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arXiv 1008.4469hep-phnucl-th
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质子-质子和质子-反质子碰撞中π + π-对的排他性产生

Exclusive production of pi+ pi- pairs in proton-proton and proton-antiproton collisions

Piotr Lebiedowicz, Antoni Szczurek

备注：
3 pages, 2 figures, talk given at MESON2010 conference, Krakow, Poland, 10-15 June 2010
发表信息：
Int.J.Mod.Phys.A26:748-750,2011
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摘要：

我们报告的详细调查四体$p p \to p p π^+ π^-$和$p \bar{p} \to p \bar{p} π^+ π^-$）的反应，构成了一个不可约的背景，以三体过程$p p \to p p M$，其中$M$是一个广泛的共振在$π^+ π^-$通道，例如$M=σ, ρ^{0}, f_{0}(980), f_{2}(1275), f_{0}(1500)$。我们包括双衍射的贡献（包括坡密子和reggeon交换），以及π介子-π介子再散射的贡献。第一个过程占主导地位，在较高的能量和小的π-π不变质量，而第二个变得重要，在较低的能量和较高的π-π不变质量。我们比较我们的结果与实验数据。我们预测未来的实验在PANDA，RHIC，Tevatron和LHC能源。π介子$(y_{π^+}, y_{π^-})$在快度空间中的二维分布特别有趣。入射能量越高，π介子在同一半球发射的优先性越高。所考虑的过程对核子-核子总截面和π介子包含的截面有相当大的贡献。

英文摘要：

We report on a detailed investigation of four-body $p p \to p p π^+ π^-$ and $p \bar{p} \to p \bar{p} π^+ π^-$) reactions which constitute an irreducible background to three-body processes $p p \to p p M$, where $M$ is a broad resonance in the $π^+ π^-$ channel, e.g. $M=σ, ρ^{0}, f_{0}(980), f_{2}(1275), f_{0}(1500)$. We include double-diffractive contribution (both pomeron and reggeon exchanges) as well as the pion-pion rescattering contributions. The first process dominates at higher energies and small pion-pion invariant masses while the second becomes important at lower energies and higher pion-pion invariant masses. We compare our results with the experimental data. We make predictions for future experiments at PANDA, RHIC, Tevatron and LHC energies. The two-dimensional distribution in rapidity space of pions $(y_{π^+}, y_{π^-})$ is particularly interesting. The higher the incident energy, the higher preference for the same-hemisphere emission of pions. The processes considered constitute a sizeable contribution to the total nucleon-nucleon cross section as well as to pion inclusive cross section.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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