在sqrt（s）= 1.96 TeV的p-barp碰撞中寻找ZZ和Zγ^* 的产生以及对反常ZZZ和ZZγ^* 耦合的限制
Search for ZZ and Zγ^* production in p-barp collisions at sqrt(s) = 1.96 TeV and limits on anomalous ZZZ and ZZγ^* couplings
摘要：
我们利用费米实验室Tevatron p-barp对撞机D 0探测器在sqrt（s）= 1.96 TeV下收集的1 fb^（-1）的数据，对4 μ子、4电子和2 μ子2电子事件进行了研究。假设轻子对的质量大于30 GeV，我们观测到一个事件，与预期的0.13 +-0.03个事件的背景和预测的标准模型ZZ和Zγ^* 产生的1.71 +-0.15个事件相一致。我们将95% C. L时ZZ和Zγ^* 截面的上限设定为4.4 pb。我们还导出了反常中性三线性ZZZ和ZZγ^* 规范耦合的极限。单参数95%$C. L.形状因子标度λ = 1.2 TeV时，耦合极限分别为-0.28 < f_（40）^Z < 0.28，-0.31 < f_（50）^Z < 0.29，-0.26 < f_（40）^γ< 0.26，-0.30 < f_（50）^γ< 0.28。
英文摘要：
We present a study of four muon, four electron, and two muon two electron events using 1 fb^(-1) of data collected with the D0 detector at the Fermilab Tevatron p-barp Collider at sqrt(s) = 1.96 TeV. Requiring the lepton pair masses to be greater than 30 GeV, we observe one event, consistent with the expected background of 0.13 +- 0.03 events and with the predicted standard model ZZ and Zγ^* production of 1.71 +-0.15 events. We set an upper limit on the ZZ and Zγ^* cross section of 4.4 pb at the 95% C.L. We also derive limits on anomalous neutral trilinear ZZZ and ZZγ^* gauge couplings. The one-parameter 95%$ C.L. coupling limits with a form factor scale Lambda = 1.2 TeV are -0.28 < f_(40)^Z < 0.28, -0.31 < f_(50)^Z < 0.29, -0.26 < f_(40)^γ< 0.26, and -0.30 < f_(5 0)^γ< 0.28.
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。
