Shehu AbdusSalam
A5043204822- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Particle Accelerators and Free-Electron Lasers
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- Hydrocarbon exploration and reservoir analysis
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
- International Science and Diplomacy
- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Petroleum Processing and Analysis
- Astrophysics and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Lubricants and Their Additives
- Earthquake Detection and Analysis
- advanced mathematical theories
- Advances in Oncology and Radiotherapy
- Biodiesel Production and Applications
- Evolutionary Algorithms and Applications
Shahid Beheshti University
2017-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2016-2017
Sapienza University of Rome
2016
The Abdus Salam International Centre for Theoretical Physics (ICTP)
2010-2015
International Centre for Theoretical Sciences
2014
University of Cambridge
2007-2010
In response to the 2013 Update of European Strategy for Particle Physics, Future Circular Collider (FCC) study was launched, as an international collaboration hosted by CERN. This covers a highest-luminosity high-energy lepton collider (FCC-ee) and energy-frontier hadron (FCC-hh), which could, successively, be installed in same 100 km tunnel. The scientific capabilities integrated FCC programme would serve worldwide community throughout 21st century. also investigates LHC energy upgrade,...
We review the physics opportunities of Future Circular Collider, covering its e+e-, pp, ep and heavy ion programmes. describe measurement capabilities each FCC component, addressing study electroweak, Higgs strong interactions, top quark flavour, as well phenomena beyond Standard Model. highlight synergy complementarity different colliders, which will contribute to a uniquely coherent ambitious research programme, providing an unmatchable combination precision sensitivity new physics.
In response to the 2013 Update of European Strategy for Particle Physics (EPPSU), Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC covered an energy-frontier hadron collider (FCC-hh), highest-luminosity high-energy lepton (FCC-ee), corresponding 100 km tunnel infrastructure, well physics opportunities these two colliders, and LHC, based on FCC-hh technology. This document constitutes third volume Conceptual Design Report,...
In response to the 2013 Update of European Strategy for Particle Physics (EPPSU), Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC covered an energy-frontier hadron collider (FCC-hh), highest-luminosity high-energy lepton (FCC-ee), corresponding 100 km tunnel infrastructure, well physics opportunities these two colliders, and LHC, based on FCC-hh technology. This document constitutes third volume Conceptual Design Report,...
The nature of dark matter and properties neutrinos are among the most pressing issues in contemporary particle physics. dual-phase xenon time-projection chamber is leading technology to cover available parameter space for Weakly Interacting Massive Particles (WIMPs), while featuring extensive sensitivity many alternative candidates. These detectors can also study through neutrinoless double-beta decay a variety astrophysical sources. A next-generation xenon-based detector will therefore be...
We perform a global Bayesian fit of the phenomenological minimal supersymmetric standard model (pMSSM) to current indirect collider and dark matter data. The pMSSM contains most relevant 25 weak-scale MSSM parameters, which are simultaneously using `nested sampling' Monte Carlo techniques in more than 15 years CPU time. calculate evidence for constrain its parameters observables context two widely different, but reasonable, priors determine inferences robust. make about sparticle masses,...
We define benchmark models for SUSY searches at the LHC, including CMSSM, NUHM, mGMSB, mAMSB, MM-AMSB and p19MSSM, as well with R-parity violation NMSSM. Within parameter spaces of these models, we propose subspaces, planes, lines points along them. The planes may be useful presenting results experimental in different scenarios, while specific serve more detailed detector performance tests comparisons. also describe algorithms defining suitable proposed spaces, a few motivated by recent fits...
The extension of the standard model's minimal Higgs sector with an inert SU(2)L scalar doublet can provide light dark matter candidate and simultaneously induce a strong phase transition for explaining Baryogenesis. There is however no symmetry reasons to prevent using scalars higher representations. By making random scans over models' parameters, we show that in electroweak physics constraints, first order possibility having sub-TeV cold representations are rather disfavored compared...
We study the problem of selecting between different mechanisms supersymmetry breaking in Minimal Supersymmetric Standard Model using current data. evaluate Bayesian evidence four scenarios: mSUGRA, mGMSB, mAMSB and moduli mediation. The results show a strong dependence on dark matter assumption. Using inferred cosmological relic density as an upper bound, minimal anomaly mediation is at least moderately favoured over CMSSM. Our fits also indicate that for positive sign mu parameter moderate...
We propose symbolic regression as a powerful tool for the numerical studies of proposed models physics beyond Standard Model. In this paper we demonstrate efficacy method on benchmark model, namely constrained minimal supersymmetric Model, which has four-dimensional parameter space. provide set analytical expressions that reproduce three low-energy observables interest in terms parameters theory: Higgs mass, contribution to anomalous magnetic moment muon, and cold dark matter relic density....
Abstract Given the huge size of generic four-dimens-ional scalar potentials arising from type II supergravities based on toroidal orientifolds, it is even hard to analytically solve extremization conditions, and therefore previous studies have been mainly focused taking some numerical approaches. In this work, using so-called axionic flux polynomials we demonstrate that potential conditions can be simplified a great extent, leading possibility performing an analytic exploration landscape....
In the context of type IIB superstring compactifications on K3-fibred (weak) Swiss-cheese Calabi Yau (CY) orientifolds, we consider realisation de Sitter vacua obtained through introduction an anti-D3-brane at tip a highly warped throat Klebanov-Strassler type. Aiming to have concrete global realisation, perform systematic search for CY threefolds with $2 < h^{1,1} 5$ arising from Kreuzer-Skarke database, which satisfy minimal requirements being and suitable moduli stabilisation within LARGE...
The ATLAS collaboration published supersymmetry limits based on up to about 4.7 \ifb data collected over the year 2011 from LHC runs at 7 TeV. These were mainly interpreted within restricted, particular or simplified models for breaking schemes scenarios. pMSSM is an alternative and more generic framework which captures broader phenomenological features. Searching conclusions interpretation, we update a Bayesian global fit of pre-LHC using LHC-7 limits. posterior distributions show most date...
Achieving full moduli stabilisation in type IIB string compactifications for generic Calabi-Yau threefolds with hundreds of Kähler is notoriously hard. This due not just to the very fast increase computational complexity number moduli, but also fact that scalar potential depends general on supergravity variables only implicitly. In fact, chiral coordinates are 4- cycle volume an explicit function 2-cycle and inverting between these two impossible. this paper we pro- pose a method fix all...
Why is natural supersymmetry neither detected nor ruled out to date? To answer this question we use the Bayesian approach where emphasis in finding prior-independent features within broader and minimally biased frames taken as guiding principle. The 20-parameter minimal supersymmetric standard model (MSSM) global fits subjective naturalness indicate existence of a upper bound on pseudoscalar Higgs boson mass ${m}_{A}$ function $\mathrm{tan}\ensuremath{\beta}$, ratio vacuum expectation values...
The signal strength of the recently discovered Higgs boson-like particle in diphoton channel seemingly constrains physics beyond standard model to a severe degree.However, reported is prone possible underestimation uncertainties.We propose discriminant that relatively free many theoretical uncertainties, and use this gauge impact on phenomenological MSSM.A Bayesian global fit all pre-LHC data results posterior distributions for masses are neither very restrictive, nor sufficiently...
Up until now a complete scan in all phenomenologically relevant directions of the MSSM at TeV scale for performing global fit has not been done. Given imminent start operation LHC, this is major gap on our quest to discovering and understanding physical implications low energy supersymmetry. The main reason large number parameters involved that makes it computationally extremely expensive using traditional methods. In talk I demonstrate with advanced sampling techniques problem solvable....
The 100+ free parameters of the minimal supersymmetric standard model (MSSM) make it computationally difficult to compare systematically with data, motivating study specific parameter reductions such as cMSSM and pMSSM. Here we instead space implied by using flavour violation (MFV) organise R-parity conserving MSSM, a view towards building in constraints on flavour-violating physics. Within this framework is reduced expanding soft supersymmetry-breaking terms powers Cabibbo angle, leading...