Why Unparticle Models with Mass Gaps are Examples of Hidden Valleys

Understand

Hidden valleys, hidden sectors with multi-particle dynamics and a mass gap, can produce striking and unusual final states at the LHC.

• Unparticle models, hidden-sectors with conformal dynamics and no (or a very small) mass gap, can result in unusual kinematic features that indirectly reflect the conformal dynamics.
• When sufficiently large mass gaps are added to unparticle models, they become hidden valley models.
• Predictions using unparticle propagators alone overlook the most striking signals, which are typically of hidden-valley type.