# ${{\boldsymbol D}_{{1}}{(2420)}^{\pm}}$ MASS INSPIRE search

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 2423.2 \pm2.4}$ OUR AVERAGE  Error includes scale factor of 1.5.
$2421.9$ $\pm4.7$ ${}^{+3.4}_{-1.2}$ 759 1
 2013
ZEUS ${{\mathit e}^{\pm}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit D}^{(*)0}}{{\mathit \pi}^{+}}{{\mathit X}}$
$2421$ $\pm2$ $\pm1$ 124
 2005 A
BELL ${{\overline{\mathit B}}^{0}}$ $\rightarrow$ ${{\mathit D}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$
$2425$ $\pm2$ $\pm2$ 146
 1994 B
CLE2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{*0}}{{\mathit \pi}^{+}}$ X
$2443$ $\pm7$ $\pm5$ 190
 1989 C
TPS ${{\mathit \gamma}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\mathit \pi}^{+}}{{\mathit X}^{0}}$
1  From the fit of the ${{\mathit M}}$( ${{\mathit D}^{0}}{{\mathit \pi}^{+}}$ ) distribution. The widths of the ${{\mathit D}_{{1}}^{+}}$ and ${{\mathit D}_{{2}}^{*+}}$ are fixed to 25 MeV and 37 MeV, and A$_{{{\mathit D}_{{1}}}}$ and A$_{{{\mathit D}_{{2}}}}$ are fixed to the theoretical predictions of 3 and $-1$, respectively.

${{\mathit D}_{{1}}{(2420)}^{\pm}}$ MASS (MeV)
References:
 ABRAMOWICZ 2013
NP B866 229 Production of the Excited Charm Mesons ${{\mathit D}_{{1}}}$ and ${{\mathit D}_{{2}}^{*}}$ at HERA
 ABE 2005A
PRL 94 221805 Observation of the ${{\mathit D}_{{1}}{(2420)}}$ $\rightarrow$ ${{\mathit D}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Decays
 BERGFELD 1994B
PL B340 194 Observation of ${{\mathit D}_{{1}}{(2420)}^{+}}$ and ${{\mathit D}_{{2}}^{*}{(2460)}^{+}}$
 ANJOS 1989C
PRL 62 1717 Observation of Excited Charmed Mesons