Planck 2018&nbsp;<br /> <h2>From the Planck Scale to the Electroweak Scale</h2>

Session

Parallel Session on Astro-DM II

24 May 2018, 16:10

Bonn

129. Lessons from the DAMPE data

Ms Annika Reinert (BCTP, PI der Universität Bonn)

24/05/2018, 16:10

The cosmic ray electron + positron flux measured recently by the DAMPE experiment up to 5 TeV has gained great attention. So far, the interpretations focuss on the spectral softening around 0.9 TeV and on a small fluctuation of one data point at 1.4 TeV. We want to point at three additional features that can be found in the data by separating the primary and the seconary compontent of the...

130. Radiation Injection as a Solution to the EDGES 21 cm Anomaly

Kristjan Kannike

24/05/2018, 16:30

The recently claimed anomaly in the measurement of the 21 cm hydrogen absorption signal by EDGES at redshift z = 17, if cosmological, requires the existence of new physics. The possible attempts to resolve the anomaly rely on either (i) cooling the hydrogen gas via new dark matter-hydrogen interactions or (ii) modifying the soft photon background beyond the standard CMB (suggested by the...

131. Leptophilic dark matter from gauged lepton number: Phenomenology and gravitational wave signatures

Eric Madge

24/05/2018, 16:50

In this work, we consider a model in which the SM is extended by a lepton number gauge group $U(1)_L$. The arising gauge anomalies are canceled by adding two sets of SM vector-like leptons. We further add a scalar field that spontaneously breaks $U(1)_L$. A residual global symmetry ensures the stability of the lightest additional lepton, thus providing a dark matter candidate. We investigate...

132. The inflaton portal to PeV-EeV Dark Matter

Dr Lucien Heurtier (University of Arizona)

24/05/2018, 17:10

In this talk I will present a new paradigm for dark matter production in which the dark constituent of our Universe is in contact with the visible bath exclusively through the inflationary sector. I will show that experimental constraints on the inflationary energy scale and the dark matter relic density can be balanced by the use of a very minimal set up and that such a construction allows to...