English

Observation of the $X(1840)$ at BESIII

High Energy Physics - Experiment 2019-08-13 v1
Authors: Jingqing Zhang
View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Observation of the X(1840)X(1840) in the 3(π+π−)3(\pi^+\pi^-) invariant mass in J/ψ→γ3(π+π−)J/\psi\rightarrow\gamma 3(\pi^+\pi^-) at BESIII is reviewed. With a sample of 225.3×106225.3\times10^6 J/ψJ/\psi events collected with the BESIII detector at BEPCII, the X(1840)X(1840) is observed with a statistical significance of 7.6σ7.6\sigma. The mass, width and product branching fraction of the X(1840)X(1840) are determined. The decay η′→3(π+π−)\eta^\prime\rightarrow 3(\pi^+\pi^-) is searched for, and the upper limit of the branching fraction is set at the 90% confidence level.

Keywords

$X(1840)$ BESIII $J/\psi$ decay invariant mass statistical significance branching fraction $\eta^\prime$ decay

Cite

@article{arxiv.1403.0167,
  title  = {Observation of the $X(1840)$ at BESIII},
  author = {Jingqing Zhang},
  journal= {arXiv preprint arXiv:1403.0167},
  year   = {2019}
}

Comments

4 pages, 3 figures, proceeding of PIC2013

Related papers

View all related →
High Energy Physics - Experiment · Physics
Observation of a structure at 1.84 GeV/c$^2$ in the $3(\pi^+\pi^-)$ mass spectrum in $J/\psi\rightarrow \gamma 3(\pi^+\pi^-)$ decays
BESIII Collaboration, M. Ablikim, M. N. Achasov, O. Albayrak +361
2013-11-20
High Energy Physics - Experiment · Physics
Measurement of the branching fraction of $J/\psi \rightarrow \omega \eta' \pi^{+}\pi^{-}$ and search for $J/\psi \rightarrow \omega X(1835), \, X(1835) \rightarrow \eta' \pi^{+}\pi^{-}$ decay
BESIII Collaboration
2019-04-10
High Energy Physics - Experiment · Physics
Observation and study of the decay $J/\psi\rightarrow\phi\eta\eta'$
M. Ablikim, M. N. Achasov, S. Ahmed, M. Albrecht +456
2019-07-24
High Energy Physics - Experiment · Physics
Study of $J/\psi \rightarrow \omega p \bar{p}$ at BESIII
The BESIII Collaboration, M. Ablikim, M. N. Achasov, O. Albayrak +362
2013-06-14
High Energy Physics - Experiment · Physics
Study of J/psi->eta phi pi+pi- at BESIII
M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak +403
2015-03-25
High Energy Physics - Experiment · Physics
Observation of a resonance X(1835) in J/\psi --> \gamma \pi^+ \pi^- \eta^{\prime}
BES Collaboration, M. Ablikim
2008-11-26
High Energy Physics - Experiment · Physics
Observation of the Anomalous Shape of $X(1840)$ in $J/\psi \rightarrow \gamma 3(\pi^+ \pi^-)$ Indicating a Second Resonance Near $p\bar{p}$ Threshold
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +625
2024-04-17
High Energy Physics - Experiment · Physics
Measurement of {\boldmath $J/\psi\to\Xi(1530)^{-}\bar\Xi^{+}$} and evidence for the radiative decay {\boldmath $\Xi(1530)^{-}\to\gamma\Xi^-$}
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +481
2020-01-14
High Energy Physics - Experiment · Physics
Observation of $J/\psi\to \gamma\eta\pi^{0}$
M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak +414
2017-03-15
High Energy Physics - Experiment · Physics
Confirmation of the X(1835) and observation of the resonances X(2120) and X(2370) in J/psi->gamma pi^+pi^-eta'
BESIII Collaboration
2012-08-27
High Energy Physics - Experiment · Physics
Study of $J/\psi\to p\bar{p}\phi$ at BESIII
BESIII Collaboration, M. Ablikim, M. N. Achasov, X. C. Ai +409
2016-03-23
High Energy Physics - Experiment · Physics
Search for $X(1870)$ via the decay $J/\psi\to \omega K^+ K^-\eta$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +665
2024-06-17
High Energy Physics - Experiment · Physics
Observation of the decay $\psi(3686)\rightarrow \Sigma^{0}\bar{\Sigma}^{0}\omega$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +716
2025-05-14
High Energy Physics - Experiment · Physics
Observation of $\chi_{cJ}\to 3(K^+K^-)$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +653
2023-12-29
High Energy Physics - Experiment · Physics
Measurement of Branching Fractions of $J/\psi$ and $\psi(3686)$ decays to $\Sigma^{+}$ and $\overline{\Sigma}^-$
M. Ablikim, M. N. Achasov, P. Adlarson, S. Ahmed +511
2022-01-26
High Energy Physics - Experiment · Physics
Observation of $\psi(3686)\to 3\phi$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +666
2025-10-09
High Energy Physics - Experiment · Physics
Improved measurement of the branching fractions for $J/\psi\to\gamma\pi^0$, $\gamma\eta$ and $\gamma\eta^\prime$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +619
2023-08-29
High Energy Physics - Experiment · Physics
Measurement of the branching fraction of the decay $J/\psi \to p \bar{p} \eta$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +660
2025-05-01
High Energy Physics - Experiment · Physics
First measurements of the branching fractions of $J/\psi\to \Xi^0\bar\Lambda K^0_S+c.c.$, $J/\psi\to \Xi^0\bar\Sigma^0 K^0_S+c.c.$, and $J/\psi\to \Xi^0\bar\Sigma^- K^++c.c.$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +705
2025-12-18
High Energy Physics - Experiment · Physics
Search for invisible decays of $\omega$ and $\phi$ with $J/\psi$ data at BESIII
M. Ablikim, M. N. Achasov, S. Ahmed, M. Albrecht +459
2018-08-08
High Energy Physics - Experiment · Physics
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, M. N. Achasov, P. Adlarson +565
2022-07-26
High Energy Physics - Experiment · Physics
Observation of the $J/\psi$ and $\psi(3686)$ decays into $\eta\Sigma^{+}\bar{\Sigma}^{-}$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +580
2022-12-29
High Energy Physics - Experiment · Physics
Observation of the decay $\psi(3686)$ $\rightarrow$ $\Lambda\bar\Sigma^{\pm}\pi^{\mp}+c.c.$
BESIII collaboration, M. Ablikim, M. N. Achasov, X. C. Ai +374
2013-12-16
High Energy Physics - Experiment · Physics
Amplitude Analysis of the Decays $\eta^\prime \rightarrow \pi^+\pi^-\pi^0$ and $\eta^\prime \rightarrow \pi^0\pi^0\pi^0$
M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak +421
2017-01-11
High Energy Physics - Experiment · Physics
Observation of $\chi_{cJ}\to 3K_S^0K^\pm\pi^\mp$
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson +699
2025-09-29