The European Physical Journal C

, Volume 58, Issue 1, pp 69–81 | Cite as

Glueballs and the superfluid phase of Two-Color QCD

  • M. P. Lombardo
  • M. L. Paciello
  • S. Petrarca
  • B. Taglienti
Regular Article - Theoretical Physics

Abstract

We present the first results on scalar glueballs in cold, dense matter using lattice simulations of two-color QCD. The simulations are carried out on a 63×12 lattice and use a standard hybrid molecular dynamics algorithm for staggered fermions for two values of quark mass. The glueball correlators are evaluated via a multi-step smearing procedure. The amplitude of the glueball correlator peaks in correspondence with the zero temperature chiral transition, μ c=m π /2, and the propagators change in a significant way in the superfluid phase, while the Polyakov loop is nearly insensitive to the transition. Standard analysis suggest that lowest mass in the 0++ gluonic channel decreases in the superfluid phase, but these observations need to be confirmed on larger and more elongated lattices. These results indicate that a non-zero density induces non-trivial modifications of the gluonic medium.

PACS

12.38 Gc 11.15.Ha 12.38.Aw 

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2008

Authors and Affiliations

  • M. P. Lombardo
    • 1
  • M. L. Paciello
    • 2
  • S. Petrarca
    • 2
    • 3
  • B. Taglienti
    • 2
  1. 1.INFNLaboratori Nazionali di FrascatiFrascatiItaly
  2. 2.INFNSezione di RomaRomaItaly
  3. 3.Dipartimento di Fisica SapienzaUniversità di RomaRomaItaly

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