Production of neutral technicolor pseudo Goldstone bosons and QCD background at the Superconducting Super Collider.

Abstract

The production of the neutral technicolor pseudo Goldstone bosons ${\mathrm{P}}^{0\ensuremath{'}}$ and ${\mathrm{P}}_{8}^{0\ensuremath{'}}$ at large transverse momentum in pp\ifmmode\bar\else\textasciimacron\fi{} collisions, pp\ifmmode\bar\else\textasciimacron\fi{}\ensuremath{\rightarrow}g(q)${\mathrm{P}}^{0\ensuremath{'}}$(${\mathrm{P}}_{8}^{0\ensuremath{'}}$)X, has been investigated at the Superconducting Super Collider (SSC) energy. The major two-body and three-body decay modes in tree diagrams are also investigated in detail. The tt\ifmmode\bar\else\textasciimacron\fi{} decay channel would dominate the decays of both ${\mathrm{P}}^{0\ensuremath{'}}$ and ${\mathrm{P}}_{8}^{0\ensuremath{'}}$ if it is allowed. Otherwise, gg and 3g will be the dominant decay modes unless the mass of the ${\mathrm{P}}^{0\ensuremath{'}}$ and ${\mathrm{P}}_{8}^{0\ensuremath{'}}$ are below 40 GeV, where bb\ifmmode\bar\else\textasciimacron\fi{} becomes dominant. The tt\ifmmode\bar\else\textasciimacron\fi{} channel will be the ideal signal for detecting these bosons since the signal is much larger than the QCD background. However, in the absence of the tt\ifmmode\bar\else\textasciimacron\fi{} channel, the \ensuremath{\tau}\ensuremath{\tau}\ifmmode\bar\else\textasciimacron\fi{} mode can be used to identify ${\mathrm{P}}^{0\ensuremath{'}}$ up to ${\mathrm{m}}_{\mathrm{P}}$=300 GeV in the transverse-momentum range ${\mathrm{P}}_{\mathrm{\ensuremath{\perp}}}$\ensuremath{\lesssim}100 GeV. Similarly, the bb\ifmmode\bar\else\textasciimacron\fi{} decay mode can serve as a useful signal for the identification of ${\mathrm{P}}_{8}^{0\ensuremath{'}}$ up to ${\mathrm{m}}_{\mathrm{P}}$=300 GeV for ${\mathrm{P}}_{\mathrm{\ensuremath{\perp}}}$ between 500 and 700 GeV. Our results show that these high-transverse-momentum production processes are useful in searching for the ${\mathrm{P}}^{0\ensuremath{'}}$ and ${\mathrm{P}}_{8}^{0\ensuremath{'}}$ at the SSC.