学術雑誌論文 Searches for the Z gamma decay mode of the Higgs boson and for new high-mass resonances in pp collisions at root s=13 TeV with the ATLAS detector

The ATLAS collaboration  ,  Hara, K.  ,  Kim , S.H.  ,  Okawa, H.  ,  Sato, K.  ,  Ukegawa , F.

2017 ( 10 )  , p.112 , 2017-10 , Springer
ISSN:1029-8479
NII書誌ID(NCID):AA1188279X
内容記述
This article presents searches for the Zγ decay of the Higgs boson and for narrow high-mass resonances decaying to Zγ, exploiting Z boson decays to pairs of electrons or muons. The data analysis uses 36.1 fb−1 of pp collisions at s√=13 recorded by the ATLAS detector at the CERN Large Hadron Collider. The data are found to be consistent with the expected Standard Model background. The observed (expected — assuming Standard Model pp → H → Zγ production and decay) upper limit on the production cross section times the branching ratio for pp → H → Zγ is 6.6. (5.2) times the Standard Model prediction at the 95% confidence level for a Higgs boson mass of 125.09 GeV. In addition, upper limits are set on the production cross section times the branching ratio as a function of the mass of a narrow resonance between 250 GeV and 2.4 TeV, assuming spin-0 resonances produced via gluon-gluon fusion, and spin-2 resonances produced via gluon-gluon or quark-antiquark initial states. For high-mass spin-0 resonances, the observed (expected) limits vary between 88 fb (61 fb) and 2.8 fb (2.7 fb) for the mass range from 250 GeV to 2.4 TeV at the 95% confidence level.
本文を読む

https://tsukuba.repo.nii.ac.jp/?action=repository_action_common_download&item_id=44246&item_no=1&attribute_id=17&file_no=1

このアイテムのアクセス数:  回

その他の情報