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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 542964.0, MPI für Physik / MPI für Physik
Mesons from global Anti-de Sitter space
Authors:Erdmenger, Johanna; Filev, Veselin
Date of Publication (YYYY-MM-DD):2011
Title of Journal:Journal of High Energy Physics
Journal Abbrev.:JHEP
Issue / Number:2011
Start Page:119
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:In the context of gauge/gravity duality, we study both probe D7-- and probe D5--branes in global Anti-de Sitter space. The dual field theory is N=4 theory on R x S^3 with added flavour. The branes undergo a geometrical phase transition in this geometry as function of the bare quark mass m_q in units of 1/R with R the S^3 radius. The meson spectra are obtained from fluctuations of the brane probes. First, we study them numerically for finite quark mass through the phase transition. Moreover, at zero quark mass we calculate the meson spectra analytically both in supergravity and in free field theory on R x S^3 and find that the results match: For the chiral primaries, the lowest level is given by the zero point energy or by the scaling dimension of the operator corresponding to the fluctuations, respectively. The higher levels are equidistant. Similar results apply to the descendents. Our results confirm the physical interpretation that the mesons cannot pair-produce any further when their zero-point energy exceeds their binding energy.
Classification / Thesaurus:Theoretical Physics
Comment of the Author/Creator:43 pages, 8 figures, references edited, few typos corrected, updated to match the published version
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2010-159
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/arxiv:1012.0496v2
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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