QS an transverse momentum dependence of jet production in photon-photon interactions

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6285551

Tylka, A J

An experimental study of jet production in photon-photon interactions is presented. The study is based on events collected with the PLUTO detector at the e e storage ring PETRA. The data sample, which corresponds to an integrated luminosity of approx.40 pb taken at an e e center-of-mass energy of 34.6 GeV, consists of 1226 events in the so-called ''single-tagged'' mode, in which only one of the scattered beam electrons is detected. The data sample extends over the kinematic ranges 0.1 less than or equal to QS less than or equal to 18.0 GeVS, where -QS is the squared invariant mass of the tagged virtual photon, and jet transverse momentum (p/sub T/) up to approx.5 GeV/c, where p/sub T/ is measured with respect to the photon-photon collision axis in the center-of-mass frame of the observed hadrons. At all QS the data show a high p/sub T/ tail characteristic of hard, point-like interactions, as exemplified by the fundamental reaction of elel q anti-q. The jet production cross-section approaches the standard Quark Parton Model (QPM) expectation for fractionally-charged quarks of three colors from above as either QS or jet p/sub T/ increases. At QS > 10 GeVS the observed cross-section is consistent with the standard QPM to within approx.20% statistical uncertainty at all values of p/sub T/. This result rules out the naive Han-Nambu integrally-charged quark model at a level of about five standard deviations.

• Research Organization: Maryland Univ., College Park (USA)
• OSTI ID: 6285551
• 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
ANNIHILATION
BASIC INTERACTIONS
COMPOSITE MODELS
CROSS SECTIONS
DATA
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 10-100
HADRONS
INFORMATION
INTERACTIONS
JET MODEL
LEPTON-LEPTON INTERACTIONS
LINEAR MOMENTUM
MATHEMATICAL MODELS
MULTIPLE PRODUCTION
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTON MODEL
PETRA STORAGE RING
PHOTON-PHOTON INTERACTIONS
Q-VALUE
QUARK MODEL
STORAGE RINGS
TRANSVERSE MOMENTUM