629 research outputs found
Chiral Transition of SU(4) Gauge Theory with Fermions in Multiple Representations
We report preliminary results on the finite temperature behavior of SU(4)
gauge theory with dynamical quarks in both the fundamental and two-index
antisymmetric representations. This system is a candidate to present scale
separation behavior, where fermions in different representations condense at
different temperature or coupling scales. Our simulations, however, reveal a
single finite-temperature phase transition at which both representations
deconfine and exhibit chiral restoration. It appears to be strongly first
order. We compare our results to previous single-representation simulations. We
also describe a Pisarski-Wilczek stability analysis, which suggests that the
transition should be first order.Comment: 8 pages, 5 figures. Presented at at Lattice 2017, the 35th
International Symposium on Lattice Field Theory, Granada, Spain, 18-24 June
201
New Mexico Daily Lobo, Volume 083, No 15, 9/14/1979
New Mexico Daily Lobo, Volume 083, No 15, 9/14/1979https://digitalrepository.unm.edu/daily_lobo_1979/1087/thumbnail.jp
Gravitational form factors of the proton from lattice QCD
The gravitational form factors (GFFs) of a hadron encode fundamental aspects
of its structure, including its shape and size as defined from e.g., its energy
density. This work presents a determination of the flavor decomposition of the
GFFs of the proton from lattice QCD, in the kinematic region . The decomposition into up-, down-, strange-quark, and gluon
contributions provides first-principles constraints on the role of each
constituent in generating key proton structure observables, such as its
mechanical radius, mass radius, and -term.Comment: Additional comparisons added to Figures 2 and 4. 8 pages, 4 figures,
1 table in the main text plus 11 pages, 8 figures, 2 tables in the
supplementary materia
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