Selective experimental review of the Standard Model

Conference · Fri Feb 01 00:00:00 EST 1985

OSTI ID:6117794

Bloom, E D

Before disussing experimental comparisons with the Standard Model, (S-M) it is probably wise to define more completely what is commonly meant by this popular term. This model is a gauge theory of SU(3)/sub f/ x SU(2)/sub L/ x U(1) with 18 parameters. The parameters are ..cap alpha../sub s/, ..cap alpha../sub qed/, theta/sub W/, M/sub W/ (M/sub Z/ = M/sub W//cos theta/sub W/, and thus is not an independent parameter), M/sub Higgs/; the lepton masses, M/sub e/, M..mu.., M/sub r/; the quark masses, M/sub d/, M/sub s/, M/sub b/, and M/sub u/, M/sub c/, M/sub t/; and finally, the quark mixing angles, theta/sub 1/, theta/sub 2/, theta/sub 3/, and the CP violating phase delta. The latter four parameters appear in the quark mixing matrix for the Kobayashi-Maskawa and Maiani forms. Clearly, the present S-M covers an enormous range of physics topics, and the author can only lightly cover a few such topics in this report. The measurement of R/sub hadron/ is fundamental as a test of the running coupling constant ..cap alpha../sub s/ in QCD. The author will discuss a selection of recent precision measurements of R/sub hadron/, as well as some other techniques for measuring ..cap alpha../sub s/. QCD also requires the self interaction of gluons. The search for the three gluon vertex may be practically realized in the clear identification of gluonic mesons. The author will present a limited review of recent progress in the attempt to untangle such mesons from the plethora q anti q states of the same quantum numbers which exist in the same mass range. The electroweak interactions provide some of the strongest evidence supporting the S-M that exists. Given the recent progress in this subfield, and particularly with the discovery of the W and Z bosons at CERN, many recent reviews obviate the need for further discussion in this report. In attempting to validate a theory, one frequently searches for new phenomena which would clearly invalidate it. 49 references, 28 figures.

• Research Organization: Stanford Linear Accelerator Center, CA (USA)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6117794
• Report Number(s): SLAC-PUB-3573; CONF-850146-2; ON: DE85007779; TRN: 85-008311
• Resource Relation: Conference: Aspen winter physics conference, Aspen, CO, USA, 14 Jan 1985
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
STANDARD MODEL
CHARGED CURRENTS
COUPLING CONSTANTS
GLUONS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUARKONIUM
REVIEWS
SUPERSYMMETRY
WEINBERG-SALAM GAUGE MODEL
ALGEBRAIC CURRENTS
CURRENTS
DOCUMENT TYPES
ELEMENTARY PARTICLES
FIELD THEORIES
MATHEMATICAL MODELS
PARTICLE MODELS
QUANTUM FIELD THEORY
SYMMETRY
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
645100* - High Energy Physics- Particle Interactions & Properties-Experimental
645201 - High Energy Physics- Particle Interactions & Properties-Theoretical- General & Scattering Theory