A Light Dilaton in Walking Gauge Theories

Details A Light Dilaton in Walking Gauge Theories A Light Dilaton in Walking Gauge Theories

2010-06-22

arxiv.org/abs/1006.4375v2

Phys.Rev.D82:071701,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, references added, final version in PRD

Scientific paper

10.1103/PhysRevD.82.071701

We analyze the existence of a dilaton in gauge theories with approximate infrared conformal symmetry. To the extent that these theories are governed in the infrared by an approximate fixed point (walking), the explicit breaking of the conformal symmetry at these scales is vanishingly small. If confinement and spontaneous chiral-symmetry breaking set in at some infrared scale, the resultant breaking of the approximate conformal symmetry can lead to the existence of a dilaton with mass parametrically small compared to the confinement scale, and potentially observable at the LHC.

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