Exclusive production of hadron pairs at large momentum transfer in photon-photon interactions

Ch. Berger,A. Deuter,H. Genzel,W. Lackas,J. Pielorz,Frank Raupach,Wolfgang Wagner,A. Klovning,E. Lillestöl,J.M. Olsen,J.D. Burger,L. Criegee,F. Ferrarotto,G. Franke,M. Gaspero,Ch. Gerke,G. Knies,B. Lewendel,J. Meyer,U. Michelsen,K. H. Pape,B. Stella,U. Timm,G.-G. Winter,M. Zachara,W. Zimmermann,P.J. Bussey,S.L. Cartwright,J.B. Dainton,B.T. King,C. Raine,J.M. Scarr,I.O. Skillicorn,K.M. Smith,J.C. Thomson,O. Achterberg,V. Blobel,D. Burkart,K. Diehlmann,M. Feindt,H. Kapitza,B. Koppitz,M. Krüger,M. Poppe,H. Spitzer,R. van Staa,C. Y. Chang,R. G. Glasser,R. G. Kellogg,S. J. Maxfield,R. O. Polvado,B. Sechi-Zorn,J. A. J. Skard,A. Skuja,A. J. Tylka,G. Welch,G. T. Zorn,F. Almeida,A. Bäcker,F. Barreiro,S. Brandt,K Derikum,C. Grupen,H. Meyer,H. Müller,B. Neumann,M Rost,K. Stupperich,G. Zech,G. Alexander,G. Bella,Y. Gnat,J. Grunhaus,H. J. Daum,H Junge,K. Kraski,C. Maxeiner,H Maxeiner,H. Meyer,D. Schmidt

Exclusive production of hadron pairs at large momentum transfer in photon-photon interactions

1984

Abstract We report on the exclusive production of π, K and proton pairs from photon-photon interactions at momentum transfers | t |⩾1 GeV 2 . Using the PLUTO detector at the e + e − storage ring PETRA, we have observed 15 events in an integrated luminosity of 41.7 pb −1 . The data lie far below the expectations for point-like hadrons, and are in reasonable agreement with the QCD-based predictions of Brodsky and Lepage.

Keywords:

Momentum transfer
Quantum chromodynamics
Hadron
Storage ring
Proton
Photon
Particle physics
Momentum
Physics
PLUTO detector
Nuclear physics
Luminosity

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