# Study of prompt $D^0$ meson production in $p$Pb at $\sqrt{s_{\mathrm{NN}}}= 8.16$ TeV at LHCb

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## Abstract

The production of prompt $D ^0$ mesons in proton-lead collisions in the forward and backward configurations is studied. The data are collected with the LHCb detector at a center-of-mass energy per nucleon pair of $\sqrt{s_{\scriptscriptstyle\text{NN}}} =8.16\text{ Te V}$ and correspond to an integrated luminosity of $12.2\pm0.3\text{ nb} ^{-1}$ ($18.6\pm0.5\text{ nb} ^{-1}$) in the forward (backward) configuration. The integrated $D ^0$ and $\overline{ D } {}^0$ cross-sections are measured to be $288.3\pm0.2 (\mathrm{stat.})\pm17.4 (\mathrm{syst.})\text{ mb}$ for the forward rapidity range $1.5<y^*<4$ and $308.9\pm0.1 (\mathrm{stat.})\pm30.5 (\mathrm{syst.})\text{ mb}$ for the backward range,$-5<y^*<-2.5$, in the $p_{\mathrm{T}}$ interval from 0 to 16 $\text{ Ge V /}c$ . A suppression of $D ^0$ production in the forward rapidity region relative to the backward rapidity is observed.

 Fit to the $M( K \pi )$ distributions in the (left) forward and (right) backward collision configurations. The kinematic range is $2.0< p_{\mathrm{T}} <3.0\text{ Ge V /}c ,\ 3.0 ## Tables and captions  Summary of systematic uncertainties, in %. For the forward sample, the kinematic range is$1.5

Created on 06 March 2021.