MASS LIMITS for Color Octet Charged Leptons (${{\mathit \ell}_{{{8}}}}$) INSPIRE search

$\lambda $ ${}\equiv$ ${\mathit m}_{{{\mathit \ell}_{{{8}}}}}/{{\mathit \Lambda}}$

S054CL

VALUE (GeV)

CL%

DOCUMENT ID

TECN

COMMENT

$\bf{>86}$

ABE

1989

CDF

Stable ${{\mathit \ell}_{{{8}}}}$: ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit \ell}_{{{8}}}}{{\overline{\mathit \ell}}_{{{8}}}}$

• • • We do not use the following data for averages, fits, limits, etc. • • •

ABT

1993

${{\mathit e}_{{{8}}}}$: ${{\mathit e}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit e}_{{{8}}}}$ X

¹ ABE 1989D look for pair production of unit-charged particles which leave the detector before decaying. In the above limit the color octet lepton is assumed to fragment into a unit-charged or neutral hadron with equal probability and to have long enough lifetime not to decay within the detector. The limit improves to 99 GeV if it always fragments into a unit-charged hadron.

² ABT 1993 search for ${{\mathit e}_{{{8}}}}$ production via ${{\mathit e}}$-gluon fusion in ${{\mathit e}}{{\mathit p}}$ collisions with ${{\mathit e}_{{{8}}}}$ $\rightarrow$ ${{\mathit e}}{{\mathit g}}$. See their Fig.$~$3 for exclusion plot in the ${\mathit m}_{{{\mathit e}_{{{8}}}}}--\Lambda $ plane for ${\mathit m}_{{{\mathit e}_{{{8}}}}}$ = $35 - 220$ GeV.

References:

ABT

1993

NP B396 3

A Search for Leptoquarks, Leptogluons and Excited Leptons in H1 at HERA

ABE

1989D

PRL 63 1447

Search for Heavy Stable Charged Particles in 1.8 TeV ${{\overline{\mathit p}}}$ ${{\mathit p}}$ Collisions at the Fermilab Collider