Prof.
Josh Long
(Indiana University Physics Department, Bloomington, Indiana, USA)
01/08/2016 09:15
Many theoretical models of the most profound unexplained phenomena in the universe predict modifications to the inverse square law of gravity at sub-millimeter length scales, yet this law has not been tested below 50 microns and there could be forces of nature millions of times stronger than gravity acting at this range. Following a general introduction, I describe a series of experiments...
Dr
Yoshio Kamiya
(International Center for Elementary Particle Physicsand Department of Physics, Komamiya-group The University of Tokyo, Japan)
01/08/2016 10:15
We report on new experimental constraints on gravity-like fifth forces by measuring the angular distribution of cold neutrons scattering off atomic xenon gas. The results improve previous upper limits on Yukawa-type parametrization space in the 4 to 0.04 nm range by a factor of up to 10, which was published in PRL 114, 161101 (2015). In this presentation, we also discuss about our new plans of...
Prof.
Guillaume Pignol
(Laboratoire de Physique Corpusculaire et de Cosmologie Université Grenoble Alpes, Grenoble, France)
01/08/2016 11:15
The accelerating expansion of the universe has been recently discovered and confirmed. It is one of the most puzzling observation of modern cosmology: 70% of the energy budget of the Universe today has to be attributed to a completely unknown type of Dark Energy. One theoretical route to address this problem is to assume the existence of a cosmological scalar field, the quintessence, with...
Prof.
Eberhard Widmann
(Stefan Meyer Institute for Subatomic Physics Austrian Academy of Sciences Vienna, Austria)
01/08/2016 14:00
A measurement of the ground-state hyperfine structure (GS-HFS) of antihydrogen can become one of the most sensitive tests of CPT symmetry on an absolute scale due to the fact that it is a small quantity on the energy scale and can be measured to very high precision. For this reason the ASACUSA collaboration at the Antiproton Decelerator of CERN has chosen to perform a measurement of GS-HFS...
Dr
Sebastian Gerber
(CERN, Geneva, Switzerland)
01/08/2016 14:45
Antimatter experiments conducted at the Antiproton Decelerator (AD) at CERN address the fundamental questions why primordial antimatter is not observed in the present universe. The AEgIS collaboration aims at performing tests of the weak equivalent principle (WEP) by measuring the gravitational acceleration of antihydrogen atoms in the Earth’s gravitational field that are horizontally emitted...
Dr
Nicolas Leroy
(Laboratoire de l’accélérateur linéaire d’Orsay, Orsay, France)
01/08/2016 15:45
On September 14 2015 the two LIGO detectors registered at almost the same time an event consistent with gravitational wave emission by the merger of two black holes. The reconstructed waveform of the signal shows that the system was located at a distance of approximately 400 Mpc, with constituent masses of 36 and 29 M_sun. The final object is consistent with a mass of 62 M_sun and then...
