论文标题
焦点的媒介中膜光生生摄取
Vector meson photoproduction in UPCs with FoCal
论文作者
论文摘要
我们讨论了使用在Alice实验上安装的高颗粒度焦点检测器的光子诱导测量值的物理前景，覆盖了伪型间隔$ 3.4 \ leq leqη\ leq 5.8 $。该新的检测器计划从Run 4运营，将以前所未有的方式探索Bjorken-$ x $物理区域的小型探测器。在该区域，预计Gluon饱和现象将是主导的。结合其余的爱丽丝亚探测器（包括零度量热量器），焦点将以独立于模型的方式来重建媒介中的媒介的测得的光增生截面，以广泛的光子靶向能量范围内，下降到$ x $的$ x $，售价为$ 7 \ \ \ 6} $ 6} $ $ 6}的$ 2} $ 2^{$ 2^{$ 2^{$ 2^{$ 2^{$ 2^{$ 2^{$ 2^air timp tirm $ 2^\ $ 2.光子 - 普罗顿和光子 - 铅碰撞。
We discuss the physics prospects of photon-induced measurements using the high-granularity FoCal detector to be installed at the ALICE experiment, covering the pseudorapidity interval $3.4 \leq η\leq 5.8$. This new detector, scheduled to be in operation from Run 4, will explore the small Bjorken-$x$ physics region in an unprecedented way. In this region the gluon saturation phenomenon is expected to be dominant. Combined with the rest of the ALICE subdetectors, including the zero degree calorimenters, FoCal will serve to reconstruct in a model-independent way the measured photoproduction cross sections for vectors mesons in a wide range of photon-target energies, down to $x$ values of about $7\times 10^{-6}$ and $2\times 10^{-6}$ in ultra-peripheral photon--proton and photon--lead collisions, respectively.
