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Direct and indirect [ital CP] violation in the decay [ital K][sub [ital L]][r arrow][pi][sup +][pi][sup [minus]][ital e+][ital e[minus]]

Journal Article · · Physical Review, D (Particles Fields); (United States)
 [1];  [2]
  1. III. Physikalisches Institut (A), Rheinisch-Westfaelische Technische Hochschule Aachen, D-5100 Aachen (Germany)
  2. Institut fuer Theoretische Physik (E), Rheinisch-Westfaelische Technische Hochschule Aachen, D-5100 Aachen (Germany)
+ Show Author Affiliations

The decay [ital K][sub [ital L]][r arrow][pi][sup +][pi][sup [minus]][ital e+][ital e[minus]] is analyzed in a model containing (i) a [ital CP]-conserving amplitude associated with the [ital M]1 transition in [ital K][sub [ital L]][r arrow][pi][sup +][pi][sup [minus]][gamma], (ii) an indirect [ital CP]-violating amplitude related to the bremsstrahlung part of [ital K][sub [ital L]][r arrow][pi][sup +][pi][sup [minus]][gamma], and (iii) a direct [ital CP]-violating term associated with the short-distance interaction [ital s[bar d]][r arrow][ital e][sup +][ital e[minus]]. Interference of the first two components produces a large [ital CP]-violating asymmetry ([similar to]14%) in the distribution of the angle [Phi] between the [ital e][sup +][ital e[minus]] and [pi][sup +][pi][sup [minus]] planes. The full angular distribution contains two further [ital CP]-violating observables. Effects of direct [ital CP] violation are found to be numerically small.

OSTI ID:
5970385
Journal Information:
Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:9; ISSN PRVDAQ; ISSN 0556-2821
Country of Publication:
United States
Language:
English

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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 DISTRIBUTION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ASYMMETRY
BOSONS
BREMSSTRAHLUNG
CP INVARIANCE
DECAY
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
FERMIONS
HADRONS
INVARIANCE PRINCIPLES
KAONS
KAONS NEUTRAL
KAONS NEUTRAL LONG-LIVED
LEPTONS
M1-TRANSITIONS
MATTER
MESONS
MULTIPOLE TRANSITIONS
PARTICLE DECAY
PIONS
PIONS MINUS
PIONS PLUS
POSITRONS
PSEUDOSCALAR MESONS
RADIATIONS
STRANGE MESONS
STRANGE PARTICLES
VIOLATIONS