$\Lambda_c^{\pm}$ production in pp collisions with a new fragmentation function

Kniehl, B. A.; Kramer, G.; Spiesberger, H.; Schienbein, I.

Preprint/Report

PUBDB-2020-01553

$\Lambda_c^{\pm}$ production in pp collisions with a new fragmentation function

Kniehl, B. A.Extern* ; Kramer, G.Extern* ; Schienbein, I. ; Spiesberger, H.

2020

[10.3204/PUBDB-2020-01553]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2020-01553

Report No.: DESY-20-058; MITP/20-015; arXiv:2004.04213

Abstract: We study inclusive $\Lambda_c^{\pm}$-baryon production in $pp$ collisions in the general-mass variable-flavor number scheme and compare with data from the LHCb, ALICE and CMS collaborations. We perform a new fit of the $c \to \Lambda_c^+$ fragmentation function combining $e^+e^-$ data from OPAL and Belle. The agreement with LHC data is slightly worse compared with a calculation using an older fragmentation function, and the tension between different determinations of $\Lambda_c^{\pm}$ production cross sections from the LHC experimental collaborations is not resolved. The ratio of data for $\Lambda_c^+$-baryon and $D^0$-meson production seems to violate the universality of $c$-charm quark to $c$-hadron fragmentation.

Keyword(s): p p: scattering ; universality: violation ; fragmentation function ; CERN LHC Coll ; fragmentation ; tension ; BELLE ; ALICE ; quark ; LHC-B ; OPAL ; CMS