FLAVOR CHANGING Z DECAYS: A WINDOW TO ULTRAHEAVY QUARKS?

Ganapathi, V.; Weiler, Thomas J.; Laermann, E.; Schmitt, I.; Zerwas, Peter M.

doi:10.1103/PhysRevD.27.579

FLAVOR CHANGING Z DECAYS: A WINDOW TO ULTRAHEAVY QUARKS?

V. Ganapathi
(
- SLAC and
- UC, San Diego
)
,
Thomas J. Weiler
(
- SLAC and
- UC, San Diego
)
,
E. Laermann
(
- Aachen, Tech. Hochsch.
)
,
I. Schmitt
(
- SLAC
)
,
Peter M. Zerwas
(
- SLAC
)

Jul, 1982

28 pages

Published in:

Phys.Rev.D 27 (1983) 579

DOI:

10.1103/PhysRevD.27.579

Report number:

SLAC-PUB-2955

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Abstract: (APS)

We study flavor-changing Z decays into quarks, Z→Q+q¯, in the standard SU(2)×U(1) theory with sequential generations. Such decays occur in higher-order electroweak interactions, with a probability growing as the fourth power of the mass of the heaviest (virtual) quark mediating the transition. With the possible exception of Z→bs¯, these decay modes are generally very rare in the three-generation scheme. However, with four generations Z→b′b¯ is observable if the t′ mass is a few hundred GeV. Such decay modes could thus provide a glimpse of the ultraheavy-quark spectrum.

POSTULATED PARTICLE: Z0
GAUGE FIELD THEORY: SU(2) X U(1)
NEUTRAL CURRENT: FLAVOR CHANGING
INTERMEDIATE BOSON: DECAY WIDTH
DECAY WIDTH: INTERMEDIATE BOSON
heavy quark
FERMION: MASS
MASS: FERMION
MASS: UPPER LIMIT
UPPER LIMIT: MASS

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