title: Measurement of the eta-meson mass using psi(2S) --> etaJ/psi.
abstract: We measure the mass of the eta meson using psi(2S) --> etaJ/psi events acquired with the CLEO-c detector operating at the CESR e(+)e(-) collider. Using the four decay modes eta --> gamma gamma, 3pi(0), pi(+)pi(-)pi(0), and pi(+)pi(-)gamma, we find M(eta) = 547.785 +/- 0.017 +/- 0.057 MeV, in which the first uncertainty is statistical and the second systematic. This result has an uncertainty comparable to the two most precise previous measurements and is consistent with that of NA48, but is inconsistent at the level of 6.5 sigma with the much smaller mass obtained by GEM.
authors.affiliation: Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: D H
authors.initials: DH
authors.lastname: Miller
authors.forename: B
authors.initials: B
authors.lastname: Sanghi
authors.forename: I P J
authors.initials: IP
authors.lastname: Shipsey
authors.forename: B
authors.initials: B
authors.lastname: Xin
authors.forename: G S
authors.initials: GS
authors.lastname: Adams
authors.forename: M
authors.initials: M
authors.lastname: Anderson
authors.forename: J P
authors.initials: JP
authors.lastname: Cummings
authors.forename: I
authors.initials: I
authors.lastname: Danko
authors.forename: J Y
authors.initials: JY
authors.lastname: Ge
authors.forename: D
authors.initials: D
authors.lastname: Hu
authors.forename: B
authors.initials: B
authors.lastname: Moziak
authors.forename: J
authors.initials: J
authors.lastname: Napolitano
authors.forename: Q
authors.initials: Q
authors.lastname: He
authors.forename: J
authors.initials: J
authors.lastname: Insler
authors.forename: H
authors.initials: H
authors.lastname: Muramatsu
authors.forename: C S
authors.initials: CS
authors.lastname: Park
authors.forename: E H
authors.initials: EH
authors.lastname: Thorndike
authors.forename: F
authors.initials: F
authors.lastname: Yang
authors.forename: M
authors.initials: M
authors.lastname: Artuso
authors.forename: S
authors.initials: S
authors.lastname: Blusk
authors.forename: S
authors.initials: S
authors.lastname: Khalil
authors.forename: J
authors.initials: J
authors.lastname: Li
authors.forename: N
authors.initials: N
authors.lastname: Menaa
authors.forename: R
authors.initials: R
authors.lastname: Mountain
authors.forename: S
authors.initials: S
authors.lastname: Nisar
authors.forename: K
authors.initials: K
authors.lastname: Randrianarivony
authors.forename: R
authors.initials: R
authors.lastname: Sia
authors.forename: T
authors.initials: T
authors.lastname: Skwarnicki
authors.forename: S
authors.initials: S
authors.lastname: Stone
authors.forename: J C
authors.initials: JC
authors.lastname: Wang
authors.forename: G
authors.initials: G
authors.lastname: Bonvicini
authors.forename: D
authors.initials: D
authors.lastname: Cinabro
authors.forename: M
authors.initials: M
authors.lastname: Dubrovin
authors.forename: A
authors.initials: A
authors.lastname: Lincoln
authors.forename: D M
authors.initials: DM
authors.lastname: Asner
authors.forename: K W
authors.initials: KW
authors.lastname: Edwards
authors.forename: P
authors.initials: P
authors.lastname: Naik
authors.forename: R A
authors.initials: RA
authors.lastname: Briere
authors.forename: T
authors.initials: T
authors.lastname: Ferguson
authors.forename: G
authors.initials: G
authors.lastname: Tatishvili
authors.forename: H
authors.initials: H
authors.lastname: Vogel
authors.forename: M E
authors.initials: ME
authors.lastname: Watkins
authors.forename: J L
authors.initials: JL
authors.lastname: Rosner
authors.forename: N E
authors.initials: NE
authors.lastname: Adam
authors.forename: J P
authors.initials: JP
authors.lastname: Alexander
authors.forename: D G
authors.initials: DG
authors.lastname: Cassel
authors.forename: J E
authors.initials: JE
authors.lastname: Duboscq
authors.forename: R
authors.initials: R
authors.lastname: Ehrlich
authors.forename: L
authors.initials: L
authors.lastname: Fields
authors.forename: L
authors.initials: L
authors.lastname: Gibbons
authors.forename: R
authors.initials: R
authors.lastname: Gray
authors.forename: S W
authors.initials: SW
authors.lastname: Gray
authors.forename: D L
authors.initials: DL
authors.lastname: Hartill
authors.forename: B K
authors.initials: BK
authors.lastname: Heltsley
authors.forename: D
authors.initials: D
authors.lastname: Hertz
authors.forename: C D
authors.initials: CD
authors.lastname: Jones
authors.forename: J
authors.initials: J
authors.lastname: Kandaswamy
authors.forename: D L
authors.initials: DL
authors.lastname: Kreinick
authors.forename: V E
authors.initials: VE
authors.lastname: Kuznetsov
authors.forename: H
authors.initials: H
authors.lastname: Mahlke-Krüger
authors.forename: D
authors.initials: D
authors.lastname: Mohapatra
authors.forename: P U E
authors.initials: PU
authors.lastname: Onyisi
authors.forename: J R
authors.initials: JR
authors.lastname: Patterson
authors.forename: D
authors.initials: D
authors.lastname: Peterson
authors.forename: D
authors.initials: D
authors.lastname: Riley
authors.forename: A
authors.initials: A
authors.lastname: Ryd
authors.forename: A J
authors.initials: AJ
authors.lastname: Sadoff
authors.forename: X
authors.initials: X
authors.lastname: Shi
authors.forename: S
authors.initials: S
authors.lastname: Stroiney
authors.forename: W M
authors.initials: WM
authors.lastname: Sun
authors.forename: T
authors.initials: T
authors.lastname: Wilksen
authors.forename: S B
authors.initials: SB
authors.lastname: Athar
authors.forename: R
authors.initials: R
authors.lastname: Patel
authors.forename: J
authors.initials: J
authors.lastname: Yelton
authors.forename: P
authors.initials: P
authors.lastname: Rubin
authors.forename: B I
authors.initials: BI
authors.lastname: Eisenstein
authors.forename: I
authors.initials: I
authors.lastname: Karliner
authors.forename: N
authors.initials: N
authors.lastname: Lowrey
authors.forename: M
authors.initials: M
authors.lastname: Selen
authors.forename: E J
authors.initials: EJ
authors.lastname: White
authors.forename: J
authors.initials: J
authors.lastname: Wiss
authors.forename: R E
authors.initials: RE
authors.lastname: Mitchell
authors.forename: M R
authors.initials: MR
authors.lastname: Shepherd
authors.forename: D
authors.initials: D
authors.lastname: Besson
authors.forename: T K
authors.initials: TK
authors.lastname: Pedlar
authors.forename: D
authors.initials: D
authors.lastname: Cronin-Hennessy
authors.forename: K Y
authors.initials: KY
authors.lastname: Gao
authors.forename: J
authors.initials: J
authors.lastname: Hietala
authors.forename: Y
authors.initials: Y
authors.lastname: Kubota
authors.forename: T
authors.initials: T
authors.lastname: Klein
authors.forename: B W
authors.initials: BW
authors.lastname: Lang
authors.forename: R
authors.initials: R
authors.lastname: Poling
authors.forename: A W
authors.initials: AW
authors.lastname: Scott
authors.forename: P
authors.initials: P
authors.lastname: Zweber
authors.forename: S
authors.initials: S
authors.lastname: Dobbs
authors.forename: Z
authors.initials: Z
authors.lastname: Metreveli
authors.forename: K K
authors.initials: KK
authors.lastname: Seth
authors.forename: A
authors.initials: A
authors.lastname: Tomaradze
authors.forename: J
authors.initials: J
authors.lastname: Ernst
authors.forename: K M
authors.initials: KM
authors.lastname: Ecklund
authors.forename: H
authors.initials: H
authors.lastname: Severini
authors.forename: W
authors.initials: W
authors.lastname: Love
authors.forename: V
authors.initials: V
authors.lastname: Savinov
authors.forename: A
authors.initials: A
authors.lastname: Lopez
authors.forename: S
authors.initials: S
authors.lastname: Mehrabyan
authors.forename: H
authors.initials: H
authors.lastname: Mendez
authors.forename: J
authors.initials: J
authors.lastname: Ramirez