6533b859fe1ef96bd12b8078

RESEARCH PRODUCT

Λc± production in pp collisions with a new fragmentation function

subject

description

We study inclusive ${\mathrm{\ensuremath{\Lambda}}}_{c}^{\ifmmode\pm\else\textpm\fi{}}$-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 $c\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Lambda}}}_{c}^{+}$ fragmentation function combining ${e}^{+}{e}^{\ensuremath{-}}$ 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 ${\mathrm{\ensuremath{\Lambda}}}_{c}^{\ifmmode\pm\else\textpm\fi{}}$ production cross sections from the LHC experimental collaborations is not resolved. The ratio of data for ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}$-baryon and ${D}^{0}$-meson production seems to violate the universality of $c$-quark to $c$-hadron fragmentation.