CERN Accelerating science

Expectations for $\rk$ at $x=0.03$ and $Q^2=1.6$ (GeV/$c)^2$, calculated using \cite{dss01, dss02, lepto} (only central values are shown), as well as the expected lower limit of LO pQCD based on LO MSTW08 PDFs. See text for details.

Acceptance-uncorrected distributions of selected events in the ($Q^2$, $x$) plane and in the ($\nu$, $z$) plane.

Left: The K$^-$ over K$^+$ acceptance ratio in the first $x$-bin as a function of the reconstructed $z$ variable, as obtained from a Monte Carlo simulation. Right: The charged-kaon multiplicity ratio as a function of the lower limit of the RICH likelihood ratio for kaons with momenta between 35 GeV/$c$ and 40 GeV/$c$. The arrow marks the value used in the analysis (see text for more details).

Left: The K$^-$ over K$^+$ acceptance ratio in the first $x$-bin as a function of the reconstructed $z$ variable, as obtained from a Monte Carlo simulation. Right: The charged-kaon multiplicity ratio as a function of the lower limit of the RICH likelihood ratio for kaons with momenta between 35 GeV/$c$ and 40 GeV/$c$. The arrow marks the value used in the analysis (see text for more details).

Results on $\rk$ as a function of $z_{\rm corr}$ for the two $x$-bins. The insert shows the double ratio $D_{\rm K}$ that is the ratio of $\rk$ in the first $x$-bin over $\rk$ in the second $x$-bin. Statistical uncertainties are shown by error bars, systematic uncertainties by bands at the bottom.

Comparison of $\rk$ in the first $x$-bin with predictions discussed in Fig.~\ref{fig:th1}.

The K$^-$ over K$^+$ multiplicity ratio as a function of $\nu$ in bins of $z$, shown for the first bin in $x$.

The K$^-$ over K$^+$ multiplicity ratio presented as a function of $M_X$. See text for details.