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Physics of fundamental Symmetries and Interactions - PSI2016

16–20 Oct 2016
Europe/Zurich timezone

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Session

Tu - 1

18 Oct 2016, 09:00

Conveners

Tu - 1

  • N. Saito

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  1. 170. Gauge flavor symmetry, flavor structure and flavor violation
    Prof. Zurab Berezhiani (Univ. L'Aquila and Gran Sasso National Laboratories)
    18/10/2016, 09:00
    Searches for symmetry violations and new forces
    Oral
    I discuss the gauge flavor symmetry (SU(3) and its modifications) between three fermion families. The mass hierarchy between families and the pattern of mixing angles is determined by the breaking pattern of this symmetry which can also lead to predictive schemes. I shall discuss the properties of flavor gauge bosons which should generically induce flavor-nondiagonal couplings, the...
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  2. 151. Progress toward a new beam measurement of the neutron lifetime
    Dr Maynard Dewey (NIST)
    18/10/2016, 09:30
    Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
    Oral
    Neutron beta decay is the simplest example of nuclear beta decay. A precise value of the neutron lifetime is important for consistency tests of the Standard Model and Big Bang nucleosysnthesis models. There is currently a disagreement between measurements of the neutron lifetime made using the cold neutron beam method and ultracold neutron storage methods. A new measurement of the neutron...
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  3. 185. UCNtau: a measurement of the neutron lifetime using ultra-cold neutrons stored in an asymmetric magnetic trap
    Dr Christopher Morris (Los Alamos)
    18/10/2016, 09:50
    Low energy precision tests of the Standard Model
    Oral
    Recent measurements of the neutron lifetime have individually reported uncertainties of about 1 s but disagree by as much 7 s, resulting in a shift of about 6.5 sigma in the accepted value over recent years. Measurements based on the decay in flight of cold neutron beams appear to yield longer lifetimes than those based on counting surviving ultra-cold neutrons after storage in material-walled...
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  4. 172. The aSPECT Experiment - an overview and latest results
    Dr Marcus Beck (for the aSPECT collaboration - Helmholtz-Institut Mainz and Johannes Gutenberg Universität Mainz)
    18/10/2016, 10:10
    Fundamental physics and precision experiments with muons, pions, neutrons, antiprotons, and other particles
    Oral
    The aSPECT retardation spectrometer measures the beta−neutrino angular correlation coefficient a in free neutron-decay. This measurement can be used to determine the ratio gA/gV of the weak coupling constants, as well as to search for physics beyond the Standard Model. In 2013 aSPECT had a successful beam time at the Institut Laue-Langevin. The goal of this beam time is to improve the current...
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