Hadronic decays ofχbJinto light bottom squarks

Abstract

We calculate the rates for inclusive hadronic decay of the three bJ states into a pair of light bottom squarks as a function of the masses of the bottom squark and the gluino. We include color-singlet and color-octet configurations. The color-octet contribution is found to be insignificant for the b0 but can dominate in the b2 case if current lattice estimates are used for the color-octet matrix element. In comparison with the standard model values, bottom squark decays can increase the predicted hadronic width of the b0 by as much as 33%, for very small bottom squark masses and gluino masses in the range of 12 GeV, but make a small contribution in the cases of b1 and b2 . Data from decays of the bJ states could provide significant new bounds on the existence and masses of supersymmetric particles.

Light gluino and the running ofαs

“…One must then take account of these changes when extracting α s from χ bJ data, but their impact on the determination mentioned above is relatively modest [24].…”

Light bottom squark phenomenology

“…In this paper, I summarize the proposal in Ref. [3] of light gluinos g and light bottom squarks b, as well as subsequent work [4,5,6,7,8]. In this scenario the b is the lightest supersymmetric (SUSY) particle, and the masses of all other SUSY particles are arbitrarily heavy, i.e., of order the electroweak scale or greater.…”

“…[4] as a function of the masses of the b and the g, and χ bJ decays are treated in Ref. [6]. The data sample is largest at the Υ(4S).…”

Impact of CP phases on a light sbottom and gluino sector

“…decaying to a pair of light bottom squarks [6], radiative B meson decays [7], the decays Z → bb * 1g +bb 1g followed byg → bb * 1 /bb 1 and e + e − → qqgg [8], as well as the running of strong coupling constant α s [9].…”