Revision 1

Accepted · first revision · record

Title: Size and shape of multinucleon (2p2h) neutrino cross sections
Plain: A neutrino can strike a correlated pair of nucleons at once instead of a single one, knocking out two particles. Different models of this two-nucleon process disagree on how often it happens by up to a factor of about two.
Precise: Determine the two-particle-two-hole (2p2h) charged-current cross section from meson-exchange currents and short-range correlations on 12C, 16O and 40Ar, double-differential in muon momentum and angle for $E_{\nu}=0.5\ \text{to}\ 5\,\mathrm{GeV}$, to 10 percent, together with its neutrino versus antineutrino difference and its proton-proton versus neutron-proton final-state composition. Existing microscopic models (for example Nieves et al., Martini et al., SuSAv2) disagree in normalization and in the energy-transfer distribution.
Settled by: An ab initio or microscopic calculation of 2p2h responses consistent with electron-scattering data in the dip region and with exclusive neutrino data on two-proton final states from argon and carbon detectors.
Kind: well-posed
Answer type: value
References: (empty)
Literature status: open
Status note: (empty)
Posed since: (empty)