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Pran
Nath
Matthews Distinguished Professor of Physics
PhD Stanford University, 1964
(617)373-4669
nath@neu.edu
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Research
Summary:
While
the Standard Model of the electro-weak and strong interactions
is very successful, and consistent with all existing experimental
data, it has many intrinsic drawbacks. It contains a large
number of arbitrary parameters, suffers from the so called
hierarchy problem, i.e., that it is difficult to keep
the various mass scales apart in the theory, and it has
no unification with gravity. Super theories (i.e., theories
using supersymmetry, such as supergravity and superstrings)
have the potential of rectifying many of the shortcomings
of the Standard Model.
Professor
Nath's interest in super theories is one of long standing,
starting in mid seventies when he co-authored invention
of one of the first supergravity theories with Arnowitt
[Phys. Lett.B56, 177 (1975)] and with Arnowitt and Zumino
[B56, 81, 1975]. In the early eighties he co-authored
with Ali Chamseddine and Richard Arnowitt the first supergravity
grand unified model (mSUGRA) [Phys. Rev. Lett. 49, 970
(1982)]. This model predicts unification of the electroweak
and strong forces at a scale O(10^16 GeV). The very precise
data from the LEP supercollider indicates just such a
unification. Since the invention of this model there has
been an enormous further work in this direction both theoretical
and experimental. The mSUGRA model and its extensions
will be tested at future collider experiments.
Professor Nath has made several other seminal contributions
including work on effective Lagrangian's, the axial anomaly,
solution to the U(1) problem, analyses of proton stability,
studies of supersymmetric dark matter, studies of supersymmetric
contributions to the anomalous moment, and investigations
of strategies for the discovery of supersymmetry at colliders.
His recent interest has included studies of CP violation
with Tarek Ibrahim where they proposed the so called cancellation
mechanism for resolving the electric dipole moment problem
in supersymmetry.
Another
area of interest of Professor Nath is the construction
of unified particle physics models within string theory.
He has investigated a class of such models and has a long
range interest for future investigation in this area.
Recently with Raza Syed he has investigated unified models
based on SO(10) and they have succeeded in giving for
the first time a complete determination of the cubic and
quartic SO(10) invariant couplings. Professor Nath recently
received the prestigious Alexander von Humboldt Prize
for his basic contributions in supersymmetry and supergravity.
Recent Publications :
1. P. Nath and P. F. Perez, "Proton Stability in Grand Unified Theories, in Strings, and in Branes" Phys. Rept. 441, 191 (2007). http://dx.doi.org/10.1016/j.physrep.2007.02.010
2. "P. Nath and R. M. Syed, "Couplings of Vector-Spinor Representation for SO(10) Model Building," JHEP 0602, 022 (2006). http://dx.doi.org/10.1088/1126-6708/2006/02/022
3. T. Ibrahim and P. Nath, "Violation From Standard Model to Strings." [hep-ph] (For Reviews of Modern http://arxiv.org/abs/0705.2008v1
4. D. Feldman, Z. Liu, and P. Nath, "The Stueckelberg Z Prime at the LHC: Discovery Potential Signature Spaces and Model Discrimination," JHEP {\bf 0611}, 007 (2006). http://dx.doi.org/10.1088/1126-6708/2006/11/007
5. D. Feldman, B. Kors, and P. Nath, "Extra-weakly Interacting Dark Matter" Phy.\ Rev.\ {\bf 75}, 023503 (2007). http://dx.doi.org/10.1103/PhysRevD.75.023503 |
