03 | asserted 1.00 |
| s1 | Continued searches for this rare decay will require scalable detector technologies to achieve significant increases in the target mass beyond the ton scale, in order to probe the normal ordering region. | background 0.62 | 0.06 | 0.04 | asserted 0.89 |
| s2 | This work explores the concept of searching for neutrinoless double-beta decay in a 10 kton scale liquid argon time projection chamber (LArTPC) located deep underground and doped with percent-level quantities of xenon. | contribution 0.93 | 0.35 | 0.07 | asserted 0.62 |
| s3 | We discuss the design requirements, background mitigation and detector R&D needs, and considerations for deployment in a modified DUNE far detector module. | contribution 0.82 | 0.45 | 0.03 | asserted 0.65 |
| s4 | We find that such a detector could reach $m_{\beta\beta}$ sensitivity at the 2-4 meV range with xenon doping at 2% if significant background reductions can be achieved. | result 1.00 | 0.92 | 0.88 | hedged possibility 0.97 |
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The paper
Original abstract
Searches for neutrinoless double-beta decay continue to expand our understanding of the lepton sector, with experiments now pursuing ton-scale target masses with sensitivity to $m_{\beta\beta}$ covering the allowed parameter space for the inverted neutrino mass ordering. Continued searches for this rare decay will require scalable detector technologies to achieve significant increases in the target mass beyond the ton scale, in order to probe the normal ordering region. This work explores the concept of searching for neutrinoless double-beta decay in a 10 kton scale liquid argon time projection chamber (LArTPC) located deep underground and doped with percent-level quantities of xenon. We discuss the design requirements, background mitigation and detector R&D needs, and considerations for deployment in a modified DUNE far detector module. We find that such a detector could reach $m_{\beta\beta}$ sensitivity at the 2-4 meV range with xenon doping at 2% if significant background reductions can be achieved.
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How the literature uses it
5 arXiv papers cite this in 5 sentences
Papers citing it · 4 sentences without a confident label
Cites it as background 1 paper
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Low-energy LArTPC signatures from a variety of possible sources have been investigated and described in literature, including those from solar neutrinos [ref] , accelerator neutrinos [ref] , hidden sector [ref] particle and WIMP [ref] interactions, neutrinoless double beta decay [ref] , and supernova neutrinos [ref] , which will be the physics focus of this study.
Enhanced low-energy supernova burst detection in large liquid argon time projection chambers enabled by Q-Pix · Low-Energy Physics Simulation · 0.92
What it cites · 34 sentences without a confident label
Uses the method or tool of 2 papers
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The Geant4-based [ref] detector simulation, performed using the RAT-PAC package [ref] , assumes a detector similar to the DUNE Dual Phase or Vertical Drift LArTPC [ref] , composed of a monolithic fully-active inner volume of liquid argon, 12 m wide by 14 m tall by 58.2 m long.
2002.03005 · Experimental Concept · 1.00
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From the total expected backgrounds we apply the Feldman-Cousins procedure [ref] to obtain a one-sided upper limit on the signal rate, $Ŝ$, which is converted to a lower limit on the half-life by accounting for the number of $^136$Xe nuclei $N_iso$, efficiency $η$, and experiment live time $t$: [equation]
A Unified Approach to the Classical Statistical Analysis of Small Signals · $0νββ$ Searches and Sensitivity · 1.00
Uses data or values from 9 papers
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To convert this half-live into an upper limit on the effective Majorana neutrino mass $m_ββ$, we use the phase space factor from Kotila and Iachello $G_0ν=3.78×10^-14 y^-1$ [ref] with $g_A=1.269$, and the IBM-2 matrix element $M_0ν=3.33$ [ref] in relating [equation] We calculate a 90% C.L. sensitivity of $m_ββ=2.46 meV$ and $T_1/2^0ν = 1.03×10^29 years$ for the baseline assumptions of 2% Xe doping, 10 year total exposure and an energy resolution of 1%.
Phase space factors for double-$\beta$ decay · $0νββ$ Searches and Sensitivity · 0.97
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To convert this half-live into an upper limit on the effective Majorana neutrino mass $m_ββ$, we use the phase space factor from Kotila and Iachello $G_0ν=3.78×10^-14 y^-1$ [ref] with $g_A=1.269$, and the IBM-2 matrix element $M_0ν=3.33$ [ref] in relating [equation] We calculate a 90% C.L. sensitivity of $m_ββ=2.46 meV$ and $T_1/2^0ν = 1.03×10^29 years$ for the baseline assumptions of 2% Xe doping, 10 year total exposure and an energy resolution of 1%.
Nuclear matrix elements for double-{\beta} decay · $0νββ$ Searches and Sensitivity · 0.97
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To model muon-induced backgrounds, we begin with the absolute yields tabulated in Ref. [ref] and half-lives, beta decay spectra, and associated gamma cascades from the IAEA Nuclear Data Services database [ref] .
Developing the MeV potential of DUNE: Detailed considerations of muon-induced spallation and other backgrounds · Cosmogenically-activated radioisotopes · 0.89
Compares with 2 papers
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For context, the current best half-life limit, from the KamLAND-Zen experiment, is $1.07×10^26$ years ($m_ββ=61-165 meV$) [ref] and next-generation multi-ton-scale experiments, such as nEXO [ref] , anticipate sensitivity to half-lives in the range of $6×10^27$ years ($m_ββ=10.18 meV$) when using a similar counting analysis.
Search for Majorana Neutrinos near the Inverted Mass Hierarchy Region with KamLAND-Zen · $0νββ$ Searches and Sensitivity · 0.96
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For context, the current best half-life limit, from the KamLAND-Zen experiment, is $1.07×10^26$ years ($m_ββ=61-165 meV$) [ref] and next-generation multi-ton-scale experiments, such as nEXO [ref] , anticipate sensitivity to half-lives in the range of $6×10^27$ years ($m_ββ=10.18 meV$) when using a similar counting analysis.
Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double beta decay · $0νββ$ Searches and Sensitivity · 0.96
Cites as background 1 paper
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The field of searches is rich in experimental approaches, both current and planned, to search for the decay in a variety of candidate isotopes [ref] .
Neutrinoless Double-Beta Decay: Status and Prospects · Introduction · 0.99
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