The transverse momentum distribution of hadrons within jets

A bstract We study the transverse momentum distribution of hadrons within jets, where the transverse momentum is defined with respect to the standard jet axis. We consider the case where the jet substructure measurement is performed for an inclusive jet sample pp → jet + X. We demonstrate that this...

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Bibliographic Details
Published in:The journal of high energy physics 2017-11, Vol.2017 (11), p.1-27, Article 68
Main Authors: Kang, Zhong-Bo, Liu, Xiaohui, Ringer, Felix, Xing, Hongxi
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Distribution functions
Elementary Particles
Fragmentation
Gluons
Hadrons
High energy physics
Inelastic scattering
Jets
Physics
Physics and Astronomy
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Positron annihilation
QCD Phenomenology
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
String Theory
Transverse momentum
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Summary:A bstract We study the transverse momentum distribution of hadrons within jets, where the transverse momentum is defined with respect to the standard jet axis. We consider the case where the jet substructure measurement is performed for an inclusive jet sample pp → jet + X. We demonstrate that this observable provides new opportunities to study transverse momentum dependent fragmentation functions (TMDFFs) which are currently poorly constrained from data, especially for gluons. The factorization of the cross section is obtained within Soft Collinear Effective Theory (SCET), and we show that the relevant TMDFFs are the same as for the more traditional processes semi-inclusive deep inelastic scattering (SIDIS) and electron-positron annihilation. Different than in SIDIS, the observable for the in-jet fragmentation does not depend on TMD parton distribution functions which allows for a cleaner and more direct probe of TMDFFs. We present numerical results and compare to available data from the LHC.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP11(2017)068