论文标题
LHCB的（超 - ）外围PBPB碰撞中的Quarkonia生产
Quarkonia production in (ultra-)peripheral PbPb collisions at LHCb
论文作者
论文摘要
连贯的\ JPSI和\ \ \ \ \ fsitwos在超核核中心能量$ 5.02 \，\ mathrm {tev} $中的跨核PBPB碰撞中的横截面是使用$ \ lhcb $和差异性分离的，是在2018年收集的数据样本中测量的。在外围PBPB碰撞中研究了\ JPSI介子的照片产生，\ JPSI候选者是通过迅速衰减重建\ jpsi候选者的速度\ mumu，在2.0美元<y <y <4.5 $的速度区域中。这些结果显着改善了先前的测量，并与最新的理论预测进行了比较。
The cross-sections of coherent \jpsi and \psitwos production in ultra-peripheral PbPb collisions at a nucleon-nucleon center-of-mass energy of $5.02\,\mathrm{TeV}$ are measured using a data sample collected in 2018 at $\lhcb$, and the differential cross-sections are measured separately as a function of transverse momentum and rapidity. The photo-production of \jpsi mesons at low transverse momentum is studied in peripheral PbPb collisions, \jpsi candidates are reconstructed through the prompt decay into \mumu in the rapidity region of $2.0<y<4.5$. These results significantly improve previous measurements and are compared to the latest theoretical predictions.
