CP violation

Journal Article · Fri May 01 04:00:00 EDT 1981 · AIP Conf. Proc.; (United States)

DOI:https://doi.org/10.1063/1.33015· OSTI ID:6149474

Wolfenstein, L

Talks on CP violation have a tendency to seem the same every year. The subject is one on which the progress is somewhat limited. The first table has been the first table for a long time. It says that, from a phenomenological point of view, one can discuss three kinds of CP violation. It think this table first appeared in the paper T. D. Lee and I wrote in 1965. We can classify the different kinds of CP violation according to their different selection rules with respect to strangeness change, 0, 1 or 2. In particular we will emphasize the one and two, one being called milliweak of strength of order 10/sup -3/ weak, and two being superweak which is very weak, because it allows at tree level ..delta..S = 2. The experimental consequences of superweak are well known; so far, they have turned out to be in agreement with what has been found. The best chances to find effects that are contrary to superweak in experiments now going on are: (1) the electric dipole moment of the neutron, for which the limit now is something like 10/sup -24/ e-cm, and for which an experiment now in progress hopes to get down to 10/sup -26/ and perhaps lower; (2) the famous eta/sub 00//eta/sub +/- parameter (really magnitude), which is the ratio of the CP forbidden ..pi../sup 0/..pi../sup 0/ mode to the forbidden ..pi../sup +/..pi../sup -/ mode. The deviation of Vertical Bareta/sub 00//eta/sub +/-Vertical Bar from unity is now known to be less than 6%. Two experiments, one by Cronin and collaborators and one by Adair and his collaborators, hope to see this at a level of 1%, if it exists.

• Research Organization: Carnegie-Mellon Univ., Pittsburgh, Pennsylvania
• OSTI ID: 6149474
• Report Number(s): CONF-801244-
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 72:1; ISSN APCPC
• Country of Publication: United States
• Language: English

Related Subjects

645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
645400 -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BEAUTY MODEL
COMPOSITE MODELS
CP INVARIANCE
ELEMENTARY PARTICLES
FIELD THEORIES
FLAVOR MODEL
HIGGS MODEL
INTERACTIONS
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SELECTION RULES
STRANGENESS
UNIFIED GAUGE MODELS
WEAK INTERACTIONS