Speaker
Prof.
Chung Kao
(University of Oklahoma)
Description
One of the main channels which allows for a large rate of neutralino
dark matter annihilation in the early Universe is via the
Higgs pseudoscalar $A$-resonance.
In this case, the measured dark matter abundance can
be obtained in the minimal supergravity (mSUGRA) model when
$\tan\beta\sim 50$ and $2m_{\chi_1}\sim m_A$.
We investigate the reaction $pp\to b\phi\to b\mu^+\mu^- +X$
(where $\phi =A$ or $H$).
The rare but observable Higgs decay to muon pairs allows for
a precise measurement of the Higgs boson mass and decay width.
We find that $\Gamma_A$ can typically be determined to
$\sim 8\%$ ($\sim 17\%$) for $m_A\sim 400$ (600) GeV
and $10^3$ fb$^{-1}$ of integrated luminosity.
In the case where a dilepton mass edge
from $\chi_2\to\ell^+\ell^- \chi_1$ is visible, it should be possible to
test the relation that $2m_{\chi_1}\sim m_A$.
Primary author
Prof.
Chung Kao
(University of Oklahoma)
