Measurement of the Cross Section ofνμ+e−→νμ+e−

Abstract

The result of a measurement of $\sigma ({\nu }_{\mu }+e^{-}\to {\nu }_{\mu }+e^{-})$ is presented. With use of neutrinos of mean energy 1.5 GeV from the Brookhaven National Laboratory alternating gradient synchrotron and a massive, active, high-resolution detector, a signal of 51±9 events with an average signal-to-background ratio greater than 2:1 is observed. $\sigma ({\nu }_{\mu }{e}^{-}\to {\nu }_{\mu }{e}^{-})=[1.60\mathrm{}\pm 0.29(\mathrm{stat})\pm 0.26(\mathrm{sys}\left)\right]E_{\nu }\left(\mathrm{GeV}\right)\times {10}^{-42\mathrm{}}$ ${\mathrm{cm}}^2$ is obtained.