Left: $\pt$-differential production cross section of muons from heavy flavour decays in the rapidity range $2.5 < y < 4$. Right:y-differential production cross section of muons from heavy flavour decays, in the range $2 < p_{\rm t} < 12$ GeV/$c$. In both panels, the error bars (empty boxes) represent the statistical (systematic) uncertainties. A 3.5$\%$ normalization uncertainty is not shown. The solid curves are FONLL calculations and the bands display the theoretical systematic uncertainties. Also shown, are the FONLL calculations and systematic theoretical uncertainties for muons from charm (long dashed curves) and beauty(dashed curves) decays. The lower panels show the corresponding ratios between data and FONLL calculations. | |