Measurement of the D
Phys Rev Lett
; 119(20): 202003, 2017 Nov 17.
Article
em En
| MEDLINE
| ID: mdl-29219353
ABSTRACT
We measure the mass difference, Δm_{+}, between the D^{*}(2010)^{+} and the D^{+} using the decay chain D^{*}(2010)^{+}âD^{+}π^{0} with D^{+}âK^{-}π^{+}π^{+}. The data were recorded with the BABAR detector at center-of-mass energies at and near the Ï(4S) resonance, and correspond to an integrated luminosity of approximately 468 fb^{-1}. We measure Δm_{+}=(140 601.0±6.8[stat]±12.9[syst]) keV. We combine this result with a previous BABAR measurement of Δm_{0}≡m(D^{*}(2010)^{+})-m(D^{0}) to obtain Δm_{D}=m(D^{+})-m(D^{0})=(4824.9±6.8[stat]±12.9[syst]) keV. These results are compatible with and approximately five times more precise than the Particle Data Group averages.
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MEDLINE
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En
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2017
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Article