44,841 research outputs found
Stringy Origin of Discrete R-symmetries
Discrete symmetries play a crucial role in particle physics. They appear
abundantly in string model constructions. We focus here on the case of discrete
-symmetries which are intrinsically connected to the Lorentz group in extra
dimensions and the appearance of -extended supersymmetry. In that sense,
discrete -symmetries can be understood as "fractionally" extended
supersymmetry. These symmetries reveal insight about the location of fields in
extra dimensions (in particular the Higgs boson). Applications can be found in
the solution of the -problem, suppression of proton decay and the
structure of the soft terms of broken supersymmetry.Comment: Proceedings of the Corfu Summer Institute 2016 "School and Workshops
on Elementary Particle Physics and Gravity",31 August - 23 September, 2016,
Corfu, Greec
Ethnological approach of terrace farming
The vast distribution of terraces in the geographical Sudan zone of West Africa leads to the question why and under which conditions an agrarian society might apply this particular form of farming. From an anthropologist's point of view it is essential to understand why farmers practise this form of farming and therefore try to explain the reason for it. The best way to gain insight is the description of terrace farming and when taking a closer look, we realize that farming is nowhere only an isolated agricultural activity
Triggering at High Luminosity Colliders
This article discusses the techniques used to select online promising events
at high energy and high luminosity colliders. After a brief introduction,
explaining some general aspects of triggering, the more specific implementation
options for well established machines like the Tevatron and Large Hadron
Collider are presented. An outlook on what difficulties need to be met is given
when designing trigger systems at the Super Large Hadron Collider, or at the
International Linear ColliderComment: Accepted for publication in New Journal of Physic
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