White Paper on Light Sterile Neutrino Searches and Related Phenomenology

Acero, M. A.; Argüelles, C.; Hostert, M.; Kalra, D.; Karagiorgi, G.; Kelly, K. J.; Littlejohn, B.; Machado, P.; Pettus, W.; Toups, M.; Ross-Lonergan, M.; Sousa, A.; Surukuchi, P. T.; Wong, Y. Y. Y.; W., Abdallah,; Abdullahi, A. M.; R., Akutsu,; Alvarez-Ruso, L.; Alves, Daniele S. M.; Aurisano, A.; Balantekin, A. B.; Berryman, J. M.; Bertólez-Martínez, T.; J., Brunner,; Blennow, M.; Bolognesi, S.; Borusinski, M.; Cianci, D.; Collin, G.; Conrad, J. M.; B., Crow,; Denton, P. B.; Duvall, M.; Fernández‐Martínez, E.; Fong, C. S.; Foppiani, N.; Forero, D. V.; Friend, M.; García-Soto, A.; Giganti, C.; Giunti, C.; Gandhi, R.; Ghosh, M.; J., Hardin,; Heeger, K. M.; M., Ishitsuka,; Izmaylov, A.; Jones, B. J. P.; Jordan, J. R.; Kamp, N. W.; Katori, T.; Kim, S. B.; Koerner, L. W.; M., Lamoureux,; Lasserre, T.; Leach, K. G.; Learned, J.; Li, Y. F.; Link, J. M.; Louis, W. C.; Mahn, K.; Meyers, P. D.; Maricic, J.; Marko, D.; Maruyama, T.; Mertens, S.; Minakata, H.; Mocioiu, I.; Mooney, M.; Moulai, M. H.; Nunokawa, H.; Ochoa-Ricoux, J. P.; Oh, Y. M.; Ohlsson, T.; Päs, H.; Pershey, D.; Robertson, R. G. H.; Rosauro-Alcaraz, S.; Rott, C.; Roy, S.; Salvado, J.; M., Scott,; Seo, S. H.; Shaevitz, M. H.; Smiley, M.; Spitz, J.; Stachurska, J.; Thakore, T.; Ternes, C. A.; Thompson, A.; Tseng, S.; Vogelaar, B.; Weiss, T.; Wendell, R. A.; Wright, T.; Xin, Z.; Yang, B. S.; Yoo, J.; Zennamo, J.; Zettlemoyer, J.; Zornoza, J. D.; Ahmad, S.; Basto-Gonzalez, V. S.; Bowden, N. S.; Cañas, B. C.; Caratelli, D.; Chang, C. V.; Chen, C.; Classen, T.; Convery, M.; Davies, G. S.; Dennis, S. R.; Z., Djurcic,; Dorrill, R.; Du, Y.; Evans, J. J.; Fahrendholz, U.; Formaggio, J. A.; Foust, B. T.; Gatti, H. Frandini; Garcia-Gamez, D.; Gariazzo, S.; Gehrlein, J.; Grant, C.; Gomes, R. A.; Hansell, A. B.; Halzen, F.; S., Ho,; Zink, J. Hoefken; Jones, R. S.; Kunkle, P.; Li, J. -Y.; Li, S. C.; Luo, X.; Malyshkin, Y. M.; Massaro, D.; Mastbaum, A.; Mohanta, R.; Mumm, H. P.; Nebot-Guinot, M.; Neilson, R.; Ni, K.; Nieves, J.; Gann, G. D. Orebi; Pandey, V.; Pascoli, S.; X., Qian,; Rajaoalisoa, M.; Roca, C.; Roskovec, B.; Saul-Sala, E.; Saldaña, L.; Scholberg, K.; Shakya, B.; Slocum, P. L.; Snider, E. L.; J., Steiger, H. Th.; Steklain, A. F.; Stock, M. R.; Sutanto, F.; Takhistov, V.; Tsai, Y. -D.; Tsai, Y. -T.; Venegas-Vargas, D.; Wallbank, M.; Wang, E.; Weatherly, P.; Westerdale, S.; Worcester, E.; W., Wu,; Yang, G.; Zamorano, B.

doi:10.48550/arxiv.2203.07323

Cited by 16 publications

(21 citation statements)

References 574 publications

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“…Sterile neutrinos can be realized across many mass scales; the vacuum mixing of sterile neutrinos with active states is constrained by experiment, astrophysical, and cosmological considerations [25]. Short baseline oscillation experiment (e.g., MiniBooNE [26]) and reactor neutrino [27,28] anomalies have been interpreted as active-sterile oscillation with large mixing at the ∼1 eV mass scale [29]. Likewise, discordance in measurements of the Hubble parameter in the early-and late-time Universe [30][31][32][33] has led to many ideas invoking neutrino-sector BSM considerations.…”

Section: Neutrino Frontier 3 -Dark Matter In Neutrino Experimentsmentioning

confidence: 99%

Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)

Boveia¹,

Chen²,

Doglioni³

et al. 2022

Preprint

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The fundamental nature of Dark Matter is a central theme of the Snowmass 2021 process, extending across all frontiers. In the last decade, advances in detector technology, analysis techniques and theoretical modeling have enabled a new generation of experiments and searches while broadening the types of candidates we can pursue. Over the next decade, there is great potential for discoveries that would transform our understanding of dark matter. In the following, we outline a road map for discovery developed in collaboration among the frontiers. A strong portfolio of experiments that delves deep, searches wide, and harnesses the complementarity between techniques is key to tackling this complicated problem, requiring expertise, results, and planning from all Frontiers of the Snowmass 2021 process. Note from the authors: This is the first version of the Cross-Frontier Complementarity report. We welcome feedback or changes (including constructive criticism) that you'd like us to take into account in the next version, on this google document.

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Section: Neutrino Frontier 3 -Dark Matter In Neutrino Experimentsmentioning

confidence: 99%

Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)

Boveia¹,

Chen²,

Doglioni³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Reconstruction and selection efficiency weights.-We implemented (Ω ee ) as a function that is 0 for the events which are not selected, and ¯ for the events that are selected. For Analysis-I, this weight is ¯ = 10% and the selection follows Equation (15). For Analysis-II, this weight is a flat ¯ = 10% for every event.…”

Section: 𝜎 Weightsmentioning

confidence: 99%

“…For a recent review on the status of this topic see Ref. [15]. Since then, theoretical activity in low-scale dark sectors has intensified and, unsurprisingly, new dark-sector solutions to the short-baseline puzzle have been brought to light .…”

Section: Introductionmentioning

confidence: 99%

Efficiently Exploring Multi-Dimensional Parameter Spaces Beyond the Standard Model

Argüelles¹,

Foppiani²,

Hostert³

2022

Preprint

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It is likely that if light dark sectors exist, they would contain not one, but several new particles. Their self-interactions can often lead to exotic and thus-far unexplored experimental signatures, requiring repeated use of costly Monte Carlo simulations in d-dimensional parameter spaces. We propose a simple method to overcome the curse of dimensionality for large d by using kernel density estimators and re-weighing schemes. We apply our technique to set new limits on a short-lived heavy neutrino N , proposed as an explanation of anomalies in neutrino experiments. Using a backgroundfree search for lepton pairs in the T2K near detector, we find an exclusion of this model for N lifetimes greater than cτ 0 /mN 2 cm/GeV. With a single Monte Carlo simulation, we obtain the differential event rate for arbitrary choices of model parameters, allowing us to cast limits on any slice of the model parameter space. This method can help boost the coverage of model parameters in future experimental searches.

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“…There are additional constraints in the parameters space of light sterile neutrinos coming from oscillation experiments (see Ref. [127] for a recent review and references therein for a detailed description of existing limits). We leave the study of the rich phenomenology expected in that case to a future work.…”

Section: B Reinterpretation Of Light Sterile Neutrino Parameter Spacementioning

confidence: 99%

Cosmology-friendly time-varying neutrino masses via the sterile neutrino portal

Huang,

Lindner,

Martínez-Miravé

et al. 2022

Preprint

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We investigate a consistent scenario of time-varying neutrino masses, and discuss its impact on cosmology, beta decay, and neutrino oscillation experiments. Such time-varying masses are assumed to be generated by the coupling between a sterile neutrino and an ultralight scalar field, which in turn affects the light neutrinos by mixing. We demonstrate how various cosmological bounds, such as those coming from Big Bang nucleosynthesis, the cosmic microwave background, as well as large scale structures, can be evaded in this model. This scenario can be further constrained using multiple terrestrial experiments. In particular, for beta-decay experiments like KATRIN, non-trivial distortions to the electron spectrum can be induced, even when time-variation is fast and gets averaged out. Furthermore, the presence of time-varying masses of sterile neutrinos will alter the interpretation of light sterile neutrino parameter space in the context of the reactor and gallium anomalies. In addition, we also study the impact of such time-varying neutrino masses on results from the BEST collaboration, which have recently strengthened the gallium anomaly. If confirmed, we find that the time-varying neutrino mass hypothesis could give a better fit to the recent BEST data.

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White Paper on Light Sterile Neutrino Searches and Related Phenomenology

Cited by 16 publications

References 574 publications

Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)

Snowmass 2021 Cross Frontier Report: Dark Matter Complementarity (Extended Version)

Efficiently Exploring Multi-Dimensional Parameter Spaces Beyond the Standard Model

Cosmology-friendly time-varying neutrino masses via the sterile neutrino portal

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