Observation of $e^+e^- \rightarrow D_s^+ \overline{D}{}^{(*)0} K^-$ and study of the $P$-wave $D_s$ mesons

Ablikim, Medina; Achasov, Mikhail N; Ahmed, Samer Ali Nasher; Albrecht, Malte; Alekseev, Maxim; Amoroso, Antonio; An, Fenfen; An, Qi; Bai, Yu; Bakina, Olga

doi:10.1088/1674-1137/43/3/031001

Observation of $e^+e^- \rightarrow D_s^+ \overline{D}{}^{(*)0} K^-$ and study of the $P$ -wave $D_s$ mesons

BESIII

Collaboration

Dec 23, 2018

Published in:

Chin.Phys.C 43 (2019) 3, 031001,
Chin.Phys.C 43 (2019) 12, 129102 (erratum)

Published: Mar 12, 2019

e-Print:

1812.09800 [hep-ex]

DOI:

10.1088/1674-1137/43/3/031001,
10.1088/1674-1137/43/12/129102 (erratum)

PDG:

{{\mathit D}_{{{s1}}}{(2536)}^{\pm}}

MASS

Experiments:

BEPC-BES-III

View in:

ADS Abstract Service

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reference search11 citations

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Abstract: (arXiv)

Studies of

e^+e^- \to D_s^+ \overline{D}{}^{(*)0}K^-

and the

P

-wave charmed-strange mesons are performed based on an

e^+e^-

collision data sample corresponding to an integrated luminosity of 567 pb

^{-1}

collected with the BESIII detector at

\sqrt{s}= 4.600

GeV. The processes of

e^+e^-\to D_s^+ \overline{D}{*}^{0} K^-

and

D_s^+ \overline{D}{}^{0} K^-

are observed for the first time and are found to be dominated by the modes

D_s^+ D_{s1}(2536)^-

and

D_s^+ D^*_{s2}(2573)^-

, respectively. The Born cross sections are measured to be

\sigma^{B}(e^+e^-\to D_s^+ \overline{D}{*}^{0} K^-) = (10.1\pm2.3\pm0.8) pb

and

\sigma^{B}(e^+e^-\to D_s^+ \overline{D}{}^{0} K^-) = (19.4\pm2.3\pm1.6) pb

, and the products of Born cross section and the decay branching fraction are measured to be

\sigma^{B}(e^+e^-\to D_s^+D_{s1}(2536)^- + c.c.)\cdot\mathcal{B}(D_{s1}(2536)^- \to \overline{D}{*}^{0} K^-) = (7.5 \pm 1.8 \pm 0.7) pb

and

\sigma^{B}(e^+e^-\to D_s^+ D^*_{s2}(2573)^- + c.c.)\cdot\mathcal{B}(D^*_{s2}(2573)^- \to \overline{D}{}^{0} K^-) = (19.7 \pm 2.9 \pm 2.0) pb

. For the

D_{s1}(2536)^-

and

D^*_{s2}(2573)^-

mesons, the masses and widths are measured to be

M(D_{s1}(2536)^-) = (2537.7 \pm 0.5 \pm 3.1)~MeV/c^2,

\Gamma(D_{s1}(2536)^-)) = (1.7\pm 1.2 \pm 0.6)~\rm MeV,

and

M(D^*_{s2}(2573)^-) = (2570.7\pm 2.0 \pm 1.7)~MeV/c^2,

\Gamma(D^*_{s2}(2573)^-) = (17.2 \pm 3.6 \pm 1.1)~\rm MeV.

The spin-parity of the

D^*_{s2}(2573)^-

meson is determined to be

J^P=2^{+}

. In addition, the process

e^+e^-\to D_s^+ \overline{D}{}^{(*)0} K^-

are searched for using the data samples taken at four (two) center-of-mass energies between 4.416 (4.527) and 4.575 GeV, and upper limits at the

90\%

confidence level on the cross sections are determined.

electron positron: annihilation
electron positron: colliding beams
charmed meson: electroproduction
Born approximation
tree approximation
channel cross section: measured
channel cross section: branching ratio: measured
channel cross section: upper limit
charmed meson: mass
charmed meson: width

References(0)

Figures(15)

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Observation of e+e−→Ds+D‾(∗)0K−e^+e^- \rightarrow D_s^+ \overline{D}{}^{(*)0} K^-e+e−→Ds+​D(∗)0K− and study of the PPP-wave DsD_sDs​ mesons

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Observation of $e^+e^- \rightarrow D_s^+ \overline{D}{}^{(*)0} K^-$ and study of the $P$ -wave $D_s$ mesons