Speaker
Dr.
Valeri Tayursky
(Budker INP, Novosibirsk)
Description
The KEDR experiment is dedicated to a study of c- and b-quarks and the
two-photon physics at the $e^+ e^-$ collider VEPP-4M
in the Budker Institute of Nuclear Physics.
Since 2002 the KEDR detector has been collecting data in the
energy range 2E $\simeq 1.8\div4$ GeV.
The main collection of data for the study of $\gamma \gamma$ physics
is planned in the next few years, after increasing VEPP-4M energy.
The detector is equipped with a special system to tag
scattered electrons from $\gamma \gamma$ processes.
The system detects electrons corresponding to
small $Q_i^2$ of virtual photons. It
has a high detection efficiency and
good invariant $\gamma \gamma$ mass resolution.
To analyze the $2\gamma$ data and estimate contribution of two-photon
background events in the 1$ \gamma $ data samples, the event generators
$e^+e^- \to e^+e^- \mbox{ + }hadrons$,
$e^+e^- \to e^+e^- \mbox{ + } \pi^+ \pi^-$, and
$e^+e^- \to e^+e^- \mbox{ + }$PS have been developed.
The generator of pseudoscalar resonances production
$e^+ e^- \to e^+ e^- \mbox{ + }$PS has the option of
taking into account radiative corrections in the mode with
a single tagging.
Primary author
Dr.
Valeri Tayursky
(Budker INP, Novosibirsk)
