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

Conference · Fri Jan 31 23:00:00 EST 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5518850

Sehgal, L M ^[1]

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1. Institut fuer Theoretische Physik (E), Rheinisch-Westfaelische Technische Hochschule, D-5100 Aachen (Germany)

The decay [ital K][sub [ital L]][r arrow][pi][sup +][pi][sup [minus]][ital e][sup +][ital e][sup [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 component of [ital K][sub [ital L]][r arrow][pi][sup +][pi][sup [minus]][gamma], and (iii) a direct [ital CP]-violating term related to the short distance interaction [ital s[bar d]][r arrow][ital e][sup +][ital e][sup [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][sup [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 estimated to be small.

• OSTI ID: 5518850
• Report Number(s): CONF-920837--
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Vol. 272:1; ISSN 0094-243X; ISSN APCPCS
• 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 DISTRIBUTION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ASYMMETRY
BOSONS
BRANCHING RATIO
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
SEMILEPTONIC DECAY
STRANGE MESONS
STRANGE PARTICLES
WEAK PARTICLE DECAY