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  • Open Access

New sensitivity goal for neutrinoless double beta decay experiments

Vishnudath K. N., Sandhya Choubey, and Srubabati Goswami
Phys. Rev. D 99, 095038 – Published 28 May 2019
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  • INTRODUCTION
  • PREDICTIONS FOR 0νββ
  • SENSITIVITY IN THE FUTURE EXPERIMENTS
  • CONCLUSION
  • ACKNOWLEDGMENTS
    • References

    Abstract

    We study the implications of the Dark-LMA (DLMA) solution to the solar neutrino problem for neutrinoless double beta decay (0νββ). We show that, while the predictions for the effective mass governing 0νββ remain unchanged for the inverted mass scheme, that for normal ordering becomes higher for the DLMA parameter space and moves into the “desert region” between the two. This sets a new goal for the sensitivity reach for the next-generation experiments if no signal is found for the inverted ordering by the future search programs.

    • Figure
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    • Received 30 January 2019

    DOI:https://doi.org/10.1103/PhysRevD.99.095038

    Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

    Published by the American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    Neutrino interactionsNeutrino oscillationsNeutrinoless double beta decay
    Particles & Fields

    Authors & Affiliations

    Vishnudath K. N.1,2,*, Sandhya Choubey3,†, and Srubabati Goswami1,‡

    • 1Physical Research Laboratory, Ahmedabad 380009, India
    • 2Discipline of Physics, Indian Institute of Technology, Gandhinagar 382355, India
    • 3Harish-Chandra Research Institute, HBNI, Chhatnag Road, Jhunsi, Allahabad 211 019, India

    • *vishnudath@prl.res.in
    • †sandhya@hri.res.in
    • ‡sruba@prl.res.in

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    Issue

    Vol. 99, Iss. 9 — 1 May 2019

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    • Figure 1
      Figure 1

      The effective neutrino mass mββ for 0νββ as a function of the lightest neutrino mass for both NO and IO. The pink region is for NO with the standard solution for θ12, and the red band is for NO with θD12. For the IO case (the blue band), mββ remains the same for the DLMA solution. See the text for details.

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    • Figure 2
      Figure 2

      Xe136 discovery sensitivity as a function of sensitive exposure for a selection of sensitive background levels. The yellow, black, brown and blue lines correspond to different values of the sensitive background levels of 0, 10−5, 10−4 and 10−3  cts/(kgiso yr) respectively.

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