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We investigate the effects of a Non-Standard Interaction (NSI) extension ofthe standard model of particle physics on solar neutrino flavour oscillations.This NSI model introduces a $U_{Z^\prime}(1)$ gauge symmetry through a$Z^\prime$ boson that mixes with the photon, creating a neutral current betweenactive neutrinos and matter fields via a unique coupling to up and down quarks.The interaction is defined by a single parameter, $\zeta_o$, which is relatedto the $Z^\prime$ boson's mass $m_{Z^\prime}$ and coupling constant$g_{Z^\prime}$. Notably, this model relaxes the bounds on Coherent ElasticNeutrino-Nucleus Scattering experiments and fits the experimental values of theanomalous magnetic dipole moment of the muon. In this study, we use solarneutrino measurements and an up-to-date standard solar model to evaluate theneutrino flavour oscillations and assess the constraints on $\zeta_o$. Ourstudy indicates that the NSI model aligns with the current solar neutrino datawhen $\zeta_o$ is between $-0.7$ and $0.002$. These models have $\chi^2_{\nu}$values equal to or better than the standard neutrino flavor oscillation model,which stands at a $\chi^2_{\nu}$ of 3.12. The best NSI model comes with a$\zeta_o$ value of -0.2 and a $\chi^2_{\nu}$ of 2.96. Including extra data fromthe Darwin experiment in our analysis refines the range of $\zeta_o$ valuesfrom $-0.7$ to $0.002$, down to $-0.5$ to $-0.002$. These results hint at thepossible existence of novel interactions, given that NSI models achieve acomparable or superior fit to the solar neutrino data when contrasted with theprevailing standard model of neutrino flavour oscillation.

Exploring nonstandard quark interactions through solar neutrino studies