New collinear twist-3 analysis of transverse SSA: Toward a resolution for the sign-mismatch problem
- Temple Univ., Philadelphia, PA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Niigata Univ., Niigata (Japan)
We present a new collinear twist-3 analysis of the transverse SSA AN at RHIC. We use the TMD Sivers/Collins function to fix some of the relevant collinear twist-3 functions and perform a fit of the RHIC data with other parameterized twist-3 functions. This allows us to keep the consistency among descriptions in pp collision, SIDIS, and e+e– annihilation and thus could provide a unified description of the spin asymmetries in the low- and high-PT processes. In conclusion, by taking into account the twist-3 fragmentation contribution, we show for the first time this contribution could be the main source of AN in pp↑ → hX and its inclusion could provide a solution for the sign-mismatch problem.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- RIKEN
- Grant/Contract Number:
- SC00112704
- OSTI ID:
- 1228859
- Report Number(s):
- BNL-108591-2015-JA; R&D Project: PO-3
- Journal Information:
- Few-Body Systems, Vol. 56, Issue 6-9; ISSN 0177-7963
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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