Search for flavour-changing neutral current top-quark decays to $qZ$ in $pp$ collision data collected with the ATLAS detector at $\sqrt{s} =8$ TeV
search for the flavour-changing neutral-current decay?t→qZ?is presented. Data collected by the ATLAS detector during 2012 from proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of?s√=8?TeV, corresponding to an integrated luminosity of 20.3 fb?1, are analysed. Top-quark pair-production events with one top quark decaying through the?t→qZ?(q=u,c) channel and the other through the dominant Standard Model mode?t→bW?are considered as signal. Only the decays of the?Z?boson to charged leptons and leptonic?W?boson decays are used. No evidence for a signal is found and an observed (expected) upper limit on the?t→qZ?branching ratio of?7×10?4?(8×10?4) is set at the 95% confidence level.
search for the flavour-changing neutral-current decaytqZis presented. Data collected by the ATLAS detector during 2012 from proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy ofs=8TeV, corresponding to an integrated luminosity of 20.3 fb1, are analysed. Top-quark pair-production events with one top quark decaying through thetqZ(q=u,c) channel and the other through the dominant Standard Model modetbWare considered as signal. Only the decays of theZboson to charged leptons and leptonicWboson decays are used. No evidence for a signal is found and an observed (expected) upper limit on thetqZbranching ratio of7104(8104) is set at the 95% confidence level.
Aad, Georges and others
物理学
flavour-changingneutraltop-quarkcollisionATLAS detector
Aad, Georges and others.Search for flavour-changing neutral current top-quark decays to $qZ$ in $pp$ collision data collected with the ATLAS detector at $\sqrt{s} =8$ TeV[EB/OL].(2016-09-10)[2025-08-02].https://chinaxiv.org/abs/201609.00627.点此复制
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