Conveners
Beyond II
- Celine Boehm (morning)
- Marcus Werner (afternoon)
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Prof. Marco Cirelli02/07/2019, 08:45
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Tomohiro Fujita (Kyoto University)02/07/2019, 10:00contributed talk
Identification of dark matter has been an outstanding problem in physics for decades, and axion (or axion like partciles) is its candidate with great motivations. A number of observations and experiments have tried to detect axion by using the axion-photon conversion by assuming the axion is coupled to photon, while no signal yet to be found. In this talk, I will discuss new techniques to...
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Dr Wei Xue02/07/2019, 10:50
In this talk, I will discuss the methods to search for dark matter or dark sector particles having the masses from GeV to the Solar Mass. We can probe their properties by colliders, neutrino or gamma ray experiments.
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Miguel D. Campos (King's College London)02/07/2019, 11:35contributed talk
Direct detection experiments relying on nuclear recoil signatures lose sensitivity to sub-GeV dark matter for typical galactic velocities. This sensitivity is recovered if there exists another source of flux with higher momenta. Such an energetic flux of light dark matter could originate from the decay of mesons produced in inelastic cosmic ray collisions. I present in this talk the dark...
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Soichiro Hashiba02/07/2019, 11:55contributed talk
Incorporating three generations of right-handed Majorana neutrinos to quintessential inflation, we construct a model which simultaneously explains inflation, dark energy, dark matter and baryogenesis. These right-handed neutrinos have hierarchical masses $M_3 \sim 10^{13}$GeV, $M_2 \sim 10^{11}$GeV, $M_1 \sim 10$keV and are produced by gravitational particle production in the kination regime...
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Aya IYONAGA, Bryce Cyr, Daniel Kristoffer Blixt, Emmanuel Frion, Francesco Pace, Jaksa Osinski, Jan Olle, Juho Lankinen, Laura Iacconi, Manuel Hohmann, Matteo Cinus, Michael Kenna-Allison, Mohammad Malekjani, SAMIR IRAOUI, Sebastián Bahamonde Beltrán, Tays Miranda de Andrade, Xin Ren, Yin Lu, Yun-Long Zhang02/07/2019, 12:15
1 minute 1 slide oral presentation;
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Prof. Shinji Mukohyama02/07/2019, 14:00
I will give an introductory review talk on extensions of general relativity, covering the following contents.
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1. Introduction
2. General relativity and Lovelock gravity
3. PPN formalism
4. EFT approach
5. Massive gravity
6. Summary -
Dr Drazen Glavan02/07/2019, 15:15
Lovelock's theorem asserts that the most general theory of gravity in D=4 space-time dimensions is given by the action containing the Einstein-Hilbert term and a cosmological constant. Already in D=5 an additional term is possible - the Gauss-Bonnet action - which in D=4 turns into a total derivative not contributing to dynamics. In general, the contribution of the Gauss-Bonnet action to...
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Prof. Anne-Christine Davis (DAMTP, Cambridge University)02/07/2019, 16:05
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Prof. Gregory Gabadadze02/07/2019, 16:50
Theories of massive gravity and their generalizations have been used for the description of the late time and early universe cosmologies. These theories however are strongly coupled at a certain low energy scale. We show how this problem can be avoided by embedding massive gravity and its generalizations into higher dimensional theories.
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Daniel Older02/07/2019, 17:35
dRGT theory is the unique ghost-free theory of massive gravity and it realizes a full nonlinear completion of the linear Fierz-Pauli theory for a massive spin-2 field. In addition to being an interesting field theoretic modification of General Relativity, it could potentially explain the late-time cosmic acceleration of our universe as an alternative to a small cosmological constant. However,...
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Dr Eugeny Babichev (Paris-Sud University)02/07/2019, 17:55contributed talk
I will discuss scalar-tensor models of gravity, which predict the spontaneous scalarization of neutron stars or/and black holes. In the cosmological setup, the scalar field responsible for scalarization is subject to a tachyonic instability during inflation as well as at other cosmological stages, depending on the model. The instability poses a problem for viability of such models. I will show...
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Dr Emir Gumrukcuoglu (Institute of Cosmology and Gravitation, Portsmouth)02/07/2019, 18:15contributed talk
Modified gravity theories are typically constructed in the Jordan frame, where the matter follows the geodesics of the metric. This is nothing more than a choice of field variable that leaves the observables intact. However recent developments in classical field theory revealed that fixing variables may affect how the fundamental assumptions in the theory building process are represented. For...
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Dr Tomohiro Fujita
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