P. C. Bhat
A5057579026- 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
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- International Science and Diplomacy
- Superconducting Materials and Applications
- Distributed and Parallel Computing Systems
- Particle accelerators and beam dynamics
- Radiation Therapy and Dosimetry
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Gamma-ray bursts and supernovae
- Neural Networks and Applications
- Noncommutative and Quantum Gravity Theories
- Nuclear physics research studies
- Scientific Research and Discoveries
- Radiation Detection and Scintillator Technologies
Fermi National Accelerator Laboratory
2016-2025
University of Antwerp
2023-2024
European Organization for Nuclear Research
2012-2024
Institute of High Energy Physics
2022-2024
A. Alikhanyan National Laboratory
2022-2024
Vrije Universiteit Brussel
2023-2024
Northwestern University
2023
ARC Centre of Excellence for Particle Physics at the Terascale
2019
The University of Melbourne
2019
Centro Brasileiro de Pesquisas Físicas
2016
We report the observation of X(3872) in J/psipi(+)pi(-) channel, with J/psi decaying to mu(+)mu(-), pp collisions at sqrt[s]=1.96 TeV. Using approximately 230 pb(-1) data collected Run II D0 detector, we observe 522+/-100 candidates. The mass difference between state and is measured be 774.9+/-3.1(stat)+/-3.0(syst) MeV/c(2). have investigated production decay characteristics find them similar those psi(2S) state.
We report observation of the electroweak production single top quarks in $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ based on $2.3\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data collected by D0 detector Fermilab Tevatron Collider. Using events containing an isolated electron or muon and missing transverse energy, together with jets originating from fragmentation $b$ quarks, we measure a cross section...
We report on a measurement of the inclusive jet cross section in pp[over ] collisions at center-of-mass energy sqrt[s]=1.96 TeV using data collected by D0 experiment Fermilab Tevatron Collider corresponding to an integrated luminosity 0.70 fb;{-1}. The cover transverse momenta from 50 600 GeV and rapidities range -2.4 2.4. Detailed studies correlations between systematic uncertainties momentum rapidity are presented, measurements found be good agreement with next-to-leading order QCD calculations.
We present a measurement of forward-backward asymmetry in top quark-antiquark production proton-antiproton collisions the final state containing lepton and at least four jets. Using dataset corresponding to an integrated luminosity $5.4\,\mathrm {fb}^{-1}$, collected by \DZ\ experiment Fermilab Tevatron Collider, we measure \ttbar\ be $(9.2 \pm 3.7)$% reconstruction level. When corrected for detector acceptance resolution, is found $(19.6 6.5)$%. also based on from quark decay, $(15.2...
We combine searches by the CDF and D0 Collaborations for associated production of a Higgs boson with $W$ or $Z$ subsequent decay to bottom-antibottom quark pair. The data, originating from Fermilab Tevatron $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$, correspond integrated luminosities up $9.7\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. are conducted mass in range $100--150\text{ }\mathrm{GeV}/{c}^{2}$. observe an excess events data compared background predictions,...
Abstract A multi-TeV muon collider offers a spectacular opportunity in the direct exploration of energy frontier. Offering combination unprecedented collisions comparatively clean leptonic environment, high has unique potential to provide both precision measurements and highest reach one machine that cannot be paralleled by any currently available technology. The topic generated lot excitement Snowmass meetings continues attract large number supporters, including many from early career...
We present the first measurement of integrated forward-backward charge asymmetry in top-quark–top-antiquark pair (t¯t) production proton-antiproton (p¯p) collisions lepton+jets final state. Using a b-jet tagging algorithm and kinematic reconstruction assuming t¯t+X decay, sample 0.9 fb−1 data, collected by D0 experiment at Fermilab Tevatron Collider, is used to measure for different jet multiplicities. The result also set upper limits on via Z′ resonance.Received 7 December...
From an analysis of the flavor-tagged decay ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}$ we obtain width difference between ${B}_{s}^{0}$ light and heavy mass eigenstates, $\ensuremath{\Delta}{\ensuremath{\Gamma}}_{s}=0.19\ifmmode\pm\else\textpm\fi{}0.07(\mathrm{stat}{)}_{\ensuremath{-}0.01}^{+0.02}(\mathrm{syst})\text{ }\text{ }{\mathrm{ps}}^{\ensuremath{-}1}$, $CP$-violating phase,...
We report results of a study the ${B}_{s}^{0}$ oscillation frequency using large sample semileptonic decays corresponding to approximately $1\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity collected by D0 experiment at Fermilab Tevatron Collider in 2002--2006. The amplitude method gives lower limit on $14.8\text{ }{\mathrm{ps}}^{\ensuremath{-}1}$ 95% C.L. At $\ensuremath{\Delta}{m}_{s}=19\text{ }{\mathrm{ps}}^{\ensuremath{-}1}$, deviates from hypothesis $\mathcal{A}=0$...
We measure the charge asymmetry A ≡ (N++ - N--)/(N++ + N--) of like-sign dimuon events in 6.1 fb-1 pp collisions recorded with D0 detector at a center-of-mass energy square root(s) = 1.96 TeV Fermilab Tevatron collider. From we extract semileptonic b-hadron decays: A(sl)(b) -0.009 57 ± 0.002 51(stat) 0.001 46(sys). It differs by 3.2 standard deviations from model prediction A(sl)(b)(SM) (-2.3(-0.6)(+0.5)) × 10(-4), and provides first evidence anomalous CP violation mixing neutral B mesons.
We have used a sample of $\ensuremath{\gamma}+3$ jets events collected by the D0 experiment with an integrated luminosity about $1\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ to determine fraction double parton scattering (${f}_{\mathrm{DP}}$) in single $p\overline{p}$ collision at $\sqrt{s}=1.96\text{ }\mathrm{TeV}$. The DP and effective cross section (${\ensuremath{\sigma}}_{\mathrm{eff}}$), process-independent scale parameter related density inside nucleon, are measured three...
The top quark is the heaviest known elementary particle, with a mass about 40 times larger than of its isospin partner, bottom quark. It decays almost 100% time to $W$ boson and Using top-antitop pairs at Tevatron proton-antiproton collider, CDF D0 Collaborations have measured quark's in different final states for integrated luminosities up $5.8\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. This paper reports on combination these measurements that results more precise value any individual...
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 combine searches by the CDF and D0 Collaborations for standard model Higgs boson with mass in range 90--200 GeV$/c^2$ produced gluon-gluon fusion, $WH$, $ZH$, $t{\bar{t}}H$, vector fusion processes, decaying $H\rightarrow b{\bar{b}}$, W^+W^-$, ZZ$, $H\rightarrow\tau^+\tau^-$, \gamma\gamma$ modes. The data correspond to integrated luminosities of up 10 fb$^{-1}$ were collected at Fermilab Tevatron $p{\bar{p}}$ collisions $\sqrt{s}=1.96$ TeV. are also interpreted context fermiophobic fourth...
We measure the charge asymmetry $A$ of like-sign dimuon events in 6.1 fb$^{-1}$ $p\bar{p}$ collisions recorded with D0 detector at a center-of-mass energy $\sqrt{s} = 1.96$ TeV Fermilab Tevatron collider. From $A$, we extract semileptonic $b$-hadron decays: $\aslb -0.00957 \pm 0.00251 ({\rm stat}) 0.00146 syst})$. This result differs by 3.2 standard deviations from model prediction $\aslb(SM) (-2.3^{+0.5}_{-0.6}) \times 10^{-4}$ and provides first evidence anomalous CP-violation mixing...
We combine searches by the CDF and D0 Collaborations for a Higgs boson decaying to ${W}^{+}{W}^{\ensuremath{-}}$. The data correspond an integrated total luminosity of 4.8 (CDF) 5.4 (D0) ${\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ Fermilab Tevatron collider. No excess is observed above background expectation, resulting limits on production exclude standard model in mass range 162--166 GeV 95% C.L.
We present a search for charged Higgs bosons in top quark decays. analyze the \eplus, \muplus, $ee$, $eμ$, $μμ$, \etau and \mutau final states from pair production events, using data about 1${\text{fb}}^{-1}$ of integrated luminosity recorded by \dzero experiment at Fermilab Tevatron Collider. consider different scenarios possible boson decays, one where decays purely hadronically into charm strange quark, another it $τ$ lepton neutrino third both appear. extract limits on branching ratio...
We present an updated measurement of the anomalous like-sign dimuon charge asymmetry Aslb for semi-leptonic $b$-hadron decays in 9.0 fb^-1 p pbar collisions recorded with D0 detector at a center-of-mass energy sqrt{s} = 1.96 TeV Fermilab Tevatron collider. obtain (-0.787 +- 0.172(stat) 0.093 (syst))%. This result differs by 3.9 standard deviations from prediction model and provides evidence anomalously large CP violation neutral B decay. The dependence on muon impact parameter is consistent...
We present the results of a search for flavor changing neutral current decay B_s^0->mu^+mu^- using 6.1 fb^-1 ppbar collisions at sqrt(s) = 1.96 TeV collected by D0 experiment Fermilab Tevatron Collider. The observed number B_s^0 candidates is consistent with background expectations. resulting upper limit on branching fraction BR(B_s^0->mu^+mu^-) < 5.1 x 10^-8 95% C.L. This factor 2.4 better than that previous analysis and best to date.
We present a measurement of the W boson mass using data corresponding to 4.3fb^-1 integrated luminosity collected with D0 detector during Run II at Fermilab Tevatron p\bar{p} collider. With sample 1,677,394 -> e\nu candidate events, we measure M_W = 80.367 +/- 0.026 GeV. This result is combined an earlier determined independent sample, 1fb^-1 luminosity, yield 80.375 0.023
We report an updated measurement of the $CP$-violating phase, ${\ensuremath{\phi}}_{s}^{J/\ensuremath{\psi}\ensuremath{\phi}}$, and decay-width difference for two mass eigenstates, $\ensuremath{\Delta}{\ensuremath{\Gamma}}_{s}$, from flavor-tagged decay ${B}_{s}^{0}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}$. The data sample corresponds to integrated luminosity $8.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ accumulated with D0 detector using $p\overline{p}$ collisions...
We summarize and combine direct measurements of the mass $W$ boson in $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ proton-antiproton collision data collected by CDF D0 experiments at Fermilab Tevatron Collider. Earlier from are combined with two latest, more precise measurements: a measurement electron muon channels using corresponding to $2.2\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity, channel $4.3\text{ luminosity. The resulting average for is...
The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in 2030s. ILC addresses key questions for our current understanding of particle physics. It based proven technology. Its experiments will challenge Standard Model physics and provide window to look beyond it. This document brings story up date, emphasizing its strong motivation, readiness construction, opportunity it presents US community.
Abstract Construction of an e + - Higgs factory has been identified as a major goal for particle physics. Such collider will offer precise measurements the bosons couplings to other particles. A extendable in energy can also establish self-coupling, measure coupling top quark, and expand reach probe new phenomena. We propose strategy energy-extendable based on linear accelerator technology. This offers compact cost-effective design that could be realized project US. The core technologies...