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

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6094510

Boyer, J H

The author presents 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 {pi}{pi}} between 350 MeV/c{sup 2} and 3.5 GeV/c{sup 2}. For M{sub {pi}{pi}} above 2.1 GeV/c 2, he finds approximate agreement with the hard-scattering prediction of Brodsky and Lepage. In the low mass region, he observes the f{sub 2} (1270), and measure its radiative width to be 3.15 {plus minus} .04 {plus minus} .39 keV. He 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 its radiative width to be 0.29 {plus minus} .07 {plus minus} .12 keV.

• Research Organization: California Univ., Berkeley, CA (USA)
• OSTI ID: 6094510
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
HADRONS
INFORMATION
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MASS
MESONS
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE WIDTHS
PHOTOPRODUCTION
PIONS
PSEUDOSCALAR MESONS