Analysis of (p)over-bar-p->pi(0)pi(0)pi(0)eta for annihilation at rest in liquid and gaseous hydrogen targets

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Pinder, CN
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O412 [相对论、场论]; O572.2 [粒子物理学];
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Resonances decaying to eta pi(0) pi(0) have quantum numbers (J(PC)) 0(-+), 1(++), 2(-+) and 2(++). 2(++) resonances are accessible from S-wave with L = 2, but all others are only accessible via annihilation at rest occurring from P-waves. Crystal Barrel data on <(p)over bar p> --> eta pi(0) pi(0) pi(0) annihilating at rest in liquid hydrogen and gaseous hydrogen targets, the latter possessing a larger P-wave annihilation fraction, has been utilized to reveal confirmatory evidence for a I = 0 J(PC) = 2(-+) resonance in eta pi pi. This resonance has mass 1645 +/- 30 MeV with width 160 +/- 45 MeV, and decays to a(2)(1320)pi with L = 0. It may be interpreted as the <(q)over bar q>(-1) D-2 partner of pi(2)(1670). A partial wave analysis of both gas and liquid target data requires the f(1)(1285), eta(1400) and the eta(2)(1645) --> alpha(2)(1320)pi(0). The branching ratio (Br[X --> a(0))(980)pi(0)]/Br[X --> eta(pi(0) pi(0))(s-wave)]) was estimated for f(1)(1285) and eta(1400) decays. An investigation of the use of the Flatte and Breit-Wigner forms for the a(0)(980) propagator was performed where the Flatte form eliminates a requirement for f(1)(1510) which is present in the Breit-Wigner approach. An attempt has been made to elicit the contributions to the f(1)(1285) peak from combinations of P-3(2), P-3(1) and P-3(0) <(p)over bar p> initial states.
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页码:154 / 159
页数:6
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  • [11] EVIDENCE FOR AXIAL-VECTOR AND PSEUDOSCALAR RESONANCES NEAR 1.275-GEV IN ETA-PI+PI-
    STANTON, NR
    BROCKMAN, P
    DANKOWYCH, JA
    EDWARDS, KW
    GANDSMAN, J
    LEGACEY, D
    LONGACRE, RS
    MARTIN, JF
    PATEL, PM
    PAWLICKI, AJ
    PRENTICE, JD
    SHABAZIAN, E
    YOON, TS
    ZANFINO, C
    [J]. PHYSICAL REVIEW LETTERS, 1979, 42 (06) : 346 - 349
  • [12] IS F(0)(975) A NARROW RESONANCE
    ZOU, BS
    BUGG, DV
    [J]. PHYSICAL REVIEW D, 1993, 48 (09) : R3948 - R3952