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arXiv 0803.0813hep-ph
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高能量下来自$ug\to \tilde d \tchi_i^+$和$ug \to d W^+$的纯正SUSY签名

Genuine SUSY signatures from $ug\to \tilde d \tchi_i^+$ and $ug \to d W^+$, at high energies

G. J. Gounaris, J. Layssac, F. M. Renard

摘要:

在最小超对称模型(MSSM)中分析了夸克-胶子诱导过程$u g\to \tilde d\tchi_i^+$,包括单圈电弱(EW)效应。这个过程是由四个螺旋度振幅决定的,其中三个是违反螺旋度守恒的,另一个是遵守它,并在高能量下被增强。结合此$u g\to \tilde d\tchi_i^+$分析与相应的一个$u g \to d W^+$,我们得到简单的近似关系,这两个过程之间,测试MSSM结构的振幅和截面水平。这些关系在渐近能量下变得精确,如果超对称尺度不太重,它们在LHC能量下也可能近似正确。除此之外,我们还研究了LHC上包含的$\tilde d\tchi_i^+$产生的1圈EW修正,并以$p_T$和角分布为例。将这些结果与先前推导的$W$ +喷流产生的相应预测进行比较,提供了对超对称分配的精确检验。

英文摘要:

We analyze the quark-gluon induced process $u g\to \tilde d\tchi_i^+$, including the one loop electroweak (EW) effects in the minimal supersymmetric model (MSSM). This process is determined by four helicity amplitudes, three of which are violating helicity conservation, and another one which respects it and is logarithmically enhanced at high energy. Combining this $u g\to \tilde d\tchi_i^+$ analysis with a corresponding one for $u g \to d W^+$, we obtain simple approximate relations between the two processes, testing the MSSM structure at the amplitude and the cross section levels. These relations become exact at asymptotic energies and, provided the SUSY scale is not too heavy, they may be approximately correct at LHC energies also. In addition to these, we study the 1loop EW corrections to the inclusive $\tilde d\tchi_i^+$ production at LHC, presenting as examples, the $p_T$ and angular distributions. Comparing these to the corresponding predictions for $W$+jet production derived earlier, provides an accurate test of the supersymmetric assignments.

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