29 May 2018 to 3 June 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Precise Measurement of the $D^\star(2010)^+ - D^+$ Mass Difference

29 May 2018, 17:00
20m
North Foyer | Joshua Tree Room (Hyatt Regency Indian Wells Conference Center)

North Foyer | Joshua Tree Room

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA

Speaker

Prof. Abner Soffer (Tel Aviv University)

Description

We measure the mass difference, $\Delta m_+$, between the $D^\star (2010)^+$ and the $D^+$, using the decay chain $D^\star (2010)^+\to D^+ \pi^0$ with $D^+\to K^- \pi^+ \pi^+$. The data were recorded with the BaBar detector at center-of-mass energies at and near the $\Upsilon$(4S) resonance, and correspond to an integrated luminosity of approximately 468 fb$^{-1}$. We measure $\Delta m_+ = (140,601.0 \pm 6.8 \,[\mathrm{stat}] \pm 12.9 \, [\mathrm{syst}])$ keV. We combine this result with a previous BaBar measurement of $\Delta m_0\equiv m(D^\star(2010)^+) - m (D^0)$ to obtain $\Delta m_D = m(D^+) - m(D^0) = (4,824.9 \pm 6.8\,[\mathrm{stat}] \pm 12.9\,[\mathrm{syst}])$ keV. These results are compatible with, and approximately five times more precise than, previous world averages.
E-mail [email protected]
Collaboration name BaBar

Primary author

Prof. Abner Soffer (Tel Aviv University)

Presentation materials