"Figure 9b" of "Jet properties from dihadron correlations in p+p collisions at s**(1/2) = 200-GeV"

The properties of jets produced in $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV are measured using the method of two particle correlations. The trigger particle is a leading particle from a large transverse momentum jet while the associated particle comes from either the same jet or the away-side jet. Analysis of the angular width of the near-side peak in the correlation function determines the jet fragmentation transverse momentum $j_T$. The extracted value, $\sqrt{}$ = 585 +/- 6(stat.) +/- 15(syst.) MeV/$c$, is constant with respect to the trigger particle transverse momentum, and comparable to the previous lower $\sqrt{s}$ measurements. The width of the away-side peak is shown to be a convolution of $j_T$ with the fragmentation variable, $z$, and the partonic transverse momentum, $k_T$. The $$ is determined through a combined analysis of the measured $\pi^0$ inclusive and associated spectra using jet fragmentation functions measured in $e^+$$e^-$ collisions. The final extracted values of $k_T$ are then determined to also be independent of the trigger particle transverse momentum, over the range measured, with value of $\sqrt{}$ = 2.68 +/- 0.07(stat.) +/- 0.34(syst.) GeV/$c$.