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Daniel A Dwyer

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Daniel A Dwyer

 
Contact Information:
Email:

DADwyer@lbl.gov

Phone:510/486-4254
Building:050
Room:5002

Research:

I spend most of my time studying neutrinos. Neutral and nearly massless, neutrinos are the most elusive of the observed elementary particles.

Massive neutrinos tell us about the evolution of the universe since the Big Bang, how stars shine, and may give us clues about the nature of Dark Matter. In my Ph.D. thesis I measured the oscillation of reactor antineutrinos with the KamLAND experiment, which has provided the most direct evidence of neutrino flavor oscillation. My current focus is the Daya Bay experiment, which has recently reported the first clear measurement short-distance neutrino oscillation via the unresolved neutrino mixing angle θ13. The discovery of this neutrino mixing angle was named one of the top ten breakthroughs of 2012 by the journal Science. Intrigued by recent unexpected disagreements between reactor antineutrino measurements and predictions, I am also pursuing a precision measurement of the antineutrino energy spectra with the PROSPECT experiment.

 

Current Research:

In Sep. 2015 I joined the Particle Data Group in the Physics Division at Berkeley Lab.

In October I received the 2014 Henry Primakoff Award from the American Physical Society:

For innovative contributions to neutrino physics, particularly the broad and substantial role he played in commissioning, calibration and analysis in the Daya Bay measurement of the mixing angle theta-13.

On Oct. 18, 2013 the Financial Times listed me as one of their 10 next big names in physics.

On Aug. 21, 2013, we reported a measurement of both the amplitude and frequency of neutrino oscillation (press release, Symmetry.org news article, public presentation). This result strongly supports our current model of neutrino mass and quantum mechanical mixing.

On Mar. 8, 2012, we reported the first clear measurement of short-distance neutrino oscillation (paper: [arXiv:1203.1669], press releases: [Caltech, Interactions.org]). Below is an incomplete list of media coverage:

 

 

Education:

 

  • University of California, Berkeley; Berkeley, CA Aug. 2001{Jun. 2007

           Ph.D. in Physics, May 2007

          Thesis Advisor: Prof. Stuart Freedman

 

  • Massachusetts Institute of Technology; Cambridge, MA Aug. 1996{Jun. 2000

          BS in Physics, May 2000

         Thesis Advisor: Prof. Krishna Rajagopal

 

Publications:

  • D.A. Dwyer and T.J. Langford "Spectral Structure of Electron Antineutrinos from Nuclear Reactors," Phys. Rev. Lett. 114, 012502 (2015) [arXiv:1407.1281]
  • D.A. Dwyer "Antineutrinos from nuclear reactors: recent oscillation measurements," New J. Phys. 17, 025003 (2015) [doi:10.1088/1367-2630/17/2/025003]
  • Daya Bay Collaboration "Spectral measurement of electron antineutrino oscillation amplitude and frequency at Daya Bay," Phys. Rev. Lett. 112, 061801 (2014) [arXiv:1310.6732]
  • Daya Bay Collaboration "Observation of electron-antineutrino disappearance at Daya Bay," Phys. Rev. Lett. 108, 171803 (2012) [arXiv:1203.1669]
  • Daya Bay Collaboration "A side-by-side comparison of Daya Bay antineutrino detectors," Nucl. Inst. and Meth. 685, 78 (2012) [arXiv:1202.6181]
  • D.A. Dwyer et al. "Search for Sterile Neutrinos with a Radioactive Source at Daya Bay," Phys. Rev. D (2013) [arXiv:1109.6036]
  • S. Abe et al. "Precision Measurement of Neutrino Oscillation Parameters with KamLAND," Phys. Rev. Lett. 100, 221803 (2008) [hep-ex/0801.4589]
  • D.A. Dwyer "Precision Measurement of Neutrino Oscillation Parameters with KamLAND," Ph.D. thesis, University of California, Berkeley (2007) [pdf]
  • K. Eguchi et al. "First results from KamLAND: Evidence for reactor anti-neutrino disappearance," Phys. Rev. Lett. 90, 021802 (2003) [hep-ex/0212021]

 

Awards:

 

In October I received the 2014 Henry Primakoff Award from the American Physical Society:

For innovative contributions to neutrino physics, particularly the broad and substantial role he played in commissioning, calibration and analysis in the Daya Bay measurement of the mixing angle theta-13.

 

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