Abstract
A recent new measurement and re-analysis of past measurements suggested an improved quenching factor value and uncertainty for CsI[Na]. This implies a measurement of the COHERENT experiment of coherent elastic neutrino-nucleus scattering that is closer to the Standard Model prediction and has less uncertainty. We illustrate the impact of this improvement by revisiting fits to the Weinberg angle, neutrino magnetic moments, neutron rms and neutrino charge radii, neutrino non-standard interactions (in particular those relevant for LMA-Dark) and new scalar as well as vector bosons. Significant improvement is observed, particularly for those scenarios coherently affecting the electroweak SM process.
Highlights
Coherent elastic neutrino-nucleus scattering (CEνNS) has been predicted in 1974 [1], but not been observed before 2017 [2]
The importance of the process ranges from its ability to probe Standard Model parameters at low momentum transfer [3,4,5], test new neutrino physics and new neutral currents in general [4,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25], sterile neutrino searches [12,20,21,26,27], implications for supernova physics [28,29,30], dark matter searches [31,32,33,34,35], neutrino magnetic moments [3,5,12,18,36,37], nuclear physics [38,39,40,41] and its connection to gravitational waves [42,43]
As suggested in [44], physics extracted from the measurement would significantly improve when taking into account the new quenching factor (QF)-values and uncertainty
Summary
Coherent elastic neutrino-nucleus scattering (CEνNS) has been predicted in 1974 [1], but not been observed before 2017 [2]. As suggested in [44], physics extracted from the measurement would significantly improve when taking into account the new QF-values and uncertainty. We perform in this paper, as illustration of the impact of improved quenching understanding, a fit to COHERENT data taking into account the new QF value and uncertainty. We consider several parameters that can be extracted from CEνNS, namely the Weinberg angle, neutrino magnetic moment and charge radii, the neutron rms charge radius, neutrino nonstandard interactions, as well as couplings and masses of new vector and scalar bosons mediating CEνNS.
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