About S-\bar s, \Delta S-\Delta\bar s and D_d^{K+ - K-} in K^\pm Production in Sidis

TL;DR

This paper investigates semi-inclusive deep inelastic scattering to test assumptions about strange quark distributions and fragmentation functions in charged Kaon production, using methods that do not depend on fragmentation function knowledge.

Contribution

It proposes novel tests in SIDIS to verify common assumptions about s-ar s, Δs- extbar s, and D_d^{K+ - K-} without needing fragmentation function data.

Findings

Tests can distinguish between s-ar s=0 and s-ar s≠0

Tests can verify Δs- extbar s=0 assumption

Methods applicable at both LO and NLO

Abstract

We consider semi-inclusive unpolarized DIS for the production of charged Kaons and the different possibilities, both in LO and NLO, to test the conventionally used assumptions s-\bar s=0, \Delta s-\Delta \bar s=0 and D_d^{K+ - K-}=0. The considered tests have the advantage that they do not require any knowledge of the fragmentation functions.