Exposing the QCD Splitting Function with CMS Open Data

被引：47

作者：

Larkoski, Andrew ^{[1
]}

Marzani, Simone ^{[2
]}

Thaler, Jesse ^{[3
]}

Tripathee, Aashish ^{[3
]}

Xue, Wei ^{[3
]}

机构：

[1] Reed Coll, Dept Phys, Portland, OR 97202 USA

[2] Univ Buffalo State Univ New York, Buffalo, NY 14260 USA

[3] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 13期

基金：

美国国家科学基金会;

关键词：

EVENT SHAPE DISTRIBUTIONS; DEEP INELASTIC-SCATTERING; JET CROSS-SECTIONS; 2ND-ORDER CONTRIBUTIONS; E+E-ANNIHILATION; GLUON AMPLITUDES; PARTON DENSITIES; LEADING ORDER; 3-JET EVENTS; MONTE-CARLO;

D O I：

10.1103/PhysRevLett.119.132003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The splitting function is a universal property of quantum chromodynamics (QCD) which describes how energy is shared between partons. Despite its ubiquitous appearance in many QCD calculations, the splitting function cannot be measured directly, since it always appears multiplied by a collinear singularity factor. Recently, however, a new jet substructure observable was introduced which asymptotes to the splitting function for sufficiently high jet energies. This provides a way to expose the splitting function through jet substructure measurements at the Large Hadron Collider. In this Letter, we use public data released by the CMS experiment to study the two-prong substructure of jets and test the 1 -> 2 splitting function of QCD. To our knowledge, this is the first ever physics analysis based on the CMS Open Data.

引用

页数：7

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