论文标题
在大型强子对撞机处的DIGLUON共振的信号背景干扰
Signal-background interference for digluon resonances at the Large Hadron Collider
论文作者
论文摘要
我们研究了$ gg \ rightarrow x \ rightarrow gg $的振幅之间的干扰，其中$ x $是一种新的重型挖掘共鸣，而QCD背景$ GG \ rightarrow gg \ rightarrow gg $，在大型的Hadron Collider上。与天真的纯共振峰相比，该干扰产生了大型的低质量尾巴和在共振质量上方的事件不足。对于各种不同的谐振量子数和质量，我们评估了前进顺序的信号背景干扰贡献，包括淋浴，强调和检测器效应。产生的新物理二重质量分布可能具有在QCD背景拟合和减法之后出现的形状，类似于增强的峰，架子，峰/倾角，甚至是纯浸。我们认为，新的Digluon共振的真正限制可能与忽略干扰时获得的限制有显着差异，尤其是如果分支比率至$ GG $小于1时。
We study the interference between the amplitudes for $gg \rightarrow X \rightarrow gg$, where $X$ is a new heavy digluon resonance, and the QCD background $gg \rightarrow gg$, at the Large Hadron Collider. The interference produces a large low-mass tail and a deficit of events above the resonance mass, compared to the naive pure resonance peak. For a variety of different resonance quantum numbers and masses, we evaluate the signal-background interference contribution at leading order, including showering, hadronization, and detector effects. The resulting new physics dijet mass distribution may have a shape that appears, after QCD background fitting and subtraction, to resemble an enhanced peak, a shelf, a peak/dip, or even a pure dip. We argue that the true limits on new digluon resonances are likely to differ significantly from the limits obtained when interference is neglected, especially if the branching ratio to $gg$ is less than 1.
