Speaker
Andrea Longhin
(LNF)
Description
Neutrino cross section measurements are an essential requirement for
the next generation of neutrino oscillation experiments and they are
presently limited by uncertainties on neutrino fluxes. In [1] we propose
to instrument a neutrino decay tunnel to detect large angle
positrons and tag the three-body semileptonic $K^+ \to e^+ \pi^0 \nu_e$
decays. In such a facility the absolute electron neutrino flux could
be determined with unprecedented precision (O(1\%)).
An $e^+$/$\pi$ separation capability of about 2\% as well as a high $e^+$
efficiency is required for a diffuse particle source over a length of
several tens of meters. Additional constraints, due to the harsh beam
environment, involve radiation hardness and fast response.
For this purpose we propose a specialised shashlik calorimeter
(copper-scintillator) with a compact readout based on small-area
Silicon PhotoMultipliers coupled to WLS fibers. The setup would allow
an effective longitudinal segmentation for electron/hadron separation,
reducing the dead zones introduced by fiber bundling. Detailed Monte
Carlo simulations are in progress. The construction of a small
prototype and exposures to pion and electron beams are foreseen.
[1] A. Longhin, L. Ludovici and F. Terranova,
"A novel technique for the measurement of the electron neutrino cross section",
arXiv:1412.5987 [hep-ex], submitted to European Physical Journal C.
Collaboration
A. Longhin, L. Ludovici, F. Terranova
Primary authors
Andrea Longhin
(LNF)
Francesco Terranova
(MIB)
Lucio Ludovici
(ROMA1)
