A search for a narrow radial excitation of the \(\mathrm{D}^{*\pm}\) Meson

A sample of 3.73 million hadronic Z decays, recorded with the OPAL detector at LEP in the years 1991–95, has been used to search for a narrow resonance corresponding to the decay of the \(\mathrm{D}^{*\prime\pm}(2629)\) meson into \(\mathrm{D}^{*\pm}\mathrm{\pi}^{+}\mathrm{\pi}^{-}\). The \(\mathrm{D}^{*+}\) mesons are reconstructed in the decay channel \(\mathrm{D}^{*+} \to \mathrm{D}^{0} \mathrm{\pi}^{+}\) with \(\mathrm{D}^{0} \to \mathrm{K}^{-}\mathrm{\pi}^{+}\). No evidence for a narrow \(\mathrm{D}^{*\prime\pm}(2629)\) resonance is found. A limit on the production of narrow \(\mathrm{D}^{*\prime\pm}(2629)\) in hadronic Z decays is derived:

\[ f(\mathrm{Z} \to \mathrm{D}^{*\prime\pm}(2629)) \times Br(\mathrm{D}^{*\prime +} \to \mathrm{D}^{*+} \mathrm{\pi}^{+} \mathrm{\pi}^{-}) < 3.1 \times 10^{-3} \mathrm{(95\% C.L.)} \]

Authors and Affiliations

1. Dipartimento di Fisica dell' Università di Bologna and INFN, 40126 Bologna, Italy , , , , , , IT

   G. Abbiendi et al.

Consortia

Received: 16 January 2001 / Published online: 28 May 2001

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