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

DataBETA

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

BESIII

Collaboration

Nov, 2011

6 pages

Published in:

Phys.Rev.Lett. 108 (2012) 222002

e-Print:

1111.0398 [hep-ex]

DOI:

10.1103/PhysRevLett.108.222002

PDG:

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

Experiments:

View in:

reference search64 citations

Citations per year

Abstract: (arXiv)

The mass and width of the lowest lying S-wave spin singlet charmonium state, the eta_c, are measured using a data sample of 1.06x10^8 psi' decays collected with the BESIII detector at the BEPCII storage ring. We use a model that incorporates interference between the signal reaction, psi' -> gamma eta_c, and a non-resonant radiative background to successfully describe the line shape of the eta_c. We measure the eta_c mass to be 2984.3 +- 0.6 +- 0.6 MeV/c^2 and the total width to be 32.0 +- 1.2 +- 1.0 MeV, where the first errors are statistical and the second are systematic.

Note:

7 pages, 1 figure, 1 table, matches Phys. Rev. Lett. version

13.20.Gd
13.25.Gv
14.40.Pq
eta/c(2980): mass
eta/c(2980): width
charmonium
BES

References(25)

Figures(1)

The New heavy mesons: A Status report

Eric S. Swanson
(
- Pittsburgh U.
)

- Phys.Rept. 429 (2006) 243-305
•
e-Print:
- hep-ph/0601110
•
DOI:
- 10.1016/j.physrep.2006.04.003

Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts

Eberhard Klempt
(
- Serpukhov, IHEP
)
,
Alexander Zaitsev
(
- Serpukhov, IHEP
)

- Phys.Rept. 454 (2007) 1-202
•
e-Print:
- 0708.4016
•
DOI:
- 10.1016/j.physrep.2007.07.006

The Exotic XYZ Charmonium-like Mesons

Stephen Godfrey
(
- Ottawa Carleton Inst. Phys. and
- Carleton U.
)
,
Stephen L. Olsen
(
- Beijing, Inst. High Energy Phys. and
- Hawaii U.
)

- Ann.Rev.Nucl.Part.Sci. 58 (2008) 51-73
•
e-Print:
- 0801.3867
•
DOI:
- 10.1146/annurev.nucl.58.110707.171145

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

Review of particle physics

K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
H. Murayama
(
- LBL, Berkeley and
- UC, Berkeley and
- Tokyo U., IPMU
)
,
M. Tanabashi
(
- Nagoya U.
)

et al.

- J.Phys.G 37 (2010) 075021
•
DOI:
- 10.1088/0954-3899/37/7A/075021

Hadronic Decays of the $\eta_c$ (2980)

Mark-III

Collaboration

•

R.M. Baltrusaitis
(
- Caltech
)

et al.

- Phys.Rev.D 33 (1986) 629
•
DOI:
- 10.1103/PhysRevD.33.629

Measurements of the mass and full width of the eta(c) meson

BES

Collaboration

•

J.Z. Bai

et al.

- Phys.Lett.B 555 (2003) 174-180
•
e-Print:
- hep-ex/0301004
•
DOI:
- 10.1016/S0370-2693(03)00074-1

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

Measurements of the mass and width of the $\eta_c$ meson and of an $\eta_c(2S)$ candidate

BaBar

Collaboration

•

Bernard Aubert
(
- Annecy, LAPP
)

et al.

- Phys.Rev.Lett. 92 (2004) 142002
•
e-Print:
- hep-ex/0311038
•
DOI:
- 10.1103/PhysRevLett.92.142002

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

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

J/psi and psi(2S) Radiative Decays to eta(c)

CLEO

Collaboration

•

R.E. Mitchell
(
- Indiana U.
)

et al.

- Phys.Rev.Lett. 102 (2009) 011801,
- Phys.Rev.Lett. 106 (2011) 159903 (erratum)
•
e-Print:
- 0805.0252
•
DOI:
- 10.1103/PhysRevLett.102.011801

Branching fraction measurements of $\chi_{c0}$ and $\chi_{c2}$ to $\pi^0\pi^0$ and $\eta\eta$

BESIII

Collaboration

•

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

et al.

- Phys.Rev.D 81 (2010) 052005
•
e-Print:
- 1001.5360
•
DOI:
- 10.1103/PhysRevD.81.052005

Design and Construction of the BESIII Detector

BESIII

Collaboration

•

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

et al.

- Nucl.Instrum.Meth.A 614 (2010) 345-399
•
e-Print:
- 0911.4960
•
DOI:
- 10.1016/j.nima.2009.12.050

The Precision Monte Carlo event generator K K for two fermion final states in e+ e- collisions

S. Jadach
(
- DESY and
- Cracow, INP and
- CERN
)
,
B.F.L. Ward
(
- Tennessee U. and
- CERN and
- SLAC
)
,
Z. Was
(
- Cracow, INP and
- CERN
)

- Comput.Phys.Commun. 130 (2000) 260-325
•
e-Print:
- hep-ph/9912214
•
DOI:
- 10.1016/S0010-4655(00)00048-5

Coherent exclusive exponentiation for precision Monte Carlo calculations

S. Jadach
(
- Tennessee U. and
- Cracow, INP
)
,
B.F.L. Ward
(
- Tennessee U.
)
,
Z. Was
(
- Cracow, INP and
- CERN
)

- Phys.Rev.D 63 (2001) 113009
•
e-Print:
- hep-ph/0006359
•
DOI:
- 10.1103/PhysRevD.63.113009

Event generators at BESIII

Rong-Gang Ping
(
- Beijing, Inst. High Energy Phys.
)

- Chin.Phys.C 32 (2008) 599
•
DOI:
- 10.1088/1674-1137/32/8/001

Event generator for J / psi and psi (2S) decay

- Phys.Rev.D 62 (2000) 034003
•
DOI:
- 10.1103/PhysRevD.62.034003

GEANT4 - A Simulation Toolkit

GEANT4

Collaboration

•

S. Agostinelli
(
- Genoa U.
)

et al.

- Nucl.Instrum.Meth.A 506 (2003) 250-303
•
DOI:
- 10.1016/S0168-9002(03)01368-8

A mathematical review on the multiple-solution problem

- Int.J.Mod.Phys.A 26 (2011) 4511-4520
•
e-Print:
- 1108.2760
•
DOI:
- 10.1142/S0217751X11054589

A mathematical review on the multiple-solution problem

- Int.J.Mod.Phys.A 26 (2011) 4511-4520
•
e-Print:
- 1108.2760
•
DOI:
- 10.1142/S0217751X11054589

Quarkonium mass splittings in three-flavor lattice QCD

T. Burch
(
- Utah U.
)
,
C. DeTar
(
- Utah U.
)
,
M. Di Pierro
(
- De Paul U.
)
,
A.X. El-Khadra
(
- Illinois U., Urbana
)
,
E.D. Freeland
(
- Washington U., St. Louis
)

et al.

- Phys.Rev.D 81 (2010) 034508
•
e-Print:
- 0912.2701
•
DOI:
- 10.1103/PhysRevD.81.034508

Charm annihilation effects on the hyperfine splitting in charmonium

L. Levkova
(
- Utah U.
)
,
C. DeTar
(
- Utah U.
)

- Phys.Rev.D 83 (2011) 074504
•
e-Print:
- 1012.1837
•
DOI:
- 10.1103/PhysRevD.83.074504

Charmonium potential from full lattice QCD

Taichi Kawanai
(
- Tokyo U. and
- RIKEN BNL and
- Brookhaven
)
,
Shoichi Sasaki
(
- Tokyo U. and
- RIKEN BNL and
- Brookhaven
)

- Phys.Rev.D 85 (2012) 091503
•
e-Print:
- 1110.0888
•
DOI:
- 10.1103/PhysRevD.85.091503

Hyperfine Interaction in Quarkonia

Kamal K. Seth
(
- Northwestern U.
)

- EPJ Web Conf. 3 (2010) 07006
•
e-Print:
- 0912.2776
•
DOI:
- 10.1051/epjconf/20100307006