Precision measurement of the Ds*+-Ds+ mass difference.

Brown, Fast, McIlwain, Miao, Miller,Modesitt, Payne,Shibata, Shipsey, Wang, Battle,Ernst, Kwon, Roberts, Thorndike, Wang, Dominick, Lambrecht, Sanghera, Shelkov, Skwarnicki, Stroynowski, Volobouev, Wei, Zadorozhny, Artuso,Goldberg, He, Horwitz, Kennett, Mountain, Moneti, Muheim, Mukhin,Playfer, Rozen, Stone, Thulasidas, Vasseur, Zhu, Bartelt, Csorna, Egyed, Jain, Kinoshita,Edwards, Ogg, Britton, Hyatt, MacFarlane, Patel, Akerib, Barish, Chadha, Chan, Cowen, Eigen, Miller,O'Grady, Urheim, Weinstein, Acosta, Athanas, Masek

PHYSICAL REVIEW D（1994）

Cited 4|Views78

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Abstract

We have measured the vector-pseudoscalar mass splitting M(D(s)*+) - M(D(s)+) = 144.22 +/- 0.47 +/- 0.37 MeV significantly more precisely than the previous world average. We minimize the systematic errors by also measuring the vector-pseudoscalar mass difference M(D*0) - M(D0) using the radiative decay D*0 --> D0gamma, obtaining [M(D(s)*+) - M(D(s)+)] - [M(D*0) - M(D0)] = 2.09 +/- 0.47 +/- 0.37 MeV. This is then combined with our previous high-precision measurement of M(D*0) - M(D0), which used the decay D*0 --> D0pi0. We also measure the mass difference M(D(s)+) - M(D+) = 99.5 +/- 0.6 +/- 0.3 MeV, using the phipi+ decay modes of the D(s)+ and D+ mesons.

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Key words

systematic error

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