Search for evidence of photoproduction of higher-twist QCD events at Experiment 683 at Fermi National Accelerator Laboratory

[摘要] Experiment 683 at Fermilab Wide Band Photon Laboratory observed events via $gammam po$ jets during the 1991-1992 fixed target run. The present analysis attempted to observe the higher-twist subprocess in QCD using that data to measure the p$sb{perp}$ spectrum via a clustering algorithm tuned to optimize the distinctive topology of higher-twist events. Results indicate a substantial k$sb{perp}$ promotion effect at lower p$sb{perp}$ and a significant NLO contribution to the photoproduction.

[发布机构] Rice University

[效力级别] Elementary particles