Test of QED to fourth order by study of four-lepton final states in e sup + e sup minus interactions at 29 GeV with the HRS detector

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.2180· OSTI ID:6227623

Petradza, M; Akerlof, C; Chapman, J; Errede, D; Ken, M T; Meyer, D I; Neal, H; Nitz, D; Thun, R; Tschirhart, R ^[1]; Abachi, S; Derrick, M; Kooijman, P; Price, L E; Repond, J; Sugano, K ^[2]; Cork, B ^[3]; Blockus, D; Brabson, B; Brom, J M ; Jung, C; Ogren, H; Rust, D R ^[4]; Baringer, P; Bylsma, B G; DeBonte, R; Koltick, D; Low, E H; McIlwain, R L; Miller, D H; Ng, C R; Shibata, E I ^[5]

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1. University of Michigan, Ann Arbor, MI (USA)
2. Argonne National Laboratory, Argonne, IL (USA)
3. Lawrence Berkeley Laboratory, Berkeley, CA (USA)
4. Indiana University, Bloomington, IN (USA)
5. Purdue University, West Lafayette, IN (USA)

Data taken with the High Resolution Spectrometer detector at the SLAC storage ring PEP were used to test QED to fourth order in the coupling constant {alpha}. The experiment studied four-lepton final states produced at high {ital Q}{sup 2} in {ital e}{sup +}{ital e}{sup {minus}} interactions at {radical}{ital s} =29 GeV. All four final-state particles were detected at large angles with respect to the beam axis. We observed 17 {ital e}{sup +}{ital e}{sup {minus}}{ital e+}{ital e}{sup {minus}}, 24 {ital e}{sup +}{ital e}{sup {minus}}{mu}{sup +}{mu}{sup {minus}}, and 1 {mu}{sup +}{mu}{sup {minus}}{mu}{sup +}{mu}{sup {minus}} events with pair masses greater than 1 GeV/{ital c}{sup 2} for an integrated luminosity of 291 pb{sup {minus}1}. The complete {alpha}{sup 4} QED calculation agrees reasonably well with the data.

• DOE Contract Number: AC02-84ER40125
• OSTI ID: 6227623
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:7; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BHABHA SCATTERING
COUPLING CONSTANTS
DRIFT CHAMBERS
ELASTIC SCATTERING
ELECTRODYNAMICS
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
GEV RANGE
GEV RANGE 10-100
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTONS
MEASURING INSTRUMENTS
MONTE CARLO METHOD
MULTIWIRE PROPORTIONAL CHAMBERS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PEP STORAGE RINGS
PROPORTIONAL COUNTERS
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
RADIATION DETECTORS
SCATTERING
STORAGE RINGS
TESTING