8,624 research outputs found
Bayesian quantile regression
Recent work by Schennach (2005) has opened the way to a Bayesian treatment of quantile regression. Her method, called Bayesian exponentially tilted empirical likelihood (BETEL), provides a likelihood for data y subject only to a set of m moment conditions of the form Eg(y, ?) = 0 where ? is a k dimensional parameter of interest and k may be smaller, equal to or larger than m. The method may be thought of as construction of a likelihood supported on the n data points that is minimally informative, in the sense of maximum entropy, subject to the moment conditions.
When a complementarity in the neutrino mixing meets a parameter symmetry and its implications
We present a complementarity that complements relationships among the
elements in the neutrino mixing matrix and address its physical implications.
First we show how a complementarity with a phase being introduced as an extra
parameter can be held in the nine independent schemes of parameterizing the
matrix introducing a discrete parameter symmetry and a combination of sine
functions, a part of Jarlskog invariant, within a certain size of uncertainty.
Then, for the first time, we show that we can use the uncertainty associated
with the complementarity as an empirical constraint complementing that among
the diagonal elements in the neutrino mixing matrix. We discuss its physical
implication in relation to the size of the uncertainty among the elements in
the end
When sound wave meets the neutrino anomaly
We propose that the sound wave coming to the inner side of Miniboone detector
could be one of the sources for our having the neutrino anomaly in the
experiment. We start with presenting a rough estimate for the size of the
energy associated with the sound wave coming into the detector, the size of the
loss of energy associate with the save wave as it travels down to the target
medium due to their gravitationally interacting with the sound wave in a
classical sense. After that, we describe that the neutrino anomaly could be due
to the sound wave interacting with the detector material under the pressure due
to the presence of the mineral oil and their producing phonon-induced electrons
via a process such as the thermionic emission, which may lead more events to be
identified as electron-like events in the experiment. We also address that the
sound wave may scatter with the electrons produced from the electron-photon
shower
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