I=0 C=+1 mesons from 1920 to 2410 MeV

Autor: H.C. Lu, V.A. Nikonov, C.J. Batty, A. V. Sarantsev, D.V. Bugg, A. V. Anisovich, C. Hodd, V.V. Sarantsev, C.A. Baker, B.S. Zou
Rok vydání: 2000
Předmět:
Zdroj: Physics Letters B. 491:47-58
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(00)01018-2
Popis: A combined fit is presented to data on pbar-p annihilation in flight to final states eta-pizero-pizero, pizero-pizero, eta-eta, eta-etaprime and piminus-piplus. The emphasis lies in improving an earlier study of eta-pizero-pizero by fitting data at nine pbar momenta simultaneously and with parameters consistent with the two-body channels. There is evidence for all of the I=0, C=+ q-qbar states expected in this mass range. New resonances are reported with masses and widths M,Gamma as follows: JPC = 4^{-+} (2328+-38, Gamma=240+-90) MeV, 1^{++} (1971+-15, 240+-45) MeV, 0^{-+} (2285+-20, 325+-30) MeV, and 0^{-+} (2010 ^{+35}_{-60}, 270+-60) MeV. Errors on the masses and widths of other resonances are also reduced substantially. All states lie close to parallel straight line trajectories of excitation number v. mass squared.
Comment: 13 pages, 5 figures, pdflatex
Databáze: OpenAIRE
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