期刊
PHYSICS LETTERS B
卷 664, 期 4-5, 页码 265-273出版社
ELSEVIER
DOI: 10.1016/j.physletb.2008.05.023
关键词
QCD; jets; higher order calculations; resummation
资金
- STFC [PP/D00621X/2] Funding Source: UKRI
- Science and Technology Facilities Council [PP/D00621X/2] Funding Source: researchfish
We study the matching of the next-to-leading logarithmic approximation (NLLA) onto the fixed next-to-next-to-leading order (NNLO) calculation for event shape distributions in electron-positron annihilation. The resulting theoretical predictions combine all precision QCD knowledge on the distributions, and are theoretically reliable over an extended kinematical range. Compared to previously available matched NLLA + NLO and fixed order NNLO results, we observe that the effects of the combined NLLA + NNLO are small in the three-jet region, relevant for precision physics. (c) 2008 Elsevier B.V. All tights reserved.
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