
Roman Pasechnik, Vitaly Beylin, Vladimir Kuksa, Grigory Vereshkov
Vectorlike technineutron Dark Matter: is a QCDtype Technicolor ruled out by XENON100?
Abstract
We continue to explore a question about the existence of a new strongly coupled dynamics above the electroweak scale. The latter has been recently realized in the simplest consistent scenario, the vectorlike (or chiralsymmetric) Technicolor model based upon the gauged linear sigmamodel. One of the predictions of a new strong dynamics in this model, the existence of stable vectorlike technibaryon states at a TeV scale, such that the lightest neutral one could serve as a Dark Matter candidate. Here, we consider the QCDtype Technicolor with SU(3)_TC confined group and one SU(2)_W doublet of vectorlike techniquarks and test this model against existing Dark Matter astrophysics data. We show that the spinindependent Dirac technineutronnucleon cross section is by far too large and ruled out by XENON100 data. We conclude that vectorlike techniquark sectors with an odd group of confinement SU(2n+1)_TC, n=1,2,... and with ordinary vectorlike weak SU(2)_W interactions are excluded if the technibaryon number is conserved. We discuss a possible generic TC scenario with a technibaryon sector interacting via an extra vector SU(2)_V other than the standard weak SU(2)_W and consider immediate implications for the cosmological evolution and freeze out of heavy relic technineutrons.
LU TP 1327
