Observation of the {eta}(1295) and {eta}(1440) produced in the reaction {pi}{sup -}p{yields}{eta}{pi}{sup +}{pi}{sup -}n at 18 Gev/c

Journal Article · Fri May 29 04:00:00 EDT 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.56009· OSTI ID:21199072

Manak, Joseph J ^[1]

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1. Thomas Jefferson National Accelerator Laboratory, Newport News, Virginia, 23606 (United States)

A partial-wave analysis of 9082 {eta}{pi}{sup +}{pi}{sup -}n events produced in the reaction {pi}{sup -}p{yields}{eta}{pi}{sup +}{pi}{sup -}n at 18.3 Gev/c has been carried out using data from experiment E852 at Brookhaven National Laboratory. The data is dominated by J{sup PC}=0{sup -+} partial waves consistent with observation of the {eta}(1295) and the {eta}(1440). The mass and width of the {eta}(1295) was determined to be 1282{+-}5 MeV and 66{+-}13 MeV respectively while the {eta}(1440) was observed with a mass of 1404{+-}6 MeV and a width of 80{+-}21 MeV. Other partial waves of importance include the 1{sup ++} and the 1{sup +-} waves. Results of the partial wave analysis are combined with results of other experiments to estimate f{sub 1}(1285) branching fractions. These values are considerably different from current values determined without the aid of amplitude analyses.

• OSTI ID: 21199072
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 432; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
ETA-1295 MESONS
ETA-1440 MESONS
F1-1285 MESONS
GEV RANGE
MEV RANGE
NEUTRONS
PARTIAL WAVES
PARTICLE PRODUCTION
PARTICLE WIDTHS
PION-PROTON INTERACTIONS
PIONS MINUS
PIONS PLUS
RESONANCE PARTICLES
REST MASS