Some tests for the helicity structure of the Pomeron in ep collisions
Some tests for the helicity structure of the Pomeron in ep collisions
复制标题
EP碰撞中Pomeron螺旋结构的一些测试
DOI：
10.1007/s002880050430
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
P. Landshoff
中科院分区：
文献类型：
--
作者：
T. Arens;O. Nachtmann;M. Diehl;P. Landshoff
本文在单光子交换近似下讨论了反应ep →epp <$X，其实质是反应γ*p→p <$X。在质子残余pJ的粒子和X的粒子之间需要一个大的快度间隙。我们定义了轻子平面和强子平面之间的一个合适的方位角。给出了反应截面对的依赖关系，并可用于提取反应γ*p→p <$X对应于虚光子γ* 不同螺旋度的截面和干涉项。干涉项可以灵敏地用于检验大快度间隙事件的模型。我们详细讨论了因式分解Pomeron交换模型，特别是Donnachie-Landshoff Pomeron模型.我们对软色交换模型和QCD背景真空场的可能影响作了一些评论。最后，我们建议在γ*p→，p <$π 0和γ * p →p <$η等深非弹性高能反应中寻找Odderon交换.
We discuss the reactionep→epp˜Xin the onephoton exchange approximation, where it is in essence the reaction γ*p→p˜X. A large rapidity gap is required between the particle or particles of the proton remnant pJ and those of X. We define a suitable azimuthal angle between a leptonic and a hadronic plane. The dependence of the cross section on is given explicitly and can be used to extract cross sections and interference terms for the reactionγ*p→p˜Xcorresponding to the various helicities of the virtual photon γ*. The interference terms can be used to test models for the large rapidity gap events in a sensitive way. We discuss in detail models with factorizing Pomeron exchange and in particular the Donnachie- Landshoff Pomeron model. We make some remarks on soft colour exchange models and on possible effects of QCD background vacuum fields. We conclude with a suggestion to look for Odderon exchange in exclusive deep inelastic high energy reactions like γ*p→,p˜π0and ğp→p˜η.