First evidence of coherent $K^{+}$ meson production in neutrino-nucleus scattering

Abstract

Neutrino-induced charged-current coherent kaon production, ${\nu }_{\mu }A\to {\mu }^{-}{K}^{+}A$, is a rare, inelastic electroweak process that brings a $K^{+}$ on shell and leaves the target nucleus intact in its ground state. This process is significantly lower in rate than neutrino-induced charged-current coherent pion production, because of Cabibbo suppression and a kinematic suppression due to the larger kaon mass. We search for such events in the scintillator tracker of MINERvA by observing the final state $K^{+}$, ${\mu }^{-}$ and no other detector activity, and by using the kinematics of the final state particles to reconstruct the small momentum transfer to the nucleus, which is a model-independent characteristic of coherent scattering. We find the first experimental evidence for the process at $3\sigma$ significance.

added ancillary file with information about the six kaon candidates

References in corpus (8)

• PYTHIA 6.4 Physics and Manual
• Big-Bang Nucleosynthesis
• Inclusive production of charged pions in p+C collisions at 158 GeV/c beam momentum
• Search for Charged Current Coherent Pion Production on Carbon in a Few-GeV Neutrino Beam
• PCAC and the Deficit of Forward Muons in pi^+ Production by Neutrinos
• Measurement of Coherent Production of ${\pi }^{\pm }$ in Neutrino and Anti-Neutrino Beams on Carbon from $E_{\nu }$ of $1.5$ to $20$ GeV
• Coherent Pion Production
• First Measurement of Neutrino and Antineutrino Coherent Charged Pion Production on Argon

Cited by in corpus (2)

• Exploring Neutrino-Nucleus Interactions in the GeV Regime using MINERvA
• Measurements of the ${\nu }_{\mu }$ and ${\bar{\nu }}_{\mu }$-induced Coherent Charged Pion Production Cross Sections on ${}^{12}C$ by the T2K experiment