REVIEW 7 cited by
Charm-quark fragmentation fractions and production cross section at midrapidity in pp collisions at the LHC
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Charm-quark fragmentation fractions and production cross section at midrapidity in pp collisions at the LHC
read the original abstract
Recent $p_{\rm T}$-integrated cross section measurements of the ground-state charm mesons and baryons, D$^{\rm 0}$, D$^+$, D$_{\rm s}^{+}$, $\Lambda_{\rm c}^{+}$, and $\Xi_{\rm c}^0$, are used to evaluate the charm fragmentation fractions and production cross section per unit of rapidity at midrapidity ($|y|<0.5$), in pp collisions at $\sqrt{s} = 5.02$ TeV at the LHC. The latter is ${\rm d} \sigma^{\rm c \overline{c}}/{\rm d} y|_{|y| < 0.5}$ =1165 $\pm 44(\rm{stat})^{+134}_{-101}(\rm{syst})$ $\mu b$. These measurements were obtained for the first time in hadronic collisions at the LHC including the charm baryon states, recently measured by ALICE at midrapidity. The charm fragmentation fractions differ significantly from the values measured in e$^+$e$^-$ and ep collisions, providing evidence of the dependence of the parton-to-hadron fragmentation fractions on the collision system, indicating that the assumption of their universality is not supported by the measured cross sections. An increase of a factor of about 3.3 for the fragmentation fraction for the $\Lambda_{\rm c}^{+}$ with a significance of $5\,\sigma$ between the values obtained in pp collisions and those obtained in e$^+$e$^-$ (ep) collisions is reported. The fragmentation fraction for the $\Xi_{\rm c}^0$ was obtained for the first time in any collision system. The measured fragmentation fractions were used to update the $\rm c \overline{c}$ cross sections per unit of rapidity at $|y|<0.5$ at $\sqrt{s} = 2.76$ and 7 TeV, which are about 40% higher than the previously published results. The data were compared with perturbative-QCD calculations and lie at the upper edge of the theoretical bands.
Forward citations
Cited by 7 Pith papers
-
Coupled charm and charmonium transport in a strongly coupled quark-gluon plasma
A unified T-matrix transport framework for charm-quark diffusion and charmonium kinetics with off-shell spectral functions recovers the statistical equilibrium limit and gives fair LHC charmonium R_AA data.
-
A novel phenomenological approach to total charm cross-section measurements at the LHC
A data-driven ddFONLL extrapolation method accounts for LHC-observed charm fragmentation non-universality to derive higher total charm cross sections from D0 fiducial measurements at 5 and 13 TeV, consistent with NNLO...
-
SemiCharmTag: a tool for Semileptonic Charm tagging
SemiCharmTag achieves a factor of ~4 signal-over-background improvement at 81% efficiency for Drell-Yan muons using secondary-vertex hadron tagging in LHCb proton-proton collision simulations.
-
Production of muonic kaon atoms at high-energy colliders
Muonic kaon atoms form in D0 decays with branching ratio 2.29×10^{-10} and via QGP coalescence, with projected yields at LHC and RHIC sufficient for first observation and secondary-vertex reconstruction.
-
Measurement of the top-quark mass using decays with a $J/\psi$ meson at $\sqrt{s}=$13 TeV with the ATLAS detector
Top quark mass measured at 172.17 ± 1.56 GeV via unbinned maximum-likelihood fit to m(ℓ μ⁺μ⁻) in ATLAS Run 2 data using J/ψ decays.
-
Out-of-equilibrium contributions to charm hadrons in a fluid-dynamic approach
Out-of-equilibrium corrections at initialization and freeze-out make computed charm-hadron yields independent of the charm diffusion coefficient and define the reliable transverse-momentum range.
-
SemiCharmTag: a tool for Semileptonic Charm tagging
SemiCharmTag rejects charm-semileptonic muon background under LHCb dimuon Drell–Yan by secondary-vertex tagging with a hadron track, improving S/B by ~4 at 81% signal efficiency in simulation.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.