A5100647843- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Astrophysics and Cosmic Phenomena
- Economic and Financial Impacts of Cancer
- Advances in Oncology and Radiotherapy
- Statistical Mechanics and Entropy
- Industrial and Mining Safety
- Neutrino Physics Research
- Health Systems, Economic Evaluations, Quality of Life
- Earthquake Detection and Analysis
- Particle Detector Development and Performance
- Radioactivity and Radon Measurements
COMSATS University Islamabad
2016-2024
A. Alikhanyan National Laboratory
2020
Jagiellonian University
2013-2014
Institute of Physics
2013-2014
Measurements of anisotropic flow coefficients (v_{n}) and their cross-correlations using two- multiparticle cumulant methods are reported in collisions pp at sqrt[s]=13 TeV, p-Pb a center-of-mass energy per nucleon pair sqrt[s_{NN}]=5.02 Xe-Xe sqrt[s_{NN}]=5.44 Pb-Pb TeV recorded with the ALICE detector. The multiplicity dependence v_{n} is studied very wide range from 20 to 3000 particles produced midrapidity region |η|<0.8 for transverse momentum 0.2<p_{T}<3.0 GeV/c. An ordering...
We present a study of the inclusive charged-particle transverse momentum ($p_{\rm T}$) spectra as function multiplicity density at mid-pseudorapidity, ${\rm d}N_{\rm ch}/{\rm d}\eta$, in pp collisions $\sqrt{s}$ = 5.02 and 13 TeV covering kinematic range $|\eta|<0.8$ $0.15<p_{\rm{T}}<20$ GeV/$c$. The results are presented for events with least one charged particle $|\eta|<1$ (INEL$ >0$). $p_{\rm T}$ reported two estimators different pseudorapidity regions. normalized to that INEL $>0$ show...
The first measurement at the LHC of charge-dependent directed flow (${v}_{1}$) relative to spectator plane is presented for Pb-Pb collisions $\sqrt{{s}_{\mathrm{NN}}}=5.02\text{ }\text{ }\mathrm{TeV}$. Results are reported charged hadrons and ${\mathrm{D}}^{0}$ mesons transverse momentum intervals ${p}_{\mathrm{T}}>0.2\text{ }\mathrm{GeV}/c$ $3<{p}_{\mathrm{T}}<6\text{ in 5%--40% 10%--40% centrality classes, respectively. difference between positively negatively hadron ${v}_{1}$ has a...
The measurements of the production prompt $${{\mathrm{D}}^0}$$ , $${{\mathrm{D}}^+}$$ $${{\mathrm{D}}^{*+}}$$ and $${{\mathrm{D}}^+_{\mathrm{s}}}$$ mesons in proton–proton (pp) collisions at $$\sqrt{s}=5.02~\mathrm {TeV}$$ with ALICE detector Large Hadron Collider (LHC) are reported. D were reconstructed mid-rapidity ( $$|y|<0.5$$ ) via their hadronic decay channels $$\mathrm{D}^0 \rightarrow {\mathrm{K}}^-\pi ^+$$ $$\mathrm{D}^+\rightarrow ^+\pi $${\mathrm{D}}^{*+} {\mathrm{D}}^0 \pi ^+...
The study of the strength and behaviour antikaon-nucleon ($\mathrm{\overline{K}N}$) interaction constitutes one key focuses strangeness sector in low-energy Quantum Chromodynamics (QCD). In this letter a unique high-precision measurement strong between kaons protons, close above kinematic threshold, is presented. femtoscopic measurements correlation function at low pair-frame relative momentum (K$^+$ p $\oplus$ K$^-$ $\overline{\mathrm{p}}$) (K$^-$ K$^+$ pairs measured pp collisions...
The inclusive J/$ψ$ meson production in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon collision of $\sqrt{s_{\rm NN}}$ = 5.02 TeV midrapidity ($|y|$ < 0.9) is reported by the ALICE Collaboration. measurements are performed dielectron decay channel, as function event centrality and transverse momentum $p_{\rm T}$, down to T}$ 0 GeV/$c$. mean $\langle p_{\rm T} \rangle$ $r_{\rm AA}$ ratio, defined p^{\rm 2}_{\rm \rangle_{\rm PbPb}/\langle pp}$, evaluated. Both observables...
A bstract The measurement of the production prompt D 0 , + *+ and $$ {\mathrm{D}}_{\mathrm{S}}^{+} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>D</mml:mi> <mml:mi>S</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math> mesons in proton–lead (p–Pb) collisions at centre-of-mass energy per nucleon pair \sqrt{s_{\mathrm{NN}}} <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> = 5 . 02 TeV, with an integrated luminosity 292 ±...
A bstract The transverse momentum ( p T ) differential cross section of the charm-strange baryon $$ {\Xi}_{\mathrm{c}}^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> is measured at midrapidity (| y | < 0.5) via its semileptonic decay into e + Ξ − ν in pp collisions \sqrt{s} <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> = 5 . 02 TeV with ALICE detector LHC. ratio -differential...
The production of ϒ mesons in Pb–Pb collisions at a centre-of-mass energy per nucleon pair sNN=5.02 TeV is measured with the muon spectrometer ALICE detector LHC. yields as well nuclear modification factors are determined forward rapidity region 2.5<y<4.0, function rapidity, transverse momentum and collision centrality. results show that ϒ(1S) meson suppressed by factor about three respect to proton–proton collisions. For first time, significant signal for ϒ(2S) observed indicating...
Systematic studies of charge-dependent two- and three-particle correlations in Pb-Pb collisions at $\sqrt{\it{s}_\mathrm{{NN}}} = $ 2.76 5.02 TeV used to probe the Chiral Magnetic Effect (CME) are presented. These measurements performed for charged particles pseudorapidity ($\eta$) transverse momentum ($p_{\rm{T}}$) ranges $\left|\eta \right| < 0.8$ $0.2 p_{\mathrm{T}} 5$ GeV/$c$. A significant signal that becomes more pronounced peripheral is reported CME-sensitive correlators $\gamma_{1,1}...
A bstract The production of non-prompt D 0 mesons from beauty-hadron decays was measured at midrapidity (| y | < . 5) in Pb-Pb collisions a nucleon-nucleon center-of-mass energy $$ \sqrt{{\textrm{s}}_{\textrm{NN}}} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> </mml:math> = 5 02 TeV with the ALICE experiment LHC. Their nuclear modification factor ( R AA ), for first time down to p T 1 GeV /c...
A bstract The production of J /ψ is measured at midrapidity ( |y| < 0 . 9) in proton-proton collisions $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt></mml:math> = 5 02 and 13 TeV, through the dielectron decay channel, using ALICE detector Large Hadron Collider. data sets used for analyses correspond to integrated luminosities \mathcal{L} xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>L</mml:mi></mml:math> int 19.4 ±...
Angular correlations between heavy-flavor decay electrons and charged particles at midrapidity ($|\ensuremath{\eta}|<0.8$) are measured in $p$-Pb collisions $\sqrt{{s}_{NN}}=5.02\text{ }\text{ }\mathrm{TeV}$. The analysis is carried out for the 0%--20% (high) 60%--100% (low) multiplicity ranges. jet contribution correlation distribution from high-multiplicity events removed by subtracting low-multiplicity events. An azimuthal modulation remains after removing contribution, similar to...
The elliptic flow of electrons from beauty hadron decays at midrapidity ($|y|<0.8$) is measured in Pb-Pb collisions $\sqrt{{s}_{NN}}=5.02\text{ }\text{ }\mathrm{TeV}$ with the ALICE detector LHC. azimuthal distribution particles produced can be parametrized a Fourier expansion, which second harmonic coefficient represents flow, ${v}_{2}$. ${v}_{2}$ for first time transverse momentum (${p}_{T}$) range $1.3--6\text{ }\mathrm{GeV}/c$ centrality class 30%--50%. measurement beauty-hadron exploits...
Abstract The yield of transverse momentum ( p T ) spectra integrated hadrons and their ratios produced in pp collisions at 7 TeV are reported using DPMJET-III, EPOS1.99, EPOS-LHC, HIJING1.383, QGSJETII-04, Sibyll2.3c models. models’ predictions compared with the ALICE measurements obtained mid rapidity range from 0.3–6 GeV/ c , 0.2–6 0.1–3 for protons, kaons pions respectively. Compared to experimental data, EPOS1.99 EPOS-LHC models predict pion very well while reproducing yields kaon proton...
In this research paper, the comprehensive results on double differential yield of [Formula: see text] and mesons, protons antiprotons as a function laboratory momentum are reported. These hadrons produced in proton–carbon interaction at 60 GeV/c. EPOS 1.99, EPOS-LHC QGSJETII-04 models used to perform simulations. Comparing predictions these show that model predicts higher yields all most cases peak distribution. interval, 1.99 produce similar results. hadrons, three good agreement. For...
The production yield of prompt D mesons and their elliptic flow coefficient $v_2$ were measured with the Event-Shape Engineering (ESE) technique applied to mid-central (10-30% 30-50% centrality classes) Pb-Pb collisions at centre-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}} =5.02$ TeV, ALICE detector LHC. ESE allows classification events, belonging same centrality, according azimuthal anisotropy soft particle in collision. reported measurements give opportunity investigate dynamics...
The first measurements of the scattering parameters $\mathrm{\ensuremath{\Lambda}}K$ pairs in all three charge combinations ($\mathrm{\ensuremath{\Lambda}}{K}^{+}, \mathrm{\ensuremath{\Lambda}}{K}^{\ensuremath{-}}$, and $\mathrm{\ensuremath{\Lambda}}{K}_{S}^{0}$) are presented. results achieved through a femtoscopic analysis correlations Pb-Pb collisions at $\sqrt{{s}_{NN}}=2.76$ TeV recorded by ALICE Large Hadron Collider. result from strong final-state interactions fit with parametrization...
Projects proposed for the long baseline neutrino and cosmic rays’ experiments require high precision hadron production measurements, using proton beam on different targets, to achieve their physics goals. The predictions of depend modeling protons interacting within targets. Thus, hadronic models are being used this purpose with precisions, which projectile energy material target used. comparison predictions, in proton–carbon interactions at 31 GeV/c, is reported paper. Double differential...
Hadron production measurements are important for the long baseline neutrino oscillation experiment as well study of extensive air shower produced by cosmic rays. For precise neutrinos flux prediction, and Λ need to be considered. To this aim, in polar angle intervals 0 300 mrad 420 mrad, respectively, is carried out. models, EPOS 1.99, EPOS-LHC QGSJETII-04, used simulate particles with proton-carbon interactions at 31 GeV/c. The models predictions compared NA61/SHINE based on analysis data...
The pseudorapidity [Formula: see text] dependence of charged-particles ratios in three transverse momentum regions, obtained by hadron production models, proton–proton collisions at 7 TeV are compared with the measurements LHCb detector. Compared to experimental data, independent and very well predicted all models (DPMJETIII, EPOS1.99, EPOS-LHC, HIJING1.383, QGSJETII-04 Sibyll2.3c). All predict ratio low for text], but underestimate afterward while reproducing data medium high well. is...
In this research paper, comprehensive results on the double differential yield of [Formula: see text] and mesons, protons antiprotons as a function laboratory momentum in several polar angle ranges from 0–420 mrad for pions, 0–360 kaons, proton antiproton are reported. EPOS 1.99, EPOS-LHC QGSJETII-04 models used to perform simulations. The predictions these at 90 GeV/c plotted comparison, which shows that model gives overall higher mesons interval 0–40 but is only up 20 mrad. For after 40...
Production cross sections of muons from semi-leptonic decays charm and beauty hadrons were measured at forward rapidity ($2.5<y<4$) in proton--proton (pp) collisions a centre-of-mass energy $\sqrt{s}=5.02$ TeV with the ALICE detector CERN LHC. The results obtained an extended transverse momentum interval, $2 < p_{\rm T} 20$ GeV/$c$, improved precision compared to previous measurements performed same interval energies $\sqrt{s}= 2.76$ 7 TeV. $p_{\rm T}$- $y$-differential production as well...