CERN LHC的挠发现势及其判别
Torsion Discovery Potential and Its Discrimination at CERN LHC
摘要：
挠率模型是一类著名的扩展量子引力模型。本文研究了LHC中挠率场与费米子相互作用的一些唯象结果。扭转场可以作为一种新的重态出现，其特征在于它的质量和与费米子的耦合。这些新的状态将形成一个共振，衰减成差费米子，正如标准模型的许多扩展所发生的那样，例如预测额外的中性规范玻色子存在的模型，通常称为$Z^\prime$。使用的双电子通道，我们评估的积分亮度需要一个$5σ$发现作为扭转质量的函数，对于不同的耦合值。我们还计算了区分所需的光度，具有95%C.L.，这两种可能的扭转性质。最后，我们表明，观察到的信号来自扭转场可以区分来自一个新的中性规范玻色子的信号，提供了足够的亮度。
英文摘要：
Torsion models constitute a well known class of extended quantum gravity models. In this paper we study some phenomenological consequences of a torsion field interacting with fermions at LHC. A torsion field could appear as a new heavy state characterized by its mass and couplings to fermions. These new states will form a resonance decaying into difermions, as occurs in many extensions of the Standard Model, such as models predicting the existence of additional neutral gauge bosons, usually named $Z^\prime$. Using the dielectron channel we evaluate the integrated luminosity needed for a $5σ$ discovery as a function of the torsion mass, for different coupling values. We also calculate the luminosity needed for discriminate, with 95% C.L., the two possible different torsion natures. Finally, we show that the observed signal coming from the torsion field could be distinguished from a signal coming from a new neutral gauge boson, provided there is enough luminosity.
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