Two photon production of pion pairs in e/sup +/e/sub /minus// collisions at 29 GeV
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 National Lab. (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5762385
- Report Number(s):
- LBL-27180; ON: DE89016310
- Resource Relation:
- Other Information: Thesis (Ph.D.). Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PIONS
PAIR PRODUCTION
ANGULAR DISTRIBUTION
CROSS SECTIONS
ELECTRON-POSITRON INTERACTIONS
EXPERIMENTAL DATA
F2-1270 MESONS
PARTICLE IDENTIFICATION
REST MASS
SCATTERING
TRANSVERSE MOMENTUM
BOSONS
DATA
DISTRIBUTION
ELEMENTARY PARTICLES
HADRONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LINEAR MOMENTUM
MASS
MESONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PSEUDOSCALAR MESONS
TENSOR MESONS
645100* - High Energy Physics- Particle Interactions & Properties-Experimental