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

Our aim is to test a model recently presented, motivated by the reported$R_b$ and $R_c$ ``crisis", which contains extra vector fermions. We suggest analternative indirect test of the possible existence of new heavy quark flavoursat the LEP2 collider, which turns out to give the clearest signal. We calculate$q\bar{q}$ cross sections within this framework, including one loopcorrections, and find measurable differences compared to the Standard Modelpredictions.Comment: 12 pages, LaTeX source file, 3 figures, uses epsf.st

Testing a Model with Additional Vector Fermions at the LEP2 Collider