Bulletin of the American Physical Society
APS April Meeting 2012
Volume 57, Number 3
Saturday–Tuesday, March 31–April 3 2012; Atlanta, Georgia
Session W12: Invited Sesson: Neutrinos: The Wild Frontier |
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Sponsoring Units: DNP DPF Chair: Bruce Vogelaar, Virginia Polytechnic Institute and State University Room: Grand Hall East A/B |
Tuesday, April 3, 2012 10:45AM - 11:21AM |
W12.00001: Neutrinos as a probe of Earth's interior Invited Speaker: Yuri Efremenko It has been estimated that the Earth emits about 45 terawatts of a heat. A large fraction of this heat is generated inside the Earth by the decay of radioactive elements such as K, Th, U. During such decays low energy neutrinos are produced which freely propagate through the Earth. A new generation of low background, large volume detectors are capable of measuring the flux of these neutrinos. These detectors open a new window into the Earth's interior. The detection of these neutrinos from multiple locations on Earth can let us not only measure the total amount of radiogenic heat but will allow us, in the future, to do neutrino tomography of the Earth. I will review the present status and future perspectives in this field. [Preview Abstract] |
Tuesday, April 3, 2012 11:21AM - 11:57AM |
W12.00002: Solar Neutrinos in 2012: The End of Days? Invited Speaker: Gabriel Orebi Gann Huge strides have been made in the field of solar neutrinos in past decades, with the resolution of the solar neutrino problem providing clear evidence of neutrino oscillation. This has allowed us to move beyond the basic questions to a precision era, in which we can use the Sun to study neutrinos more closely, and neutrinos to study the Sun. Many questions yet remain unanswered: Will we be able to see the effects of matter on the oscillations, through observation of a Day/Night effect or the predicted vacuum/matter transition region in the solar neutrino survival probability? Does the flatness of the spectrum to-date indicate new physics to be discovered? What is the true heavy-metal content of the sun, and does it lead to a discrepancy between SSM predictions and helioseismological observations? Measurements of the low-energy solar neutrinos can answer these questions for us, but such measurements require a large, ultra-low-background detector capable of making a precision measurement at low energy thresholds. This talk will summarise the status of the field, and the experiments that will help us to shed light on these mysteries. [Preview Abstract] |
Tuesday, April 3, 2012 11:57AM - 12:33PM |
W12.00003: Neutrino Self-Refraction in Core-Collapse Supernovae Invited Speaker: Basudeb Dasgupta In recent years, we have understood that neutrinos in supernovae oscillate in unusual and interesting ways because their number densities are so large that they experience refraction due to each other. We explain this peculiar effect, often called ``Collective Oscillations,'' and discuss its impact on neutrino physics signatures and probes of supernova astrophysics at large underground detectors. [Preview Abstract] |
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