A5106487457- 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
- Black Holes and Theoretical Physics
- Neutrino Physics Research
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Noncommutative and Quantum Gravity Theories
- Quantum and electron transport phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Gender and Women's Rights
- Quantum many-body systems
Universität Hamburg
2025
Birla Institute of Technology and Science, Pilani
2025
University of Delhi
2012-2024
Centro Brasileiro de Pesquisas Físicas
2013-2016
Institut National de Physique Nucléaire et de Physique des Particules
2010-2016
Centre National de la Recherche Scientifique
2010-2016
Charles University
2010-2016
Universidade Federal do ABC
2009-2016
University of Science and Technology of China
2009-2016
Universidad San Francisco de Quito
2009-2016
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.
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 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...
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...
Using data corresponding to an integrated luminosity of $1.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, we observe a narrow mass state decaying into $\ensuremath{\Upsilon}(1S)+\ensuremath{\gamma}$, where the $\ensuremath{\Upsilon}(1S)$ meson is detected by its decay pair oppositely charged muons, and photon identified through conversion electron-positron pair. The significance this observation 5.6 standard deviations. centered at...
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,...
A fundamental longstanding problem in studying spin models is the efficient and accurate numerical simulation of long-time behavior larger systems. The exponential growth Hilbert space entanglement accumulation at long times pose major challenges for current methods. To address these issues, we employ multilayer multiconfiguration time-dependent Hartree (ML-MCTDH) framework to simulate many-body dynamics Heisenberg model various settings, including Ising XYZ limits with different interaction...
We present searches for the anomalous γWW and ZWW trilinear gauge boson couplings from WW WZ production using lepton plus dijet final states a combination with results Wγ, WW, leptonic states. The analyzed data correspond to up 8.6fb−1 of integrated luminosity collected by D0 detector in pp¯ collisions at s=1.96TeV. set most stringent limits hadron collider date assuming two different relations between coupling parameters Δκγ, λ, Δg1Z cutoff energy scale Λ=2TeV. combined 68% C.L. are...
We present a measurement of the time-integrated flavor-specific semileptonic charge asymmetry in decays ${B}_{s}^{0}$ mesons that have undergone flavor mixing, ${a}_{\mathrm{sl}}^{s}$, using ${B}_{s}^{0}({\overline{B}}_{s}^{0})\ensuremath{\rightarrow}{D}_{s}^{\ensuremath{\mp}}{\ensuremath{\mu}}^{\ifmmode\pm\else\textpm\fi{}}X$ decays, with ${D}_{s}^{\ensuremath{\mp}}\ensuremath{\rightarrow}\ensuremath{\phi}{\ensuremath{\pi}}^{\ensuremath{\mp}}$ and...
We present measurements of the differential cross section dσ/dpTγ for associated production a c-quark jet and an isolated photon with rapidity |yγ|<1.0 transverse momentum 30<pTγ<300GeV. The jets are required to have |yjet|<1.5 pTjet>15GeV. ratio sections γ+c γ+b as function pTγ is also presented. results based on data corresponding integrated luminosity 8.7fb−1 recorded D0 detector at Fermilab Tevatron pp¯ Collider s=1.96TeV. obtained compared next-to-leading order perturbative QCD...
We present the results of combination searches for standard model Higgs boson produced in association with a $W$ or $Z$ and decaying into $b\overline{b}$ using data sample collected D0 detector $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ Fermilab Tevatron Collider. derive 95% C.L. upper limits on cross section relative to prediction mass range $100\text{ }\mathrm{GeV}\ensuremath{\le}{M}_{H}\ensuremath{\le}150\text{ }\mathrm{GeV}$, we exclude bosons masses...