Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-12-14
PoS LAT2009:193,2009
Physics
High Energy Physics
High Energy Physics - Lattice
8 pages, 4 figures. Presented at the XXVII International Symposium on Lattice Field Theory, July 26-31, 2009, Peking Universit
Scientific paper
The strong coupling limit (beta_gauge = 0) of QCD offers a number of remarkable research possibilities, of course at the price of large lattice artifacts. Here, we determine the complete phase diagram as a function of temperature T and baryon chemical potential mu_B, for one flavor of staggered fermions in the chiral limit, with emphasis on the determination of a tricritical point and on the T ~ 0 transition to nuclear matter. The latter is known to happen for mu_B substantially below the baryon mass, indicating strong nuclear interactions in QCD at infinite gauge coupling. This leads us to studying the properties of nuclear matter from first principles. We determine the nucleon-nucleon potential in the strong coupling limit, as well as masses m_A of nuclei as a function of their atomic number A. Finally, we clarify the origin of nuclear interactions at strong coupling, which turns out to be a steric effect.
Forcrand Philippe de
Fromm Michael
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