Eur. Phys. J. C (2014) 74: 2728
https://doi.org/10.1140/epjc/s10052-014-2728-3

Regular Article - Theoretical Physics

Vector-like technineutron Dark Matter: is a QCD-type Technicolor ruled out by XENON100?

¹ Department of Astronomy and Theoretical Physics, Lund University, 223 62 , Lund, Sweden
² Research Institute of Physics, Southern Federal University, 344090 , Rostov-on-Don, Russian Federation
³ Institute for Nuclear Research of Russian Academy of Sciences, 117312 , Moscow, Russian Federation

^* e-mail: Roman.Pasechnik@thep.lu.se

Received: 23 October 2013
Accepted: 7 January 2014
Published online: 12 February 2014

Abstract

One of the specific predictions of a new strongly coupled dynamics at a TeV scale is the existence of stable vector-like technibaryon states so that the lightest neutral one could serve as a Dark Matter candidate. We study the latter hypothesis in the QCD-type technicolor with confined group and one doublet of vector-like techniquarks consistent with electroweak precision constraints and test it against the existing Dark Matter astrophysics data. We discuss the most stringent Dark Matter constraints on weak interactions of technibaryons in technicolor and possible implications of these findings for the cosmological evolution of relic technineutrons. We conclude that vector-like techniquark sectors with an odd group of confinement and with ordinary vector-like weak interactions are excluded by XENON100 data under the assumption of technibaryon number conservation in the modern Universe allowing for an even technicolor group only.