The transverse polarization of $$\Lambda $$ hyperons in $$e^+e^-\rightarrow \Lambda ^\uparrow h X$$ processes within TMD factorization

نویسندگان

چکیده

We investigate the transverse polarization of $\Lambda$ hyperon in processes $e^+e^-\to\Lambda^\uparrow \pi^\pm X$ and K^\pm within framework momentum dependent~(TMD) factorization. The is contributed by convolution transversely polarizing fragmentation function~(PFF) $D_{1T}^\perp$ lambda unpolarized function $D_1$ pion/kaon. adopt spectator diquark model result for $D_{1T}^{\perp}$ to numerically estimate h process at kinematical region Belle Collaboration. To implement TMD evolution formalism functions, we apply two different parametrizations on nonperturbative Sudakov form factors associated with functions $\Lambda$, pion kaon. It found that our prediction $\Lambda \pi^+$ production $\bar{\Lambda} \pi^-$ consistent recent measurement size sign, while predictions polarizations $\Lambda\pi^-$ K^\pm$ productions show strong disagreement data. reason discrepancies discussed possible approaches improve calculation future are also discussed.

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ژورنال

عنوان ژورنال: European Physical Journal C

سال: 2021

ISSN: ['1434-6044', '1434-6052']

DOI: https://doi.org/10.1140/epjc/s10052-021-09064-1