Two-photon production of ? pairs H Albrecht , T Hamacher , R P Hofmann , T Kirchhoff , R Mankel , A Nau , S Nowak , D Ressing , Henning Schroder , H Schulz , Mark Walter , R Wurth , C Hast , H Kapitza , H Kolanoski , A Kosche , A E Lange , A Lindner , M Schieber , Thomas Siegmund , B Spaan , H Thurn , D Topfer , D Wegener , P Eckstein , C Frankl , Jeanine Graf , M Schmidtler , Malte Schramm , K R Schubert , R Schwierz , R Waldi , K Reim , H Wegener , R Eckmann , H Kuipers , O Mai , R Mundt , T Oest , R Reiner , W Schmidtparzefall , J Stiewe , S Werner , K Ehret , W Hofmann , A Hupper , K T Knopfle , Johannes Spengler , P Krieger , D B Macfarlane , J D Prentice , P R B Saull , K Tzamariudaki , R G Van De Water , T S Yoon , M Schneider , S Weseler , G Kernel , P Krizan , E Kriznic , T Podobnik , T Zivko , V Balagura , S Barsuk , I Belyaev , R Chistov , M Danilov , V Eiges , L I Gershtein , Yu Gershtein , A Golutvin , O Igonkina , I Korolko , G Kostina , D O Litvintsev , P Pakhlov , S Semenov , A Snizhko , I Tichomirov , Yu Zaitsev Physics Letters B（1996）
摘要
Abstract A maximum likelihood analysis of ARGUS data on two-photon production of π+π+π0π0π−π− is presented. A small fraction of events is due to the production of omega pairs. The γγ → ωω cross section has its maximum value close to threshold.
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maximum likelihood, cross section
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