New observables in longitudinal single-spin asymmetries in semi-inclusive DIS
نویسندگان
چکیده
We analyze longitudinal beam and target single-spin asymmetries in semi-inclusive deep inelastic scattering and in jet deep inelastic scattering, including all possible twist-3 contributions as well as quark mass corrections. We take into account the path-ordered exponential in the soft correlators and show that it leads to the introduction of a new distribution and a new fragmentation function contributing to the asymmetries. 2004 Elsevier B.V. All rights reserved. PACS: 13.60.Hb; 13.88.+e; 12.39.Fe
منابع مشابه
Single spin asymmetries and gauge invariance in hard scattering processes
Comparison of relativistic bound-state calculations in front-form and instant-form dynamics , Few Body Syst. 33, 27 (2003). New observables in longitudinal single-spin asymmetries in semi-inclusive DIS, Gauge link structure in quark-quark correlators in hard processes,
متن کاملTwo-Photon Exchange in (Semi-)Inclusive DIS
In this note1 we consider effects of a Two-Photon Exchange (TPE) in inclusive DIS and semi-inclusive DIS (SIDIS). In particular, transverse single spin asymmetries are generated in inclusive DIS if more than one photon is exchanged between the lepton and the hadron. We briefly summarize the TPE in DIS in the parton model and extend our approach to SIDIS, where a new leading twist sin(2φ) contri...
متن کاملProspects for spin physics in semi - inclusive processes ∗
I discuss inclusive and semi-inclusive lepton-hadron scattering emphasizing the importance of polarization in order to study various single or double spin asymmetries and the importance of particle identification and angular resolution in the dectection of final state particles to study azimuthal asymmetries. The observables obtained in this way enable a detailed study of quark and gluon correl...
متن کامل2 v 2 1 0 Se p 20 04 Twist - 3 Single Spin Asymmetries in Semi - Inclusive Deep - Inelastic Scattering
The single spin asymmetries for a longitudinally polarized lepton beam or a longitudinally polarized nucleon target in semi-inclusive deep-inelastic scattering are twist-3 observables. We study these asymmetries in a simple diquark spectator model of the nucleon. Analogous to the case of transverse target polarization, non-vanishing asymmetries are generated by gluon exchange between the struck...
متن کاملLight-cone divergence in twist-3 correlation functions
It is argued that the definition of the twist-3 transverse momentum dependent correlation functions must be modified if they contain light-like Wilson lines. In the framework of a simple spectator model of the nucleon we show explicitly the presence of a light-cone divergence for a specific twist-3 time-reversal odd parton density. This divergence emerges for all eight twist-3 T-odd correlators...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2004