Probing Ztt Couplings using Z boson polarization in ZZ production at hadron colliders

by Dr 斌 岩 (美国 Los Alamos National Laboratory)

Wednesday 15 Apr 2020, 13:30 → 14:30 Asia/Shanghai

ID：983 422 559 (腾讯会议)

腾讯会议（ID：983 422 559） 摘要：We propose to utilize the polarization information of the Z bosons in ZZ production, via the gluon-gluon fusion process gg→ZZ, to probe the Ztt gauge coupling. The contribution of longitudinally polarized Z bosons is sensitive to the axial-vector component (at) of the Ztt coupling. We demonstrate that the angular distribution of the charged lepton from Z boson decays serves well for measuring the polarization of Z bosons and the determination of at. We show that ZZ production via the gg→ZZ process complement to Ztt and tZj productions in measuring the Ztt coupling at hadron colliders.