Kinematics of current region fragmentation in semi-inclusive deeply inelastic scattering

M. Boglione, J. Collins, L. Gamberg, J. O. Gonzalez-Hernandez, T. C. Rogers, N. Sato

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Different kinematical regions of semi-inclusive deeply inelastic scattering (SIDIS) processes correspond to different underlying partonic pictures, and it is important to understand the transition between them. We find criteria in semi-inclusive deeply inelastic scattering (SIDIS) for identifying the current fragmentation region — the kinematical region where a factorization picture with fragmentation functions is appropriate, especially for studies of transverse-momentum-dependent (TMD) functions. This region is distinguished from the central (soft) and target fragmentation regions. The basis of our argument is in the errors in approximations used in deriving factorization. As compared with previous work, we show that it is essential to take account of the transverse momentum of the detected hadron, and we find a much more restricted range for genuine current fragmentation. We show that it is important to develop an extended factorization formulation to treat hadronization in the central region, as well as the current and target fragmentation regions, and to obtain a unified formalism spanning all rapidities for the detected hadron.

Original languageEnglish (US)
Pages (from-to)245-253
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume766
DOIs
StatePublished - Mar 10 2017

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fragmentation
inelastic scattering
kinematics
factorization
transverse momentum
formalism
formulations
approximation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

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abstract = "Different kinematical regions of semi-inclusive deeply inelastic scattering (SIDIS) processes correspond to different underlying partonic pictures, and it is important to understand the transition between them. We find criteria in semi-inclusive deeply inelastic scattering (SIDIS) for identifying the current fragmentation region — the kinematical region where a factorization picture with fragmentation functions is appropriate, especially for studies of transverse-momentum-dependent (TMD) functions. This region is distinguished from the central (soft) and target fragmentation regions. The basis of our argument is in the errors in approximations used in deriving factorization. As compared with previous work, we show that it is essential to take account of the transverse momentum of the detected hadron, and we find a much more restricted range for genuine current fragmentation. We show that it is important to develop an extended factorization formulation to treat hadronization in the central region, as well as the current and target fragmentation regions, and to obtain a unified formalism spanning all rapidities for the detected hadron.",
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Kinematics of current region fragmentation in semi-inclusive deeply inelastic scattering. / Boglione, M.; Collins, J.; Gamberg, L.; Gonzalez-Hernandez, J. O.; Rogers, T. C.; Sato, N.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 766, 10.03.2017, p. 245-253.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Kinematics of current region fragmentation in semi-inclusive deeply inelastic scattering

AU - Boglione, M.

AU - Collins, J.

AU - Gamberg, L.

AU - Gonzalez-Hernandez, J. O.

AU - Rogers, T. C.

AU - Sato, N.

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