The operator level proof of factorization theorem exhibited in [ar Xiv：hep-ph/1307.4194] is extended to the semi-inclusive deep inelastic scattering process（SIDIS）. Factorization theorem can be proved at operator l...The operator level proof of factorization theorem exhibited in [ar Xiv：hep-ph/1307.4194] is extended to the semi-inclusive deep inelastic scattering process（SIDIS）. Factorization theorem can be proved at operator level if there are not detected soft hadrons. The key point is that the initial one-nucleon state is the eigenstate of QCD.展开更多
In this study,we investigate the Kotzinian-Mulders effect under semi-inclusive deep inelastic scattering(SIDIS)within the framework of transverse momentum dependent(TMD)factorization.The asymmetry is contributed by th...In this study,we investigate the Kotzinian-Mulders effect under semi-inclusive deep inelastic scattering(SIDIS)within the framework of transverse momentum dependent(TMD)factorization.The asymmetry is contributed by the convolution of the Kotzinian-Mulders function g_(1T)and the unpolarized fragmentation function D_(1).As a TMD distribution,the Kotzinian-Mulders function in the coordinate space in the perturbative region can be represented as the convolution of the C-coefficients and the corresponding collinear correlation function.The Wandzura-Wilczek approximation is used to obtain this correlation function.We perform a detailed phenomenological numerical analysis of the Kotzinian-Mulders effect in the SIDIS process within TMD factorization at the kinematics of the HERMES and COMPASS experiments.We observe that the obtained x_(B)-,z_(h)-,and P_(h⊥)-dependent Kotzinian-Mulders effects are basically consistent with the HERMES and COMPASS measurements.We also make predictions at EIC and EicC kinematics.展开更多
This article presents a review of our present understanding of the spin structure of the unpolarized hadron. Particular attention is paid to the quark sector at leading twist, namely, the quark Boer-Mulders function, ...This article presents a review of our present understanding of the spin structure of the unpolarized hadron. Particular attention is paid to the quark sector at leading twist, namely, the quark Boer-Mulders function, which describes the transverse polarization of the quark inside an unpolarized hadron. After introducing the operator definition of the Boer-Mulders function, a detailed treatment of different non-perturbative calculations of the Boer-Mulders functions is provided. The phenomenology in Drell-Yan processes and semi-inclusive leptoproduction, including the extraction of the quark and antiquark Boer-Mulders functions from experimental data, is presented comprehensively. Finally, prospects for future theoretical studies and experimental measurements are presented in brief.展开更多
We analyze the left-right asymmetry in the semi-inclusive deep inelastic scattering （SIDIS） process using a method where no weighting function are used. Considering all flavor of quarks, we reanalyze the π±pro...We analyze the left-right asymmetry in the semi-inclusive deep inelastic scattering （SIDIS） process using a method where no weighting function are used. Considering all flavor of quarks, we reanalyze the π±production and extend our calculation on the K± production. The predictions on HERMES, COMPASS and JLab kinematics with transversely polarized nucleon target are shown in this paper.展开更多
基金Supported by the National Nature Science Foundation of China under Grant No.11275242
文摘The operator level proof of factorization theorem exhibited in [ar Xiv：hep-ph/1307.4194] is extended to the semi-inclusive deep inelastic scattering process（SIDIS）. Factorization theorem can be proved at operator level if there are not detected soft hadrons. The key point is that the initial one-nucleon state is the eigenstate of QCD.
基金Supported by the National Natural Science Foundation of China(12075043)。
文摘In this study,we investigate the Kotzinian-Mulders effect under semi-inclusive deep inelastic scattering(SIDIS)within the framework of transverse momentum dependent(TMD)factorization.The asymmetry is contributed by the convolution of the Kotzinian-Mulders function g_(1T)and the unpolarized fragmentation function D_(1).As a TMD distribution,the Kotzinian-Mulders function in the coordinate space in the perturbative region can be represented as the convolution of the C-coefficients and the corresponding collinear correlation function.The Wandzura-Wilczek approximation is used to obtain this correlation function.We perform a detailed phenomenological numerical analysis of the Kotzinian-Mulders effect in the SIDIS process within TMD factorization at the kinematics of the HERMES and COMPASS experiments.We observe that the obtained x_(B)-,z_(h)-,and P_(h⊥)-dependent Kotzinian-Mulders effects are basically consistent with the HERMES and COMPASS measurements.We also make predictions at EIC and EicC kinematics.
文摘This article presents a review of our present understanding of the spin structure of the unpolarized hadron. Particular attention is paid to the quark sector at leading twist, namely, the quark Boer-Mulders function, which describes the transverse polarization of the quark inside an unpolarized hadron. After introducing the operator definition of the Boer-Mulders function, a detailed treatment of different non-perturbative calculations of the Boer-Mulders functions is provided. The phenomenology in Drell-Yan processes and semi-inclusive leptoproduction, including the extraction of the quark and antiquark Boer-Mulders functions from experimental data, is presented comprehensively. Finally, prospects for future theoretical studies and experimental measurements are presented in brief.
基金Supported by National Natural Science Foundation of China (10721063, 10575003, 10528510)Key Grant Project of Chinese Ministry of Education (305001)
文摘We analyze the left-right asymmetry in the semi-inclusive deep inelastic scattering （SIDIS） process using a method where no weighting function are used. Considering all flavor of quarks, we reanalyze the π±production and extend our calculation on the K± production. The predictions on HERMES, COMPASS and JLab kinematics with transversely polarized nucleon target are shown in this paper.
