Boosted Higgs in Atlas
The ATLAS collaboration2, Yun-Ju Lu1*
1Physics, National Tsing Hua University, Hsinchu, Taiwan
2The ATLAS collaboration, cern, geneva, Switzerland
* Presenter:Yun-Ju Lu,
With more boosted Higgs produced in Run 2 of the Large Hadron Collider, many physics searches use the channel where boosted Higgs decay to two b-quarks. The base line subjet b tagging method with subjet reconstructed from fixed radius trackjet has applied to the analysis with boosted Higgs in ATLAS. Besides the baseline analysis, three new subjet reconstruction methods, variable radius trackjets, exclusive kt calorimeter subjets, and calorimeter subjets reconstructed in the centre of mass frame of the Higgs jet are studied. For Higgs jets with large transverse momenta (>1 TeV), these three new techniques show significantly improvements compared to the performance from fixed radius trackjets.

Keywords: boosted Higgs, ATLAS, Large Hadron Collider, btagging, subjet