Neutral current cross-sections for neutrinos on protons

Abstract

Defining the ratios r_p=σ(vp→vx)/σ(vp→μ ^- x) and r̅_p= σ(ν̅p→ν̅x)/σ(ν̅p→μ₊x) we obtain the bounds 0.28 ≤r_p ≤ 0.61 and 0.15 ≤ r̅_p ≤ 0.37 using only the parton model and the data of CDHS group with iron target. We also give the complete set of parton-model relations which would allow the determination of all the neutral-current coupling constants from inclusive cross sections alone.