Hafeez Hoorani | |
---|---|
Born | 1958 (age 64–65) |
Nationality | Pakistani |
Citizenship | Pakistan |
Alma mater | Karachi University Simon Fraser University |
Known for | Loop gravity, Big Bang Theory, Gaseous ionization detectors and Quantum field theory |
Scientific career | |
Fields | High Energy Physics |
Institutions | European Organization for Nuclear Research (CERN) International Centre for Theoretical Physics (ICTP) National Center for Physics(NCP) Quaid-e-Azam University (Qau) |
Doctoral advisor | David H. Boal |
Other academic advisors | K.S. Vishwanatham and M. Plischke |
Hafeez Hoorani or Hafeez-ur-Rehman Hoorani or Hafeez R. Hoorani is a Pakistani particle physicist, with a specialisation in accelerator physics, and a research scientist at the CERN. [1] Hoorani is working at the National Center for Physics, with research focus in elementary particle physics and high energy physics. [2] Until the end of 2013, he served as scientific director of International Centre for Synchrotron-Light for Experimental Science Applications in the Middle East (SESAME) and is now research associate at the National Center for Nuclear Physics, Islamabad. [3]
He has served as a full professor of high energy physics at the National Center for Physics where he heads a group building the muon chamber for the Compact Muon Solenoid detector. He has also supervised the two PhD students during his stay at the National Center for Physics. [4]
Hoorani was born in Karachi and received his early education from there. He attended Karachi University in 1976 and received his BSc with Honors in physics in 1980, followed by his MSc in particle physics from the same institution in 1982. On a KU's awarded scholarship, Hoorani went to Burnaby, Canada where he attended Simon Fraser University. [5] In October 1986, he received his PhD [ citation needed ] in Experimental High Energy Physics under the supervision of Dr. David H. Boal, writing his thesis on Numerical Solution for Hydrodynamic Equations For the Quark-Gluon Plasma. [6]
In 1987, Hoorani joined the International Centre for Theoretical Physics where he continued his research into Quark–gluon plasma and published a brief journal on Production of J/ψ IK Quark-Gloun Plasma in February 1988. [7] Hoorani joined CERN in 1989 where he carried out a large amount of research at CERN's Large Electron–Positron Collider or LEP. In 1999, he returned to Pakistan for a short visit where he successfully convinced the Government of Pakistan to set up a group working on different aspects of the Large Hadron Collider at the National Center for Physics. Due to his efforts, in 2000 Pakistan Atomic Energy Commission (led by nuclear physicist Dr. Ishfaq Ahmad) signed an agreement with CERN. This agreement opened the door for Pakistani physicists to collaborate with CERN's particle physics project. [8] His current research area is the development of gaseous detectors for the hadron collider.
A gluon is a type of elementary particle that mediates the strong interaction between quarks, acting as the exchange particle for the interaction. Gluons are massless vector bosons, thereby having a spin of 1. Through the strong interaction, gluons bind quarks into groups according to quantum chromodynamics (QCD), forming hadrons such as protons and neutrons.
Particle physics or high energy physics is the study of fundamental particles and forces that constitute matter and radiation. The fundamental particles in the universe are classified in the Standard Model as fermions and bosons. There are three generations of fermions, although ordinary matter is made only from the first fermion generation. The first generation consists of up and down quarks which form protons and neutrons, and electrons and electron neutrinos. The three fundamental interactions known to be mediated by bosons are electromagnetism, the weak interaction, and the strong interaction.
The European Organization for Nuclear Research, known as CERN, is an intergovernmental organization that operates the largest particle physics laboratory in the world. Established in 1954, it is based in a suburb of Geneva, on the France–Switzerland border. It comprises 23 member states. Israel, admitted in 2013, is the only non-European full member. CERN is an official United Nations General Assembly observer.
The Large Hadron Collider (LHC) is the world's largest and highest-energy particle collider. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories across more than 100 countries. It lies in a tunnel 27 kilometres (17 mi) in circumference and as deep as 175 metres (574 ft) beneath the France–Switzerland border near Geneva.
In the particle physics theory of supersymmetry, a gluino is the hypothetical supersymmetric partner of a gluon.
High-energy nuclear physics studies the behavior of nuclear matter in energy regimes typical of high-energy physics. The primary focus of this field is the study of heavy-ion collisions, as compared to lighter atoms in other particle accelerators. At sufficient collision energies, these types of collisions are theorized to produce the quark–gluon plasma. In peripheral nuclear collisions at high energies one expects to obtain information on the electromagnetic production of leptons and mesons that are not accessible in electron–positron colliders due to their much smaller luminosities.
Quark matter or QCD matter refers to any of a number of hypothetical phases of matter whose degrees of freedom include quarks and gluons, of which the prominent example is quark-gluon plasma. Several series of conferences in 2019, 2020, and 2021 were devoted to this topic.
Leptoquarks are hypothetical particles that would interact with quarks and leptons. Leptoquarks are color-triplet bosons that carry both lepton and baryon numbers. Their other quantum numbers, like spin, (fractional) electric charge and weak isospin vary among theories. Leptoquarks are encountered in various extensions of the Standard Model, such as technicolor theories, theories of quark–lepton unification (e.g., Pati–Salam model), or GUTs based on SU(5), SO(10), E6, etc. Leptoquarks are currently searched for in experiments ATLAS and CMS at the Large Hadron Collider in CERN.
The High Luminosity Large Hadron Collider is an upgrade to the Large Hadron Collider, operated by the European Organization for Nuclear Research (CERN), located at the French-Swiss border near Geneva. From 2011 to 2020, the project was led by Lucio Rossi. In 2020, the lead role was taken up by Oliver Brüning.
In high-energy physics, jet quenching is a phenomenon that can occur in the collision of ultra-high-energy particles. In general, the collision of high-energy particles can produce jets of elementary particles that emerge from these collisions. Collisions of ultra-relativistic heavy-ion particle beams create a hot and dense medium comparable to the conditions in the early universe, and then these jets interact strongly with the medium, leading to a marked reduction of their energy. This energy reduction is called "jet quenching".
Quark–gluon plasma is an interacting localized assembly of quarks and gluons at thermal and chemical (abundance) equilibrium. The word plasma signals that free color charges are allowed. In a 1987 summary, Léon van Hove pointed out the equivalence of the three terms: quark gluon plasma, quark matter and a new state of matter. Since the temperature is above the Hagedorn temperature—and thus above the scale of light u,d-quark mass—the pressure exhibits the relativistic Stefan-Boltzmann format governed by temperature to the fourth power and many practically massless quark and gluon constituents. It can be said that QGP emerges to be the new phase of strongly interacting matter which manifests its physical properties in terms of nearly free dynamics of practically massless gluons and quarks. Both quarks and gluons must be present in conditions near chemical (yield) equilibrium with their colour charge open for a new state of matter to be referred to as QGP.
Johann Rafelski is a German-American theoretical physicist. He is a professor of physics at the University of Arizona in Tucson, guest scientist at CERN (Geneva), and has been LMU-Excellent Guest Professor at the Ludwig Maximilian University of Munich in Munich, Germany.
The National Centre for Physics, is a federally-funded research institute and national laboratory site managed by the Quaid-i-Azam University for the Ministry of Energy (MoE) of the Government of Pakistan.
In high-energy nuclear physics, strangeness production in relativistic heavy-ion collisions is a signature and diagnostic tool of quark–gluon plasma (QGP) formation and properties. Unlike up and down quarks, from which everyday matter is made, heavier quark flavors such as strange and charm typically approach chemical equilibrium in a dynamic evolution process. QGP is an interacting localized assembly of quarks and gluons at thermal (kinetic) and not necessarily chemical (abundance) equilibrium. The word plasma signals that color charged particles are able to move in the volume occupied by the plasma. The abundance of strange quarks is formed in pair-production processes in collisions between constituents of the plasma, creating the chemical abundance equilibrium. The dominant mechanism of production involves gluons only present when matter has become a quark–gluon plasma. When quark–gluon plasma disassembles into hadrons in a breakup process, the high availability of strange antiquarks helps to produce antimatter containing multiple strange quarks, which is otherwise rarely made. Similar considerations are at present made for the heavier charm flavor, which is made at the beginning of the collision process in the first interactions and is only abundant in the high-energy environments of CERN's Large Hadron Collider.
Sir Tejinder Singh Virdee,, is a Kenyan-born British experimental particle physicist and Professor of Physics at Imperial College London. He is best known for originating the concept of the Compact Muon Solenoid (CMS) with a few other colleagues and has been referred to as one of the 'founding fathers' of the project. CMS is a world-wide collaboration which started in 1991 and now has over 3500 participants from 45 countries.
The Future Circular Collider (FCC) is a proposed particle accelerator with an energy significantly above that of previous circular colliders, such as the Super Proton Synchrotron, the Tevatron, and the Large Hadron Collider (LHC). The FCC project is considering three scenarios for collision types: FCC-hh, for hadron-hadron collisions, including proton-proton and heavy ion collisions, FCC-ee, for electron-positron collisions, and FCC-eh, for electron-hadron collisions.
Claude Pruneau is a Canadian-American experimental high-energy nuclear physicist. He is a professor of physics at Wayne State University and the author of several books. He is best known for his work on particle correlation measurements in heavy ion collisions at the Relativistic Heavy Ion Collider and the Large Hadron Collider.
The Scattering and Neutrino Detector (SND) at the Large Hadron Collider (LHC), CERN, is an experiment built for the detection of the collider neutrinos. The primary goal of SND is to measure the p+p --> +X process and search for the feebly interacting particles. It will be operational from 2022, during the LHC-Run 3 (2022-2024). SND will be installed in an empty tunnel- TI18 that links the LHC and Super Proton Synchrotron, 480m away from the ATLAS experiment interaction point in the fast forward region and along the beam collision axis.
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