论文标题
LHC与Alice的PP和P-PB碰撞中的魅力生产和强调
Charm production and hadronization in pp and p-Pb collisions at the LHC with ALICE
论文作者
论文摘要
Alice在LHC的合作进行了PP和\ PPB碰撞中的开放式强体产生的研究，以研究魅力Quark强调机制。 Charm Meson（$ {\ rm d^0} $，$ {\ rm d^+} $，$ {\ rm d^+_ {\ rm s}} $的最新测量值$之一Charm横截面和$ \ sqrt {s} $ = 5.02 TEV的片段分数具有前所未有的精度。测量结果表明，碎片分数与以$ {\ rm e^+e^ - } $和\ ep碰撞的测量分数明显不同。这突出了电子诱导的碰撞和LHC的PP碰撞之间可能存在的差异。此外，将讨论Baryon与Meson的产量比$λ^+_ {\ rm c}/{\ rm d^0} $，下降到$ p _ {\ rm t} = 0 $ in PP和\ ppb碰撞。在P-PB碰撞中，由于冷核物质效应和集体现象，可能存在强膦机制的修饰。数据和模型计算之间的系统比较将有助于了解PP和P-PB碰撞中的魅力夸克强调。
Studies of open-charm hadron production in pp and \pPb collisions are performed by the ALICE Collaboration at the LHC to investigate charm-quark hadronization mechanisms. Recent measurements of charm meson (${\rm D^0}$, ${\rm D^+}$, ${\rm D^+_{\rm s}}$, and ${\rm D^{*+}}$) and baryon ($Λ^+_{\rm c}$, $Ξ^{0,+}_{\rm c}$, $Σ^{0,++}_{\rm c}$, and $Ω^0_{\rm c}$) production in pp collisions at $\sqrt{s}$ = 5.02 TeV and $\sqrt{s}$ = 13 TeV allow the determination of the charm cross section and the fragmentation fractions at $\sqrt{s}$ = 5.02 TeV with unprecedented precision. The measurements show that the fragmentation fractions significantly differ from the ones measured in ${\rm e^+e^-}$ and \ep collisions. This highlights possible differences in the hadronization process between electron induced collisions and pp collisions at the LHC. \\ Furthermore, the first measurement of the baryon-to-meson yield ratio $Λ^+_{\rm c}/{\rm D^0}$, down to $p_{\rm T}=0$ in pp and \pPb collisions will be discussed. In p--Pb collisions a modification of the hadronization mechanisms could be present due to cold nuclear matter effects and collective phenomena. A systematic comparison between data and model calculations will help to understand charm quark hadronization in pp and p--Pb collisions.
