OBSERVATION OF A SCALAR RESONANCE DECAYING TO PI-PI-0-PI-0 IN (P)OVER-BAR-P ANNIHILATION AT REST(PI)

Authors
AMSLER C ARMSTRONG DS AUGUSTIN I BAKER CA BARNETT BM BATTY CJ BEUCHERT K BIRIEN P BLUM P BOSSINGHAM R BRAUNE K BROSE J BUGG DV BURCHELL M CASE T COOPER A CROWE KM DEGENER T DIETZ HP VONDOMBROWSKI S DOSER M DUNNWEBER W ENGELHARDT D ENGLERT M FAESSLER MA FELIX C FOLGER G HACKMANN R HADDOCK RP HEINSIUS FH HESSEY NP HIDAS P ILLINGER P JAMNIK D JAVORFI Z KALINOWSKY H KAMMLE B KIEL T KISIEL J KLEMPT E KOBEL M KOCH H KOLO C KONIGSMANN K KUNZE M LANDUA R LUDEMANN J MATTHAY H MERKEL M MERLO JP MEYER CA MONTANET L NOBLE A OULDSAADA F PETERS K PINDER CN PINTER G RAVNDAL S SALK J SANJARI AH SCHAFER E SCHMID B SCHMIDT P SPANIER S STRASSBURGER C STROHBUSCH U SUFFERT M URNER D VOLCKER C WALTER F WALTHER D WIEDNER U WINTER N ZOLL J ZOU B ZUPANCIC C
Citation
C. Amsler et al., OBSERVATION OF A SCALAR RESONANCE DECAYING TO PI-PI-0-PI-0 IN (P)OVER-BAR-P ANNIHILATION AT REST(PI), Physics letters. Section B, 322(4), 1994, pp. 431-440
Citations number
31
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
322
Issue
4
Year of publication
1994
Pages
431 - 440
Database
ISI
SICI code
0370-2693(1994)322:4<431:OOASRD>2.0.ZU;2-A
Abstract
We report an analysis of ppBAR annihilation at rest in to rho+rho-pi0 leading to the final state pi+pi-3pi0. A strong signal is observed for a scalar resonance with mass 1374 +/- 38 MeV/c2 and width 375 +/- 61 MeV/c2, decaying to rho+rho-. The resonance in rho+rho- represents 2.0 +/- 0.3% of all ppBAR annihilations at rest. It is also observed to d ecay into two S-wave dipions (pi+pi-)(pi0pi0). Under the assumption of isospin 0, this is probably f0(1400), seen for the first time in its 4pi decay mode.