D0 - anti-D0 mixing in the presence of isosinglet quarks

Branco, G.C.; Parada, P.A.; Rebelo, M.N.

doi:10.1103/PhysRevD.52.4217

D0 - anti-D0 mixing in the presence of isosinglet quarks

Jan, 1995

11 pages

Published in:

Phys.Rev.D 52 (1995) 4217-4222

e-Print:

hep-ph/9501347 [hep-ph]

DOI:

10.1103/PhysRevD.52.4217

Report number:

UWTHPH-1994-51,
CFIF-IST-4-94

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Abstract:

We analyse

\Delta C=2

transitions in the framework of a minimal extension of the Standard Model where either a

Q=2/3

or a

Q=-1/3

isosinglet quark is added to the standard quark spectrum. In the case of a

Q=2/3

isosinglet quark, it is shown that there is a significant region of parameter space where

D~0 - \bar D~0

mixing is sufficiently enhanced to be observed at the next round of experiments. On the contrary, in the case of a

Q=-1/3

isosinglet quark, it is pointed out that obtaining a substancial enhancement of

D~0 - \bar D~0

mixing, while complying with the experimental constraints on rare kaon decays, requires a contrived choice of parameters.

D0 anti-D0: mixing
electroweak interaction: model
model: electroweak interaction
top: postulated particle
isospin: 0
0: isospin
CKM matrix matrix
neutral current: flavor changing
electron positron: annihilation
annihilation: electron positron

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Figures(0)

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