Phenomenology 2013 Symposium

Session

Neutrinos III

7 May 2013, 14:00

University of Pittsburgh

Conveners

Neutrinos III

• Irina Mocioiu (Pennsylvania State University)

175. sterile neutrino analysis of reactor-neutrino oscillation

Sin Kyu Kang (Seoul-Tech)

07/05/2013, 14:00

Sterile neutrinos are one candidate to explain anomalies in neutrino oscillations. The mass-difference-driving oscillation between flavors can be probed only within specific combinations of baseline and flight energy. For a neutrino whose mass is completely unknown, it is necessary to scan all available ranges in spectrum and all accessible baselines. Here, we present four-neutrino analysis of...

146. Decoherence effects from sterile neutrinos in short baseline oscillation experiments.

Louis Lello (University of Pittsburgh)

07/05/2013, 14:15

Oscillations of light Dirac and Majorana sterile neutrinos with $m_s \simeq eV$ produced in meson decays are suppressed through decoherence aspects arising from lifetime effects of the decaying mesons and the stopping distance of the charged lepton in short baseline experiments. We obtain the transition probability from production to detection via charged current interactions including these...

31. Sterile neutrino phenomenology at IceCube and in astrophysics

Dave Hollander (P)

07/05/2013, 14:30

We examine the effects of sterile neutrinos in a minimal 3+2 framework on flux measured in IceCube. The effects on flavor ratio measurements from astrophysical sources as a result of sterile neutrino mixing in this framework are also examined.

105. Looking for Nu Physics with PLANCK

Chiu-Tien Yu (UW-Madison)

07/05/2013, 14:45

Recent results from the PLANCK satellite provide the most stringent constraint on Neff, the effective number of degrees of freedom in the early universe. Non-standard neutrino interactions can affect the measurement of Neff. The Standard Model predicts Neff=3, while PLANCK measures Neff=3.3+/-0.5. I will discuss the implication of PLANCK's measurement on several new physics scenarios,...

118. MeV dark matter in the 3 + 1 + 1 model

Jinrui Huang (Los Alamos National Laboratory)

07/05/2013, 15:00

The existence of light sterile neutrinos in the eV mass range with relatively large mixing angles with the active neutrinos has been proposed for a variety of reasons, including to improve the fit to the LSND and MiniBooNE neutrino oscillation experiments, and reactor disappearance experiments. In ref. arXiv:1010.3970, it was shown that neutrino mixing with a heavier sterile neutrino, in the...

93. New Light Species and the CMB

Matthew Walters (Johns Hopkins University)

07/05/2013, 15:15

In the massless limit, the effects of new light species on the Cosmic Microwave Background can be parameterized in terms of a single number, the relativistic degrees of freedom. I will survey the set of natural, minimal models containing new light species and provide a map between the parameters of any particular theory and the predicted effective number of degrees of freedom. I will then use...