October 6, 2015

COLLEGE PARK, MD – Two American Physical Society past prize winners received the 2015 Nobel Prize in Physics for their discovery that neutrinos can change from one type to another, confirming that the particles have mass.

"APS congratulates Takaaki Kajita and Arthur McDonald on the Nobel Committee's recognition of their important work on the behavior of neutrinos, and in particular the ability of the particles to change form, which indicates that neutrinos have mass,” said APS President Samuel Aronson. “The discovery has major bearing on the structure of the universe as well as the physics of the nucleus. APS is proud to have recognized both recipients in the past. Kajita received the APS W.K.H. Panofsky Prize in Experimental Particle Physics in 2002, while McDonald is both an APS Fellow and winner of the 2003 Tom W. Bonner Prize in Nuclear Physics."

The Nobel Committee noted three APS journal articles listed below as being critical to the prize citation. The APS has made the papers freely available to all readers.

Evidence for Oscillation of Atmospheric Neutrinos
Y. Fukuda et al. (Super-Kamiokande Collaboration)
Phys. Rev. Lett. 81, 1562 – Published 24 August 1998

Measurement of the Rate of νe + d → p + p +e Interactions Produced by 8B Solar Neutrinos at the Sudbury Neutrino Observatory
Q.R. Ahmad et al. (SNO collaboration)
Phys. Rev. Lett. 87, 071301 – Published 13 August 2001

Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in the Sudbury Neutrino Observatory
Q. R. Ahmad et al.
Phys. Rev. Lett. 89, 011301 – Published 13 June 2002

APS Media Contacts

General Media Inquiries

James Riordon
Head of Media Relations
(301) 209-3238

Tawanda W. Johnson
Press Secretary
(202) 662-8702

Matteo Rini
Media Relations, Journals

Using the APS Logo

Gray Arrow Logo Usage Guidelines

About APS

The American Physical Society is a non-profit membership organization working to advance and diffuse the knowledge of physics through its outstanding research journals, scientific meetings, and education, outreach, advocacy, and international activities. APS represents over 53,000 members, including physicists in academia, national laboratories, and industry in the United States and throughout the world. Society offices are located in College Park, MD (Headquarters), Ridge, NY, and Washington, D.C.