Talk detail

Participant	Gharibyan, Vahagn
Institution	DESY - Notkestraße 85 - Hamburg - Hamburg - Germany

Session	PS	Accepted		Order		Time
Talk	Oral abstract	Title	Planck scale gravity test with accelerators
Co-authors
Abstract	Quantum gravity predicts unusual properties of space-time at very short distances. In particular, near the Planck length, around 1E-35 m, empty space may behave as a crystal, singly or doubly refractive. However, this hypothesis remains uncheckable for any direct measurement since the smallest distance accessible in experiment is about 1E-19 m at the LHC. Here I propose a laboratory test to measure the space refractivity and birefringence predicted by quantum gravity. A sensitivity from 1E-31 m down to the Planck length could be reached at existent GeV and future sub-TeV energy lepton accelerators using laser Compton scattering. There are already experimental hints for quantum gravity signature at distances approaching the Planck length by 5-7 orders of magnitude, derived from SLC and HERA data. Dedicated experiments on this way may open a so far invisible quantum gravitational realm.

Session	QG2	Accepted	Yes	Order	4	Time	20'
Talk	Oral abstract	Title	Planck scale gravity test with accelerators
Co-authors
Abstract	Quantum gravity predicts unusual properties of space-time at very short distances. In particular, near the Planck length, around 1E-35 m, empty space may behave as a crystal, singly or doubly refractive. However, this hypothesis remains uncheckable for any direct measurement since the smallest distance accessible in experiment is about 1E-19 m at the LHC. Here I propose a laboratory test to measure the space refractivity and birefringence predicted by quantum gravity. A sensitivity from 1E-31 m down to the Planck length could be reached at existent GeV and future sub-TeV energy lepton accelerators using laser Compton scattering. There are already experimental hints for quantum gravity signature at distances approaching the Planck length by 5-7 orders of magnitude, derived from SLC and HERA data. Dedicated experiments on this way may open a so far invisible quantum gravitational realm.