CP violation in the decay K sub L r arrow. pi. sup +. pi. sup minus e+ e minus

Journal Article · Sat Aug 01 00:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.1035· OSTI ID:7035729

Sehgal, L M ^[1]; Wanninger, M ^[2]

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1. Institut fuer Theoretische Physik (E), Physikzentrum Rheinisch-Westfaelische Technische Hochschule Aachen, Sommerfeldstrasse, D-5100 Aachen (Germany)
2. Institut fuer Theoretische Physik, Universitaet Heidelberg, Philosophenweg 16, D-6900 Heidelberg (Germany)

We have calculated the distribution {ital d}{Gamma}/{ital d}{phi} for the decay {ital K}{sub {ital L}}{r arrow}{pi}{sup +}{pi}{sup {minus}}{ital e+}{ital e{minus}}, where {phi} is the angle between the vectors normal to the {pi}{sup +}{pi}{sup {minus}} and {ital e}{sup +}{ital e{minus}} planes. The result can be written in the form {ital d}{Gamma}/{ital d}{phi}={Gamma}{sub 1}cos{sup 2}{phi}+{Gamma}{sub 2}sin{sup 2}{phi}+{Gamma}{sub 3}sin{phi} cos{phi}, where the last term is {ital CP} violating and involves the interference of the {ital M}1 component of {ital K}{sub {ital L}}{r arrow}{pi}{sup +}{pi}{sup {minus}}{gamma} with the bremsstrahlung component as well as a possible direct {ital E}1 component. Using data on the radiative decays {ital K}{sub {ital L},}{ital S}{r arrow}{pi}{sup +}{pi}{sup {minus}}{gamma}, we estimate an asymmetry in the {phi} distribution of (3.8{plus minus}1.4)%.

• OSTI ID: 7035729
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:3; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120* -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662350 -- Decays of Mesons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR CORRELATION
ASYMMETRY
BOSONS
BRANCHING RATIO
BREMSSTRAHLUNG
CORRELATIONS
CP INVARIANCE
DECAY
E1-TRANSITIONS
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
FERMIONS
FORM FACTORS
HADRONS
INTERACTIONS
INVARIANCE PRINCIPLES
KAONS
LEPTONS
M1-TRANSITIONS
MASSLESS PARTICLES
MATRIX ELEMENTS
MESONS
MULTIPOLE TRANSITIONS
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHOTONS
PIONS
PROPAGATOR
PSEUDOSCALAR MESONS
RADIATIONS
RADIATIVE DECAY
STRANGE MESONS
STRANGE PARTICLES