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Prof Ngangkham Nimai Singh

Designation: Professor

Specialization: Theoretical High Energy Physics (HEP)

Contact: +91-9435011619

Email: nimai03 [AT] yahoo.com

MSc, MPhil, Ph.D. (Delhi University)

Profile of Ngangkham Nimai Singh

(updated on 01.01.2023)


Full Name and designation (from Dec.4, 2013 onward) at Manipur University :

Prof. Ngangkham Nimai Singh

Former Head, Department of Physics (during the period: 2017-2020)

Manipur University, Canchipur -795 003, Imphal


Previous Employment details (22 years at Gauhati University,GU)

Lecturer on 6.12.1991 at Gauhati University

Reader on 13.10.2000 at Gauhati University

Professor on 31.07.2007 at Gauhati University

(Former Head, Dept. of Physics, GU during November,2010- October, 2013)

Joined in Manipur University as Professor of Physics on December 4, 2013.


Administrative assignments:

  • Controller of Examination(I/C), Manipur University (1.9.2020 – till date),

  • PAC Member for International Cooperation/physics, DST, New Delhi for three years from 7.7.2022.

  • President, Physics Academy of North East (PANE), 2021-2024.

  • Founder Executive member and Convener, Research Institute of Science and Technology (RIST), Imphal.

  • Founder Executive member of the North East Academy of Sciences (NEAS), Imphal.


Address (Institutional):

Department of Physics

Manipur University

Canchipur - 795003, Imphal, India

Mobile: +91 9435011619

E-mail: nimai03 [AT] yahoo.com


Permanent home Address:

Khurai Konsam Leikai, P.O. - Lamlong

District: Imphal East, PIN - 795010, Imphal

Manipur, India.


Qualifications and distinctions:

  • Three-Year All India Hr. Sec. (Sc.) from CBSE, New Delhi (1975)

  • Pre-Univ. II year (Sc.) from Gauhati University (1976)

  • B.Sc (H) in Physics from Delhi University ( 1979)

  • M.Sc. in Physics from Delhi University (1981)

  • M.Phil in Physics from Delhi University (1984)

  • Ph.D.in Physics from Delhi University (1989) (Supervisor: Prof. A. N. Mitra)

  • Lecturer in Rajdhani College and K.M. College, Delhi University

  • Reseach Associate (Department of Physics and Astrophysics, Delhi


  • Research Associate (CSIR) at Manipur University ( up to November,1991)

  • Awarded the Commonwealth Fellowship at Southampton University, United Kingdom for one year (1.10.1999-30.09.2000).

  • Member of All India Theoretical Physics seminar Circuit, 2004-2005,

  • Visiting Associate of the Physical Research Laboratory (PRL), Ahmedabad during 14.2.02-14.2.2004.

  • Regular Associate of the Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy, for eight years, viz., (1.1.2003 - 31.1.2010)


Research interest:

Theoretical High Energy Physics (HEP): Physics related to Higgs Fields, Physics of beyond Standard Model: Grand Unified Theories (GUTs) and Neutrino Physics – Origin of Neutrino masses and mixings; Baryogenesis through Leptogenesis; Relativistic Few-Quark Dynamics – Bethe Salpeter (BS) Dynamics and Light Cone Physics.


Responsibility/Course conducted in M.Sc. courses Teaching:

Classical Mechanics, Quantum mechanics and Advance Quantum Mechanics;

High Energy Physics, Quantum Field Theory; Advance Mathematical physics, Statistical Mechanics; pre-Ph.d. Coursework: research methodology, ICT, IPR and Patent laws, Journal Impact factors, Linux operating system and Latex, computer programming.in fortran, etc.


A. Names of scholars who have completed Ph.D.degree under my supervision:

1. Dr. Soibam Birmani Singh,GU

2. Dr. Mahadev Patgiri,GU

3. Dr. Mrinal Kumar Das,GU

4. Dr. Amal Kumar Sarma,GU

5. Dr. Monisa Rajkhowa,GU

6. Dr. H. Zeen Devi,GU

7. Dr. Arup Bharali,GU

8. Dr. Ng. K. Francis,GU

9. Dr. Nabaratna Bhagawati,GU

10. Dr. Chandan Duarah,GU

11. Dr. Subhankar Roy,GU

             12. Dr. Hangshadhar Rajbongshi, GU

13. Dr. Manorama Bora,GU

14. Dr. Ch. Satyananda Singh(co-guide), GU

15. Dr. K. Sashikanta Singh,GU


Scholars who are undergoing Ph.D. works at MU:

  1. Kh. Helensana Devi, MU

  2. Mayanglambam Kishan Singh, MU

  3. Victoria Puyam, MU

  4. Y. Monitar Singh, MU

  5. Ph. Wilina, MU



Some outreach Activities:

  • Former General Secretary, Physics Academy of the North-East (PANE)

  • Founder member of Research Institute of Science and Technology (RIST), Imphal

  • Founder member of the Manipur Association for the Promotion of Sciences (MAPS) and its publication People’s Science Network (PSN).

International Research Project:

Member of the international project: UK-INDIA EDUCATION AND RESEARCH INITIATIVE: Project Title: Neutrino and the Fundamental Laws of Nature, (2012)

As Editor of Journals:

  1. Associate Editor of the issue of Technical Journal of Assam Science Society, Vol.39, No.1,2, Dec.1997,

  2. Editor of HORIZON Vol.3, 2005 published by Physics Dept, Gauhati University,

  3. Editor of the People’s Science Network (PSN), Vol.3, No.3, Vol.4, No.2 and Vol.4 No.3, 2005, published by the Manipur Association for the Promotion of Sciences (MAPS), Imphal.

As a tutor in JRF/NET Training Courses:

Extensive lectures and training courses conducted in the Department of Physics, G.U. as extended service.

On popularization of Science: Participated in the All India Children Science Congress, Guwahati as Judge, and expert member in the Jagadish Chandra Bose National Science Talent Scholarship, Kolkata

Brief account of research work

My research work can be briefly described into three separate phases:

  1. A QCD motivated relativistic few-quark dynamics in light front coordinates within the framework of covariant Bethe-Salpeter equation (BSE),

  2. Low-energy observable predictions from left-right symmetric Grand Unified Theories (GUTs) such as SO(10) and higher rank groups in particular, with or without supersymmetry,

  3. Understanding tiny neutrino masses of three flavours of neutrinos and their mixing angles at low energy scales.

First Phase:

The research work in this phase (1984-1995) is centred around a specific model of hadrons in terms of quark composites – a QCD-motivated relativistic few-quark dynamics based on the covariant Bethe-Salpeter Equation (BSE) in the light-front (Null-Plane) coordinates. The model is characterized in a two-tier fashion where the first tier corresponds to a three-dimensional reduction of a four-dimensional Bethe Salpeter Equation through a Null-Plane ansatz in order to facilitate a good contact with mass spectra of the hadron composites. This stage is referred to as on-shell test of the model. The reduced BSE is shown to obey an explicit Null-Plane (NPA)-Covariance where the resulting covariant three-dimensional BS wave function thus qualifies for the applications involving hadrons in arbitrary motion. The second tier constitutes a reconstruction of the four-dimensional BS wave amplitude which incorporates the covariant hadron-quark vertex function from the covariant three-dimensional BS wave function. This is possible through the incorporation of the virtual sea-quark effects (higher Fock states) through the lowest order Feynman diagrams. This stage is referred to as off-shell tests of the model. With the help of such four-dimensional BS amplitude, various electromagnetic and hadronic transition form factors can be calculated in the usual field theoretic method. The formalism had been tested through actual calculations, viz., starting from low energy applications to high energy transition decay processes on one hand and from light to heavy flavours of quarks on the other. The applications include the mass spectra of hadrons both for light and heavy flavours, transition form factors and hadronic decay rates, the structure functions and fragmentation functions. The present model is comparable to other contemporary QCD-motivated models available in the literature in terms of its comprehensive conceptual framework and predictive power.

Second phase:

In this second phase (1996 onwards) the author has been doing theoretical research work in the field of gauge theories of fundamental interactions in general, and the left-right symmetric Grand Unified Theories (GUTs) with and without supersymmetry, such as SO(10) model and models based on higher rank groups in particular. One of the objectives is the calculation of the low-energy observable predictions in these models. Our research papers are connected with the renormalization of the neutrino masses with uncertainties in SUSY S)(10) model, and the question of the third generation Yukawa couplings unification at both intermediate scale and GUT scale. The analysis is extended to non-SUSY SO(10) model with one Higgs doublet model and two-Higgs doublet model.

Third phase:

The research work of the author in this phase is also related to the question of understanding the tiny masses of three flavours of neutrinos and their mixing angles at low energy scales. This is needed for the explanation of the deficits in the observed solar and atmospheric neutrino fluxes as compared to the theoretical predictions. In the present work there is an attempt to generate possible textures of neutrino mass matrices and leptonic mixing matrices from GUTs with extended U(1) family symmetry, and this can explain the observed data on neutrino masses and mixings. Further studies are made on the stability of the neutrino mass eigenvalues and mixing angles under Renormalisation Group equations (RGEs) in running from high energy scale to low energy scale. The asymmetric decay of the right-handed heavy neutrinos in the early universe, is responsible for leptogenesis in the Universe. Baryogenesis is formulated from leptogenesis through sphaleron transition process. At the moment the author is actively engaged in the application of neutrino physics for the explanation of matter-antimatter asymmetry, and also application of discrete symmetry groups for the explanation of the origin of neutrino masses and mixings. Some unfinished agenda in neutrino physics are - the type of neutrino whether Dirac or Majorana and CP violation in neutrino sectors. The field is exciting with full of uncertainties.




Research Publications in referred journals:


  1. Bethe-Salpeter dynamics for two-photon processes;

    • A.N.Mitra, N.N.Singh, and R.Ramanathan,

    • Pramana, 24(1985)95.

  2. Null-plane dynamics for few-quark systems;

    • N.Nimai Singh, Y.K.Mathur, and A.N.Mitra,

    • Few-body systems, 1(1986)47.

  3. Understanding single meson production in electron-positron annihilation in a Bethe-Salpeter model;

    • A.N.Mitra, A Pagnamenta, and N.N.Singh

    • Phys.Lett.B196(1987)212.

  4. Understanding electroweak couplings of the pion as quark-antiquark composite;

-A.N.Mitra, A.Pagnamenta and N.N.Singh,

    • Phys.Rev.Lett.59(1987)2408.

  1. Hadronic transition amplitudes under Null-Plane Bethe-Salpeter Dynamics,

    • N.Nimai Singh and A.N.Mitra,

    • Phys.Rev.D38(1988)1454.

  2. Null-Plane Bethe-Salpeter Dynamics…;

    • Nimai Singh Ngangkham, K.K.Gupta, A.N.Mitra,

    • Proc., HADRON ’89 (Ajaccio 1989)403-416.

  3. Hadron Spectroscopy and form factors at quark level;

-S.Chakrabarty, K.K.Gupta, N.N.Singh, and A.N.Mitra;

- Progress in Particles and Nuclear Physics, 22(1989)43.

  1. Null-Plane Bethe-Salpeter dynamics: mass spectra, decay constants of pseudoscalar mesons and pion form factor;

    • K.K.Gupta, A.N.Mitra, and N.N.Singh,

    • Phys.Rev.D42(1990)1604.

  2. The decay constants of heavy-light mesons in a two-tier Bethe-Salpeter model;

    • A.Pagnamenta, K.K.Gupta, A.N.Mitra, and N.N.Singh;

    • Journal of Phys. G: Nucl.and Partl Physics, G16(1990)677.

  3. Lorentz-covariance of hadron-quark vertex function in Bethe-Salpeter dynamics,

    • N.Nimai Singh, S.Biramani Singh;

    • J.As.Sc.Soc. 37(1995)141.


  1. Beyond the standard model: Working group report;

    • B. Ananthanarayan et al.,

    • Pramana, 51(1998)305.

  2. Renormalization of the seesaw neutrino masses at low energies in the minimal supersymmetric standard model;

    • N.Nimai Singh, S.Biramani Singh;

-Proc.,of the North-East Phys.Academy, IIT, Guwahati, (1998)27.

13.New uncertainties in QCD-QED rescaling factors;

    • N.Nimai Singh, S.Biramani Singh,

Gau.Univ.Journal of Science, Golden Jubilee Vol.1(1998)15.

  1. Third generation Yukawa couplings unification in supersymmetric


-N.Nimai Singh,S.Biramani Singh,

- European Journal of Phys. 5(1998)363.

14. Low-energy formulas for neutrino masses with tan(beta) dependent hierarchy;

    • M.K.Parida and N.Nimai Singh;

    • Phys.Rev.D59(1999)032002;

16. Low-energy radiative corrections to seesaw formulae for neutrino masses in SO(10) model.

    • S. Biramani Singh, N. Nimai Singh;

    • Journal of Phys.G25(1999)1009.

17. Lepto-quark unification scale in SUSY SO(10) GUT;

    • N.Nimai Singh, S.Biramani Singh;

    • Indian J.Phys.A73(3)(1999)439.

18. Renormalisation of seesaw neutrino masses in the standard model with two-higgs doublets;

    • N.Nimai Singh, S.Biramani Singh;

    • Pramana J. Phys. 54(2000)235.

19. Renormalisation group analysis of single right-handed neutrino dominance;

    • S. F. King, N.Nimai Singh,

    • Nucl. Phys. B591(2000)3;

20. Inverted hierarchical models of neutrino masses;

    • S.F.King, N.Nimai Singh;

    • Nucl. Phys. B596(2001)81;

21. Effects of the scale-dependent vacuum expectation values in the renormalisation group analysis of neutrino masses;

    • N.Nimai Singh;

    • Eur. J.Phys. C19(2001)137;

22. Bimaximal mixings from the texture of the right-handed Majorana neutrino mass matrix; -N. Nimai Singh, Mahadev Patgiri;

    • Intl. J. Mod. Phys.A17(25)(2002)3629;

23. Degenerate and inverted hierarchical models of Majorana neutrinos from seesaw mechanism;

    • N. Nimai Singh, Mahadev Patgiri;

    • Indian J. Phys.76A(5)(2002)423;

24. LMA MSW solution from the inverted hierarchical model of neutrinos;

    • Mahadev Patgiri, N. Nimai Singh,

    • Indian J. Phys.77A(3)(2003)267-273;

25. Right-handed Majorana Neutrino mass matrices for generating bimaximal mixings in degenerate and inverted models of neutrinos;

    • Mahadev Patgiri, N. Nimai Singh;

    • Intl.J. Mod. Phys. A18(5)(2003)743-753;

26. Predictive framework with a pair of degenerate neutrinos at high scale;

    • Anjan S. Joshipura, Saurabh D. Rindani, N. Nimai Singh,

    • Nucl. Phys.B660(2003)362-372;

27. Inverted hierarchical model of neutrino masses revisited;

    • Mahadev Patgiri, N.Nimai Singh,

    • Phys. Lett. B567(2003)69-72;

28. Numerical consistency ckeck between two approaches to radiative corrections for neutrino masses and mixings;

    • Mrinal K.Das, Mahadev Patgiri, N. Nimai Singh,

    • Pramana J. Phys.65(2005)995;

29. New uncertainties in QCD-QED rescaling factors using Quadrature method;

    • Mahadev Patgiri, N. Nimai Singh

    • Pramana J.Phys.65(2005)1015;

30. Discriminating neutrino mass models using type II seesaw formula;

    • N. Nimai Singh, Mahadev Patgiri, Mrinal K. Das;

    • Pramana J.Phys. 66(2006)361

31. Possible radiative generation of $bigtriangleup m^2_{21}$ and

$theta_{13}$ revisited;

- Monisa Rajkhowa, Mrinal K. Das and N.Nimai Singh

- Indian J. Phys. 80(8)(2006)829;

32. Lowering solar mixing angle in inverted hierarchy without charged lepton corrections;

- N.Nimai Singh, Monisa Rajkhowa and Abhijit Borah;

- J.Phys.G: Nucl.Part.Phys.34(2007)345;


33. Type-II seesaw mass model and baryon asymmetry;

- Amal Kr. Sarma, Hijam Zeen Devi, and N.Nimai Singh;

- Nucl.Phys.B765(2007)142-153.


34. Baryogenesis from inverted hierarchical mass model with tribimaximal mixings;

- Amal Kumar Sarma and N.Nimai Singh;

- Indian Journal of Physics, 81(2007)389-394.

35. Deviation from tri-bimaximal mixings in inverted and normal hierarchical neutrino mass models;

-N.Nimai Singh, Monisa Rajkhowa and Abhijit Borah;

- Pramana J.Physics 69(2007)533-549;


36. Discrimination of neutrino mass models,

- N. Nimai Singh, H. Zeen Devi, Amal Kumar Sarma,

- Indian Journal of Physics, 84(6)(2010)751-755,

37. Baryogenesis from neutrino mass models with tribimaximal mixings,

- H. Zeen Devi, N. Nimai Singh,

- Proc. Of 53rd annual Technical session of A. S. S., vol.19 (2008)309 ,

38. Estimation of baryon asymmetry of the universe in thermal and non-thermal leptogenesis scenario from normal hierarchical neutrino mass models,

- H. Zeen Devi, N. Nimai Singh,

- Proc. XVIII DAE-BRNS symposium on HEP, 2008 at BHU, Vanarasi, India.

39. Validity of the degenerate neutrino mass model,

- H. Zeen Devi, Abhijit Bora, N. Nimai Singh,

Research in physics in North East India, Vol.1(2010) 59-63,

40. Survival of neutrino mass models in non-thermal leptogenesis,

- Amal Kumar Sarma, H. Zeen Devi, N. Nimai Singh

- World Academy of Science, Engineering and Technology,


41. Quasi-degenerate neutrino masses with normal and inverted hierarchy,

- Ng. K. Francis, N. Nimai Singh,

-Journal of Modern Physics (JMP), Vol2, (2011)1280-1284.

42. Survival of the three-fold quasi-degenerate neutrino mass model with CP odd parity,

- N. Nimai Singh,

- Nuclear Physics B (Proc. Suppl.) 229-232 (2012) p 465


43. Constraints on the validity of neutrino mass models through thermal and non-thermal leptogenesis,

- Ng. K. Francis and N. Nimai Singh, H.Zeen Devi, A.K. Sarma,

- International Journal of applied Physics (IJAP),Vol.1, No.2, (2011)


44. Validity of quasi-degenerate neutrino mass models and their predictions on baryogenesis.,

- Ng. K. Francis, N. Nimai Singh,

-Nuclear Physics B86(2012)19.

45. Charged lepton contributions to bimaximal and tri-bimaximal mixing for

generating .

- Chandan Duarah, Abhijit Das, N. Nimai Singh,

- Phys. Lett. B718 (2012)147.

46. Expansion of and Neutrino mass matrix in terms of for Inverted Hierarchical case,

- Subhankar Roy and N. Nimai Singh

- Journal of Modern Physics (JMP), 4(2013)495-500.

47. A new method of parametrization of neutrino mass matrix through breaking of mu-tau symmetry: Normal hierarchy;

- Subhankar Roy and N. Nimai Singh,

- Intl. J. Eng. And Applied Sciences, Vol.2 No.1 (2013) p63

48. Construction of exactly solvable ring-shaped potentials;

- Arup Bharali and N. Nimai Singh

- Journal of Modern Physics, 4(2013)463-467.

49. Generation of exact analytic solutions of a new class of ring-shaped potentials,

- Arup Bharali, N. Nimai Singh

- Horizon- A journal of Physics, Vol.2 (2012)1.


50. Degenerate neutrino mass models revisited,

- N. Nimai Singh, C. Duarah, H. Z. Devi, A. Borah, S. S. Singh

- European Intl. Journal of Science and Technology, 2(2)(2013)81-90.; Horizon-A journal of Physics, Vol.2(2012)26.


51. Dependence of solar mixing angle on CP violating phase $delta$ under deviation from tri-bimaximal mixing,

- Chandan Duarah and N. Nimai Singh

- Indian Journal of Physics (IJP), 2013 (published electronically DOI:10.1007/s12648-013-0361-x)).


52. Bi-Large neutrino mixing with charged lepton correction;

- Subhankar Roy, N. Nimai Singh

- Horizon- A journal of Physics, Vol.2 (2012)65;

Indian Journal Physics,88(5)(2014)513-519; DOI 10.1007/s12648-014-0446-1


53. Search for possible forms of lepton mixing matrix UPMNS;

- N. Nimai Singh

- Nuclear Physics B (Proc. Suppl) (2014) (to appear).

(Invited talk in Intl. conference on Light-Cone Physics(LC-2012): Hadronic and Particle Physics, New Delhi, India)


54. On the ambiguities in the tri-bimaximal mixing matrix and corresponding charged lepton corrections.

- Chandan Duarah, N. Nimai Singh

- Physica Scripta,88(2013)065101


55. A transformation method to construct family of exactly solvable potentials in quantum mechanics

- Nabaratna Bhagawati, N. Saikia, N. Nimai Singh

- Acta Physica Polonica B44(8) (2013)1711.


56. Method for mapping of exactly analytic S-Wave solutions for regenerated central hyperbolic potentials.

- Arup Bharali, Ngangkham Nimai Singh

- Acta Physica Polonica B44(10)(2012)1001.


57. A model independent investigation on quasi-degenerate neutrino mass models and their significance,

- Subhankar Roy and N. Nimai Singh

- Nuclear Physics B877 (2013)321-342


58. New frontiers in neutrino physics,

- N. Nimai Singh

- Journal of Physics – Conference Series (JPCS), 481(2014)012002, published by IOP, U.K.


59. Generation of exactly solvable potentials of position-dependent mass Schrodinger equation from Hulton potential;

- Hangshadjhar Rajbongshi, and Ngangkham Nimai Singh

-Journal of Modern Physics,4(2013)1540-1545.


60. Bi-Large neutrino mixing with charged lepton correction

- S. Roy and N Nimai Singh;

- Indian J. Physics (May 2014) 88(5):513-519.


61. Search for possible forms of neutrino mixing matrix U(PMNS),

- Nuclear Physics B (Proc. Suppl.) 251-252 (2014)135-140.;

-N. Nimai Singh.


62. Exact S-wave solution of Schrodingetr equation generared from generalized Hulthen potential,

- Indian Journal of Physics, 88(10)1081-1085(2014).

- N. Bhagawati and N. Nimai Singh.


63. Generation of new exactly solvable potentials of position-dependent mass Schrodinger equation by extended transformation method,

- Acta Physica Polonica B45(2014)1701.,

- H. Rajbongshi and N. Nimai Singh.


64. Modulated bimaximal neutrino mixing,

- Phys. Rev. D92,036001(2015),

- S. Roy and N. Nimai Singh.


65. Mixing angle as a function of neutrino mass ratio, Phys. Rev. D91,096003(2015); S. Roy and N. Nimai Singh.


66. The Cabibbo angle as a universal seed for quark and lepton mixings,

- Phys. Lett. B748(2015)1-4,

- S. Roy, S. Morisi, N. Nimai Singh, J. W. F. Valle.


67. Effects of the variation of SUSY breaking scale on Yukawa and gauge coupling unification;

- Advances in High Energy Physics, 2015 (2015)652029.;

- Konsam Sashikanta Singh, N. Nimai Singh.


68. Generation of exactly solvable potentials of the D-Dimensional position-dependent mass Schrodinger equation using the transformation method,

- Theoretical and Mathematical Physics 183(2)715-729(2015),

- H. Rajbongshi and N. Nimai Singh.


69. Parametrization of lepton mixing matrix in terms of deviations from bi-maximal and tri-bimaximal mixing;

- arXiv: 1503.07672; Conference Proceeding: C15-11-02.5 p.204209,

- Chandan Daurah, K. Sashikanta Singh, N. Nimai Singh.


70. Generating non-Zero theta(13) without breaking 2-3 symmetry of neutrino mass matrix,

- arXiv: 1605.00809;

- Subhankar Roy, N. Nimai Singh.


71. Stability of neutrino parameters and self-complementarity relation with varying SUSY breaking scale,

- Phys. Rev. D97(2018)055038;

- K. Sashikanta Singh, Subhakanta Roy, N. Nimai Singh.

72. Deviation from tribimaximal mixing using A(4) flavor model with five extra scalars,

- Nucl. Phys. B983(2022)115932.

- Victoria Puyam, S. Robertson Singh, N. Nimai Singh.


73. Active-Sterile neutrino masses and mixings in A(4) minimal extended seesaw mechanism,

- International Journal of Theoretical Physics, (2022)61:228,

- Mayengbam Kishan Singh, S. Robertson Singh, N. Nimai Singh


74. Effects of variations of SUSY breaking scale on neutrino parameters at low energy scale under radiative corrections,

- Advances in High Energy Physics (2022), Article ID 5780441, 17 pages.

- Kh. Helensana Devi, K. Sashikanta Singh, N. Nimai Singh


75. Deviations from tribimaximal and golden ratio mixings under radiative corrections of neutrino masses and mixings,

- International journal of Modern Physics A37(25)(2022)2250156.

- Ph. Wilina, M. Subhakanta Singh, N. Nimai Singh


76. Non-Zero theta (13) with A(4) x Z(4) flavor symmetry group,

- Letters in High Energy Physics (2022)340,

DOI: 340-LHEP-2305-1-10-20221230.pdf

- Victoria Puyam, N. Nimai Singh.


77. An A(4) model for keV scale sterile neutrino dark matther.

- Letters in High Energy Physics (2023) (in print)

- Mayengbam Kishan Singh, N. Nimai Singh





  1. QUARK MODEL AND BEYOND: The Eternal Quest;

- N.Nimai Singh;

      • Published by Regency Publications, New Delhi (2003);


  1. World famous women scientists (in Manipuri language)

  • N. Nimai Singh, published by Centre for Scientific Culture, Imphal, (2011); ISBN:978-93-5067-245-7

  1. Conceptual Developments in Physics,

  • N. Nimai Singh and K. Kalita

  • ISBN 978-93-93837-09-7

  • Published by Physics Academy of North East (PANE) & Pragya Mediahype Publication, Guwahati, (2022)







Some articles related to popularization of Science

Published in various newspapers/magazines/journals: (written by N. Nimai Singh)

  1. The Standard Model (SM) and Beyond, - published in SOUVENIR of the 8th Manipur Science Congress, Feb. 26-28, 1997, p.4.

  2. Antimatter has no antigravity?- Published in ASSA Newsletter (Gauhati University), May-June, 1996.

  3. The eternal quest: The building block of matter - published in The Freedom English Daily, Imphal, Sept.,23, 1996.

  4. The origin of the Universe: Is God necessary? - Published in People’s Science Network (PSN), Vol.23 (1) (1996)29.

  5. The genesis of geometry: The foundation of rational minds, - published in People’s Science Network (PSN), Vol.3 (1)(1996)40.

  6. Role of atomic scientists in the development of nuclear weapons, - published in People’s Science Network (PSN),Vol.1(2&3)(1994)15.

  7. Information technology: An Introductory overview, - published in People’s Science Network (PSN),Vol.2(1) (1995)9.

  8. Information superhighway, - published in The Freedom English Daily, Imphal,Feb.24, 1996

  9. Solar eclipse: A scientific basis, - published in Freedom English Daily, Imphal, Oct. 7, 1995.

  10. A brief history of antimatter,- published in People’s Science Network (PSN),Vol.3(2)(1996)20.

  11. Centenary year of the discovery of X-rays, - published in The Freedom English Daily, Imphal, Jan. 29, 1995.

  12. Was there life on Mars? – A debate, - published in People’s Science Network (PSN),Vol.3(3)(1997)3.

  13. The structure of vacuum state, - published in The Freedom English Daily, Imphal, May.28, 1995.

  14. Innovations in science education with special emphasis on modern trends in physics education, - published in People’s Science Network (PSN),Vol.1(2 & 3) (1994)9.

  15. Teaching of science subjects to children in mother tongue, - published in The Freedom English Daily, Imphal, Feb. 17, 1996.

  16. Mathematics Olympaid, - published in The Freedom English Daily, Imphal, Jan. 14, 1996.

  17. National Eligibility Test (NET) and JRF, - published in The Freedom English Daily, Imphal, March 5, 1995.

  18. Laser cooling and trapping, - published in The Freedom English Daily, Imphal, Nov. 6, 1997.

  19. Reminiscence of a great scientist: ABDUS SALAM, - published in People’s Science Network (PSN),Vol.1(1)(1994)14.

  20. Reminiscence of a great scientist: S.N.BOSE - published in People’s Science Network (PSN),Vol.1(4)(1994)30.

  21. Reminiscence of a great scientist: SUBRAMANIAN CHANDRASEKHAR, - published in People’s Science Network (PSN),Vol.2(3)(1995)62.

  22. Reminiscence of a great scientist: HOMI J.BHABHA, - published in People’s Science Network (PSN),Vol.2(2)(1995)77.

  23. Reminiscence of a great scientist: ENRICO FERMI, - published in People’s Science Network (PSN),Vol.4(1)(2002)25.

  24. Book review: Dreams of a final theory by Steven Weinberg (1993), - published in People’s Science Network (PSN),Vol.2(4)(1995)43.

  25. Celebrating World Year of Physics, 2005, - published in People’s Science Network (PSN),Vol.4(2)(2005)13.

  26. Superworld, - published in The Sangai Express English Daily, Imphal, Feb. 28, 2006

  27. International Year of Physics, - published in SOUVENIR of National Science Day, Feb.28, 2005, GU and The Sangai Express , Feb. 13, 2005.

  28. Neutrino: The most illusive particle, - published in The Orient Vision, Vol.2(4)(2005)30.

  29. Non-zero neutrino mass and its implications, - published in The Sangai Express, Feb, 2005.

  30. Superstring Theories, published in HORIZON, Vol.3(1)(2005)30.

  31. Nobel Prize and fields Medal, - published in Echemma Manipuri monthly Journal, Nov. 2004, p.25

  32. Smallest building blocks: Quarks, - published in Echemma Manipuri monthly Journal, Feb.. 2004, p.16

  33. Burmuda Triangle, - published in Echemma Manipuri monthly Journal, March., 2004, p.22

  34. Contents of the universe, published in Echemma Manipuri monthly Journal, Jan. 2006, p.29.

  35. Serial on 30 world famous women scientists published in Echemma Manipuri monthly Journal.

  36. Nature of Majorana Neutrinos in Horizon-Ajournal of Physics, Vol.1(2011)145(ISSN:2249-3174)

  37. Origin of the Universe: The Big Bang in PRAJANA, Vol.XIX(2009)111, (ISSN:2250-0871)

  38. A brief history of neutrinos in HORIZON, Vol.1(1999)49

  39. Einstein’s Dream: Quest for Unification of Forces in HORIZON Vol.3 (2005)42.

  40. Quark-Lepton Complementarity in HORIZON Vol.4(2007)67.

  41. Role of mathematics in search of Physical theories, in Padartha Bigyan Patrika, issue: 2010-2011, p.30 (Published by Dibrugarh university)

  42. Manipuri Londa science ki waheising sembagi thoudang published in Neinarol, Issue 7, August, 2011, page 03 (Manipuri language)

  43. Role of mathematics in search of physical theories, webcast in www.e-pao.net on April 11, 2013 (See Home>>Education>>Science 7 Technology)

  44. Discovery of Higgs boson and its implications, webcast in www.e-pao.net on July 10, 2012 (see home>>Education>>Science and technology).

  45. Fundamental Research in basic Sciences by N. Nimai singh, ECHO-Khonthang, Volume XXI 92020) page 30.

  46. Building research Capacity in Physical sciences by N. Nimai Singh, MUTA e-journal- Canchigi mapao, Vol.1, Issue 1, November 2022, page 23.

  47. Problems and prospects of higher educationin North East by N. Nimai Singh, ECHO-Khonthang, Volume XXII, (2022) page 14.



Some foreign countries visited for research works/conferences:

  1. Erice, Sicily, ITALY, 6-14 Aug, 1987, to participate the International School of Subnuclear Physics (SUPERWORLD II) conducted by “Ettore Majorana Centre for Scientific Culture”, Erice, Italy.

  2. ICTP, Trieste, ITALY, 16 July – 28 Sept., 1989, to participate the Summer School in High Energy Physics and Cosmology, conducted by International Centre for Theoretical Physics (ICTP), Italy.

  3. CERN, Geneva, Switzerland, 7-20 Sept., 1989 to participate the collaborate the MonteCarlo Simulation Group of CERN Scientists led by Prof. L. Citarelli.

  4. Ajaccio, France, 23-27 Sept., 1989, to attend and present paper in the International Conference on Hadron Spectroscopy (HADRON’89).

  5. Singapore, 2-8 Aug., 1990, to attend and present paper in the “25th International Conference on High Energy Physics”.

  6. Department of Physics and Astronomy, University of Southampton, U.K. as Commonwealth Fellow during the period 1.10.1999 to 30.09.2000.

  7. Castelvecchio Pascoli , Pisa, Italy, 15-20 April, 2000, to attend and present paper in the European Research Conference “ From Planck Scale to Electroweak Scale”.

  8. The Royal Society, London, U.K., 24-25 May, 2000, to attend on the meeting on the “Quark Structure of Matter”.

  9. Naresuan University, Phitsanulok, Thailand, 17-25 April, 2003, to and and present paper in the Second Tah Poe International School on Cosmology: Modern Cosmology (TPCosmo II).

  10. Abdus Salam International Centre for Theoretical Physics (ICTP), Trieste, Italy during 1.1.2003 – 31.12.2010 as Regular Associate of ICTP and made four visits during June-July 2004, 2007, 2008, 2010.

  11. ICTP, Italy, 28 June -10 July, 2004, to attend Summer School in Cosmology and Astroparticle Physics.

  12. ICTP, Italy, 11 – 22 June, 2007, to attend Summer school in particle Physics, and 22-26 July, 2007 to attend workshop on grand unification and proton decay.

  13. CTP, Italy, 2-5 July, 2008, to attend workshop on C, CP, and T Violation and also 21 JulIy – 1 Aug., 2008, to attend Summer School in Cosmology .

  14. ICTP, Italy, 19-30 July, 2010, to attend Summer School in Cosmology .

  15. Athens, Greece, 14-19 June, 2010, to attend and present paper in the XXIV International Conference on Neutrino Physics (NEUTRINO 2010).