Torsten Soldner
(ILL)
11/10/2010, 11:00
Oral
Experiments with slow neutrons allow to test the Standard Model
of particle physics and theories of gravitation. I will review
recent experiments, in particular neutron decay studies, and
compare cold and ultracold neutrons.
Dr
Victor Ezhov
(Petersburg Nuclear Physics Institute RAS)
11/10/2010, 11:30
Fundamental physics with cold and ultracold neutrons
Oral
Precision measurements of the neutron lifetime provide stringent tests of the standard electroweak model as well as crucial inputs for tests of Big-Bang nucleosynthesis. The present world average of the neutron lifetime is dominated by results obtained using material bottles for UCNs. This average does not include a recent measurement performed at ILL which produced a value that is 6.5...
Dr
Ruediger Picker
(TU Muenchen Physik Department E18)
11/10/2010, 11:50
Precision measurements of fundamental constants
Oral
A precise knowledge of neutron lifetime opens the way to determine the coupling constants of weak interaction precisely and hence the element Vud of the Cabibbo-Kobayashi-Maskawa matrix. Hence, measurements of the lifetime provide direct tests of the standard model of particle physics. Moreover, the neutron lifetime is important for astrophysical models, especially Big Bang nucleosynthesis....
Mr
Alexey Fomin
(Petersburg Nuclear Physics Institute)
11/10/2010, 12:10
Low energy precision tests of the Standard Model
Oral
The analysis of the data on measurements of the neutron lifetime is presented. A new most accurate result of the measurement of neutron lifetime [Phys. Lett. B 605, 72 (2005)] 878.5 ± 0.8 s differs from the world average value [Phys. Lett. B 667, 1 (2008)] 885.7 ± 0.8 s by 6.5 standard deviations. In this connection the analysis and Monte Carlo simulation of experiments [Phys. Lett. B 483, 15...
Dr
Peter Geltenbort
(Institut Laue-Langevin)
11/10/2010, 12:30
Fundamental physics with cold and ultracold neutrons
Oral
Commercial water hoses with 6 to 8 mm inner diameter (flexible tubes made of a polyvinyl chloride plastic up to 3 m length) transmit surprisingly well ultracold and very cold neutrons. When covered with a thin layer of a liquid fluorine polymer a transmission probability of up to 85% per meter has been measured. Those flexible tubes may be used to make portable sources of ultracold and thermal...
