Fully charmed tetraquarks from LHC to FCC: Natural stability from fragmentation
arxiv(2024)
摘要
We investigate the inclusive production of fully charmed tetraquarks,
T_4c(0^++) or T_4c(2^++) radial excitations, in high-energy proton
collisions. We build our study upon the collinear fragmentation of a single
parton in a variable-flavor number scheme, suited to describe the tetraquark
formation mechanism from moderate to large transverse-momentum regimes. To this
extent, we derive a novel set of DGLAP-evolving collinear fragmentation
functions, named TQ4Q1.0 determinations. They encode initial-scale inputs
corresponding to both gluon and heavy-quark fragmentation channels, defined
within the context of quark-potential and spin-physics inspired models,
respectively. We work within the NLL/NLO^+ hybrid factorization and make use
of the JETHAD numeric interface along with the symJETHAD symbolic calculation
plugin. With these tools, we provide predictions for high-energy observables
sensitive to T_4c plus jet emissions at center-of-mass energies ranging
from 14 TeV at the LHC to the 100 TeV nominal energy of the FCC.
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