By Gianluigi Fogli, Eligio Lisi, Antonio Marrone, Daniele Montanino, Antonio Palazzo
ESI Special Topics,
November 2003
Citing URL - http://www.esi-topics.com/nhp/2003/november-03-physics.html
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Gianluigi Fogli, Eligio Lisi, Antonio Marrone, Daniele Montanino, Antonio Palazzo
answer a few questions about this month's
new hot paper in the field of Physics.
From
•>>November 2003
Field:
Physics
Article Title: "Getting the most from the statistical analysis of solar neutrino oscillations - art. no. 053010"
Authors: Fogli,
GL;Lisi, E;Marrone, A;Montanino, D;Palazzo, A
Journal: PHYS REV D
Volume: 6605
Page: 3010-3010
Year: SEP 1 2002
* Univ Bari, Dipartmento Fis, Via Amendola 173, I-70126
Bari, Italy.
* Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
* Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
* Univ Lecce, Dipartimento Sci Mat, I-73100 Lecce, Italy.
* Ist Nazl Fis Nucl, Sez Lecce, I-73100 Lecce, Italy.
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Why
do you think your paper is highly cited?
Our paper analyzes in detail one of the most important phenomena
established by several particle physics experiments in recent years,
namely, solar neutrino flavor oscillations. Since solar neutrino
experiments are extremely difficult, it is very important to extract
from their precious data all the information which can be relevant
for particle physicists and solar
modelists. We have tried to
"squeeze" such pieces of information in the most effective
and reliable way we could—hence our title "Getting the most
from ..."—in order to provide a sort of reference work in the
field, and apparently we succeeded. We would like to emphasize,
however, that our work is part of a collective effort made by
literally thousands of theorists and experimentalists during several
decades of neutrino oscillation searches.
Does
it describe a new discovery or a new methodology that's useful to
others?
Yes. Our paper describes a systematic method for comparing
theoretical predictions and experimental data related to solar
neutrino oscillations, and applies it to get accurate information
and up-to-date results about neutrino properties. Several
researchers in the field have then adopted either the method, or the
results, or both.
Could
you summarize the significance of your paper in layman's terms?
Neutrinos, the lightest building blocks of matter, can belong to
three different species (or "flavors'', as we say in jargon):
electron, muon, and tau neutrinos. Transitions from one flavor to
another are strictly forbidden, if neutrinos are massless.
Experiments, however, have recently found compelling evidence that
neutrinos, originally produced in the Sun's core with electron
flavor, arrive at the Earth as a quantum superposition of all
different flavors (electron, muon, and tau): therefore, neutrinos
must have mass. In particular, the differences of squared masses of
neutrinos, and their so-called "mixing angles," completely
determine the properties of such quantum superpositions, i.e., the
oscillations from one flavor to another. In this general context,
our work aimed at reaching highly accurate and reliable estimates of
the solar neutrino mass-mixing parameters. In order to do so, we
used all the available and up-to-date experimental data, performed
precise calculations of the neutrino oscillation phenomenon,
evaluated all possible sources of uncertainties, and applied
advanced statistical techniques in comparing theoretical predictions
with experimental data. The results can be used as a
state-of-the-art framework to evaluate further improvements in the
determination of the solar neutrino mass-mixing parameters.
How
did you become involved in this research?
Since 1993, we have been carrying out an extensive research
program, aiming at a comprehensive theoretical interpretation of
neutrino oscillation properties, as derived from all the available
experimental results (not only from solar neutrino observations, but
also from other astrophysical and terrestrial measurements). This
paper was, for us, an important step forward in the developement of
such a systematic program.
Gianluigi Fogli
Full Professor of Theoretical Physics
Department of Physics and INFN
Bari, Italy
Eligio Lisi, Ph.D.
Senior Researcher in Physics
Istituto Nazionale di Fisica Nucleare (INFN)
Bari, Italy
Antonio Marrone, Ph.D.
Research grant recipient
Department of Physics and INFN
Bari, Italy
Daniele Montanino, Ph.D.
Researcher in Physics
Department of Materials Science and INFN
Lecce, Italy
Antonio Palazzo, Ph.D.
Research grant recipient
Department of Physics and INFN
Bari, Italy
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ESI Special Topics,
November 2003
Citing URL - http://www.esi-topics.com/nhp/2003/november-03-physics.html
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