====== TTP13-039 Implications of an R-Scan for Charm Physics ======
 
 
<hidden TTP13-039  Implications of an R-Scan for Charm Physics > The impact of improved measurements of the cross section for 
electron-positron annihilation into hadrons in the charm threshold
region is discussed. Two aspects are studied in detail:
i.)~A significant reduction of the experimental error of the electronic
width of the narrow resonances $J/\psi$ and $\psi'$ and of the
continuum cross section from the open charm threshold up to 4.6~GeV
will lead to a correspondingly improved determination of the charmed quark
mass. ii)~A high luminosity measurement with 24~pb${}^{-1}$ at three
points and with a spacing of 2~MeV around $\sqrt{s}=3511\,{\rm MeV}$ may
allow to observe the direct, resonant production of $\chi_{c1}$. </hidden>
|**Kühn, Johann H.**  | 
| {{preprints:2013:ttp13-039.pdf|PDF}} {{preprints:2013:ttp13-039.ps|PostScript}}   |
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