TY - JOUR
T1 - Constraining the hadronic spectrum through QCD thermodynamics on the lattice
AU - Alba, Paolo
AU - Bellwied, Rene
AU - Borsányi, Szabolcs
AU - Fodor, Zoltan
AU - Günther, Jana
AU - Katz, Sandor D.
AU - Mantovani Sarti, Valentina
AU - Noronha-Hostler, Jacquelyn
AU - Parotto, Paolo
AU - Pasztor, Attila
AU - Vazquez, Israel Portillo
AU - Ratti, Claudia
N1 - We acknowledge fruitful discussions with Elena Santopinto, Igor Strakovsky, Moskov Amaryan and Mark Manley. This project was funded by the Deutsche Forschungsgemeinschaft (DFG) Grant No. SFB/TR55. This material is based upon work supported by the National Science Foundation under Grants No. PHY-1513864, PHY-1654219 and OAC-1531814 and by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, within the framework of the Beam Energy Scan Theory (BEST) Topical Collaboration. The work of R. B. is supported through Department of Energy (DOE) Grant No. DEFG02-07ER41521. An award of computer time was provided by the INCITE program. This research used resources of the Argonne Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract No. DE-AC02-06CH11357. The authors gratefully acknowledge the Gauss Centre for Supercomputing (GCS) for providing computing time for a GCS Large-Scale Project on the GCS share of the supercomputer JUQUEEN [61] at Jülich Supercomputing Centre (JSC), and at HazelHen supercomputer at High Performance Computing Center (HLRS), Stuttgart. The authors gratefully acknowledge the use of the Maxwell Cluster and the advanced support from the Center of Advanced Computing and Data Systems at the University of Houston.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Fluctuations of conserved charges allow us to study the chemical composition of hadronic matter. A comparison between lattice simulations and the hadron resonance gas (HRG) model suggested the existence of missing strange resonances. To clarify this issue we calculate the partial pressures of mesons and baryons with different strangeness quantum numbers using lattice simulations in the confined phase of QCD. In order to make this calculation feasible, we perform simulations at imaginary strangeness chemical potentials. We systematically study the effect of different hadronic spectra on thermodynamic observables in the HRG model and compare to lattice QCD results. We show that, for each hadronic sector, the well-established states are not enough in order to have agreement with the lattice results. Additional states, either listed in the Particle Data Group booklet (PDG) but not well established, or predicted by the quark model (QM), are necessary in order to reproduce the lattice data. For mesons, it appears that the PDG and the quark model do not list enough strange mesons, or that, in this sector, interactions beyond those included in the HRG model are needed to reproduce the lattice QCD results.
AB - Fluctuations of conserved charges allow us to study the chemical composition of hadronic matter. A comparison between lattice simulations and the hadron resonance gas (HRG) model suggested the existence of missing strange resonances. To clarify this issue we calculate the partial pressures of mesons and baryons with different strangeness quantum numbers using lattice simulations in the confined phase of QCD. In order to make this calculation feasible, we perform simulations at imaginary strangeness chemical potentials. We systematically study the effect of different hadronic spectra on thermodynamic observables in the HRG model and compare to lattice QCD results. We show that, for each hadronic sector, the well-established states are not enough in order to have agreement with the lattice results. Additional states, either listed in the Particle Data Group booklet (PDG) but not well established, or predicted by the quark model (QM), are necessary in order to reproduce the lattice data. For mesons, it appears that the PDG and the quark model do not list enough strange mesons, or that, in this sector, interactions beyond those included in the HRG model are needed to reproduce the lattice QCD results.
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U2 - 10.1103/PhysRevD.96.034517
DO - 10.1103/PhysRevD.96.034517
M3 - Article
AN - SCOPUS:85029160526
SN - 2470-0010
VL - 96
JO - Physical Review D
JF - Physical Review D
IS - 3
M1 - 034517
ER -