This posts shows code examples of Feynman diagrams of four top quark production in proton-proton collisions, as well ass ttbar plus bbbar production. For a nice overview from the experimental point of view, have a look at this review article by the CMS collaboration, published in Physics Reports.

[miniblock post=”ttbarqqbar” width=”130″ dir=”wp-content/uploads/2024/12″]

From two gluons

Gluon fusion, s-channel: [feyn wppath=”2024/12/ttbarqqbar-001″] [feyn wppath=”2024/12/ttbarqqbar-002″] Quark-antiquark annihilation, s-channel: [feyn wppath=”2024/12/ttbarqqbar-003″] [feyn wppath=”2024/12/ttbarqqbar-004″] Gluon fusion, t-channel: [feyn wppath=”2024/12/ttbarqqbar-005″] [feyn wppath=”2024/12/ttbarqqbar-006″] Quark-antiquark annihilation, t-channel: [feyn wppath=”2024/12/ttbarqqbar-007″] [feyn wppath=”2024/12/ttbarqqbar-008″]

Associated production with s-channel

Associated production, with gluon s-channel: [feyn wppath=”2024/12/ttbarqqbar-009″] [feyn wppath=”2024/12/ttbarqqbar-010″] [feyn wppath=”2024/12/ttbarqqbar-011″] Associated production, with γ*/Z s-channel: [feyn wppath=”2024/12/ttbarqqbar-012″] [feyn wppath=”2024/12/ttbarqqbar-013″] [feyn wppath=”2024/12/ttbarqqbar-014″] Associated production, with Higgs s-channel: [feyn wppath=”2024/12/ttbarqqbar-015″] [feyn wppath=”2024/12/ttbarqqbar-016″] [feyn wppath=”2024/12/ttbarqqbar-017″]

Associated production with t-channel

Associated production, with gluon s-channel: [feyn wppath=”2024/12/ttbarqqbar-018″] [feyn wppath=”2024/12/ttbarqqbar-019″] Associated production, with a t-channel Z boson: [feyn wppath=”2024/12/ttbarqqbar-020″] [feyn wppath=”2024/12/ttbarqqbar-021″] Associated production, with a t-channel W boson: [feyn wppath=”2024/12/ttbarqqbar-022″]

[tex file=”wp-content/uploads/2024/12/ttbarqqbar.tex”] [links base=”wp-content/uploads/2024/12/ttbarqqbar”] [seealso posts=”ttbar,ttbarccbar_jet,ttbarV,singletop,higgs_pp,higgs_pair_pp”]

See also: Original Source

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