Measurement of $\eta_c(1S), \eta_c(2S)$ and non-resonant $\eta' \pi^+ pi^-$ production via two-photon collisions - INSPIRE

DataBETA

Measurement of $\eta_c(1S), \eta_c(2S)$ and non-resonant $\eta' \pi^+ pi^-$ production via two-photon collisions

Belle

Collaboration

•

Q.N. Xu
(
- Beijing, GUCAS and
- Beijing, Inst. High Energy Phys.
)

May 8, 2018

19 pages

Published in:

Phys.Rev.D 98 (2018) 7, 072001

Published: Oct 10, 2018

e-Print:

1805.03044 [hep-ex]

DOI:

10.1103/PhysRevD.98.072001

PDG:

{{\mathit \eta}_{{{c}}}{(1S)}}

\rightarrow

{{\mathit \eta}^{\,'}{(958)}}{{\mathit \pi}}{{\mathit \pi}}

Experiments:

KEK-BF-BELLE

View in:

ADS Abstract Service

reference search11 citations

Citations per year

Abstract: (APS)

We report the measurement of γγ→ηc(1S),ηc(2S)→η′π+π- with η′ decays to γρ and ηπ+π- using 941 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The ηc(1S) mass and width are measured to be M=[2984.6±0.7 (stat)±2.2 (syst)±0.3 (model)] MeV/c2 and Γ=[30.8-2.2+2.3 (stat)±2.5 (syst)±1.4 (model)] MeV, respectively. First observation of ηc(2S)→η′π+π- with a significance of 5.5σ including systematic error is obtained, and the ηc(2S) mass is measured to be M=[3635.1±3.7 (stat)±2.9 (syst)±0.4 (model)] MeV/c2. The products of the two-photon decay width and branching fraction (B) of decays to η′π+π- are determined to be ΓγγΓγγB=[65.4±2.6 (stat)±7.8 (syst)] eV for ηc(1S) and [5.6−1.1+1.2 (stat)±1.1 (syst)] eV for ηc(2S). The cross sections for γγ→η′π+π- and η′f2(1270) are measured for the first time.

Note:

19 pages, 14 figures •
Submitted to Phys.Rev.D

Particle Physics Experiments
electron positron: annihilation
electron positron: colliding beams
photon photon: interaction
eta/c(2980): photoproduction
eta/c(3590): photoproduction
eta(958): radiative decay
eta(958): hadronic decay
mass spectrum: (eta(958) pi+ pi-)
mass spectrum: (pi+ pi-)

References(46)

Figures(22)

[1]

Heavy Quarkonium: Progress, Puzzles, and Opportunities

N. Brambilla
(
- Munich, Tech. U.
)
,
S. Eidelman
(
- Novosibirsk State U. and
- Novosibirsk, IYF
)
,
B.K. Heltsley
(
- Cornell U., Phys. Dept.
)
,
R. Vogt
(
- UC, Davis and
- LLNL, Livermore
)
,
G.T. Bodwin
(
- Argonne
)

et al.

- Eur.Phys.J.C 71 (2011) 1534
•
e-Print:
- 1010.5827
•
DOI:
- 10.1140/epjc/s10052-010-1534-9

[2]

Two-photon width of eta(c) and eta(c)-prime from heavy-quark spin symmetry

J.P. Lansberg
(
- Ecole Polytechnique, CPHT and
- Liege U.
)
,
T.N. Pham
(
- Ecole Polytechnique, CPHT
)

- Phys.Rev.D 74 (2006) 034001
•
e-Print:
- hep-ph/0603113
•
DOI:
- 10.1103/PhysRevD.74.034001

[3]

Effective Field Theories for Heavy Quarkonium

Nora Brambilla
(
- INFN, Milan and
- Milan U.
)
,
Antonio Pineda
(
- Barcelona U., ECM and
- Barcelona, IFAE
)
,
Joan Soto
(
- Barcelona U., ECM and
- Barcelona, IFAE
)
,
Antonio Vairo
(
- INFN, Milan and
- Milan U.
)

- Rev.Mod.Phys. 77 (2005) 1423
•
e-Print:
- hep-ph/0410047
•
DOI:
- 10.1103/RevModPhys.77.1423

[4]

Measurements of the mass and width of the $\eta_c$ using $\psi' -> \gamma \eta_c$

BESIII

Collaboration

•

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

et al.

- Phys.Rev.Lett. 108 (2012) 222002
•
e-Print:
- 1111.0398
•
DOI:
- 10.1103/PhysRevLett.108.222002

[5]

Study of $\psi(3686)\to\pi^0 h_c, h_c\to\gamma\eta_c$ via $\eta_c$ exclusive decays

BESIII

Collaboration

•

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

et al.

- Phys.Rev.D 86 (2012) 092009
•
e-Print:
- 1209.4963
•
DOI:
- 10.1103/PhysRevD.86.092009

[5]

First observation of the M1 transition $\psi(3686)\to \gamma\eta_c(2S)$

BES

Collaboration

•

M. Ablikim
(
- Novosibirsk, IYF
)

et al.

- Phys.Rev.Lett. 109 (2012) 042003
•
e-Print:
- 1205.5103
•
DOI:
- 10.1103/PhysRevLett.109.042003

[6]

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

[7]

Study of $B^{\pm}\to K^{\pm}(K_{S}K\pi)^0$ decay and determination of $\eta_c$ and $\eta_{c}(2S)$ parameters

Belle

Collaboration

•

A. Vinokurova
(
- Novosibirsk, IYF and
- Novosibirsk State U.
)

et al.

- Phys.Lett.B 706 (2011) 139-149
•
e-Print:
- 1105.0978
•
DOI:
- 10.1016/j.physletb.2011.11.014

[8]

Study of charmonia in four-meson final states produced in two-photon collisions

Belle

Collaboration

•

S. Uehara
(
- KEK, Tsukuba
)

et al.

- Eur.Phys.J.C 53 (2008) 1-14
•
e-Print:
- 0706.3955
•
DOI:
- 10.1140/epjc/s10052-007-0451-z

[9]

Observation of eta-prime(c) production in gamma gamma fusion at CLEO

CLEO

Collaboration

•

D.M. Asner
(
- Pittsburgh U.
)

et al.

- Phys.Rev.Lett. 92 (2004) 142001
•
e-Print:
- hep-ex/0312058
•
DOI:
- 10.1103/PhysRevLett.92.142001

[10]

Study of B-meson decays to eta(c) K(), eta(c)(2S) K() and eta(c) gamma K(*)

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.D 78 (2008) 012006
•
e-Print:
- 0804.1208
•
DOI:
- 10.1103/PhysRevD.78.012006

[11]

First study of $\eta_c$ , $\eta(1760)$ and $X(1835)$ production via $\eta^\prime\pi^+\pi^-$ final states in two-photon collisions

Belle

Collaboration

•

C.C. Zhang
(
- Beijing, Inst. High Energy Phys.
)

et al.

- Phys.Rev.D 86 (2012) 052002
•
e-Print:
- 1206.5087
•
DOI:
- 10.1103/PhysRevD.86.052002

[12]

Two photon widths of singlet positronium and quarkonium with arbitrary total angular momentum

E.S. Ackleh
(
- Tennessee U.
)
,
Ted Barnes
(
- Oak Ridge and
- Tennessee U.
)

- Phys.Rev.D 45 (1992) 232-240
•
DOI:
- 10.1103/PhysRevD.45.232

[13]

The Decay eta(c) ---> gamma gamma: A Test for potential models

- Phys.Rev.D 51 (1995) 141-146
•
e-Print:
- hep-ph/9401315
•
DOI:
- 10.1103/PhysRevD.51.141

[14]

Two photon decays of mesons in a relativistic quark model

Claus R. Munz
(
- Bonn U.
)

- Nucl.Phys.A 609 (1996) 364-376
•
e-Print:
- hep-ph/9601206
•
DOI:
- 10.1016/S0375-9474(96)00265-5

[15]

Pseudoscalar heavy quarkonium decays with both relativistic and QCD radiative corrections

Kuang-Ta Chao
(
- CCAST World Lab, Beijing and
- Peking U.
)
,
Han-Wen Huang
(
- Peking U.
)
,
Jing-Hua Liu
(
- Peking U.
)
,
Jian Tang
(
- Peking U.
)

- Phys.Rev.D 56 (1997) 368-376
•
e-Print:
- hep-ph/9601381
•
DOI:
- 10.1103/PhysRevD.56.368

[16]

Two photon decay rates of heavy quarkonia in the relativistic quark model

D. Ebert
(
- Humboldt U., Berlin
)
,
R.N. Faustov
(
- Humboldt U., Berlin and
- Moscow, Cybernetics Council
)
,
V.O. Galkin
(
- Humboldt U., Berlin and
- Moscow, Cybernetics Council
)

- Mod.Phys.Lett.A 18 (2003) 601-608
•
e-Print:
- hep-ph/0302044
•
DOI:
- 10.1142/S021773230300971X

[17]

Annihilation rate of heavy 0-+ quarkonium in relativistic Salpeter method

C.S. Kim
(
- Yonsei U. and
- NCTS, Hsinchu
)
,
Taekoon Lee
(
- Seoul Natl. U.
)
,
Guo-Li Wang
(
- Yonsei U.
)

- Phys.Lett.B 606 (2005) 323-328
•
e-Print:
- hep-ph/0411075
•
DOI:
- 10.1016/j.physletb.2004.11.084

[18]

Large Angle Two Photon Exclusive Channels in Quantum Chromodynamics

Stanley J. Brodsky
(
- SLAC
)
,
G.Peter Lepage
(
- Cornell U., LNS
)

- Phys.Rev.D 24 (1981) 1808,
- Paris Photon-Photon 1981:205
•
DOI:
- 10.1103/PhysRevD.24.1808

[19]

Asymptotic Behavior of Exclusive Processes in QCD

V.L. Chernyak
(
- Novosibirsk, IYF
)
,
A.R. Zhitnitsky
(
- Novosibirsk, IYF
)

- Phys.Rept. 112 (1984) 173
•
DOI:
- 10.1016/0370-1573(84)90126-1

[20]

SU(3) Symmetry Breaking Effects in $\gamma \gamma \to$ Two Mesons Processes

- Nucl.Phys.B 329 (1990) 285-309
•
DOI:
- 10.1016/0550-3213(90)90143-2

[21]

The Handbag contribution to gamma gamma ---> pi pi and K K

- Phys.Lett.B 532 (2002) 99-110
•
e-Print:
- hep-ph/0112274
•
DOI:
- 10.1016/S0370-2693(02)01489-2

[22]

The Physics of the B Factories

BaBar and
Belle

Collaborations

•

A.J. Bevan
(
- Queen Mary, U. of London
)

et al.

- Eur.Phys.J.C 74 (2014) 3026
•
e-Print:
- 1406.6311
•
DOI:
- 10.1140/epjc/s10052-014-3026-9

[23]

The Belle Detector

Belle

Collaboration

•

A. Abashian

et al.

- Nucl.Instrum.Meth.A 479 (2002) 117-232
•
DOI:
- 10.1016/S0168-9002(01)02013-7

[23]

Physics Achievements from the Belle Experiment

Belle

Collaboration

•

Jolanta Brodzicka
(
- Cracow, INP
)

et al.

- PTEP 2012 (2012) 04D001
•
e-Print:
- 1212.5342
•
DOI:
- 10.1093/ptep/pts072

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