Yerevan Physics Institute, Yerevan, Armenia.
Phys Rev Lett. 2012 Dec 21;109(25):251801. doi: 10.1103/PhysRevLett.109.251801.
We report an investigation of the invariant mass spectrum of the two jets with highest transverse momentum in pp → W+2-jet and W+3-jet events to look for resonant enhancement. The data sample corresponds to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector at sqrt[s] = 7 TeV. We find no evidence for the anomalous structure reported by the CDF Collaboration, and establish an upper limit of 5.0 pb at 95% confidence level on the production cross section for a generic Gaussian signal with mass near 150 GeV. Additionally, we exclude two theoretical models that predict a CDF-like dijet resonance near 150 GeV.
我们报告了对 pp→W+2-jet 和 W+3-jet 事件中具有最高横动量的两个喷注的不变质量谱的研究，以寻找共振增强。该数据样本对应于 CMS 探测器在 sqrt[s] = 7 TeV 下采集的 5.0 fb(-1)积分亮度。我们没有发现 CDF 合作组报告的异常结构的证据，并在 95%置信水平下对质量接近 150 GeV 的通用高斯信号的产生截面设定了 5.0 pb 的上限。此外，我们排除了两个预测在 150 GeV 附近存在 CDF 类似双喷注共振的理论模型。
