CERN Accelerating science

Left panel: distribution of $z_t$ for the events with only two reconstructed hadrons with opposite charge. The exclusive events are selected by the cut $z_t>0.95$. Right panel: $z$ distribution for the positive hadron of the selected pairs.

Left panel: distribution of $z_t$ for the events with only two reconstructed hadrons with opposite charge. The exclusive events are selected by the cut $z_t>0.95$. Right panel: $z$ distribution for the positive hadron of the selected pairs.

Distribution of $|\phi_h|$ (left panel) and correlation between $z$ and $|\phi_h|$ (right panel) for positive exclusive-VM hadrons.

Distribution of $|\phi_h|$ (left panel) and correlation between $z$ and $|\phi_h|$ (right panel) for positive exclusive-VM hadrons.

First column: $a^{UU,excl}_{\cos\phi_h}$ amplitude for $h^+$ (red squares) and $h^-$ (black squares). Second column: $r\,a^{UU,excl}_{\cos\phi_h}$ for $h^+$ (red squares) and $h^-$ (black squares). Third column: $A^{UU}_{\cos\phi_h}$ asymmetry after the subtraction of exclusive-VM hadron contribution for $h^+$ (red circles) and $h^-$ (black circles). Last column: comparison between the asymmetry for $h^+$ before (open circles) and after (full circles) exclusive-VM hadron subtraction. From bottom to top, results for increasing values of $z$ are shown, as indicated on the very right of the figure. All the results refer to the first $p_T^h$ bin (0.1~GeV/c~$

Fraction $r$ of exclusive-VM hadrons evaluated as function of $x$ in the different $z$ and $p_T^h$ bins.

SIDIS $A^{UU}_{\cos\phi_h}$ asymmetry on $^6$LiD for $h^+$ (red circles) and $h^-$ (black circles) after subtracting from the published asymmetry \cite{Adolph:2014pwc} the contribution of exclusive-VM hadrons, as function of $x$, in $z$ and $p_T^h$ bins. Inner error bars denote statistical uncertainties, outer ones statistical and systematic uncertainties added in quadrature.

SIDIS $A^{UU}_{\cos 2\phi_h}$ asymmetry on $^6$LiD for $h^+$ (red circles) and $h^-$ (black circles) after subtracting from the published asymmetry \cite{Adolph:2014pwc} the contribution of exclusive-VM hadrons, as function of $x$, in $z$ and $p_T^h$ bins. Inner error bars denote statistical uncertainties, outer ones statistical and systematic uncertainties added in quadrature.

Comparison between the SIDIS $A^{UU}_{\cos \phi_h}$ asymmetry, as function of $x$, in $z$ and $p_T^h$ bins, for $h^+$ on $^6$LiD after subtracting the exclusive-VM hadron contribution (closed circles) and the results of a Monte Carlo simulation (open squares) which includes the Cahn effect. Inner error bars denote statistical uncertainties, outer ones statistical and systematic uncertainties added in quadrature.