Jordan A. Goodman

Ph. D. Physics University of Maryland 1978


Professor and Chair

Department of Physics

University of Maryland


Office – Room 1117 Physics Building

Phone – 301 – 405 - 5946

Fax – 301- 405 – 0327

Email –



Jordan Goodman is a professor and the Chair of Physics Department at the University of Maryland. His area of research, Particle Astrophysics, studies cosmic radiation to better understand the properties of elementary particles and the processes in space that produce these particles. This field blends elements of high energy physics and astrophysics.


Starting with his Ph.D. work, which showed evidence for an abundance of heavy elements such as iron in high energy cosmic rays, he has worked to understand the nature of cosmic rays which hit the earth. Recently, his work has concentrated on two experimental efforts--Super-Kamiokande and Milagro.



Super-Kamiokande is a 50,000 ton ring-imaging water Cerenkov detector located at a depth of 2700 meters water equivalent in the Kamioka Mozumi mine in Japan. Super-K was designed to search for proton decay, and to study  atmospheric  and solar neutrinos. Super-K has found evidence of the transformation of muon type neutrinos to tau type neutrinos. This is strong evidence that neutrinos have a small, but finite mass. 

More information on Super-K can be found at







Milagro is located in the mountains of New Mexico and is designed to study high energy gamma-rays from space. Dr. Goodman is the scientific co-spokesman for Milagro.


Milagro is the first gamma ray detector capable of continuously monitoring the entire overhead sky at energies below 1 TeV.  The energy threshold of Milagro is an order of magnitude lower than any other all-sky instrument operating in the VHE regime.  Milagro is the ideal instrument to study the transient and variable sources of VHE gamma rays in the Universe and to discover new phenomena. 


The Milagro detector will be used to:


·        Search for gamma-ray bursts emitting TeV gamma rays. 

·        Search for nearby active galactic nuclei (AGN). 

·        Search the Northern Hemisphere sky for sources of TeV gamma rays.

·        Search for primordial black holes (PBH).

·        Observe  the Crab with Milagro.

·        Study the properties of the solar magnetic field.

More information on Milagro can be found at



Future Directions – SNAP


Dr. Goodman and members of the particle astrophysics group at the University of Maryland have joined the SNAP experimental team. SNAP is the SuperNova Acceleration Probe SATellite. The SNAP’s science objective is to obtain a high statistics calibrated dataset of Type Ia supernovae to redshifts of 1.7 with excellent control over systematic errors. From this dataset we expect to obtain a 2% measurement of the mass density of the universe, a 5% measurement of the vacuum energy density, a 5% measurement of the curvature, and a 5% measurement of the equation of state of the "dark energy" driving the acceleration of the universe. More information on SNAP can be found at


Dr. Goodman is a fellow of the American Physical Society, a 1999/2000 University of Maryland Distinguished Scholar Teacher and a winner of the USM Regents award for excellence in teaching.



Recent Publications


Evidence For Oscillation Of Atmospheric Neutrinos.

By Super-Kamiokande Collaboration (Y. Fukuda et al.). Jul 1998. 9pp.

Published in Phys.Rev.Lett.81:1562-1567,1998

e-Print Archive: hep-ex/9807003


Measurement Of The Solar Neutrino Energy Spectrum Using Neutrino Electron Scattering. By Super-Kamiokande Collaboration (Y. Fukuda et al.). Dec 1998. 12pp. Published in Phys.Rev.Lett.82:2430-2434,1999 e-Print Archive: hep-ex/9812011


Search For Proton Decay Through P ---> Anti-Neutrino K+ In A Large Water Cerenkov Detector.

By SuperKamiokande Collaboration (Y. Hayato et al.). ICRR-REPORT-453-99-11, Apr 1999. 6pp. Published in Phys.Rev.Lett.83:1529-1533,1999


Observation Of The East - West Anisotropy Of The Atmospheric Neutrino Flux. By SuperKamiokande Collaboration (T. Futagami et al.). ICRR-REPORT-443-99-1, Jan 1999. 8pp. Published in Phys.Rev.Lett.82:5194-5197,1999


Tev Observations Of Markarian 501 With The Milagrito Water Cerenkov Detector. By Milagro Collaboration (R. Atkins et al.) Ap. J. Lett 525:L25-L28, 1999 Nov. 1


Evidence For Tev Emission From GRB 970417a.

By Milagro Collaboration (R. Atkins et al.). The Astrophysical Journal, 533:L119-L122, 2000 April 20 /. e-Print Archive: astro-ph/0001111