arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1303.3276hep-ex
收藏

用D0探测器搜索9.7 fb-1 ppbar碰撞中的ZH -> l+l- bbar产生

Search for ZH -> l+l- bbar production in 9.7 fb-1 of ppbar collisions with the D0 detector

D0 Collaboration

摘要:

我们提出了一个搜索的标准模型(SM)希格斯玻色子玻色子与Z玻色子在9.7 fb-1的ppbar碰撞收集在费米实验室的Tevatron对撞机在sqrt{s} = 1.96 TeV的D 0探测器。选定的事件包含一个重建的Z -> e+e-或Z -> mu+mu-候选者和至少两个喷流,包括至少一个可能包含b夸克的喷流。为了验证搜索过程,我们还测量了ZZ生产的截面,发现它与SM期望一致。我们将上限设定在95% C. L。对质量为90 <= M_H <= 150 GeV的希格斯玻色子,ZH产生截面与分支比B(H -> bbbar)的乘积进行了计算。对M_H = 125 GeV的观测(预期)极限比SM预测大7.1(5.1)倍。

英文摘要:

We present a search for the standard model (SM) Higgs boson produced in association with a Z boson in 9.7 fb-1 of ppbar collisions collected with the D0 detector at the Fermilab Tevatron Collider at sqrt{s} = 1.96 TeV. Selected events contain one reconstructed Z -> e+e- or Z -> mu+mu- candidate and at least two jets, including at least one jet likely to contain a b quark. To validate the search procedure, we also measure the cross section for ZZ production, and find that it is consistent with the SM expectation. We set upper limits at the 95% C.L. on the product of the ZH production cross section and branching ratio B(H -> bbbar) for Higgs boson masses 90 <= M_H <= 150 GeV. The observed (expected) limit for M_H = 125 GeV is a factor of 7.1 (5.1) larger than the SM prediction.

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。

↑