Two photon production of pion pairs in e/sup +/e/sub /minus// collisions at 29 GeV

Technical Report · Mon May 01 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/5762385· OSTI ID:5762385

Boyer, J H

We present a new measurement of the cross section for the process e/sup +/e/sup /minus// /yields/ e/sup +/e/sup /minus///pi//sup +//pi//sup /minus// at center-of-mass energy 29 GeV for invariant pion pair masses M/sub /phi//phi// between 350 MeV/c/sup 2/ and 3.5 GeV/c/sup 2/. For M/sub /pi//pi// above 2.1 GeV/c/sup 2/, we find approximate agreement with the hard-scattering prediction of Brodsky and Lepage. In the low mass region, we observe the f/sub 2/(1270), and measure its radiative width to be 3.15 /plus minus/ .04 /plus minus/ .39 keV. We also observe an enhancement in the /pi//sup +//pi//sup /minus// spectrum near 1 GeV. We hypothesize that it is the f/sub 0/(975) and determine it's radiative width to be 0.29 /plus minus/ .07 /plus minus/ .12 keV. 48 refs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5762385
• Report Number(s): LBL-27180; ON: DE89016310
• Country of Publication: United States
• Language: English

Related Subjects

645100* -- High Energy Physics-- Particle Interactions & Properties-Experimental
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BOSONS
CROSS SECTIONS
DATA
DISTRIBUTION
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
F2-1270 MESONS
HADRONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LINEAR MOMENTUM
MASS
MESONS
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE IDENTIFICATION
PARTICLE INTERACTIONS
PIONS
PSEUDOSCALAR MESONS
REST MASS
SCATTERING
TENSOR MESONS
TRANSVERSE MOMENTUM