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物理点に近い格子QCDによるチャームバリオンの分光
- Source :
- Physical Review
- Publication Year :
- 2020
- Publisher :
- American Physical Society (APS), 2020.
-
Abstract
- We calculate the low-lying spectrum of charmed baryons in lattice QCD on the $32^3\times64$, $N_f=2+1$ PACS-CS gauge configurations at the almost physical pion mass of $\sim 156$ MeV/c$^2$. By employing a set of interpolating operators with different Dirac structures and quark-field smearings for the variational analysis, we extract the ground and first few excited states of the spin-$1/2$ and spin-$3/2$, singly-, doubly-, and triply-charmed baryons. Additionally, we study the $\Xi_c$-$\Xi_c^\prime$ mixing and the operator dependence of the excited states in a variational approach. We identify several states that lie close to the experimentally observed excited states of the $\Sigma_c$, $\Xi_c$ and $\Omega_c$ baryons, including some of the $\Xi_c$ states recently reported by LHCb. Our results for the doubly- and triply-charmed baryons are suggestive for future experiments.<br />Comment: 17 pages, 8 figures. version published in PRD
- Subjects :
- Physics
Particle physics
010308 nuclear & particles physics
High Energy Physics::Lattice
Dirac (video compression format)
High Energy Physics - Lattice (hep-lat)
High Energy Physics::Phenomenology
Spectrum (functional analysis)
FOS: Physical sciences
Lattice QCD
01 natural sciences
Omega
Baryon
Charmed baryons
High Energy Physics - Phenomenology
High Energy Physics - Phenomenology (hep-ph)
High Energy Physics - Lattice
Pion
Excited state
0103 physical sciences
High Energy Physics::Experiment
Nuclear Experiment
010306 general physics
Subjects
Details
- ISSN :
- 24700029 and 24700010
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.doi.dedup.....eaa7a043e6385d276511fce3d565e514