Interference of u u and d d final states in electron-positron annihilation and Z sup 0 decay

Journal Article · Mon Jun 11 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.2874· OSTI ID:6760477

Sehgal, L M; Heiliger, P ^[1]

---

1. III. Physikalisches Institut, Technische Hochschule, Aachen (West Germany)

Assuming the reactions {ital e}{sup +}{ital e}{sup {minus}}{r arrow}{ital u{bar u}},{ital d{bar d}} to produce final states consisting of pions only, we consider effects that are sensitive to the coherence of the {ital u{bar u}} and {ital d{bar d}} systems. The ratio of odd- and even-multiplicity final states varies from 1/9 at low energies to 3.5 on the {ital Z}{sup 0}. For left-handed electrons, this ratio is as high as 400 in the region around {radical}{ital s} =75 GeV. There is a {pi}{sup +}-{pi}{sup {minus}} asymmetry (22% on the {ital Z}{sup 0}) for odd-multiplicity configurations, but none for even multiplicity. These features are absent in models in which the {ital u{bar u}} and {ital d{bar d}} systems fragment independently.

• OSTI ID: 6760477
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:24; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
DECAY
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRONIC PARTICLE DECAY
INTERACTIONS
INTERFERENCE
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON-LEPTON INTERACTIONS
PARTICLE DECAY
PARTICLE INTERACTIONS
POSTULATED PARTICLES
QUARKS
Z NEUTRAL BOSONS