Constraints on flavor-diagonal non-standard neutrino interactions from Borexino Phase-II

By S. Agarwalla, S. Appel, D. Bravo, L. Miramonti, G. Ranucci, V. Muratova, A. Caminata, M. Gromov, F. Ortica, S. Zavatarelli and 96 more. Journal of High Energy Physics, 2019

354 citations recorded by the source corpus.

The Borexino detector measures solar neutrino fluxes via neutrino-electron elastic scattering. Observed spectra are determined by the solar-νe survival probability Pee(E), and the chiral couplings of the neutrino and electron. Some theories of physics beyond the Standard Model postulate the existence of Non-Standard Interactions (NSI’s) which modify the chiral couplings and Pee(E). In this paper, we search for such NSI’s, in particular, flavor-diagonal neutral current interactions that modify the νee and ντe couplings using Borexino Phase II data. Standard Solar Model predictions of the solar neutrino fluxes for both high- and low-metallicity assumptions are considered. No indication of new physics is found at the level of sensitivity of the detector and constraints on the parameters of the NSI’s are placed. In addition, with the same dataset the value of sin2θW is obtained with a precision comparable to that achieved in reactor antineutrino experiments .

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e291bb52fcad06ffa62e701c0ceea7a5f94072e8

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

Citations in the corpus

Exploring ν signals in dark matter detectors (2012, background): “We will now turn our attention to scattering processes for which the recoil energy spectrum falls even more steeply (∝ E−2r ), and hence a larger enhancement of the neutrino scattering rate at low energies is possible without violating the Borexino constraint.”
JUNO physics and detector (2021, neutral): “The measurement of 7Be neutrino flux can be useful for solving the “metallicity problem” in solar physics, searching for neutrino magnetic moment [95] and flavor-diagonal non-standard neutrino interactions [96].”
New constraints on oscillation parameters fromνeappearance andνμdisappearance in the NOvA experiment (2018, result): “Previous ﬁts of the parameters in the Birks model for scintillator quenching with a second-order term [52], using proton tracks in candidate ND ν µ CC quasielastic-like events in data, obtained values inconsistent with other measurements of Birks quenching in liquid scintillator [53, 54].”
Low-energy-threshold analysis of the Phase I and Phase II data sets of the Sudbury Neutrino Observatory (2010, methodology): “[10] C. Arpesella et al. (Borexino Collaboration), Phys.”