Search for CEvNS at the SNS with the COHERENT experiment*

The COHERENT experiment at the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source (SNS) aims to study coherent elastic neutrino nucleus scattering (CEvNS) with different detector technologies. The first observation of CEvNS was recently made by the COHERENT experiment with a \SI{14}{\kg} \ce{CsI} detector.\footnote{\href{http://science.sciencemag.org/content/early/2017/08/02/science.aao0990 }{\textit{D. Akimov et al., Science} \textbf{357}, 1123 (2017).}} The result is in agreement with the standard model prediction. This initial data already improves constraints on non-standard neutrino interactions. In addition, COHERENT has a \SI{185}{\kg} \ce{NaI} crystal array, a \about\SI{22}{\kg} \ce{LAr} detector and is planning to deploy a \SI{10}{\kg} \ce{PPC HPGe}. The single-phase \ce{LAr} detector (CENNS-10) started data-taking in Dec. 2016 and will provide results on CEvNS from a light nucleus where nuclear form factors are close to unity. The motivation for CEvNS detection, COHERENT experiment overview, the first CEvNS measurement, and a survey of the future experimental program will be presented.