论文标题
$ x（3872）$的性质，来自高型$ pp $ collisision
The nature of $X(3872)$ from high-multiplicity $pp$ collisions
论文作者
论文摘要
在过去的二十年中，异国情调共振的结构不适合通常的夸克模型期望。估计这些状态规模的一种可能方法是研究浸入QCD物质时的行为。最近，LHCB测量了与普通$ψ（2s）$相比的异国$ x（3872）$的相对丰度。我们使用Comover交互模型来研究紧凑型$ X（3872）$的产量。为了确认该模型在高质量$ pp $碰撞中的可靠性，我们描述了对地面$υ$ state的兴奋的抑制。有了这一点，我们表明紧凑型$ x（3872）$的大小将大于$ψ（2s）$的大小。如果假定$ x（3872）$是大尺寸的介子分子，我们认为应通过杜特隆生产的数据表明，应通过聚结模型来描述其在QCD物质中的演变。我们表明，该模型对$ x（3872）$的预测与数据相反。
The structure of exotic resonances that do not trivially fit the usual quark model expectations has been a matter of intense scientific debate during the last two decades. A possible way of estimating the size of these states is to study their behavior when immersed in QCD matter. Recently, LHCb has measured the relative abundance of the exotic $X(3872)$ over the ordinary $ψ(2S)$. We use the comover interaction model to study the yield of a compact $X(3872)$. To confirm the reliability of the model in high-multiplicity $pp$ collisions, we describe the suppression of excited over ground $Υ$ states. With this at hand, we show that the size of the compact $X(3872)$ would be slightly larger than that of the $ψ(2S)$. If the $X(3872)$ is instead assumed to be a meson molecule of large size, we argue that its evolution in QCD matter should be described via a coalescence model, as suggested by data on deuteron production. We show that the predictions of this model for the $X(3872)$ are in contrast with data.
