论文标题
$ j/ψ$和$ d^0 $生产$ \ sqrt {s _ {\ rm nn}} $ = 68.5 GEV PBNE碰撞
$J/ψ$ and $D^0$ production in $\sqrt{s_{\rm NN}}$ = 68.5 GeV PbNe collisions
论文作者
论文摘要
报告了LHCB实验中$ j/ψ$和$ d^0 $生产的首次测量，以其固定目标配置。研究了$ j/ψ$和$ d^0 $介子的生产，并用一束铅离子束，每个核子的能量为2.5 teV，在静止的气态霓虹灯目标上碰撞，对应于nucleon-nucleon centre中心能量$ \ sqrt { $ j/ψ/d^0 $生产横截面比是速度，横向动量和碰撞中心性的函数。将这些数据与$ p $ ne碰撞的测量值进行比较，并且在比较$ j/ψ$ pissision趋势的$ ne和pbne外围碰撞与PBNE中央碰撞时没有差异。
The first measurement of $J/ψ$ and $D^0$ production in PbNe collisions by the LHCb experiment in its fixed-target configuration is reported. The production of $J/ψ$ and $D^0$ mesons is studied with a beam of lead ions with an energy of 2.5 TeV per nucleon colliding on gaseous neon targets at rest, corresponding to a nucleon-nucleon centre-of-mass energy of $\sqrt{s_{\rm NN}}$ = 68.5 GeV. The $J/ψ/D^0$ production cross-section ratio is studied as a function of rapidity, transverse momentum and collision centrality. These data are compared with measurements from $p$Ne collisions at the same energy and show no difference in the observed $J/ψ$ suppresion trend when comparing $p$Ne and PbNe peripheral collisions with PbNe central collisions.
