Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 84: Theorie: BSM II

T 84.9: Talk

Thursday, March 22, 2018, 18:35–18:50, Z6 - SR 1.010

Bulk mode exchange between two parallel 3-branes in a DGP type braneworld scenario — •Max Warkentin — Ludwig-Maximilians-Universität Fakultät für Physik Theoretische Physik Lehrstuhl Prof. Dvali Theresienstr. 37 80333 München

In theories with large extra dimensions it is possible to lower the fundamental Planck scale and hence resolve the hierarchy problem. As a consequence, in those theories, graviton production rates and other experimental signatures differ from those where large extra dimensions are absent. Although so far no experimental evidence has been found for the reality of the investigated models, the prediction of a fundamental Planck scale, which is in our observational reach, remains tempting. In order to further sharpen the predictive power of those models, we study a particular braneworld scenario with two parallel 3-branes, embedded in a 4+1 dimensional flat spacetime. The setup is of the type of the Dvali-Gabadadze- Porrati (DGP) model, in which a kinetic term for gravity is induced on the branes by the matter fields localized on them. We investigate the gravitational exchange between two static point sources localized on their respective branes. In particular, the distance between the branes influences which modes of the lower dimensional mode expansion of the 5- dimensional graviton are being exchanged predominantly. Our investigation could strengthen the possibility to observe the existence of large extra dimensions.