Unparticle Self-Interactions and Their Collider Implications

Details Unparticle Self-Interactions and Their Collider Implications Unparticle Self-Interactions and Their Collider Implications

2008-01-10

arxiv.org/abs/0801.1534v2

Phys.Rev.D77:075007,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 5 figures; v2: published version

Scientific paper

10.1103/PhysRevD.77.075007

In unparticle physics, operators of the conformal sector have self-interactions, and these are unsuppressed for strong coupling. The 3-point interactions are completely determined by conformal symmetry, up to a constant. We do not know of any theoretical upper bounds on this constant. Imposing current experimental constraints, we find that these interactions mediate spectacular collider signals, such as $pp -> U -> UU -> \gamma \gamma \gamma \gamma$, $\gamma \gamma ZZ$, $ZZZZ$, $\gamma \gamma l^+ l^-$, $ZZ l^+ l^-$, and $4l$, with cross sections of picobarns or larger at the Large Hadron Collider. Self-interactions may therefore provide the leading discovery prospects for unparticle physics.

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