Nov, 2015
Hyperon polarization from the twist-3 distribution in unpolarized proton-proton collision
PHYSICAL REVIEW D
- ,
- ,
- Volume
- 92
- Number
- 9
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevD.92.094011
- Publisher
- AMER PHYSICAL SOC
We investigate the transverse polarization of a hyperon produced in the high-energy unpolarized proton-proton collision, pp -> Lambda up arrow X, based on the collinear twist-3 factorization formalism. We focus on the contribution from the twist-3 distribution in one of the unpolarized proton and the transversity fragmentation function for the final hyperon. Utilizing the "master formula" for the soft-gluon-pole cross section, we clarify the reason for why it receives only the derivative term of the twist-3 distribution. We also present the first computation of the soft-fermion-pole cross section and found that it vanishes. This means that the derivative of the soft-gluon-pole function is the only source for the twist-3 cross section from the unpolarized twist-3 distribution, which provides a useful basis for a phenomenological analysis.
- Link information
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- DOI
- https://doi.org/10.1103/PhysRevD.92.094011
- arXiv
- http://arxiv.org/abs/arXiv:1509.06830
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000364160700005&DestApp=WOS_CPL
- URL
- http://arxiv.org/abs/1509.06830v1
- ID information
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- DOI : 10.1103/PhysRevD.92.094011
- ISSN : 2470-0010
- eISSN : 2470-0029
- arXiv ID : arXiv:1509.06830
- Web of Science ID : WOS:000364160700005