Abstract

The production of $\mathit{\Xi}_{cc}^{++}$ baryons in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=13$ TeV is measured in the transverse-momentum range $4<p_\mathrm{T}<15 \mathrm{GeV}$/$c$ and the rapidity range $2.0<y<4.5$. The data used in this measurement correspond to an integrated luminosity of 1.7 $\mathrm{fb}^{-1}$, recorded by the LHCb experiment during 2016. The ratio of the $\mathit{\Xi}_{cc}^{++}$ production cross-section times the branching fraction of the $\mathit{\Xi_{cc}^{++} \to \Lambda_{c}^{+} K^- \pi^+ \pi^+}$ decay relative to the prompt $\mathit{\Lambda_c^{+}}$ production cross-section is found to be $(2.22\pm 0.27 \pm 0.29)\times 10^{-4}$, assuming the central value of the measured $\mathit{\Xi_{cc}^{++}}$ lifetime, where the first uncertainty is statistical and the second systematic.

Figures and captions

Invariant-mass distributions of $\Xi ^{++}_{ c c } $ candidates (a) triggered by TOS and (b) triggered by exTIS, with fit results shown.	TOSMassFit.pdf [20 KiB] HiDef png [240 KiB] Thumbnail [219 KiB]
	TISMassFit.pdf [20 KiB] HiDef png [232 KiB] Thumbnail [207 KiB]
Invariant-mass distributions of $\Lambda ^+_ c $ candidates (a) triggered by TOS and (b) triggered by exTIS, with fit results shown.	LcTOSm[..].pdf [22 KiB] HiDef png [199 KiB] Thumbnail [156 KiB]
	LcTISm[..].pdf [22 KiB] HiDef png [191 KiB] Thumbnail [149 KiB]
Distributions of $\log_{10}(\chi^2_{\text{IP}} (\Lambda ^+_ c ))$ for background-subtracted candidates (a) triggered by TOS and (b) triggered by exTIS, with fit results shown.	LcIPTO[..].pdf [20 KiB] HiDef png [168 KiB] Thumbnail [134 KiB]
	LcIPTI[..].pdf [20 KiB] HiDef png [163 KiB] Thumbnail [129 KiB]
Animated gif made out of all figures.	PAPER-2019-035.gif Thumbnail

Tables and captions

Yields of the signal and normalisation modes.	Table_1.pdf [50 KiB] HiDef png [56 KiB] Thumbnail [24 KiB] tex code
Ratios of the normalisation and signal efficiencies.	Table_2.pdf [85 KiB] HiDef png [35 KiB] Thumbnail [17 KiB] tex code
Relative systematic uncertainties on the production ratio measurement for the two trigger categories.	Table_3.pdf [33 KiB] HiDef png [88 KiB] Thumbnail [42 KiB] tex code
Production rate ratio results for three different $\Xi ^{++}_{ c c } $ lifetime hypotheses. The first uncertainty is statistical and the second is systematic.	Table_4.pdf [93 KiB] HiDef png [49 KiB] Thumbnail [24 KiB] tex code

Created on 20 April 2024.