Title

Measurement of masses and widths of excited charm mesons D2∗ and evidence for broad states

Document Type

Article

Publication Date

2004

Abstract

Using data from the FOCUS experiment we analyze the D+π− and D0π+ invariant mass distributions. We measure the D2∗0 mass MD2∗0=(2464.5±1.1±1.9)MeV/c2 and width ΓD2∗0=(38.7±5.3±2.9)MeV/c2, and the D2∗+ mass MD2∗+=(2467.6±1.5±0.76)MeV/c2 and width ΓD2∗+=(34.1±6.5±4.2)MeV/c2. We find evidence for broad structures over background in both the neutral and charged final state. If each is interpreted as evidence for a single L=1, jq=1/2 excited charm meson resonance, the masses and widths are M1/20=(2407±21±35)MeV/c2, Γ1/20=(240±55±59)MeV/c2, and M1/2+=(2403±14±35)MeV/c2, Γ1/2+=(283±24±34)MeV/c2, respectively.

Comments

Published as: Link, J. M., Yager, P. M., Anjos, J. C., Bediaga, I., Göbel, C., Machado, A. A., … Sheaff, M. (2004). Measurement of masses and widths of excited charm mesons D2∗ and evidence for broad states. Physics Letters B, 586(1–2), 11–20. https://doi.org/10.1016/j.physletb.2004.02.017

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