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排他性反应$pp \to pp K^{*0} \bar{K}^{*0}$的研究：$f_{2}(1950)$共振与衍射连续谱

Study of the exclusive reaction $pp \to pp K^{*0} \bar{K}^{*0}$: $f_{2}(1950)$ resonance versus diffractive continuum

Piotr Lebiedowicz

备注：
21 pages, 7 figures
发表信息：
Phys. Rev. D 103, 054039 (2021)
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摘要：

我们提出了第一个预测的横截面和微分分布的独家反应$pp \to pp K^{*0} \bar{K}^{*0}$的$K^{+} K^{-} π^{+} π^{-}$通道。反应的振幅内制定的非微扰张量pomeron的方法。我们分别考虑了$f_{2}(1950)$ $s$ -通道交换机制和$K^{*0}$ $t/u$ -通道交换机制，着重于它们的特异性。第一种机制是张量胶球的中心衍射产生的候选者，第二种机制是不可约连续。我们调整我们的模型的参数，假设坡密子-坡密子融合的优势，WA 102的实验数据。我们发现，包括连续贡献单独一个可以合理地描述WA 102数据。我们目前的预测反应$pp \to pp (K^{*0} \bar{K}^{*0} \to K^{+} K^{-} π^{+} π^{-})$的ALICE，ATLAS，CMS和LHCb实验，包括典型的运动学削减。我们发现，从我们的模型的$σ\cong 17-250$ nb的LHC实验的横截面，取决于假设的削减。我们的分析包括吸收效应。

英文摘要：

We present first predictions of the cross sections and differential distributions for the exclusive reaction $pp \to pp K^{*0} \bar{K}^{*0}$ contributing to the $K^{+} K^{-} π^{+} π^{-}$ channel. The amplitudes for the reaction are formulated within the nonperturbative tensor-pomeron approach. We consider separately the $f_{2}(1950)$ $s$-channel exchange mechanism and the $K^{*0}$ $t/u$-channel exchange mechanism, focusing on their specificities. First mechanism is a candidate for the central diffractive production of tensor glueball and the second one is an irreducible continuum. We adjust parameters of our model, assuming the dominance of pomeron-pomeron fusion, to the WA102 experimental data. We find that including the continuum contribution alone one can describe the WA102 data reasonably well. We present predictions for the reaction $pp \to pp (K^{*0} \bar{K}^{*0} \to K^{+} K^{-} π^{+} π^{-})$ for the ALICE, ATLAS, CMS and LHCb experiments including typical kinematical cuts. We find from our model a cross sections of $σ\cong 17-250$ nb for the LHC experiments, depending on the assumed cuts. Absorption effects are included in our analysis.

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