First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon

Akimov, D.; Albert, J. B.; An, P.; Awe, C.; Barbeau, P. S.; Becker, B.; Belov, V.; Blackston, M. A.; Blokland, L.; Bolozdynya, A.; Cabrera-Palmer, B.; Chen, N.; Chernyak, D.; Conley, E.; Cooper, R. L.; Daughhetee, J.; Coello, M. del Valle; Detwiler, J. A.; Durand, M. R.; Efremenko, Y.; Elliott, S. R.; Fabris, L.; Febbraro, M.; Fox, W.; Galindo-Uribarri, A.; Green, M. P.; Hansen, K. S.; Heath, M. R.; Hedges, S.; Hughes, M.; Johnson, T.; Kaemingk, M.; Kaufman, L. J.; Khromov, A.; Konovalov, A.; Kozlova, E.; Kumpan, A.; Li, L.; Librande, J. T.; Link, J. M.; Liu, J.; Mann, K.; Markoff, D. M.; McGoldrick, O.; Moreno, H.; Mueller, P. E.; Newby, J.; Parno, D. S.; Penttila, S.; Pershey, D.; Radford, D.; Rapp, R.; Ray, H.; Raybern, J.; Razuvaeva, O.; Reyna, D.; Rich, G. C.; Rudik, D.; Runge, J.; Salvat, D. J.; Scholberg, K.; Shakirov, A.; Simakov, G.; Sinev, G.; Snow, W. M.; Sosnovtsev, V.; Suh, B.; Tayloe, R.; Tellez-Giron-Flores, K.; Thornton, R. T.; Tolstukhin, I.; Vanderwerp, J.; Varner, R. L.; Virtue, C. J.; Visser, G.; Wiseman, C.; Wongjirad, T.; Yang, J.; Yen, Y. -R.; Yoo, J.; Yu, C. -H.; Zettlemoyer, J.

doi:10.48550/arxiv.2003.10630

Cited by 29 publications

(84 citation statements)

References 50 publications

(75 reference statements)

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“…The CENNS10 detector reported [4] the observation of 159 ± 43(stat) ± 14(syst) CEνNS events at a significance of 3.5σ as opposed to a SM prediction of 128 ± 17 events. The energy, timing and F90 distributions from the COHERENT Collaboration are shown in Fig.…”

Section: Cenns10mentioning

confidence: 93%

“…The first, steady state backgrounds, are present in both beam-on and beamoff data and may be handled using prescribed methods of background subtraction as described in Refs. [4,13]. The second, beam-related-neutrons (BRN) and neutrinoinduced-neutrons (NIN) occur in time with the SNS beam and are hence more difficult to separate.…”

Section: A Backgroundsmentioning

confidence: 99%

“…More on the PSD variable (F90) and the cuts used on it can be found in Ref. [4]. We use F90 cuts identical to Analysis A described in this reference.…”

Section: Cenns10mentioning

confidence: 99%

“…The Collaboration also reported that the two dimensional (energy and time) profile, fit to the maximum likelihood, prefers the presence of CEνNS against its absence at the 6.7σ confidence level [3]. This was followed up by the observation of CEνNS on a liquid Ar detector which also rejects the absence of CEνNS at 3.5σ (3.9σ with statistical uncertainties only) with 3D-binned data in their recoil energy, timing, as well as pulse-shape-discriminator (PSD) data [4]. The COHERENT Collaboration has also recently announced the impending publication of an update to the initial dataset from their CsI detector [5] that rejects the absence of CEνNS at 11.6σ.…”

Section: Introductionmentioning

confidence: 98%

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Probing $L_μ-L_τ$ models with CE$ν$NS: A new look at the combined COHERENT CsI and Ar data

Banerjee,

Dutta,

Roy

2021

Preprint

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Minimal gauged U (1)L µ−Lτ model has long been known to be able to explain the tension between the theoretical and experimental values of the muon magnetic moment. It has been explored and tested extensively, pushing the viable parameter space into a very tight corner. Further, embedding the U (1)L µ−Lτ model in a supersymmetric (SUSY) framework has been shown to relax some of these constraints and has recently been shown to explain the electron anomalous magnetic moment as well. In this model, the logarithm of the mass ratio of third to second generation (s)leptons control the non-negligible kinetic mixing and may crucially alter many of the constraints. We confront both the non-SUSY and SUSY versions of this class of models with the CsI(2017), the recently released CENNS10 data from the liquid Argon detector as well as the updated CsI(2020) data of the COHERENT experiment. We use the recoil energy and timing binned data from CsI(2017) and the energy, time and PSD binned data from CENNS10 to find estimates for the model parameters in a likelihood maximization test. We also show updated exclusions using all of the above data from the COHERENT Collaboration, as well as projected exclusions from the ongoing Coherent CAPTAIN-Mills (CCM) experiment. The (g − 2)µ favored values of the U (1)L µ−Lτ gauge coupling that are still unconstrained overlaps with the estimates from COHERENT data within 1σ. The combined COHERENT data is found to prefer the presence of the U (1)L µ−Lτ gauge boson over the SM at ∼ 1.4σ. The global minima of a chi-square deviation function using CsI(2020) as well as CENNS10 total counts has significant overlap with the (g − 2)µ,e favored parameter space in the context of SUSY Lµ − Lτ model.

show abstract

Section: Cenns10mentioning

confidence: 93%

Section: A Backgroundsmentioning

confidence: 99%

“…More on the PSD variable (F90) and the cuts used on it can be found in Ref. [4]. We use F90 cuts identical to Analysis A described in this reference.…”

Section: Cenns10mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Probing $L_μ-L_τ$ models with CE$ν$NS: A new look at the combined COHERENT CsI and Ar data

Banerjee,

Dutta,

Roy

2021

Preprint

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show abstract

“…The observation of CEνNS opens a new window to probe new physics beyond the SM at low energies [3]. Recently, CEνNS has also been measured in an argon detector by the COHERENT collaboration at more than 3σ significance [4]. In addition, the CONNIE [5] and CONUS [6] experiments have measured CEνNS with reactor antineutrinos in a silicon and germanium detector, respectively.…”

mentioning

confidence: 99%

Coherent neutrino scattering and the Migdal effect on the quenching factor

Liao,

Liu,

Marfatia

2021

Preprint

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Recent measurements of the germanium quenching factor deviate significantly from the predictions of the standard Lindhard model for nuclear recoil energies below a keV. This departure may be explained by the Migdal effect in neutron scattering on germanium. We show that the Migdal effect on the quenching factor can mimic the signal of a light Z or light scalar mediator in coherent elastic neutrino-nucleus scattering experiments with reactor antineutrinos. It is imperative that the quenching factor of nuclei with low recoil energy thresholds be precisely measured close to threshold to avoid such confusion. This will also help in experimental searches of light dark matter.

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Characterization of VUV4 SiPM for liquid argon detector

L.Wang¹,

Guan

Qin

et al. 2021

J. Inst.

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Silicon photomultiplier (SiPM), a new type of photosensor, is considered a substitute for traditional photomultiplier tube (PMT) in the next generation of dark matter and neutrino detectors, especially in noble gas detectors like liquid argon. However, the design of compact SiPM arrays and their cryogenic electronics that can work in liquid argon is barely developed. Thus, two candidate SiPM arrays from Hamamatsu and Onsemi were selected to verify the feasibility and effectiveness of the design. In this work, we successfully developed a cryogenic electronics read-out system that connects and works with 1-inch 4×4 SiPM arrays at 87 K. The power dissipation of amplifiers is less than 10 µW/mm 2 . Furthermore, multiply significant characteristics of both types of SiPM arrays were measured at liquid argon temperature, such as dark count rate (DCR), breakdown voltage (V bd ), single photoelectron (SPE) performance, signal to noise ratio (SNR) and correlated signal probability.

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First Measurement of Coherent Elastic Neutrino-Nucleus Scattering on Argon

Cited by 29 publications

References 50 publications

Probing $L_μ-L_τ$ models with CE$ν$NS: A new look at the combined COHERENT CsI and Ar data

Probing $L_μ-L_τ$ models with CE$ν$NS: A new look at the combined COHERENT CsI and Ar data

Coherent neutrino scattering and the Migdal effect on the quenching factor

Characterization of VUV4 SiPM for liquid argon detector

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