Exploring the standard model and beyond from the evidence of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>CE</mml:mi> <mml:mi>ν</mml:mi> <mml:mi>NS</mml:mi> </mml:mrow> </mml:math> with reactor antineutrinos in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:mi>CONUS</mml:mi> <mml:mo>+</mml:mo> </mml:mrow> </mml:math>

Abstract

The observation of the coherent elastic neutrino-nucleus scattering process using reactor antineutrinos offers a unique opportunity to probe the Standard Model and explore beyond the Standard Model scenarios. This study reports on the latest results from the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mrow> <a:mi>CONUS</a:mi> <a:mo>+</a:mo> <a:mtext>experiment</a:mtext> </a:mrow> </a:math> conducted at the Leibstadt nuclear power plant in Switzerland. The CONUS collaboration reports <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"> <c:mn>395</c:mn> <c:mo>±</c:mo> <c:mn>106</c:mn> </c:math> events detected from reactor antineutrinos with an exposure of <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"> <e:mrow> <e:mn>327</e:mn> <e:mtext> </e:mtext> <e:mtext> </e:mtext> <e:mi>kg</e:mi> <e:mo>·</e:mo> <e:mi>days</e:mi> </e:mrow> </e:math> , utilizing high-purity germanium detectors operated at sub-keV thresholds. A <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:msup> <g:mi>χ</g:mi> <g:mn>2</g:mn> </g:msup> </g:math> -based statistical analysis was performed on these results, incorporating systematic uncertainties. This analysis was used to extract the weak mixing angle, establish a limit on the neutrino magnetic moment, and impose constraints on neutrino nonstandard interactions using reactor antineutrinos. The results confirm the potential of coherent elastic neutrino-nucleus scattering experiments in the study of fundamental neutrino properties and probing new physics.

Topics & Concepts