The impact of sterile neutrinos on CP measurements at long baselines

Gandhi, Raj; Kayser, Boris; Masud, Mehedi; Prakash, Suprabh

doi:10.1007/jhep11(2015)039

Cited by 78 publications

(93 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recent studies focusing on the future LBNE/DUNE experiment [29] have been recently performed in [30][31][32]. In principle, the CERNPyhäsalmi baseline of 2290 km actively studied under the umbrella of the LBNO collaboration [33,34] can also be very sensitive to these issues.…”

Section: Jhep02(2016)111mentioning

confidence: 99%

Discovery potential of T2K and NOvA in the presence of a light sterile neutrino

Agarwalla

Chatterjee

Dasgupta

et al. 2016

J. High Energ. Phys.

View full text Add to dashboard Cite

Abstract:We study the impact of one light sterile neutrino on the prospective data expected to come from the two presently running long-baseline experiments T2K and NOνA when they will accumulate their full planned exposure. Introducing for the first time, the bi-probability representation in the 4-flavor framework, commonly used in the 3-flavor scenario, we present a detailed discussion of the behavior of the ν µ → ν e andν µ →ν e transition probabilities in the 3+1 scheme. We also perform a detailed sensitivity study of these two experiments (both in the stand-alone and combined modes) to assess their discovery reach in the presence of a light sterile neutrino. For realistic benchmark values of the mass-mixing parameters (as inferred from the existing global short-baseline fits), we find that the performance of both these experiments in claiming the discovery of the CP-violation induced by the standard CP-phase δ 13 ≡ δ, and the neutrino mass hierarchy get substantially deteriorated. The exact loss of sensitivity depends on the value of the unknown CP-phase δ 14 . Finally, we estimate the discovery potential of total CP-violation (i.e., induced simultaneously by the two CP-phases δ 13 and δ 14 ), and the capability of the two experiments of reconstructing the true values of such CP-phases. The typical (1σ level) uncertainties on the reconstructed phases are approximately 40 0 for δ 13 and 50 0 for δ 14 .

show abstract

Section: Jhep02(2016)111mentioning

confidence: 99%

Discovery potential of T2K and NOvA in the presence of a light sterile neutrino

Agarwalla

Chatterjee

Dasgupta

et al. 2016

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…Going beyond the recent studies revealing how potential new physics scenarios can hinder the clean determination of this important parameter [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34], we address the issue of clean separation of the intrinsic leptonic CP phase from the extrinsic contribution arising due to SI as well as new physics 7 . We also show the impact of new physics on testing non-unitarity.…”

Section: Discussionmentioning

confidence: 99%

“…We also probe deviations due to new physics scenarios. We go beyond the SM in two respects -one in which we introduce subdominant effects due to a possible source of new physics dubbed as NSI [17][18][19][20][21][22][23][24][25][26] and another where the presence of extra sterile state can lead to non-unitarity in the 3×3 part even though the overall mixing matrix is still unitary [27][28][29][30][31][32][33][34] and examine consequences relevant to long baseline experiments (For other new physics scenarios such as non-unitarity, see [35][36][37][38][39]). We highlight the regions in L − E space where the effects due to CP and T violation are drastically modified due to new physics.…”

Section: Present Status Of Three Generation Neutrino Parametersmentioning

confidence: 99%

Can we probe intrinsic CP and T violations and nonunitarity at long baseline accelerator experiments?

2017

Self Cite

View full text Add to dashboard Cite

One of the fundamental parameters entering neutrino oscillation framework is the leptonic CP phase δ 13 and its measurement is an important goal of the planned long baseline experiments. It should be noted that ordinary matter effects complicate the determination of this parameter and there are studies in literature that deal with separation of intrinsic versus extrinsic CP violation. It is important to investigate the consequences of new physics effects that can not only hamper the measurement of δ 13 , but also impact the consequences of discrete symmetries such as CP, T and unitarity in different oscillation channels. In the present work, we explore these discrete symmetries and implications on unitarity in presence of two new physics scenarios (non-standard interaction in propagation and presence of sterile neutrinos) that serve as good examples of going beyond the standard scenario in different directions. We uncover the impact of new physics scenarios on disentangling intrinsic and extrinsic CP violation.

show abstract

“…In particular, searches for an sterile oscillations at the far detector of LBL experiments have been performed by several collaborations using neutral-current (NC) events in their analysis [3,4,6,8]. Several phenomenological studies have considered the sterile effects at LBL experiments by the use of charge-current events [9,10,11,12,13,14,15]. Here, we summarize the formalism, the main assumptions, and some of the analysis performed in Ref [1] using NC events at the DUNE FD.…”

Section: Introductionmentioning

confidence: 99%

DUNE Sensitivities to the mixing between Sterile and Tau Neutrinos

Forero¹

2018

Proceedings of the 19th International Workshop on Neutrinos From Accelerators NUFACT2017 — PoS(NuFact2017)

View full text Add to dashboard Cite

Most of neutrino events observed from neutrinos produced in the Sun, from interactions in the Earth atmosphere, and neutrinos from artificial sources such as the ones produced in reactor and accelerator-based experiments are well described by neutrino oscillations within the three active neutrino framework. However, the existence of extra light sterile neutrino states, mainly motivated by different anomalies (like LSND and reactor), has not been yet established. In order to reject the light sterile hypothesis (or to discover a new oscillation phase around the eV scale), an enormous effort is being pursued by current and future experimental collaborations. In this talk (based on the work [1]) I will focus on the role of the long-baseline (LBL) neutrino experiments, in particular DUNE, to constrain the tau-sterile mixing angle in the economical framework of having only one extra light sterile neutrino state. As it will be discussed, at LBL experiments the neutral-current data is directly sensitive to the presence of light sterile neutrinos.

show abstract

The impact of sterile neutrinos on CP measurements at long baselines

Cited by 78 publications

References 39 publications

Discovery potential of T2K and NOvA in the presence of a light sterile neutrino

Discovery potential of T2K and NOvA in the presence of a light sterile neutrino

Can we probe intrinsic CP and T violations and nonunitarity at long baseline accelerator experiments?

DUNE Sensitivities to the mixing between Sterile and Tau Neutrinos

Contact Info

Product

Resources

About