English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The one-loop induced top quark decay $t\to u_1\bar{u}_2u_2$ ($u_i=u,c$) iscalculated in the context of the standard model. The dominant contribution tothis top quark decay arises from the Feynman diagrams induced by the off-shell$tu_1g^*$ vertex, whereas the box diagrams are negligibly small. In contrastwith the on-shell $tu_1g$ vertex, which only gives rise to a pure dipolareffect, the off-shell $tu_1g^*$ coupling also involves a monopolar term, whichgives a larger contribution than the dipolar one. It is found that thebranching ratio for the three-body decay $t\to u_1\bar{u}_2u_2$ is about of thesame order of magnitude of the two-body decay $t\to u_1 g$, the latter beingslightly larger, which stems from the fact that the three-body decay isdominated by a monopolar term.Comment: 8 pages, 3 figures, branching ratio is evaluated using the running  quark masses at the top quark mass scale, results and conclusion changes  slightly, new results agree with those presented in hep-ph/0601151, missing  references are adde

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Rare top quark decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>t</mml:mi><mml:mo>→</mml:mo><mml:msub><mml:mi>u</mml:mi><mml:mn>1</mml:mn></mml:msub><mml:msub><mml:mover accent="true"><mml:mi>u</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>u</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>in the standard model

Rare top quark decayt→u1u¯2u2in the standard model