论文标题
提示的$ d^0 $核修饰因子的测量$ p $ pb碰撞在$ \ sqrt {s_ \ mathrm {nn}}} = 8.16 $ tev
Measurement of the prompt $D^0$ nuclear modification factor in $p$Pb collisions at $\sqrt{s_\mathrm{NN}} = 8.16$ TeV
论文作者
论文摘要
$ d^0 $媒介在质子导向碰撞中的$ d^0 $介子的产生，以每个核心核能对$ \ sqrt {s_ \ mathrm {nn}} = 8.16〜 \ mathrm {tev} $测量。提示的核修饰因子$ d^0 $梅森是根据横向动量$ p_ \ mathrm {t} $的函数确定的，并且在nucleon-nucleon质量中心框架$ y^*$中的速度。在远期速度区域中，测量了相对于$ pp $碰撞的产生，从而极大地抑制了核parton分布的重大限制和强子生产，直至非常低的Bjorken- $ x $ x $区域$ \ sim 10^{ - 5} $。 In the backward rapidity region, a suppression with a significance of 2.0 - 3.8 standard deviations compared to nPDF expectations is found in the kinematic region of $p_\mathrm{T}>6~\mathrm{GeV}/c$ and $-3.25<y^*<-2.5$, corresponding to $x\sim 0.01$.
The production of prompt $D^0$ mesons in proton-lead collisions in the forward and backward configurations at a center-of-mass energy per nucleon pair of $\sqrt{s_\mathrm{NN}} = 8.16~\mathrm{TeV}$ is measured by the LHCb experiment. The nuclear modification factor of prompt $D^0$ mesons is determined as a function of the transverse momentum $p_\mathrm{T}$, and rapidity in the nucleon-nucleon center-of-mass frame $y^*$. In the forward rapidity region, significantly suppressed production with respect to $pp$ collisions is measured, which provides significant constraints of nuclear parton distributions and hadron production down to the very low Bjorken-$x$ region of $\sim 10^{-5}$. In the backward rapidity region, a suppression with a significance of 2.0 - 3.8 standard deviations compared to nPDF expectations is found in the kinematic region of $p_\mathrm{T}>6~\mathrm{GeV}/c$ and $-3.25<y^*<-2.5$, corresponding to $x\sim 0.01$.
