Target mass corrections for spin-dependent structure functions in collinear factorization

Journal Article · Sun Nov 30 23:00:00 EST 2008 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2008.10.036· OSTI ID:956035

Accardi, Alberto; Melnitchouk, Wolodymyr

We derive target mass corrections (TMC) for the spin-dependent nucleon g_1 and g_2 structure functions in collinear factorization at leading twist. The TMCs are found to be significant for g_1 at large x_B, even at relatively high Q^2 values, but largely cancel in the polarization asymmetry A_1. A comparison of TMCs obtained from collinear factorization and from the operator product expansion shows that at low Q^2 the corrections drive the proton A_1 in opposite directions.

• Research Organization: Thomas Jefferson Lab National Accelerator Facility
• Sponsoring Organization: USDOE
• OSTI ID: 956035
• Report Number(s): JLAB-THY-08-867; arXiv:0808.2397; DOE/OR/23177-0462
• Journal Information: Physics Letters B, Journal Name: Physics Letters B Vol. 670
• Country of Publication: United States
• Language: English