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

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

2011-09-05

arxiv.org/abs/1109.0883v1

Phys. Lett. B 491, 47 (2000)

Physics

High Energy Physics

High Energy Physics - Experiment

13 pages, 5 figures, pdflatex

Scientific paper

10.1016/S0370-2693(00)01018-2

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.

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