Speaker
Thomas Nunnemann
(Munich)
Description
We report on searches for the production of scalar and vector leptoquarks in
$p\bar{p}$ collisions at the Tevatron collider, which are based on integrated
luminosities of up to 1\,fb$^{-1}$ collected with the D\O{} detector.
Leptoquarks, which are predicted by several extensions of the Standard Model,
are hypothetical particles carrying both lepton and
quark flavors. At hadron colliders they can either be pair-produced via the
strong interaction or a single leptoquark can be produced in association with a
lepton via the hypothesized leptoquark-lepton-quark coupling.
Searches for the pair-production of leptoquarks of all three generations have
been performed using the $LQ\overline{LQ}\rightarrow l^+l^-q\bar{q}$,
$\rightarrow l^\pm \nu q\bar{q}$, and $\rightarrow \nu\bar{\nu}q\bar{q}$
final states. A search for the single production of leptoquarks coupling to muons
is based on the decay channel $LQ\mu\rightarrow\mu q \mu$. Upper limits on
the production cross sections are given and are used to derive lower limits on
the leptoquark masses.
Author
Thomas Nunnemann
(Munich)
