Ngee-Pong Chang

Area of Specialization

Theoretical High Energy Physics

Recent Area of Interest

Tritium beta decay experiments hint at  tachyonic mass for electron neutrinos. 

(http://www.physik.uni-mainz.de/exakt/neutrino/en_experiment.html )

m_n² c⁴ = - 1.6 ± 2.5_stat   ± 2.1_sys  eV²

Is there a consistent  field theory for such faster-than-light neutrinos ?  The answer is yes.

( http://arxiv.org/abs/hep-ph/0105153   Modern Phys Letters A 16, 2129 (2001) )

How does a tachyonic mass affect the endpoint of tritium β-decay ?

See http://arxiv.org/abs/hep-ph/0410175  for a complete field-theoretic treatment of the decay spectrum, including the complex energy modes of the tachyon pole. (new)

Major Positions Held

Professor, Physics Department, City College of CUNY, New York (1966 - )

Visiting Professor, Physics Department, City College of CUNY, New York (1965 - 1966)

Research Associate, Rockefeller University, New York (1964 - 1965)

Research Associate, Institute for Advanced Study, Princeton, New Jersey (1963 - 1964)

Research Associate, Columbia University, New York (1962 - 1963)

Minor Positions Held (Sabbaticals & Exchanges)

Nanyang Professor, Nanyang Technological University, Singapore (05-06)

Visiting Professor, Inst Physics, Academia Sinica, Taipei (7/93 - 8/93)

Visiting Professor, Max Planck Physics, Munich (6/92 - 7/92)

Visiting Professor, KEK, Japan (6/90 - 7/90)

Visiting Professor, Inst Estructura Materia, Madrid (6/85 - 7/85)

Visiting Professor, National U of Singapore (7/84 - 8/84)

Visiting Professor, KEK, Japan (7/83 - 1/84)

Visiting Scientist, CERN, Geneva (7/82 - 8/82)

Visiting Professor, Ecole Normale Superieure, Paris (2/82 - 6/82)

Fellow, Japan Society Promotion Science, U of Tokyo (3/74 - 5/74)

Fellow, Japan Society Promotion Science, Yukawa Inst, Kyoto (6/74 - 8/74)

Visiting Professor, Max Planck Physics, Munich (2/73 - 8/73)

Professor Etranger, CTP, CNRS, Marseilles (1972 Summer )

Academic & Professional Honors

Professional & Community Service

Member, Committee on International Scientific Affairs, APS, 1994 - 1996

Chair, Committee on International Scientific Affairs, APS, 1997

Editor, International Journal Modern Physics A, Modern Physics Letters A, 1994 -

Founder, Overseas Chinese Physics Association, 1990

Chair, Overseas Chinese Physics Association, 1991 - 1992, 1997-98

Vice-Chair, Asian-American Higher Education Council, 1994 –

Director , CCNY – China Exchange, 1981 - 

             Exchange relations with Chinese Academy of Sciences, and 5 key universities:

                                                Fudan, Shandong, Southeast, Xibei, and Zhongshan

Founder & Advisor , CCNY Asian Alumni Group, 1981 -

External Examiner, University of Malaya, Kuala Lumpur (93-95)

Selected Publications

Oscillations of Faster than light Majorana Neutrinos: A Causal Field Theory, Modern Phys Letters A 16, 2129 (2001) ; hep-ph/0105153 
Chiral Restoration in the Early Universe: Pion Halo in the Sky, Nucl Phys Proc Supp 43, 308 (1995)

 Spacetime Quantization of BPFTW Action: Spacelike Plasmon Cut & New Phase of the Thermal Vacuum, Phys. Rev. D51, 4512 (1995) 

Chiral Current at High Temperatures, Phys. Rev. D50, 5403 (1994) 

Nambu Goldstone Bosons & Dynamical Symmetry Breaking in QCD at High Temperatures, with L.N. Chang, Phys. Rev. D 45, 2988 ('92) 

Signature for Chiral Symmetry Breaking at High Temperatures, with L.N. Chang and K.C. Chou, Phys. Rev. D43, 596 ('91) 

Duality in compactified string theory, with D.X. Li, Phys. Rev. D42, 511 ('90) 

Evolution of Weinberg's Gluonic CP operator and Gauge Dependence, with D.X. Li, Phys. Rev. D42, 871 ('90) 

Cosmological Constant & the Asymmetric Orbifold, with D.X. Li, J. Perez-Mercader, Phys. Rev. Lett. 60, 882 ('88) 

STr M2 Sum Rule for A General Class of Kähler Potentials, with J. Leon, J. Perez-Mercader, Mod. Phys. Lett. A2 , 937 ('87) 

Bifurcation & Dynamical Symmetry Breaking in a Renormalisation Group Improved Field Theory, with L.N. Chang, Phys. Rev. Lett. 54, 2407 ('85) 

Renormalisation Group Analysis of Dynamical Symmetry Breaking in QCD, with L.N. Chang, Phys. Rev. D29, 312 ('84) 

Dynamical Generation of Fermion Masses, with D.X. Li, Phys. Rev. D30, 790 ('84) 

N=1 Supergravity with Nonminimal Coupling: A Class of Models, with S. Ouvry and X.Z. Wu, Phys. Rev. Lett. 51, 327 ('83) 

BRS and Decoupling, with A. Das, D.X. Li, D.C.Xian, X.J. Zhou, Phys. Rev. D25, 1630 ('82) 

Two Loop Analysis of sin2 q and MX, with X.Z. Wu, Phys. Rev. D25, 1425 ('82) 

B-L Nonconservation and Neutron Oscillations, with L.N. Chang, Phys. Lett. 92B, 103 ('80) 

Structure of the Vacuum and Neutron and Neutrino Oscillations, with L.N. Chang, Phys. Rev. Lett. 45, 1540 ('80) 

An Asymptotically Free, One Coupling Constant, One Mass Scale SU(5) Model, with A. Das and J. Perez-Mercader, Phys. Rev. D22, 1429 ('80) 

New Renormalisation Program for Broken Gauge Theories, with A. Das and J. Perez-Mercader, Phys. Rev. D22, 1414 ('80) 

Parity Test for New Generation of Mesons, with C.A. Nelson, Phys. Rev. D20, 2923 ('79) 

Yang's Parity Test for New Spin Zero Mesons, with C.A. Nelson, Phys. Rev. Lett. 40, 1617 ('78) 

Eigenvalue Conditions and Asymptotic Freedom for Higgs Scalar Gauge Theories, Phys. Rev. D10, 2706 ('74) 

Polya Distribution in a Parton Picture of High Energy Scattering, with L.N. Chang, Phys. Rev. D9, 660 ('74) 

Gauge Model of Weak and Electromagnetic Interaction with No Neutral Current or Heavy Leptons, with E. Ma, Phys. Rev. D7, 3808 ('73) 

A2 Meson as an O(4) Family, with C.A. Nelson, Phys. Rev. D2, 966 (’70) 

Feynman Rules for an O(4) Family with No Ghosts, with C.A. Nelson, Phys. Rev. D2, 959 ('70) 

Impact Parametrisation and Daughter Trajectories, with K.T. Mahanthappa, Nucl. Phys. B6, 200 ('68) 

Kinematics at Infinite Momentum, with H. Bacry, Annals Phys. 47, 407 ('68) 

On a Generalized Definition of P and C, Phys. Rev. Lett. 16, 337 ('66)