882468 SzGeCERN 20161219115024.0 eng Carr, B Primordial black holes 2002 SIS MJFILES2005 SzGeCERN XX ARTICLE n 200527 13 20050907 1640 CER01 20050907 546842 236-263 cambridge20020107 PUBLIC 002555379CER ARTICLE 881195 SzGeCERN eng Stenmark, M Shout At The Eta sine loco Uppsala Univ. 2004 51 p Not held by the CERN library Presented on 2004 PhD Uppsala Universitet 2004 Quantum chromodynamics has interesting limits both in the low and the high energy region. In the low energy region one has phenomenology of meson interactions which are still not clearly understood. In the high energy region one wants to find a new theory which will envelope gravity and the standard model in the quantum framework, possibly via some kind of string theory. In this thesis some aspects are touched upon including both these limits. On the one hand we look at meson scattering close to threshold and try to describe cross sections via phenomenological models such as the two-step model. We then go on and dwell upon noncommutative geometry. A framework which has been successful in describing certain aspects of the theory of strings. We also mention some aspects of gravity theories in higher dimensions. The low energy calculations gave some insight in the need to find better understanding of the theories of mesons. The work on noncommutative geometry was on the other hand fruitful in gaining understanding of certain connections between different star products and their relations on a local level. The work on gravity shows how black holes may evaporate into the bulk for certain parameter values of the fundamental constants. SIS PROQUEST2005 SzGeCERN Nuclear Physics THESIS PROQUEST Physics, Nuclear (0610) n 200535 29 20070324 0008 CER01 20050901 PUBLIC 002554211CER DUMMY THESIS