Bessel-weighted asymmetries in semi-inclusive deep inelastic scattering

Boer, D.; Gamberg, L.; Musch, B. U.; Prokudin, A.

doi:10.1007/JHEP10(2011)021

Bessel-weighted asymmetries in semi-inclusive deep inelastic scattering

Journal Article · Thu Oct 06 00:00:00 EDT 2011 · Journal of High Energy Physics

DOI:https://doi.org/10.1007/JHEP10(2011)021· OSTI ID:2589089

Boer, D. ^[1]; Gamberg, L. ^[2]; Musch, B. U. ^[3]; Prokudin, A. ^[3]

University of Groningen (The Netherlands)
Penn State University-Berks, Reading, PA (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

The concept of weighted asymmetries is revisited for semi-inclusive deep inelastic scattering. We consider the cross section in Fourier space, conjugate to the outgoing hadron's transverse momentum, where convolutions of transverse momentum dependent parton distribution functions and fragmentation functions become simple products. Individual asymmetric terms in the cross section can be projected out by means of a generalized set of weights involving Bessel functions. Advantages of employing these Bessel weights are that they suppress (divergent) contributions from high transverse momentum and that soft factors cancel in (Bessel-) weighted asymmetries. Also, the resulting compact expressions immediately connect to previous work on evolution equations for transverse momentum dependent parton distribution and fragmentation functions and to quantities accessible in lattice QCD. Furthermore, bessel weighted asymmetries are thus model independent observables that augment the description and our understanding of correlations of spin and momentum in nucleon structure.

View Accepted Manuscript (DOE)

Research Organization:: Penn State University-Berks, Reading, PA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-06OR23177; FG02-07ER41460

OSTI ID:: 2589089

Alternate ID(s):: OSTI ID: 1035556

Journal Information:: Journal of High Energy Physics, Journal Name: Journal of High Energy Physics Journal Issue: 10 Vol. 2011; ISSN 1029-8479

Publisher:: Springer Science and Business Media LLCCopyright Statement

Country of Publication:: United States

Language:: English

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