# Fayyazuddin

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{{Short description|Pakistani emeritus professor of theoretical physics (born 1930)}}
{{Use Pakistani English|date=July 2025}}
{{Use dmy dates|date=July 2025}}
{{Infobox scientist
| name              = Fayyazuddin
| image             =
| caption           = 
| birth_date        = {{birth date and age|df=yes|1930|11|10}}
| birth_place       = [Ludhiana](/source/Ludhiana), [Punjab Province](/source/Punjab_Province_(British_India)), British India
| death_date        = 
| death_place       = 
| citizenship       = [Pakistan](/source/Pakistan)
| ethnicity         = 
| fields            = [Theoretical Physics](/source/Theoretical_Physics)
| workplaces        = [National Center for Physics](/source/National_Center_for_Physics) (NCP)<br/> [Quaid-i-Azam University](/source/Quaid-i-Azam_University) (QAU)<br/> [Pakistan Atomic Energy Commission](/source/Pakistan_Atomic_Energy_Commission) (PAEC)<br/> [King Abdul Aziz University](/source/King_Abdul_Aziz_University) (KAAU)<br/>[Ummal Qura University](/source/Umm_al-Qura_University) (UQU)<br/>[King Saud University](/source/King_Saud_University) (KSU)<br/> [European Organization for Nuclear Research](/source/European_Organization_for_Nuclear_Research) (CERN)<br/>[Rutherford Appleton Laboratory](/source/Rutherford_Appleton_Laboratory) (RAL)<br/>[Enrico Fermi Institute for Nuclear Studies](/source/Institute_for_Nuclear_Studies) (EFINC)<br/>[University of Chicago](/source/University_of_Chicago) (UC)
| alma_mater        = [University of Punjab](/source/University_of_Punjab)<br/>[Imperial College, London](/source/Imperial_College%2C_London)
| doctoral_advisor  = [Abdus Salam](/source/Abdus_Salam)
| academic_advisors = [Rafi Muhammad Chaudhry](/source/Rafi_Muhammad_Chaudhry)
| doctoral_students = 
| notable_students  = 
| known_for         = Research in [Gauge Theories](/source/Gauge_theory), [Chiral symmetry](/source/Chiral_symmetry), [Heavy Quark Spin Symmetry](/source/Quark), [Phenomenology](/source/Phenomenology_(particle_physics)) of [Particle Interactions](/source/Electroweak_interactions)
| author_abbrev_bot = 
| author_abbrev_zoo = 
| awards            = [Hilal-i-Imtiaz](/source/Hilal-i-Imtiaz)
| footnotes         = Brother of the [theoretical physicist](/source/theoretical_physicist) [Riazuddin](/source/Riazuddin_(physicist))
and father of the [theoretical physicist](/source/theoretical_physicist) Ansar Fayyazuddin (physicist). 
}}
'''Fayyazuddin'''{{efn|[Punjabi](/source/Punjabi_language)/{{langx|ur|فياض الدين}}}} (born 10 November 1930) is a Pakistani [theoretical physicist](/source/theoretical_physicist) and [emeritus professor](/source/emeritus_professor), specialising in theoretical physics and [mathematical physics](/source/Mathematical_Physics) at the [National Centre for Physics](/source/National_Centre_for_Physics) of [Quaid-e-Azam University](/source/Quaid-e-Azam_University) in [Islamabad](/source/Islamabad).<ref name=NCP/><ref name=ICTP>{{Cite web
  | last = ICTP
  | first =International Centre for Theoretical Physics
  | author-link =International Centre for Theoretical Physics
  | title =News From Associates (scroll down to read this title)
  | work =ICTP News Press
  | publisher =Abdus Salam International Centre for Theoretical Physics
  | date =1999
  | url =https://portal.ictp.it/pio/words/newsletter/backissues/News_94/dateline.html#anchor386602
  | access-date =9 August 2020 }}</ref> He conducts research in the fields of [quantum mechanics](/source/quantum_mechanics), [particle physics](/source/particle_physics), and [meson physics](/source/Meson). Fayyazuddin has published numerous papers alongside [Riazuddin](/source/Riazuddin_(physicist)), including a renowned one on [Quantum Mechanics](/source/Quantum_Mechanics).<ref>[https://trove.nla.gov.au/work/7254371 A modern introduction to particle physics/ Fayyazuddin, Riazuddin] National Library Of Australia (TROVE) website</ref><ref>{{Cite book
  | author1 =Fayyazuddin 
  | author2 = Riazuddin
  | author-link2 =Riazuddin (physicist)
  | title = Quantum mechanics
  | publisher = [World Scientific](/source/World_Scientific)
  | date = 2000
  | location = Singapore and [Islamabad](/source/Islamabad)
  | pages = 1–467
  | url = https://books.google.com/books?id=ot7jq4dTjBEC&q=fayyazuddin 
  | isbn =9971-5-0752-8<!-- Correct hyphenation shown. Hyphenation on the copyright page of the book is incorrect. -->}}
</ref>

==Biography==
Fayyazuddin is the twin brother of [physicist](/source/physicist) [Riazuddin](/source/Riazuddin_(physicist)), and a student of [Abdus Salam](/source/Abdus_Salam).<ref>{{cite news|url=https://www.pakistantoday.com.pk/2016/12/12/salaam-pakistan/ |title=Salaam Pakistan |newspaper=Pakistan Today (newspaper)|author=Abbas Hasan |date=12 December 2016|access-date=8 August 2020}}</ref>

===Education===
He and his twin brother [Riazuddin](/source/Riazuddin_(physicist)) were born on 10 November 1930 into a [Punjabi](/source/Punjabis) family in [Ludhiana](/source/Ludhiana) where they received their intermediate education. Following the [partition of India](/source/partition_of_India), the family migrated to [Lahore](/source/Lahore), Pakistan. The two attended [Punjab University](/source/Punjab_University%2C_Lahore).<ref name=PAS>{{Cite web
 |last         = PAS
 |first        = Pakistan Academy of Sciences
 |author-link   = Pakistan Academy of Sciences
 |title        = Fellows of the Academy (Profile of Fayyazuddin)
 |date         = 20 October 2006
 |url          = http://www.paspk.org/fellow3.htm
 |access-date   =8 August 2020 
 |archive-url  = https://web.archive.org/web/20120828172848/http://www.paspk.org/fellow3.htm
 |archive-date = 28 August 2012
 |url-status     = dead
 |df           = dmy-all
}}</ref> Fayyazuddin completed his [Bachelor of Arts](/source/Bachelor_of_Arts) with honors in mathematics from Punjab University and subsequently earned  [Master of Science](/source/Master_of_Science) in [mathematical physics](/source/mathematical_physics) under the fellowship of [Abdus Salam](/source/Abdus_Salam) in 1953.<ref name=NCP/> His master's degree [dissertation](/source/Masters_Thesis) ''Methods of Mathematical Physics'' was co-written by Riazuddin. In 1953, he became a [Master of Philosophy](/source/Master_of_Philosophy) in [particle physics](/source/particle_physics) with the [academic thesis](/source/Thesis_(academic_document)) ''Energy Loss of Mesons in Crystals'' under the fellowship of [Rafi Muhammad Chaudhry](/source/Rafi_Muhammad_Chaudhry) from the same university.<ref name=NCP/>

After teaching mathematics and physics at Karachi University, Fayyaz traveled to the United Kingdom in 1959. He attended [Imperial College London](/source/Imperial_College_London) where [Abdus Salam](/source/Abdus_Salam) and Riazuddin were serving as his teachers. He was awarded a [PhD](/source/Doctor_of_Philosophy) in theoretical [particle physics](/source/particle_physics) under the fellowship of Abdus Salam in 1962.<ref name=NCP/><ref>{{Cite web
  | title =Fiazudin
  | work =Mathematics Genealogy Project
  | url =https://genealogy.math.ndsu.nodak.edu/id.php?id=78651
  | format =(html)
  }}</ref> Fayyaz's dissertation was written on the "Preliminary Analysis of Photoproduction of K Mesons in the Mandelstam Representation".<ref>{{Cite journal
  | title =Preliminary Analysis of Photoproduction of K Mesons in the Mandelstam Representation
  | journal =[Physical Review](/source/Physical_Review)
  | volume =123  | issue =5  | page =1882
  | doi = 10.1103/PhysRev.123.1882
|bibcode = 1961PhRv..123.1882F | year =1961
  | last1 =Fayyazuddin
  }}</ref> Fayyaz then returned to Pakistan and served at the [Pakistan Atomic Energy Commission](/source/Pakistan_Atomic_Energy_Commission) (PAEC).<ref>{{Cite book
  | last =Rehman
  | first = Shahid-Ur-
  | title =Long Road to Chagai: Early Days of PAEC
  | publisher =Print Wise Publications
  | date =1999
  | pages =5
  }}
</ref>

==Academic career==
Fayyazuddin joined [Pakistan Atomic Energy Commission](/source/Pakistan_Atomic_Energy_Commission) (PAEC) in 1962 where he worked under the guidance of professor [Abdus Salam](/source/Abdus_Salam)<ref name=ICTP/> and continued his research on the [cosmic ray](/source/cosmic_ray) [mu-meson](/source/mu-meson)s. He undertook postdoctoral research at the [Enrico Fermi Institute](/source/Enrico_Fermi_Institute) at the [University of Chicago](/source/University_of_Chicago) from 1966 to 1968.<ref name=NCP/> At the institute, Fayyaz, [Faheem Hussain](/source/Faheem_Hussain), Riazuddin, and Peter Rotteli, formed "The Relativity Group", a team of young research scientists in [special relativity](/source/special_relativity). In 1968, when the Institute of Physics was established at the [University of Islamabad](/source/University_of_Islamabad) (now Quaid-i-Azam University), the scientists eagerly returned to [Pakistan](/source/Pakistan). Fayyazuddin, Hussain, Arif-uz-Zaman, and Sarwar Razmi, joined the Institute of Physics.<ref name=NCP>{{Cite web |url=http://www.ncp.edu.pk/pe-fayyazuddin.php |title=Profile of Fayyazuddin |website=National Centre For Physics (NCP) website |date=12 January 2003 |access-date=9 August 2020 |url-status=dead |df=dmy-all |archive-date=23 February 2019 |archive-url=https://web.archive.org/web/20190223015205/http://www.ncp.edu.pk/pe-fayyazuddin.php }}</ref> The institute become an active center for theoretical particle physics research due to their distinguished contribution, and its presence was recognized internationally.<ref name=NCP/>

In 1970, he went to [Great Britain](/source/Great_Britain), where he attended [Rutherford Appleton Laboratories](/source/Rutherford_Appleton_Laboratories) as an associate research scientist. In 1972, he returned to the Institute of Physics of Quaid-e-Azam University. He joined the Theoretical Physics Group under his brother's guidance and participated in [Fast neutron calculations](/source/Fast_neutron_calculations) – a key calculation to develop the weapons.<ref>{{Citation
  | first = Shahidur | last =Rahman
  | title =The Theoretical Physics Group: A Cue from Manhattan Project
  | place =Islamabad
  | publisher =Printwise publications
  | date = 1999
  | pages =78–80
  }}</ref> In 1973, Fayyaz traveled to [Geneva](/source/Geneva), Switzerland where he became a [visiting scientist](/source/Visiting_scholar) at the [European Organization for Nuclear Research](/source/European_Organization_for_Nuclear_Research) (CERN). In 1977, he returned to Quaid-i-Azam University as a physics professor and subsequently became the [dean](/source/Dean_(education)) of the Faculty of Natural Sciences. In 1980, he went to [Saudi Arabia](/source/Saudi_Arabia) where he became a regular professor of physics at the [King Saud University](/source/King_Saud_University) in [Riyadh](/source/Riyadh) and a regular professor of physics at the [Ummal Qura University](/source/Umm_al-Qura_University) in [Mecca](/source/Mecca) till 1996. After teaching in Saudi Arabia, he returned to Quaid-i-Azam University in 2005.<ref name=ICTP/> In 2007, Fayyazuddin joined Pakistan's [National Center for Physics](/source/National_Center_for_Physics) as a senior scientist. In 2008, he was awarded ''HEC Distinguished Professor'' award by the [Higher Education Commission of Pakistan](/source/Higher_Education_Commission_(Pakistan)).<ref name=ICTP/> In 2000, the [President of Pakistan](/source/President_of_Pakistan), [General Pervez Musharraf](/source/Pervez_Musharraf), conferred on him Pakistan's second-highest civilian award [Hilal-i-Imtiaz](/source/Hilal-i-Imtiaz) for his contributions to the field of research in physics and science.<ref name=ICTP/>

==Awards and honors ==
* [Hilal-i-Imtiaz](/source/Hilal-i-Imtiaz) (Crescent of Excellence) Award by the [Government of Pakistan](/source/Government_of_Pakistan) - (2000)<ref name=PAS/><ref name=ICTP/>
* [HEC Distinguished Professor Award](/source/Higher_Education_Commission_(Pakistan)) - (2007)
* [Khawarzmi International Award in Physics](/source/Khwarizmi_International_Award) - (2003)<ref name=PAS/><ref name=ICTP/>
* [Gold Medal](/source/Gold_Medal) - [Pakistan Academy of Sciences](/source/Pakistan_Academy_of_Sciences) (1979)<ref name=PAS/><ref name=ICTP/>
* D. Dwyer Bhawani Dass Gold Medal, [Government College University](/source/Government_College_University%2C_Lahore) - (1951)<ref name=PAS/><ref name=ICTP/>

==Fellowships and memberships==
*A fellow of the Third World Academy of Sciences for the Developing World (TWAS)<ref name=PAS/><ref name=ICTP/>
*A research member, National Center for Physics, Quaid-i-Azam University, Islamabad (1999)<ref name=PAS/>
*An Associate Member at the [International Center for Theoretical Physics](/source/International_Center_for_Theoretical_Physics), [Trieste](/source/Trieste), [Italy](/source/Italy) (1966–1969, 1972–1980, 1983–1993)<ref name=PAS/>
*An honorary Member of [American Physical Society](/source/American_Physical_Society) (1977)<ref name=PAS/><ref name=ICTP/>
*A Life Member of [Pakistan Physical Society](/source/Pakistan_Physics_Society) (1999)<ref name=PAS/>
*A Member, Syndicate, [Quaid-i-Azam University](/source/Quaid-i-Azam_University) (1975–1977)<ref name=PAS/>

==Works==

===Research papers===
*Development of Science and its Impact on Society
*First LHC School, National Center for Physics (2009)
*The Kawarabayashi-Suzuki-Riazuddin-Fayyazuddin relation and strong mesonic couplings in the cloudy bag model.
*{{cite journal|title=Current algebra, spectral function sum rules and the f − (0) / ƒ+(0) ratio in Kℓ3 decay |journal=Nuclear Physics B |volume=6 |issue=5 |date=1 August 1968 |pages=515–522 |author1=Riazuddin, A.Q. |author2=Sarker, Fayyazuddin |doi=10.1016/0550-3213(68)90297-6 |bibcode = 1968NuPhB...6..515R }}
*{{cite journal|title=The ΔI = 1/2 rule in non-leptonic weak decays |journal=Nuclear Physics B |volume=76 |issue=1 |date=4 July 1974 |pages=125–136 |author=Fayyazuddin, Riazuddin |doi=10.1016/0550-3213(74)90142-4|bibcode = 1974NuPhB..76..125F |url=https://cds.cern.ch/record/873630/files/CM-P00060272.pdf }}
*Radioactive D* decay using vector meson dominance by Riazuddin and Fayyazuddin

===Conference papers===
*Current Algebra and Its Consequences by Fayyazuddin. Papers presented in Center for Advanced Mathematics and Physics (CAMP), [National University of Sciences and Technology](/source/National_University_of_Sciences_and_Technology%2C_Pakistan)

===Books===
*Quantum Mechanics by Fayyazuddin and Riazuddin, World Scientific, Singapore, (1990)<ref name=ICTP/>
*A Modern Introduction to Particle Physics, 2nd edition, World Scientific, Singapore, (2000)<ref name=ICTP/>
*Selected Papers of Abdus Salam, with Commentary by A. Ali, Abdus Salam, Fayyazuddin, Riazuddin

==See also==
*[Riazuddin](/source/Riazuddin_(physicist))
*[Abdus Salam](/source/Abdus_Salam)

==Notes==
{{notelist}}

==References==
{{Reflist|2}}

==External links==
*[https://web.archive.org/web/20100108085412/http://www.ncp.edu.pk/fslp.htm Research Papers of Fayyazuddin]
* {{INSPIRE-HEP author}} 

{{Authority control}}

{{DEFAULTSORT:Fayyazuddin}}
Category:1930 births
Category:Alumni of Imperial College London
Category:People associated with CERN
Category:Fellows of Pakistan Academy of Sciences
Category:Government College University, Lahore alumni
Category:Academic staff of King Saud University
Category:Living people
Category:Muhajir people
Category:Pakistani physicists
Category:Project-706 people
Category:Academic staff of the University of Karachi
Category:Academic staff of Quaid-i-Azam University
Category:Recipients of Hilal-i-Imtiaz
Category:Scientists from Ludhiana
Category:Scientists from Lahore
Category:Pakistani string theorists
Category:Pakistani science writers
Category:Theoretical physicists
Category:University of the Punjab alumni
Category:Nuclear weapons scientists and engineers
Category:People from Punjab Province (British India)
Category:Indian emigrants to Pakistan

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Adapted from the Wikipedia article [Fayyazuddin](https://en.wikipedia.org/wiki/Fayyazuddin) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Fayyazuddin?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.