Measurements of the reactione+e−→γγat center-of-mass energies in the range 6.2-7.4 GeV

.. ..gamma gamma.. at angles close to 90degree, relative to Bhabha scattering at 4degree, are reported at center-of-mass energies in the range 6.2--7.4 GeV. These measurements provide a fundamental test of quantum electrodynamics (QED) for spacelike values of the invariant four-momentum transfer q/sup 2/ as high at -40 (GeV/c)/sup 2/, which in this reaction is carried by the lepton propagator. A principal feature of the detection apparatus is the use of large NaI(Tl) total-absorption spectrometers. The results are in agreement with the predictions of QED. -->
ISSN: 0556-2821
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=doi_________::680dc5a16ff6743b35d58a63d8a129e9
https://doi.org/10.1103/physrevd.15.1809
Rights: CLOSED
Přírůstkové číslo: edsair.doi...........680dc5a16ff6743b35d58a63d8a129e9
Autor: B. L. Beron, E. Hilger, A.D. Liberman, E. B. Hughes, R.L. Carrington, R. L. Ford, J.W. Simpson, R. Hofstadter, L.H. O'Neill, T. W. Martin, L.K. Resvanis, W. T. Hill
Rok vydání: 1977
Předmět:
Zdroj: Physical Review D. 15:1809-1813
ISSN: 0556-2821
Popis: Measurements of the cross section for the pair-annihilation reaction e/sup +/e/sup -/ ..-->.. ..gamma gamma.. at angles close to 90degree, relative to Bhabha scattering at 4degree, are reported at center-of-mass energies in the range 6.2--7.4 GeV. These measurements provide a fundamental test of quantum electrodynamics (QED) for spacelike values of the invariant four-momentum transfer q/sup 2/ as high at -40 (GeV/c)/sup 2/, which in this reaction is carried by the lepton propagator. A principal feature of the detection apparatus is the use of large NaI(Tl) total-absorption spectrometers. The results are in agreement with the predictions of QED.
Databáze: OpenAIRE
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