arXiv 1107.58302011-07-28hep-ph

在LHC发现Drell-Yan过程

Discovery in Drell-Yan Processes at the LHC

Cheng-Wei Chiang, Neil D. Christensen, Gui-Jun Ding, Tao Han

备注：: 22 pages, 18 figures, 6 tables
DOI：: 10.1103/PhysRevD.85.015023

摘要：

我们研究了在大型强子对撞机上由一种新的玻色子共振介导的Drell-Yan过程。考虑了自旋为0、1和2的玻色子与标准模型费米子和胶子的最一般的首阶耦合，为将来探索其共振性质，如自旋、质量和耦合提供了一个与模型无关的公式。在中性共振的情况下，我们演示了如何改变的夸克和轻子的手征耦合的运动学分布的形状变化，并显示如何分析的耦合，利用向前向后的不对称性。在带电共振的情况下，我们提出了一种新的技术，以有效地重建角分布的质心框架，在很大程度上避免了双重的模糊性，由于丢失的中微子。类似于中性共振的情况，可以明确地提取共振的自旋信息，并且可以以统计方式探索手性耦合和不对称性。与目前的大型强子对撞机的数据，我们提出了新的共振的质量和截面倍分支分数的界限，并估计未来的范围。

英文摘要：

We study the Drell-Yan process mediated by a new bosonic resonance at the LHC. The bosons of spin-0, 1, and 2 with the most general leading-order couplings to Standard Model fermions and gluons are considered, which provide a model-independent formulation for future exploration of the resonance properties, such as its spin, mass and couplings. In the case of neutral resonances, we demonstrate how the shapes of the kinematical distributions change as one varies the chiral couplings of the quarks and leptons, and show how to analyze the couplings by making use of the forward-backward asymmetry. In the case of charged resonances, we propose a novel technique to effectively reconstruct the angular distribution in the center-of-mass frame, to a large extent avoiding the two-fold ambiguity due to the missing neutrino. Similar to the case of a neutral resonance, the spin information of the resonance can be extracted unambiguously, and chiral couplings and the asymmetries can be explored in a statistical manner. With the current LHC data, we present bounds on the mass and cross section times branching fraction of the new resonance and estimate the future reach.

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。

摘要：

英文摘要：

相关论文