Published 2004 | Version v1
Journal article Metadata-only

Factorization and universality in spin-dependent SIDIS

Creators

  • 1. Joint Institute for Nuclear Research, Dubna (Russian Federation)

Description

The QCD factorization in SIDIS is considered in close analogy to the analysis of the Drell-Yan process. A special role of the (weighted) average over produced hadron transverse momentum is stressed. The case of single spin asymmetry due to the Collins-type fragmentation function is analyzed and its twist-3 nature is uncovered. The analysis of the sources of imaginary phases and respective cuts in hadronic kinematic variables leads to the effective character (nonuniversality) of T-dd distribution functions, contrary to universality of T-odd fragmentation functions

Abstract (Russian)

КХД-факторизация в полуинклюзивном ГНР рассмотрена в тесной аналогии с анализом Дрелла-Яна. Подчеркнута особая роль (взвешенных) стредних по поперечному импульсу образованного адрона. Анализируется случай одиночной спиновой асимметрии, возникающей за счет функции фрагментации коллинзовского типа, показана ее природа твиста-3. Анализ источников мнимых фаз и соответствующих разрезов по адронным переменным ведет к эффективному характеру (неуниверсальности) T-нечетных функций распределения, в отличие от T-нечетных функций факторизации

Additional details

Publishing Information

Journal Title
Fizika Ehlementarnykh Chastits i Atomnogo Yadra
Journal Volume
35
Journal Issue
7
Journal Page Range
p. 46-56
ISSN
0367-2026
CODEN
FECAAR

Conference

Title
High energy spin physics and quantum chromodynamics
Original Conference Title
Spinovaya fizika pri vysokikh ehnergiyakh i kvantovaya khromodinamika
Dates
16-20 Sep 2003
Place
Dubna (Russian Federation)

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
36060479
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ASYMMETRY; DEEP INELASTIC SCATTERING; FACTORIZATION; FEYNMAN DIAGRAM; HADRONS; INCLUSIVE INTERACTIONS; PARTICLE PRODUCTION; QUANTUM CHROMODYNAMICS; SPIN; TWISTOR THEORY
Descriptors DEC
ANGULAR MOMENTUM; DIAGRAMS; ELEMENTARY PARTICLES; FIELD THEORIES; INELASTIC SCATTERING; INFORMATION; INTERACTIONS; LEPTON-BARYON INTERACTIONS; LEPTON-HADRON INTERACTIONS; LEPTON-NUCLEON INTERACTIONS; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; QUANTUM FIELD THEORY; SCATTERING

Optional Information

Notes
17 refs., 1 fig.