${{\mathit D}_{{{1}}}{(2420)}}$ MASS

INSPIRE   PDGID:
M253M
The fit includes ${{\mathit D}^{\pm}}$, ${{\mathit D}^{0}}$, ${{\mathit D}_{{{s}}}^{\pm}}$, ${{\mathit D}^{*\pm}}$, ${{\mathit D}^{*0}}$, ${{\mathit D}_{{{s}}}^{*\pm}}$, ${{\mathit D}_{{{1}}}{(2420)}^{0}}$, ${{\mathit D}_{{{2}}}^{*}{(2460)}^{0}}$, and ${{\mathit D}_{{{s1}}}{(2536)}^{\pm}}$ mass and mass difference measurements.
VALUE (MeV) EVTS DOCUMENT ID TECN CHG  COMMENT
$\bf{ 2422.1 \pm0.6}$ OUR FIT  Error includes scale factor of 1.7.
$\bf{ 2422.1 \pm0.8}$ OUR AVERAGE  Error includes scale factor of 2.1.  See the ideogram below.
$2424.8$ $\pm0.1$ $\pm0.7$ 79k 1
AAIJ
2020D
 LHCB 0 ${{\mathit B}^{-}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$
$2427.2$ $\pm1.0$ $\pm1.2$ 4207
ABLIKIM
2020P
 BES3 + ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{+}}{{\mathit D}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$2419.6$ $\pm0.1$ $\pm0.7$ 210k
AAIJ
2013CC
 LHCB 0 ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}{{\mathit X}}$
$2423.1$ $\pm1.5$ ${}^{+0.4}_{-1.0}$ 2.7k 2
ABRAMOWICZ
2013
ZEUS 0 ${{\mathit e}^{\pm}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit D}^{(*)+}}{{\mathit \pi}^{-}}{{\mathit X}}$
$2421.9$ $\pm4.7$ ${}^{+3.4}_{-1.2}$ 759 3
ABRAMOWICZ
2013
ZEUS + ${{\mathit e}^{\pm}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit D}^{(*)0}}{{\mathit \pi}^{+}}{{\mathit X}}$
$2420.1$ $\pm0.1$ $\pm0.8$ 103k
DEL-AMO-SANCH..
2010P
 BABR 0 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}{{\mathit X}}$
$2426$ $\pm3$ $\pm1$ 151
ABE
2005A
 BELL 0 ${{\mathit B}^{-}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$
$2421$ $\pm2$ $\pm1$ 124
ABE
2005A
 BELL + ${{\overline{\mathit B}}^{0}}$ $\rightarrow$ ${{\mathit D}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$
$2421.4$ $\pm1.5$ $\pm0.9$ 4
ABE
2004D
 BELL 0 ${{\mathit B}^{-}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$
$2421$ ${}^{+1}_{-2}$ $\pm2$ 286
AVERY
1994C
 CLE2 0 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}$ X
$2425$ $\pm2$ $\pm2$ 146
BERGFELD
1994B
 CLE2 + ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{*0}}{{\mathit \pi}^{+}}$ X
$2422$ $\pm2$ $\pm2$ 51
FRABETTI
1994B
 E687 0 ${{\mathit \gamma}}$ ${}^{}\mathrm {Be}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}$ X
$2428$ $\pm3$ $\pm2$ 279
AVERY
1990
CLEO 0 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}$ X
$2414$ $\pm2$ $\pm5$ 171
ALBRECHT
1989H
 ARG 0 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}$ X
$2428$ $\pm8$ $\pm5$ 171
ANJOS
1989C
 TPS 0 ${{\mathit \gamma}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}$ X
$2443$ $\pm7$ $\pm5$ 190
ANJOS
1989C
 TPS + ${{\mathit \gamma}}$ ${{\mathit N}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\mathit \pi}^{+}}{{\mathit X}^{0}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$2420.5$ $\pm2.1$ $\pm0.9$ 3.1k 5
CHEKANOV
2009
ZEUS 0 ${{\mathit e}^{\pm}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}{{\mathit X}}$
$2421.7$ $\pm0.7$ $\pm0.6$ 7.5k
ABULENCIA
2006A
 CDF 0 1900 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}{{\mathit X}}$
$2425$ $\pm3$ 235 6
ABREU
1998M
 DLPH 0 ${{\mathit e}^{+}}{{\mathit e}^{-}}$
1  From a full four-body amplitude analysis of the ${{\mathit B}^{-}}$ $\rightarrow$ ${{\mathit D}^{*+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{-}}$ decay.
2  From the combined fit of the ${{\mathit M}}({{\mathit D}^{+}}{{\mathit \pi}^{-}}$) and ${{\mathit M}}({{\mathit D}^{*+}}{{\mathit \pi}^{-}}$) distributions. and A$_{{{\mathit D}_{{{2}}}}}$ fixed to the theoretical prediction of $-1$.
3  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.
4  Fit includes the contribution from ${{\mathit D}_{{{1}}}^{*}{(2430)}^{0}}$.
5  Calculated using the mass difference $\mathit m({{\mathit D}_{{{1}}}^{0}}$) $−$ $\mathit m({{\mathit D}^{*+}})_{PDG}$ reported below and $\mathit m({{\mathit D}^{*+}})_{PDG}$ = $2010.27$ $\pm0.17$ MeV. The 0.17 MeV uncertainty of the PDG mass value should be added to the experimental uncertainty of 0.9 MeV.
6  No systematic error given.

           ${{\mathit D}_{{{1}}}{(2420)}}$ mass (MeV)
References