Search for resonances decaying to $\eta_c \pi^+ \pi^-$ in two-photon interactions - INSPIRE

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Search for resonances decaying to $\eta_c \pi^+ \pi^-$ in two-photon interactions

BaBar

Collaboration

•

J.P. Lees
(
- Annecy, LAPP
)

Jun, 2012

9 pages

Published in:

Phys.Rev.D 86 (2012) 092005

e-Print:

1206.2008 [hep-ex]

DOI:

10.1103/PhysRevD.86.092005

PDG:

{{\mathit \chi}_{{{c2}}}{(3930)}}

\rightarrow

{{\mathit \gamma}}{{\mathit \gamma}}

Report number:

BABAR-PUB-12-004,
SLAC-PUB-15052

Experiments:

SLAC-PEP2-BABAR

View in:

reference search14 citations

Citations per year

Abstract: (arXiv)

We report a study of the process gamma gamma -> X -> eta_c pi+ pi-, where X stands for one of the resonances chi_{c2}(1P), eta_c(2S), X(3872), X(3915), or chi_{c2}(2P). The analysis is performed with a data sample of 473.9 fb^{-1} collected with the BaBar detector at the PEP-II asymmetric-energy electron-positron collider. We do not observe a significant signal for any channel, and calculate 90% confidence-level upper limits on the products of branching fractions and two-photon widths Gamma(X -> gamma gamma)BR(X -> eta_c pi+ pi-): 15.7 eV for chi_{c2}(1P), 133 eV for eta_c(2S), 11.1 eV for X(3872) (assuming it to be a spin-2 state), 16 eV for X(3915) (assuming it to be a spin-2 state), and 19 eV for chi_{c2}(2P). We also report upper limits on the ratios of branching fractions BR(eta_c(2S) -> eta_c pi+ pi-)/BR(eta_c(2S)-> K_S^0 K+ pi-) < 10.0 and BR(chi_{c2}(1P) -> eta_c pi+ pi-)/BR(chi_{c2}(1P)-> K_S^0 K+ pi-) <32.9 at the 90% confidence level.

Note:

9 pages, 12 figures. To be submitted to Phys. Rev. D (Rapid Communications)

13.25.Gv
14.40.Pq
branching ratio: ratio
photon photon: interaction
exchange: two-photon
X(3872)
electron positron: inelastic scattering
BaBar
eta/c(2980): hadronic decay
charmonium: hadron spectroscopy

References(46)

Figures(12)

[1]

Observation of $\eta_c(1S)$ and $\eta_c(2S)$ decays to $K^+ K^- \pi^+ \pi^- \pi^0$ in two-photon interactions

BaBar

Collaboration

•

P. del Amo Sanchez
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 84 (2011) 012004
•
e-Print:
- 1103.3971
•
DOI:
- 10.1103/PhysRevD.84.012004

[2]

Observation of the $\chi_{c2}(2p)$ Meson in the Reaction $\gamma \gamma \to D \bar{D}$ at {BaBar}

BaBar

Collaboration

•

B. Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 81 (2010) 092003
•
e-Print:
- 1002.0281
•
DOI:
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[3]

We refer to the ηc(1S) as ηc

[4]

Search for psi(2S) ---> gamma eta(c) (2S) via fully reconstructed eta(c)(2S) decays

CLEO

Collaboration

•

D. Cronin-Hennessy
(
- Minnesota U.
)

et al.

- Phys.Rev.D 81 (2010) 052002
•
e-Print:
- 0910.1324
•
DOI:
- 10.1103/PhysRevD.81.052002

[5]

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M.B. Voloshin
(
- Minnesota U., Theor. Phys. Inst. and
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)

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•
e-Print:
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•
DOI:
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BES

Collaboration

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•
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[8]

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Belle

Collaboration

•

S.K. Choi
(
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)

et al.

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•
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[11]

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BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

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•
e-Print:
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•
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[9]

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Evidence of a broad structure at an invariant mass of 4.32- $GeV/c^{2}$ in the reaction $e^{+} e^{-} \to \pi^{+} \pi^{-} \psi_{2S}$ measured at BaBar

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

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•
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•
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[10]

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Eric S. Swanson
(
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)

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•
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[10]

N.A. Tornqvist

[10]

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Nils A. Tornqvist
(
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)

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•
e-Print:
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•
DOI:
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[10]

L. Maiani
,
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,
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,
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[10]

Four quark interpretation of Y(4260)

L. Maiani
(
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)
,
V. Riquer
(
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)
,
F. Piccinini
(
- INFN, Pavia and
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)
,
A.D. Polosa
(
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)

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•
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•
DOI:
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[11]

Observation of a broad structure in the $\pi^+ \pi^- J/\psi$ mass spectrum around 4.26-GeV/c $^2$

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 95 (2005) 142001
•
e-Print:
- hep-ex/0506081
•
DOI:
- 10.1103/PhysRevLett.95.142001

[11]

C.Z. Yuan

[11]

Measurement of e+ e- ---> pi+ pi- J/psi cross-section via initial state radiation at Belle

Belle

Collaboration

•

C.Z. Yuan

et al.

- Phys.Rev.Lett. 99 (2007) 182004
•
e-Print:
- 0707.2541
•
DOI:
- 10.1103/PhysRevLett.99.182004

[11]

CDF Collaboration

Collaboration

•

D. Acosta

for the collaboration.

[11]

Observation of the narrow state $X(3872) \to J/\psi \pi^+ \pi^-$ in $\bar{p}p$ collisions at $\sqrt{s} = 1.96$ TeV

CDF

Collaboration

•

D. Acosta
(
- Florida U.
)

et al.

- Phys.Rev.Lett. 93 (2004) 072001
•
e-Print:
- hep-ex/0312021
•
DOI:
- 10.1103/PhysRevLett.93.072001

[11]

V.M. Abazov

[11]

Observation and properties of the $X(3872)$ decaying to $J/\psi \pi^+ \pi^-$ in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV

D0

Collaboration

•

V.M. Abazov
(
- Dubna, JINR
)

et al.

- Phys.Rev.Lett. 93 (2004) 162002
•
e-Print:
- hep-ex/0405004
•
DOI:
- 10.1103/PhysRevLett.93.162002

[12]

Search for a charmonium assignment for the X(3872)

Belle

Collaboration

•

Stephen L. Olsen
(
- Hawaii U.
)

for the collaboration.

- Int.J.Mod.Phys.A 20 (2005) 240-249
•
e-Print:
- hep-ex/0407033
•
DOI:
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[13]

Analysis of the quantum numbers $J^{PC}$ of the $X(3872)$

CDF

Collaboration

•

A. Abulencia
(
- Illinois U., Urbana
)

et al.

- Phys.Rev.Lett. 98 (2007) 132002
•
e-Print:
- hep-ex/0612053
•
DOI:
- 10.1103/PhysRevLett.98.132002

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