Observation of $J/\psi$ Electromagnetic Dalitz Decays to $X(1835)$, $X(2120)$ and $X(2370)$

Ablikim, M.; Achasov, M.N.; Adlarson, P.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M.R.; An, Q.; Bai, X.H.; Bai, Y.

doi:10.1103/PhysRevLett.129.022002

Observation of $J/\psi$ Electromagnetic Dalitz Decays to $X(1835)$ , $X(2120)$ and $X(2370)$

BESIII

Collaboration

Dec 28, 2021

8 pages

Published in:

Phys.Rev.Lett. 129 (2022) 2, 022002

Published: Jul 6, 2022

e-Print:

2112.14369 [hep-ex]

DOI:

10.1103/PhysRevLett.129.022002 (publication)

PDG:

{{\mathit J / \psi}{(1S)}}

\rightarrow

{{\mathit X}{(1835)}}{{\mathit e}^{+}}{{\mathit e}^{-}}

,

{{\mathit X}}

\rightarrow

{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \eta}^{\,'}}

Experiments:

BEPC-BES-III

View in:

pdf

reference search14 citations

Citations per year

Abstract: (APS)

Using a sample of about

10^{10} J / ψ

events collected at a center-of-mass energy

\sqrt{s} = 3.097 GeV

with the BESIII detector, the electromagnetic Dalitz decays

J / ψ \to e^{+} e^{-} π^{+} π^{-} η^{'}

, with

η^{'} \to γ π^{+} π^{-}

and

η^{'} \to π^{+} π^{-} η

, have been studied. The decay

J / ψ \to e^{+} e^{-} X (1835)

is observed with a significance of

15 σ

, and also an

e^{+} e^{-}

invariant-mass dependent transition form factor of

J / ψ \to e^{+} e^{-} X (1835)

is presented for the first time. The intermediate states

X (2120)

and

X (2370)

are also observed in the

π^{+} π^{-} η^{'}

invariant-mass spectrum with significances of

5.3 σ

and

7.3 σ

. The corresponding product branching fractions for

J / ψ \to e^{+} e^{-} X

,

X \to π^{+} π^{-} η^{'}

[

X = X (1835)

,

X (2120)

, and

X (2370)]

are reported.

Note:

9 pages, 3 figures

electron positron: annihilation
electron positron: colliding beams
J/psi(3100): electroproduction
J/psi(3100): semileptonic decay
pi: pair production
electron: pair production
form factor: transition
eta(958)
X(2120)
X(2370)

References(42)

Figures(4)

[1]

Observation of a resonance X(1835) in J / psi -> gamma pi+ pi- eta-prime

BES

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.Lett. 95 (2005) 262001
•
e-Print:
- hep-ex/0508025
•
DOI:
- 10.1103/PhysRevLett.95.262001

[2]

Confirmation of the $X(1835)$ and observation of the resonances $X(2120)$ and $X(2370)$ in $J/\psi\to \gamma \pi^+\pi^-\eta^\prime$

BESIII

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.Lett. 106 (2011) 072002
•
e-Print:
- 1012.3510
•
DOI:
- 10.1103/PhysRevLett.106.072002

[3]

Observation of an anomalous line shape of the $\eta^{\prime}\pi^{+}\pi^{-}$ mass spectrum near the $p\bar{p}$ mass threshold in $J/\psi\rightarrow\gamma\eta^{\prime}\pi^{+}\pi^{-}$

BESIII

Collaboration

•

Medina Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.Lett. 117 (2016) 4, 042002
•
e-Print:
- 1603.09653
•
DOI:
- 10.1103/PhysRevLett.117.042002

[4]

Observation and Spin-Parity Determination of the X(1835) in J/ψ → γ $K_S^0K_S^0η$

BESIII

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.Lett. 115 (2015) 9, 091803
•
e-Print:
- 1506.04807
•
DOI:
- 10.1103/PhysRevLett.115.091803

[5]

Study of $\eta(1475)$ and $X(1835)$ in radiative $J/\psi$ decays to $\gamma \phi$

BESIII

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.D 97 (2018) 5, 051101
•
e-Print:
- 1801.02127
•
DOI:
- 10.1103/PhysRevD.97.051101

[6]

Observation of a near threshold enhancement in th p anti-p mass spectrum from radiative J / psi ---> gamma p anti-p decays

BES

Collaboration

•

J.Z. Bai

et al.

- Phys.Rev.Lett. 91 (2003) 022001
•
e-Print:
- hep-ex/0303006
•
DOI:
- 10.1103/PhysRevLett.91.022001

[7]

Spin-Parity Analysis of $p\bar{p}$ Mass Threshold Structure in $J/\psi$ and $\psi^\prime$ Radiative Decays

BESIII

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.Lett. 108 (2012) 112003
•
e-Print:
- 1112.0942
•
DOI:
- 10.1103/PhysRevLett.108.112003

[8]

Study of $\psi(2S)$ Decays to $\gamma p \bar{p}$ , $\pi^0 p \bar{p}$ and $\eta p \bar{p}$ and Search for $p \bar{p}$ Threshold Enhancements

CLEO

Collaboration

•

J.P. Alexander
(
- Cornell U., Phys. Dept.
)

et al.

- Phys.Rev.D 82 (2010) 092002
•
e-Print:
- 1007.2886
•
DOI:
- 10.1103/PhysRevD.82.092002

[9]

One pion exchange final state interaction and the p anti-p near threshold enhancement in J / psi ---> gamma p anti-p decays

- Phys.Rev.D 69 (2004) 034004
•
e-Print:
- hep-ph/0309273
•
DOI:
- 10.1103/PhysRevD.69.034004

[10]

Can the observed enhancement in the mass spectrum of p anti-p in J / psi ---> gamma p anti-p be interpreted by a possible p anti-p n d bound state

Xiang Liu
(
- Nankai U.
)
,
Xiao-Qiang Zeng
(
- Nankai U.
)
,
Yi-Bing Ding
(
- CCAST World Lab, Beijing and
- Beijing, GUCAS
)
,
Xue-Qian Li
(
)
,
Hong Shen
(
- Nankai U.
)

et al.

e-Print:
- hep-ph/0406118

[11]

A New state of baryonium

Alakabha Datta
(
- Toronto U.
)
,
Patrick J. O'Donnell
(
- Toronto U.
)

- Phys.Lett.B 567 (2003) 273-276
•
e-Print:
- hep-ph/0306097
•
DOI:
- 10.1016/j.physletb.2003.06.050

[12]

Radiative decays of the upsilon(1S) to a pair of charged hadrons

CLEO

Collaboration

•

S.B. Athar
(
- Florida U.
)

et al.

- Phys.Rev.D 73 (2006) 032001
•
e-Print:
- hep-ex/0510015
•
DOI:
- 10.1103/PhysRevD.73.032001

[13]

Study of $J/ψ → ωp\overline{p}$ at BESIII

BESIII

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.D 87 (2013) 11, 112004
•
e-Print:
- 1303.3108
•
DOI:
- 10.1103/PhysRevD.87.112004

[14]

Study of $J/\psi\to p\bar{p}\phi$ at BESIII

BESIII

Collaboration

•

Medina Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.D 93 (2016) 5, 052010
•
e-Print:
- 1512.08197
•
DOI:
- 10.1103/PhysRevD.93.052010

[15]

Observation of a State $X(2600)$ in the $\pi^{+}\pi^{-}\eta'$ System in the Process $J/\psi\rightarrow\gamma\pi^{+}\pi^{-}\eta'$

BESIII

Collaboration

•

M. Ablikim
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.Lett. 129 (2022) 4, 042001
•
e-Print:
- 2201.10796
•
DOI:
- 10.1103/PhysRevLett.129.042001

[16]

Electromagnetic Decays of Light Mesons

L.G. Landsberg
(
- Serpukhov, IHEP
)

- Phys.Rept. 128 (1985) 301-376,
- Phys. Rep. 128 ( 1985) 301-376
•
DOI:
- 10.1016/0370-1573(85)90129-2

[17]

Study of vector charmonium electromagnetic Dalitz decays

- Int.J.Mod.Phys.A 34 (2019) 23, 1950129
•
DOI:
- 10.1142/S0217751X1950129X

[18]

Study of the electromagnetic Dalitz decays $\psi(\Upsilon) \to \eta_{c}(\eta_{b}) l^{+} l^{-}$

Li-Min Gu
(
- Nanjing U. (main)
)
,
Hai-Bo Li
(
- Beijing, Inst. High Energy Phys. and
- Beijing, GUCAS
)
,
Xin-Xin Ma
(
- Beijing, Inst. High Energy Phys. and
- Beijing, GUCAS
)
,
Mao-Zhi Yang
(
- Nankai U.
)

- Phys.Rev.D 100 (2019) 1, 016018
•
e-Print:
- 1904.06085
•
DOI:
- 10.1103/PhysRevD.100.016018

[19]

Study of the Electromagnetic Transitions $J/\psi \rightarrow P l^+l^-$ and Probe Dark Photon

Jinlin Fu
(
- Nanjing U. and
- Beijing, Inst. High Energy Phys.
)
,
Hai-Bo Li
(
- Beijing, Inst. High Energy Phys.
)
,
Xiaoshuai Qin
(
- Beijing, Inst. High Energy Phys.
)
,
Mao-Zhi Yang
(
- Nankai U.
)

- Mod.Phys.Lett.A 27 (2012) 1250223
•
e-Print:
- 1111.4055
•
DOI:
- 10.1142/S0217732312502239

[20]

Internal pair production associated with the emission of high-energy gamma rays

- Phys.Rev. 98 (1955) 1355-1359
•
DOI:
- 10.1103/PhysRev.98.1355

[21]

A Possible 0-+ glueball candidate X(1835)

Bing An Li
(
- Kentucky U.
)

- Phys.Rev.D 74 (2006) 034019
•
e-Print:
- hep-ph/0510093
•
DOI:
- 10.1103/PhysRevD.74.034019

[22]

0-+ trigluon glueball and its implication for a recent BES observation

Gang Hao
(
- Beijing, GUCAS
)
,
Cong-Feng Qiao
(
- CCAST World Lab, Beijing and
- Beijing, GUCAS
)
,
Ai-Lin Zhang
(
- Shanghai U.
)

- Phys.Lett.B 642 (2006) 53-61
•
e-Print:
- hep-ph/0512214
•
DOI:
- 10.1016/j.physletb.2006.09.031

[23]

Some properties of the newly observed X(1835) state at BES

Xiao-Gang He
(
- Nankai U. and
- NCTS, Taipei
)
,
Xue-Qian Li
(
- Nankai U.
)
,
Xiang Liu
(
- Nankai U.
)
,
J.P. Ma
(
- Beijing, Inst. Theor. Phys.
)

- Eur.Phys.J.C 49 (2007) 731-736
•
e-Print:
- hep-ph/0509140
•
DOI:
- 10.1140/epjc/s10052-006-0129-y

[24]

X(1835): A Natural candidate of eta-prime's second radial excitation

Tao Huang
(
- Beijing, Inst. High Energy Phys. and
- CCAST World Lab, Beijing
)
,
Shi-Lin Zhu
(
- Peking U.
)

- Phys.Rev.D 73 (2006) 014023
•
e-Print:
- hep-ph/0511153
•
DOI:
- 10.1103/PhysRevD.73.014023

[25]

Excited states of $\phi$ meson

Cheng-Qun Pang
(
- Qinghai Normal U.
)

- Phys.Rev.D 99 (2019) 7, 074015
•
e-Print:
- 1902.02206
•
DOI:
- 10.1103/PhysRevD.99.074015

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Observation of J/ψJ/\psiJ/ψ Electromagnetic Dalitz Decays to X(1835)X(1835)X(1835), X(2120)X(2120)X(2120) and X(2370)X(2370)X(2370)

Citations per year

Observation of $J/\psi$ Electromagnetic Dalitz Decays to $X(1835)$ , $X(2120)$ and $X(2370)$