Doubly charmed baryon production in heavy ion collisions · arXivDesk
1801.02652Jan 8, 20189 pages, 3 figures, add a discussion of productions of other doubly heavy baryons and doubly heavy tetraquarks; add a discussion on diquark free energy on the lattice; add a comment on experimental feasibility; published version
Doubly charmed baryon production in heavy ion collisions
We give an estimate of Ξcc++ production rate and transverse momentum spectra in relativistic heavy ion collisions. We use Boltzmann transport equations to describe the dynamical evolution of charm quarks and diquarks inside quark-gluon plasma. In-medium formation and dissociation rates of charm diquarks are calculated from potential non-relativistic QCD for the diquark sector. We solve the transport equations by Monte Carlo simulations. For 2.76 TeV Pb-Pb collisions with 0−10%
Nearby in the stack
centrality, the number of
Ξcc++
produced in the transverse momentum range
0−5
GeV and rapidity from
−1
to
1
is roughly
0.02
per collision. We repeat the calculation with a melting temperature
250
MeV above which no diquarks can be formed. The number of
Ξcc++
produced in the same kinematic region is about
0.0125
per collision. We discuss how to study diquarks at finite temperature on a lattice and construct the anti-triplet free energy in a gauge invariant but path dependent way. We also comment on extensions of the calculation to other doubly heavy baryons and doubly heavy tetraquarks and the feasibility of experimental measurements.