Measurement of the A dependence of the νμ charged-current quasielasticlike cross section as a function of muon and proton kinematics at ⟨<…

The first simultaneous measurements of the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>ν</a:mi><a:mi>μ</a:mi></a:msub></a:math> quasielasticlike cross section on C, CH, <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:mrow><c:msub><c:mrow><c:mi mathvariant="normal">H</c:mi></c:mrow><c:mrow><c:mn>2</c:mn></c:mrow></c:msub></c:mrow><c:mi mathvariant="normal">O</c:mi></c:mrow></c:math>, Fe, and Pb targets as a function of kinematic imbalance variables in the plane transverse to the incoming neutrino direction are presented. These variables combine the muon and proton information to provide a new way to disentangle the effects of the nucleus in quasielasticlike processes. The data were obtained using a wideband <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"><g:msub><g:mi>ν</g:mi><g:mi>μ</g:mi></g:msub></g:math> beam with <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"><i:mrow><i:mo stretchy="false">⟨</i:mo><i:msub><i:mrow><i:mi mathvariant="normal">E</i:mi></i:mrow><i:mrow><i:mi>ν</i:mi></i:mrow></i:msub><i:mo stretchy="false">⟩</i:mo><i:mo>∼</i:mo><i:mn>6</i:mn><i:mtext> </i:mtext><i:mtext> </i:mtext><i:mi>GeV</i:mi></i:mrow></i:math>. Cross-section ratios of the different target materials to CH are also shown. These measurements are used to explore the nature of the cross-section <n:math xmlns:n="http://www.w3.org/1998/Math/MathML" display="inline"><n:mi>A</n:mi></n:math> scaling, as well as initial and final state interaction effects. Comparisons are made to predictions from a number of commonly used neutrino Monte Carlo event generators. The range of predictions of the different models tends to cover the data but the degree and consistency of the agreement suffers in regions, and on higher <p:math xmlns:p="http://www.w3.org/1998/Math/MathML" display="inline"><p:mi>A</p:mi></p:math> targets, where the final state interactions are expected to be more pronounced.