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- 저자 : Leszek Roszkowski (검색결과 2 건)
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최기영,김진의,Leszek Roszkowski 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.9
We review the status of axino dark matter. Two hierarchy problems, the strong CP problem andthe gauge hierarchy problem, have led to introducing into particle physics a spontaneously brokenglobal Peccei-Quinn symmetry and a softly broken supersymmetry, respectively. Combining themimplies the presence of not only an axion, but also its scalar component, saxion, and their fermionicpartner, axino. Among these, the axion and the axino are attractive dark matter candidates. Various possibilities for the axino as dark matter are discussed.
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Dark matter production in the early Universe: Beyond the thermal WIMP paradigm
Baer, Howard,Choi, Ki-Young,Kim, Jihn E.,Roszkowski, Leszek Elsevier 2015 Physics reports Vol.555 No.-
<P><B>Abstract</B></P> <P>Increasingly stringent limits from LHC searches for new physics, coupled with lack of convincing signals of weakly interacting massive particle (WIMP) in dark matter searches, have tightly constrained many realizations of the standard paradigm of thermally produced WIMPs as cold dark matter. In this article, we review more generally both thermally and non-thermally produced dark matter (DM). One may classify DM models into two broad categories: one involving bosonic coherent motion (BCM) and the other involving WIMPs. BCM and WIMP candidates need, respectively, some approximate global symmetries and almost exact discrete symmetries. Supersymmetric axion models are highly motivated since they emerge from compelling and elegant solutions to the two fine-tuning problems of the Standard Model: the strong CP problem and the gauge hierarchy problem. We review here non-thermal relics in a general setup, but we also pay particular attention to the rich cosmological properties of various aspects of mixed SUSY/axion dark matter candidates which can involve both WIMPs and BCM in an interwoven manner. We also review briefly a panoply of alternative thermal and non-thermal DM candidates.</P>
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