Inclusive production of charged hadrons in photon–photon collisions

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• 作者：G. Abbiendi ; C. Ainsley ; P.F. Å ; kesson ; G. Alex ; er ; G. Anagnostou ; K.J. Anderson ; S. Asai ; D. Axen ; I. Bailey ; E. Barberio ; T. Barillari ; R.J. Barlow ; R.J. Batley ; P. Bechtle ; T. Behnke ; K.W. Bell
• 关键词：Photo-production ; Strangeness ; Neutral kaon ; Quasi-free reaction ; Cross section ; Isobar model
• 刊名：Physics Letters B
• 出版年：2007
• 期刊代码：58_03702693
• 类别：ph
• 出版时间：26 July 2007
• 卷：651
• 期：2-3
• 页码：92-101
• 文件大小：311 K

摘要

The inclusive production of charged hadrons in the collisions of quasi-real photons (e⁺e⁻→e⁺e⁻+X) has been measured using the OPAL detector at LEP. The data were taken at e⁺e⁻ centre-of-mass energies from 183 to 209 GeV. The differential cross-sections as a function of the transverse momentum and the pseudorapidity of the hadrons are compared to theoretical calculations of up to next-to-leading order (NLO) in the strong coupling constant α_s. The data are also compared to a measurement by the L3 Collaboration, in which a large deviation from the NLO predictions is observed.