CUPID pre-CDR
Pith reviewed 2026-05-24 17:39 UTC · model grok-4.3
The pith
CUPID will reduce backgrounds with alpha/beta discrimination and 100Mo to probe neutrinoless double beta decay in the inverted neutrino hierarchy.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
CUPID will dramatically reduce the backgrounds in the region of interest by introducing high efficiency α/β discrimination techniques, also demonstrated by the CUPID-0 and CUPID-Mo experiments, and using a high transition energy double beta decay nucleus, 100Mo, while building on CUORE to reach the sensitivity needed to explore the inverted hierarchy region.
What carries the argument
High-efficiency α/β discrimination in a large array of 100Mo-based scintillating bolometers.
If this is right
- CUPID will have sensitivity to the inverted hierarchy region of neutrino masses.
- Backgrounds will be low enough to allow a potential discovery of 0νββ decay.
- The technology will be demonstrated at tonne scale by reusing CUORE infrastructure.
- Projected sensitivities follow directly from performance shown in CUPID-0 and CUPID-Mo.
Where Pith is reading between the lines
- Successful scaling could inform designs for searches targeting the normal hierarchy with the same approach.
- The detector might also enable high-precision studies of two-neutrino double beta decay or other rare processes.
- Infrastructure reuse lowers barriers compared to building entirely new facilities.
Load-bearing premise
The α/β discrimination performance and background levels achieved in smaller experiments can be maintained or improved when scaled to a full tonne-scale array without introducing new dominant backgrounds.
What would settle it
A measurement of the background rate in the region of interest for a large prototype array that exceeds the target level needed for the projected sensitivity by more than a factor of a few.
Figures
read the original abstract
CUPID is a proposed future tonne-scale bolometric neutrinoless double beta decay ($0\nu\beta\beta$) experiment to probe the Majorana nature of neutrinos and discover Lepton Number Violation in the so-called inverted hierarchy region of the neutrino mass. CUPID will be built on experience, expertise and lessons learned in CUORE, and will exploit the current CUORE infrastructure as much as possible. In order to achieve its ambitious science goals, CUPID aims to dramatically reduce the backgrounds in the region of interest introducing a high efficiently $\alpha$/$\beta$ discrimination techniques, also demonstrated by the CUPID-0 and CUPID-Mo experiments, and using a high transition energy double beta decay nucleus, $^{100}$Mo. This document describe the main concepts related with the design of the CUPID experiment and indicates the projected sensitivities and the global scientific goal of the experiment.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The manuscript is the pre-CDR for CUPID, a proposed ~1-tonne bolometric 0νββ experiment using 100Mo that reuses CUORE infrastructure. It claims that α/β discrimination techniques already demonstrated in the CUPID-0 and CUPID-Mo demonstrators, combined with the high Q-value of 100Mo, will reduce backgrounds in the ROI sufficiently to reach the inverted-hierarchy region of neutrino mass.
Significance. If the background index and discrimination efficiency can be maintained at tonne scale, CUPID would deliver one of the most sensitive 0νββ searches and could discover lepton-number violation; the document correctly credits the prior demonstrators for the key enabling technology.
major comments (2)
- [projected sensitivities section] The sensitivity projections (abstract and the section on projected sensitivities) adopt the background rate after discrimination and the α/β efficiency directly from CUPID-0/CUPID-Mo without any Monte-Carlo study or scaling analysis of new surface, wiring, or cryogenic backgrounds that scale with detector mass and channel count; this extrapolation is load-bearing for the central claim.
- [design concepts and background model] No quantitative validation is supplied that the high-efficiency α/β discrimination demonstrated on the smaller arrays remains parameter-free or efficiency-preserving when the array size increases by more than an order of magnitude; the free parameters listed in the design (background rate and discrimination efficiency) therefore remain untested at the target scale.
minor comments (2)
- [Abstract] Abstract: 'high efficiently α/β discrimination' should read 'high-efficiency α/β discrimination'.
- [Abstract] Abstract: 'This document describe' should read 'This document describes'.
Simulated Author's Rebuttal
We thank the referee for their thorough review of the CUPID pre-CDR manuscript. We appreciate the recognition of the significance of the project and the enabling technology from the demonstrators. Below we address the major comments point by point.
read point-by-point responses
-
Referee: [projected sensitivities section] The sensitivity projections (abstract and the section on projected sensitivities) adopt the background rate after discrimination and the α/β efficiency directly from CUPID-0/CUPID-Mo without any Monte-Carlo study or scaling analysis of new surface, wiring, or cryogenic backgrounds that scale with detector mass and channel count; this extrapolation is load-bearing for the central claim.
Authors: We agree that the sensitivity projections are based on the performance achieved in the CUPID-0 and CUPID-Mo demonstrators. A comprehensive Monte Carlo analysis of all potential scaling backgrounds is indeed an important step for the full CDR. For this pre-CDR, the projections are intended to illustrate the potential reach assuming the demonstrated performance can be maintained through careful design choices informed by CUORE experience. In the revised version, we will add a dedicated subsection discussing the assumptions underlying the background model and the planned R&D to validate scaling. revision: partial
-
Referee: [design concepts and background model] No quantitative validation is supplied that the high-efficiency α/β discrimination demonstrated on the smaller arrays remains parameter-free or efficiency-preserving when the array size increases by more than an order of magnitude; the free parameters listed in the design (background rate and discrimination efficiency) therefore remain untested at the target scale.
Authors: The discrimination technique relies on the light yield and pulse shape differences, which are intrinsic to the detector material and geometry, and have been shown to work consistently across the demonstrators. While we do not provide a quantitative scaling study in this document, the design maintains similar detector dimensions and operating conditions. We will revise the text to explicitly state that the quoted efficiencies are targets based on current results and that further validation at larger scale is part of the ongoing R&D program. revision: partial
Circularity Check
No circularity: projections rely on external experimental results
full rationale
The document is a pre-CDR presenting design concepts and sensitivity projections that reference demonstrated α/β discrimination performance from the separate CUPID-0 and CUPID-Mo experiments. No equations, fits, or derivations within the paper reduce a claimed prediction or result to its own inputs by construction. Prior results are treated as independent inputs rather than self-generated. Scaling assumptions represent a correctness risk but do not constitute circularity under the defined patterns.
Axiom & Free-Parameter Ledger
free parameters (2)
- background rate in ROI after discrimination
- α/β discrimination efficiency
axioms (2)
- domain assumption α/β discrimination demonstrated at small scale can be scaled without performance degradation
- domain assumption 100Mo provides sufficient Q-value and isotopic abundance for the target sensitivity
Forward citations
Cited by 3 Pith papers
-
The detection of marine microseismic activity with the CUORE tonne-scale cryogenic experiment
CUORE detected marine microseismic vibrations and their seasonal effects on detector thresholds, resolution, and sensitivity, while showing a noise decorrelation method using auxiliary sensors.
-
Lepton masses and mixing in non-holomorphic modular $A_4$ with universal couplings
A modular A4 flavor model with universal couplings reproduces charged lepton masses via the modulus tau and predicts correlated neutrino observables for normal mass ordering and right-handed weight k_N = -1.
-
The nEXO Radioassay Program
A tabulation of restrictive radioactivity constraints on materials for the nEXO neutrinoless double-beta decay search and similar rare-event experiments.
Reference graph
Works this paper leans on
-
[1]
M. Tanabashi et al. (Particle Data Group), Phys. Rev. D98, 030001 (2018)
work page 2018
-
[2]
S. R. Elliott and P. Vogel, Ann. Rev. Nucl. Part. Sci.52, 115 (2002), arXiv:hep-ph/0202264 [hep-ph]
work page internal anchor Pith review Pith/arXiv arXiv 2002
-
[3]
F. T. Avignone, S. R. Elliott, and J. Engel, Rev. Mod. Phys. 80, 481 (2008)
work page 2008
-
[4]
Challenges in Double Beta Decay
O. Cremonesi and M. Pavan, Adv. High Energy Phys. 2014, 951432 (2014), arXiv:1310.4692 [physics.ins-det]
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[5]
A. Giuliani and A. Poves, Adv. High Energy Phys. 2012, ID 857016 (2012)
work page 2012
-
[6]
Search for Neutrinoless Double-Beta Decay of $^{130}$Te with CUORE-0
K. Alfonso et al. (CUORE), Phys. Rev. Lett. 115, 102502 (2015), arXiv:1504.02454 [nucl-ex]
work page internal anchor Pith review Pith/arXiv arXiv 2015
-
[7]
C. Alduino et al. (CUORE), Phys. Rev. Lett. 120, 132501 (2018), arXiv:1710.07988 [nucl-ex]
work page internal anchor Pith review Pith/arXiv arXiv 2018
-
[8]
J. W. Beeman et al., JINST 8, P05021 (2013), arXiv:1303.4080 [physics.ins-det]
work page internal anchor Pith review Pith/arXiv arXiv 2013
-
[9]
L. Cardani et al., J. Phys. G41, 075204 (2014), arXiv:1312.4680 [nucl-ex]
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[10]
J. W. Beeman et al., Phys. Lett. B 710, 318 (2012)
work page 2012
- [11]
- [12]
-
[13]
E. Armengaud et al., The European Physical Journal C 77, 785 (2017), arXiv:arXiv:1704.01758v1
work page internal anchor Pith review Pith/arXiv arXiv 2017
-
[14]
A. S. Barabash et al., The European Physical Journal C 76, 487 (2016)
work page 2016
- [15]
-
[16]
Final result of CUPID-0 phase-I in the search for the $^{82}$Se Neutrinoless Double Beta Decay
O. Azzolini et al. (CUPID), Phys. Rev. Lett. 123, 032501 (2019), arXiv:1906.05001 [nucl-ex]
work page internal anchor Pith review Pith/arXiv arXiv 2019
-
[17]
100Moββ decay search in the CUPID-Mo experiment with enriched scin- tillating bolometers,
D. V. Poda (CUPID-Mo), “ 100Moββ decay search in the CUPID-Mo experiment with enriched scin- tillating bolometers,” Poster presented at XXVIII Int. Conf. Neutrino 2018, Heidelberg, Germany, 04–09 June, 2018
work page 2018
-
[18]
A. D’Addabbo et al. (CUORE), 17th International Workshop on Low Temperature Detectors (LTD
-
[19]
Kurume City, Japan, July 17-21, 2017 , J. Low. Temp. Phys.193, 867 (2018), arXiv:1805.06209 [physics.ins-det]
work page internal anchor Pith review Pith/arXiv arXiv 2017
-
[20]
The CUORE cryostat: an infrastructure for rare event searches at millikelvin temperatures
C. Alduino et al., (2019), arXiv:1904.05745 [physics.ins-det]
work page internal anchor Pith review Pith/arXiv arXiv 2019
-
[21]
Improved limit on neutrinoless double beta decay of $^{76}$Ge from GERDA Phase II
M. Agostini et al. (GERDA), Phys. Rev. Lett. 120, 132503 (2018), arXiv:1803.11100 [nucl-ex]
work page internal anchor Pith review Pith/arXiv arXiv 2018
-
[22]
C. E. Aalseth et al. (Majorana), Phys. Rev. Lett. 120, 132502 (2018), arXiv:1710.11608 [nucl-ex]
work page internal anchor Pith review Pith/arXiv arXiv 2018
- [23]
-
[24]
Sensitivity of NEXT-100 to neutrinoless double beta decay
J. Mart´ ın-Alboet al. (NEXT), JHEP 05, 159 (2016), arXiv:1511.09246 [physics.ins-det]
work page internal anchor Pith review Pith/arXiv arXiv 2016
-
[25]
A. Gando et al. (KamLAND-Zen Collaboration), Phys. Rev. Lett. 117, 082503 (2016)
work page 2016
-
[26]
Current Status and Future Prospects of the SNO+ Experiment
S. Andringa et al. (SNO+), Adv. High Energy Phys. 2016, 6194250 (2016), arXiv:1508.05759 [physics.ins-det]
work page internal anchor Pith review Pith/arXiv arXiv 2016
- [27]
-
[28]
D. V. Poda et al. , AIP Conference Proceedings 1894, 020017 (2017), https://aip.scitation.org/doi/pdf/10.1063/1.5007642
-
[29]
Alenkov et al., (2019), arXiv:1903.09483 [hep-ex]
V. Alenkov et al., (2019), arXiv:1903.09483 [hep-ex] . 72
-
[30]
Pirro et al., Physics of Atomic Nuclei 69, 2109 (2006)
S. Pirro et al., Physics of Atomic Nuclei 69, 2109 (2006)
work page 2006
-
[31]
O. Azzolini et al. (CUPID), Eur. Phys. J. C78, 428 (2018), arXiv:1802.06562 [physics.ins-det]
work page internal anchor Pith review Pith/arXiv arXiv 2018
-
[32]
Arnaboldi et al., Astroparticle Physics 34, 797 (2011)
C. Arnaboldi et al., Astroparticle Physics 34, 797 (2011)
work page 2011
-
[33]
The Mid and Long Term Future of Neutrinoless Double Beta Decay,
A. Giuliani, “The Mid and Long Term Future of Neutrinoless Double Beta Decay,” (2018)
work page 2018
-
[34]
Chen et al., Sci.China Phys.Mech.Astron
X. Chen et al., Sci.China Phys.Mech.Astron. 60, 061011 (2017)
work page 2017
-
[35]
E. Fiorini and T. O. Niinikoski, Nuclear Instruments and Methods in Physics Research 224, 83 (1984)
work page 1984
-
[36]
Giuliani, Journal of Low Temperature Physics 167 (2012), 10.1007/s10909-012-0576-9
A. Giuliani, Journal of Low Temperature Physics 167 (2012), 10.1007/s10909-012-0576-9
- [37]
- [38]
-
[39]
D. R. Artusa et al. (CUORE), Eur. Phys. J. C74, 3096 (2014), arXiv:1404.4469 [nucl-ex]
work page internal anchor Pith review Pith/arXiv arXiv 2014
- [40]
-
[41]
A. Giuliani, F. A. Danevich, and V. I. Tretyak, The European Physical Journal C 78, 272 (2018)
work page 2018
- [42]
- [43]
-
[44]
A. D. et al, Cryogenics 93 (2018), 10.1016/j.cryogenics.2018.05.001, arXiv:1712.02753 [nucl-ex]
work page internal anchor Pith review Pith/arXiv arXiv doi:10.1016/j.cryogenics.2018.05.001 2018
-
[45]
A. Alessandrello et al., Nucl. Instrum. Meth. B142, 163 (1998)
work page 1998
-
[46]
An assembly line for the construction of ultra-pure detectors
E. Buccheri et al., Nucl. Instrum. Meth. A768, 130 (2014), arXiv:1405.0852 [physics.ins-det]
work page internal anchor Pith review Pith/arXiv arXiv 2014
-
[47]
Benato et al., Journal of Instrumentation 13, P01010 (2018)
G. Benato et al., Journal of Instrumentation 13, P01010 (2018)
work page 2018
-
[48]
Arnaboldi et al., JINST 13, P02026 (2018)
C. Arnaboldi et al., JINST 13, P02026 (2018)
work page 2018
-
[49]
Di Domizio et al., JINST 13, P12003 (2018)
S. Di Domizio et al., JINST 13, P12003 (2018)
work page 2018
- [50]
- [51]
- [52]
- [53]
-
[54]
Resource management on a VM based computer cluster for scientific computing
S. Stalio, G. D. Carlo, S. Parlati, and P. Spinnato, CoRR abs/1212.4658 (2012), arXiv:1212.4658
work page internal anchor Pith review Pith/arXiv arXiv 2012
-
[55]
L. Berg´ eet al., Physical Review C 97, 1 (2018), arXiv:1710.03459
work page internal anchor Pith review Pith/arXiv arXiv 2018
-
[56]
Time variations in the deep underground muon flux
S. Cecchini et al., EPL 87, 39001 (2009), arXiv:0907.5235 [hep-ex]
work page internal anchor Pith review Pith/arXiv arXiv 2009
-
[57]
Muon and Cosmogenic Neutron Detection in Borexino
G. Bellini et al. (Borexino), JINST 6, P05005 (2011), arXiv:1101.3101 [physics.ins-det]
work page internal anchor Pith review Pith/arXiv arXiv 2011
-
[58]
Muon-Induced Background Study for Underground Laboratories
D. Mei and A. Hime, Phys. Rev. D73, 053004 (2006), arXiv:astro-ph/0512125 [astro-ph]
work page internal anchor Pith review Pith/arXiv arXiv 2006
-
[59]
Muon-induced backgrounds in the CUORICINO experiment
E. Andreotti et al. (CUORICINO), Astropart. Phys. 34, 18 (2010), arXiv:0912.3779 [nucl-ex]
work page internal anchor Pith review Pith/arXiv arXiv 2010
- [60]
-
[61]
C. Arnaboldi, G. Pessina, and S. Pirro, Nucl. Instrum. Meth. A559, 826 (2006)
work page 2006
- [62]
-
[63]
ECP, http://www.ecp.ru/eng/
-
[64]
D. M. Chernyak et al., Nucl. Instrum. Meth. A 729, 856 (2013). 73
work page 2013
- [65]
-
[66]
D. M. Chernyak et al., Opt. Mat. 49, 67 (2015)
work page 2015
-
[67]
L. L. Nagornaya et al., IEEE Trans. Nucl. Sci. 56, 2513 (2009)
work page 2009
- [68]
- [69]
- [70]
-
[71]
A. M. Dubovik et al., Acta Phys. Pol. A 117, 15 (2010)
work page 2010
-
[72]
O. P. Barinova et al., Nucl. Instr. Meth. A 613, 54 (2010)
work page 2010
-
[73]
O. P. Barinova and others., Nucl. Instrum. Meth. A607, 573 (2009)
work page 2009
-
[74]
V. D. Grigorieva et al., J. Mat. Sci. Eng. B 7, 63 (2017)
work page 2017
-
[75]
A. A. Pavlyuk et al., Proceedings of The APSAM-92, Asia Pacific Society for Advanced Materials (Shanghai, P.R.C., 26–29 April 1992), Institute of Materials Research, Tohoku University, Sendai, Japan, , 164 (1993)
work page 1992
-
[76]
Y. A. Borovlev et al., J. Cryst. Growth 229, 305 (2001)
work page 2001
-
[77]
Velazquez et al., Solid State Sci
M. Velazquez et al., Solid State Sci. 65, 41 (2017)
work page 2017
- [78]
- [79]
-
[80]
Chen et al., Materials Letters 215, 225 (2018)
P. Chen et al., Materials Letters 215, 225 (2018)
work page 2018
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.