A5078200142- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Neutrino Physics Research
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Pulsars and Gravitational Waves Research
- High-pressure geophysics and materials
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear reactor physics and engineering
- Medical Imaging Techniques and Applications
- Statistical Mechanics and Entropy
- Crystallography and molecular interactions
- International Science and Diplomacy
- Quantum, superfluid, helium dynamics
- Statistical Methods and Bayesian Inference
Dr. B. R. Ambedkar National Institute of Technology Jalandhar
2020-2025
Saha Institute of Nuclear Physics
2014-2024
Panjab University
2013-2024
Institute of High Energy Physics
2010-2024
University of Antwerp
2024
A. Alikhanyan National Laboratory
2024
Shoolini University
2022
Centro Brasileiro de Pesquisas Físicas
2013-2016
Northeastern University
2012-2013
University of Washington
2010-2012
We report evidence of a narrow structure, $X(5568)$, in the decay sequence $X(5568) \rightarrow B_s^0 π^{\pm}$, $B_s^0 J/ψϕ$, $J/ψ\rightarrow μ^+ μ^-$, $ϕ\rightarrow K^+K^-$. This is for first instance hadronic state with valence quarks four different flavors. The mass and natural width this are measured to be $m = 5567.8 \pm 2.9 {\rm \thinspace (stat)} ^{+0.9}_{-1.9} (syst)}$ MeV/$c^2$ $Γ= 21.9 6.4 ^{+5.0}_{-2.5} (syst)} $ MeV/$c^2$. If B_s^* π^{\pm} γπ^{\pm}$ an unseen $γ$, $m(X(5568))$...
We investigate the decay ${B}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}{K}^{+}$ in a search for $X(4140)$ state, narrow threshold resonance $J/\ensuremath{\psi}\ensuremath{\phi}$ system. The data sample corresponds to an integrated luminosity of $10.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\mathrm{TeV}$ collected by D0 experiment Fermilab Tevatron collider. observe mass peak with statistical significance 3.1...
We present a measurement of the forward–backward asymmetry in top quark–antiquark production using full Tevatron Run II data set collected by D0 experiment at Fermilab. The is performed lepton+jets final states new kinematic fitting algorithm for events with four or more jets and partial reconstruction only three jets. Corrected detector acceptance resolution effects, evaluated to be AFB=(10.6±3.0)%. Results are consistent standard model predictions which range from 5.0% 8.8%. also...
We present the observation of doubly-produced $J/\psi$ mesons with D0 detector at Fermilab in $p\bar{p}$ collisions $\sqrt{s}=1.96$ TeV. The production cross section for both singly and is measured using a sample an integrated luminosity 8.1fb$^{-1}$. For first time, double separated into contributions due to single parton scatterings. Using these measurements, we determine effective $\sigma_{eff}$, parameter characterizing spatial area parton-parton interactions related density inside nucleon.
A measurement of direct photon production in ${}^{208}\mathrm{Pb}{+}^{208}\mathrm{Pb}$ collisions at $158A$ GeV has been carried out the CERN WA98 experiment. The invariant yield photons central is extracted as a function transverse momentum interval $0.5<{p}_{T}<4\mathrm{GeV}/c$. significant signal, compared to statistical and systematical errors, seen ${p}_{T}>1.5\mathrm{GeV}/c$. result constitutes first observation ultrarelativistic heavy-ion collisions. It could be for diagnosis...
We present a measurement of the electron charge asymmetry in $p\overline{p}\ensuremath{\rightarrow}W+X\ensuremath{\rightarrow}e\ensuremath{\nu}+X$ events at center-of-mass energy 1.96 TeV, using data corresponding to $9.7\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity collected with D0 detector Fermilab Tevatron Collider. The is measured as function pseudorapidity and presented five kinematic bins based on transverse missing event. compared next-to-leading-order...
We report evidence for the simultaneous production of $J/\psi$ and $\Upsilon$ mesons in 8.1 fb$^{-1}$ data collected at $\sqrt{s}=$1.96 TeV by D0 experiment Fermilab $p \bar p$ Tevatron Collider. Events with these characteristics are expected to be produced predominantly gluon-gluon interactions. In this analysis, we extract effective cross section characterizing initial parton spatial distribution, $\sigma_{eff}=2.2\pm 0.7\mbox{(stat)} \pm 0.9 \mbox{(syst)} ~\mbox{mb}$.
We calculate the valence quark generalized parton distributions (GPDs) of lightest pseudoscalar meson, pion, in an isospin asymmetric nuclear matter at zero temperature by employing a light-cone model. The medium modifications unpolarized GPDs have been incorporated taking inputs from chiral SU($3$) mean field electromagnetic form factors (EMFFs) and charge radii calculated for both vacuum in-medium cases. These results are found to be agreement with available experimental data other model...
The role of asymmetric nuclear medium on the properties kaon is investigated at zero and finite temperature employing a hybrid approach integrating light cone quark model chiral SU(3) mean field model. in-medium masses are calculated within used as inputs to study modifications in properties. In particular, we have analyzed impact baryonic density, isospin asymmetry, weak decay constant, distribution amplitudes, parton functions (PDFs) valence quarks kaon. effects asymmetry doublet <a:math...
We present a measurement of the semileptonic mixing asymmetry for ${B}^{0}$ mesons, ${a}_{\mathrm{sl}}^{d}$, using two independent decay channels: ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{D}^{\ensuremath{-}}X$, with ${D}^{\ensuremath{-}}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ensuremath{-}}$; and ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{D}^{*\ensuremath{-}}X$,...
We measure the inclusive single muon charge asymmetry and like-sign dimuon in $p \bar{p}$ collisions using full data set of 10.4 fb$^{-1}$ collected with D0 detector at Fermilab Tevatron. The standard model predictions asymmetries induced by CP violation are small magnitude compared to current experimental precision, so non-zero measurements could indicate new sources violation. differ from these a significance 3.6 deviations. These results interpreted framework $B$ meson mixing within CKM...
We measure the mass of top quark in lepton+jets final states using full sample pp collision data collected by D0 experiment Run II Fermilab Tevatron Collider at sqrt[s] = 1.96 TeV, corresponding to 9.7 fb(-1) integrated luminosity. use a matrix element technique that calculates probabilities for each event result from tt production or background. The overall jet energy scale is constrained situ W boson. m(t) 174.98 ± 0.76 GeV. This constitutes most precise single measurement top-quark mass.
We determine the fraction of events with double parton (DP) scattering in a single $p\overline{p}$ collision at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ samples $\ensuremath{\gamma}+3$ jet and $\ensuremath{\gamma}+b/c\text{ }\text{jet}+2$ collected D0 detector corresponding to an integrated luminosity about $8.7\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The DP fractions effective cross sections (${\ensuremath{\sigma}}_{\text{eff}}$) are measured for both event using same kinematic...
Abstract In the present work, we investigate impact of finite volume on in-medium properties kaons (K+, K0), antikaons (K−, $\bar{K^0}$), and φ mesons in isospin asymmetric strange hadronic medium at density temperature. We use chiral SU(3) mean-field model, which accounts for interactions between baryons through exchange scalar (σ, ζ, δ) vector (ω, ρ, φ) fields. To effects volume, apply multiple reflection expansion (MRE) technique calculations states. At high baryon density, an increase...
We present a measurement of the average value new observable at hadron colliders that is sensitive to QCD dynamics and strong coupling constant, while being only weakly parton distribution functions. The measures angular correlations jets defined as number neighboring above given transverse momentum threshold which accompany jet within distance Delta-R in plane rapidity azimuthal angle. ensemble over all an inclusive sample measured results are presented function jets, different regions for...
We present a comprehensive analysis of inclusive W(→eν)+n-jet (n≥1, 2, 3, 4) production in proton-antiproton collisions at center-of-mass energy 1.96 TeV the Tevatron collider using 3.7 fb−1 data set collected by D0 detector. Differential cross sections are presented as function jet rapidities (y), lepton transverse momentum (pT) and pseudorapidity (η), scalar sum energies W boson all jets (HT), leading dijet pT invariant mass, rapidity separations for variety pairings pT-ordered...
We present measurements of lepton (l) angular distributions in ttbar -> W+ b W- l+ nu l- nubar bbar decays produced ppbar collisions at a center-of-mass energy sqrt(s)=1.96TeV, where l is an electron or muon. Using data corresponding to integrated luminosity 5.4fb^-1, collected with the D0 detector Fermilab Collider, we find that relative anti-protons and protons are agreement each other. Combining two correcting for acceptance obtain forward-backward asymmetry A^l_FB = (5.8 +- 5.1(stat)...
We present a measurement of the muon charge asymmetry from decay $W$ boson via $W\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\nu}$ using $7.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity collected with D0 detector at Fermilab Tevatron Collider $\sqrt{s}=1.96\text{ }\mathrm{TeV}$. The is presented in two kinematic regions transverse momentum and event missing energy: (${p}_{T}^{\ensuremath{\mu}}>25\text{ }\mathrm{GeV}$,...
We present measurements of asymmetries in angular distributions leptons produced ttbar events proton-antiproton collisions at the Fermilab Tevatron Collider. consider final states where W bosons from top quark and antiquark decays both decay into l nu (l=e, mu) resulting oppositely charged dilepton with accompanying jets. Using 9.7 fb^-1 integrated luminosity collected D0 detector, we find lepton pseudorapidity compatible predictions based on standard model.
We present a study of the inclusive production $X(4140)$ state with decay to $J/\ensuremath{\psi}\ensuremath{\phi}$ final in hadronic collisions. Based on $10.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collision data collected by D0 experiment at Fermilab Tevatron collider, we report first evidence for prompt an and find fraction events originating from $b$ hadrons be...
We present a search for anomalous components of the quartic gauge boson coupling WW{\gamma}{\gamma} in events with an electron, positron and missing transverse energy. The analyzed data correspond to 9.7 fb^-1 integrated luminosity collected by D0 detector ppbar collisions at sqrt(s) = 1.96 TeV. presence couplings would manifest itself as excess boosted WW events. No such is found data, we set most stringent limits date on parameters a_0^W a_C^W. When form factor Lambda_cutoff 0.5 TeV used,...
We use a sample of diphoton+dijet events to measure the effective cross section double parton interactions, which characterizes area containing interacting partons in proton-antiproton collisions, and find it be σeff=19.3±1.4(stat)±7.8(syst) mb. The was collected by D0 detector at Fermilab Tevatron collider p¯p collisions √s=1.96 TeV corresponds an integrated luminosity 8.7 fb−1.Received 17 December 2015DOI:https://doi.org/10.1103/PhysRevD.93.052008© 2016 American Physical SocietyPhysics...