Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-04-02
JHEP 0902:049,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
26 pages, 1 figure
Scientific paper
10.1088/1126-6708/2009/02/049
We examine the correspondence between the anti-de Sitter (AdS) description of conformal field theories (CFTs) and the unparticle description of CFTs. We show how unparticle actions are equivalent to holographic boundary actions for fields in AdS, and how massive unparticles provide a new type of infrared cutoff that can be simply implemented in AdS by a soft breaking of conformal symmetry. We also show that processes involving scalar unparticles with dimensions d_s<2 or fermion unparticles with dimensions d_f<5/2 are insensitive to ultraviolet cutoff effects. Finally we show that gauge interactions for unparticles can be described by bulk gauge interactions in AdS and that they correspond to minimal gauging of the non-local effective action, and we compute the fermion unparticle production cross-section.
Cacciapaglia Giacomo
Marandella Guido
Terning John
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