标题： 在 sqrts = 1.96 TeV 的 ppbar 碰撞中，搜索反电荷双轻子和缺失能量末态中的希格斯玻色子产生，数据量为 9.7 fb-1 显示英文标题

标题： Search for Higgs boson production in oppositely charged dilepton and missing energy final states in 9.7 fb-1 of ppbar collisions at sqrts = 1.96 TeV

摘要： 我们对最终态包含两个反号轻子和大量缺失横向能量的希格斯玻色子进行了搜索，这与H->WW->lvlv衰变预期相符。 事件从费米实验室Tevatron对撞机在sqrt s = 1.96 TeV下用D0探测器收集的9.7 fb-1质子对撞数据样本中选出。 为了验证我们的搜索方法，我们测量了非共振WW产生截面，并发现sigma_WW = 11.6 +/- 0.7 pb，与标准模型预测一致。 在希格斯玻色子搜索中，未观察到超出背景预期的显著过量。 因此得出了希格斯玻色子产生截面在95%置信度下的上限。 在标准模型中，希格斯玻色子质量范围159 < MH < 176 GeV被排除，而预期的排除灵敏度为156 < MH < 172 GeV。 对于MH = 125 GeV的质量假设，我们排除了比标准模型预期大4.1倍的希格斯玻色子产生截面，这与该质量下存在希格斯玻色子相容。 在一个包含第四代费米子的理论框架中，质量范围125 < MH < 218 GeV被排除。 搜索结果还在费米子无耦合希格斯玻色子耦合的背景下进行解释，这导致了对于MH = 125 GeV的费米子无耦合希格斯玻色子产生截面比预期大3.1倍的排除。 显示英文摘要

摘要： We present a search for Higgs boson in final states with two oppositely charged leptons and large missing transverse energy as expected in H -> WW -> lvlv decays. The events are selected from the full Run II data sample of 9.7 fb-1 of ppbar collisions collected with the D0 detector at the Fermilab Tevatron Collider at sqrt s = 1.96 TeV. To validate our search methodology, we measure the non-resonant W W production cross section and find sigma_WW = 11.6 +/- 0.7 pb, in agreement with the standard model prediction. In the Higgs boson search, no significant excess above the background expectation is observed. Upper limits at the 95% confidence level on the Higgs boson production cross section are therefore derived. Within the standard model, the Higgs boson mass range 159 < MH < 176 GeV is excluded while the expected exclusion sensitivity is 156 < MH < 172 GeV. For a mass hypothesis of MH = 125 GeV, we exclude Higgs boson production cross sections 4.1 times larger than the standard model expectation, which is compatible with the presence of a Higgs boson at this mass. Within a theoretical framework with a fourth generation of fermions, the mass range 125 < MH < 218 GeV is excluded. The search results are also interpreted in the context of fermiophobic Higgs boson couplings, which yields an exclusion of fermiophobic Higgs boson production cross sections 3.1 times larger than the expectation for MH = 125 GeV.