Infrared-safe definition of jet flavour

被引：140
作者：
Banfi, A. [1 ]
Salam, G. P.
Zanderighi, G.
机构：
[1] Ctr Math Sci, DAMTP, Cambridge CB3 0WA, England
[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[3] Univ Milano Bicocca, Milan, Italy
[4] Ist Nazl Fis Nucl, Sez Milan, Milan, Italy
[5] Univ Paris 06, LPTHE, F-75252 Paris, France
[6] Univ Denis Diderot Paris 7, F-75252 Paris, France
[7] CNRS, F-75005 Paris, France
[8] Fermilab Natl Accelerator Lab, Theory Grp, Batavia, IL USA
[9] CERN, Dept Phys, Div Theory, CH-1211 Geneva 23, Switzerland
来源：
EUROPEAN PHYSICAL JOURNAL C | 2006年 / 47卷 / 01期
关键词：
D O I：
10.1140/epjc/s2006-02552-4
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
It is common, in both theoretical and experimental studies, to separately discuss quark and gluon jets. However, even at parton level, widely-used jet algorithms fail to provide an infrared-safe way of making this distinction. We examine the origin of the problem and propose a solution in terms of a new "flavour-k(t)" algorithm. As well as being of conceptual interest this can be a powerful tool when combining fixed-order calculations with multi-jet resummations and parton showers. It also has applications to studies of heavy-quark jets.
引用
收藏
页码：113 / 124
页数：12
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