论文标题
高能质子 - 普罗顿碰撞中魅力 - 巴里昂与膜比的带电粒子多重性依赖性
Charged-particle multiplicity dependence of charm-baryon-to-meson ratio in high-energy proton-proton collisions
论文作者
论文摘要
我们建议，在高能量$ pp $碰撞中观察到的带电粒子多重性依赖性可以通过在统计强化模型（SHM）中对量子电荷的规范处理来解释。从相对论夸克模型的预测中获取PDG的完整粒子列表，并得到了其他魅力 - 巴里昂的态度，我们评估了量子分区函数和符合严格保护量子电荷的要求产生的规范抑制的符合量抑制的魅力 - 哈德隆化学因子。我们证明，尽管魅力数量保护虽然引起了魅力 - 巴里昂人和-Mesons的产生的共同抑制，但巴里昂（陌生）数量保存会导致相对于非符合人物charm-mesons的Charm-Baryons（Charm-Strange Mesons）的进一步抑制，从而导致$λ_c/d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0 $ d^0。然后，将其计算的魅力 - hadron热密度用作相关权重，以执行具有$ p_t $ - 依赖性$λ_c/d^0 $和$ d_s/d^0 $比率的符合$ p_t $ p_t $ - 依赖性的碎片模拟，该模拟在公平协议中具有不同的多重性。
We propose that the charged-particle multiplicity dependence of the charm-baryon-to-meson ratio observed in high-energy $pp$ collisions can be explained by canonical treatment of quantum charges in the statistical hadronization model (SHM). Taking the full particle listings of PDG complemented by additional charm-baryon states from relativistic quark model predictions, we evaluate the canonical partition function and the charm-hadron chemical factors that measure the canonical suppression arising from the requirement of strict conservation of quantum charges. We demonstrate that, while charm number conservation induces common suppression on the production of both charm-baryons and -mesons, baryon (strangeness) number conservation causes further suppression on charm-baryons (charm-strange mesons) relative to nonstrange charm-mesons, thereby resulting in a decreasing $Λ_c/D^0$ ($D_s/D^0$) ratio toward smaller multiplicity events. The charm-hadron thermal densities thus computed are then used as pertinent weights to perform charm-quark fragmentation simulations yielding $p_T$-dependent $Λ_c/D^0$ and $D_s/D^0$ ratios at varying multiplicities in fair agreement with ALICE measurements.
