@article{4aae9d2431a4417b84dca0d6a43526a4,
title = "First measurement of Z/γ* production in Compton scattering of quasi-real photons",
abstract = "We report the first observation of Z/γ* production in Compton scattering of quasi-real photons. This is a subprocess of the reaction e+e-→ e+e-Z/γ*, where one of the final state electrons is undetected. Approximately 55pb-1 of data collected in the year 1997 at an e+e- centre-of-mass energy of 183 GeV with the OPAL detector at LEP have been analysed. The Z/γ* from Compton scattering has been detected in the hadronic decay channel. Within well defined kinematic bounds, we measure the product of cross-section and Z/γ* branching ratio to hadrons to be (0.9 ± 0.3 ± 0.1) pb for events with a hadronic mass larger than 60 GeV, dominated by (e)eZ production. In the hadronic mass region between 5 GeV and 60 GeV, dominated by (e)eγ* production, this product is found to be (4.1 ± 1.6 ± 0.6) pb. Our results agree with the predictions of two Monte Carlo event generators, grc4f and PYTHIA.",
author = "{OPAL Collaboration} and G. Abbiendi and K. Ackerstaff and G. Alexander and J. Allison and N. Altekamp and Anderson, {K. J.} and S. Anderson and S. Arcelli and S. Asai and Ashby, {S. F.} and D. Axen and G. Azuelos and Ball, {A. H.} and E. Barberio and Barlow, {R. J.} and R. Bartoldus and Batley, {J. R.} and S. Baumann and J. Bechtluft and T. Behnke and Bell, {K. W.} and G. Bella and A. Bellerive and S. Bentvelsen and S. Bethke and S. Betts and O. Biebel and A. Biguzzi and Bird, {S. D.} and V. Blobel and Bloodworth, {I. J.} and M. Bobinski and P. Bock and J. Bohme and D. Bonacorsi and M. Boutemeur and S. Braibant and P. Bright-Thomas and L. Brigliadori and Brown, {R. M.} and Burckhart, {H. J.} and C. Burgard and R. B{\"u}rgin and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and Charlton, {D. G.} and R. Folman",
note = "Funding Information: In addition to the support staff at our own institutions we are pleased to acknowledge the Department of Energy, USA; National Science Foundation, USA; Particle Physics and Astronomy Research Council, UK; Natural Sciences and Engineering Research Council, Canada; Israel Science Foundation, administered by the Israel Academy of Science and Humanities; Minerva Gesellschaft; Benoziyo Center for High Energy Physics; Japanese Ministry of Education, Science and Culture (the Monbusho) and a grant under the Monbusho International Science Research Program; German Israeli Bi-national Science Foundation (GIF); Bundesministerium f{\"u}r Bildung, Wissenschaft, Forschung und Technologie, Germany; National Research Council of Canada; Research Corporation, USA; Hungarian Foundation for Scientific Research, OTKA T-016660, T023793 and OTKA F-023259.",
year = "1998",
month = oct,
day = "22",
doi = "10.1016/S0370-2693(98)01140-X",
language = "English",
volume = "438",
pages = "391--404",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "3-4",
}