A5031613595- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Medical Imaging Techniques and Applications
- Noncommutative and Quantum Gravity Theories
- Advanced Condensed Matter Physics
- Radiation Therapy and Dosimetry
- Muon and positron interactions and applications
- Metabolomics and Mass Spectrometry Studies
- Parallel Computing and Optimization Techniques
- DNA Repair Mechanisms
- Cancer-related Molecular Pathways
Tata Institute of Fundamental Research
2023-2025
Institute of High Energy Physics
2024
University of Antwerp
2024
A. Alikhanyan National Laboratory
2024
Universidade Federal de São Carlos
2022
Tsinghua University
2022
Queen's University Belfast
2022
Dalian University of Technology
2022
Lanzhou Institute of Chemical Physics
2022
Nanjing Tech University
2022
The cross section for ee+ e- → π+ π- J/ψ between 3.8 and 5.5 GeV is measured with a 967 fb(-1) data sample collected by the Belle detector at or near Υ(nS) (n = 1,2,…,5) resonances. Y(4260) state observed, its resonance parameters are determined. In addition, an excess of production around 4 observed. This feature can be described Breit-Wigner parametrization properties that consistent Y(4008) was previously reported Belle. study decays, structure observed in M(π(±)J/ψ) mass spectrum 5.2σ...
We perform a full amplitude analysis of B0→ψ′K+π− decays, with ψ′→μ+μ− or e+e−, to constrain the spin and parity Z(4430)−. The JP=1+ hypothesis is favored over 0−, 1−, 2− 2+ hypotheses at levels 3.4σ, 3.7σ, 4.7σ 5.1σ, respectively. based on 711 fb−1 data sample that contains 772×106 BB¯ pairs collected Υ(4S) resonance by Belle detector asymmetric-energy e+e− collider KEKB.7 MoreReceived 20 June 2013DOI:https://doi.org/10.1103/PhysRevD.88.074026© 2013 American Physical Society
We present a measurement of angular observables, $P_4'$, $P_5'$, $P_6'$, $P_8'$, in the decay $B^0 \to K^\ast(892)^0 \ell^+ \ell^-$, where $\ell^+\ell^-$ is either $e^+e^-$ or $\mu^+\mu^-$. The analysis performed on data sample corresponding to an integrated luminosity $711~\mathrm{fb}^{-1}$ containing $772\times 10^{6}$ $B\bar B$ pairs, collected at $\Upsilon(4S)$ resonance with Belle detector asymmetric-energy collider KEKB. Four $P_{4,5,6,8}'$ are extracted five bins invariant mass...
We present the first model-independent measurement of absolute branching fraction Λ(c)(+) → pK(-)π(+) decay using a data sample 978 fb(-1) collected with Belle detector at KEKB asymmetric-energy e(+)e(-) collider. The number baryons is determined by reconstructing recoiling D((*)-) pπ(+) system in events type pπ(+)Λ(c)(+). measured to be B(Λ(c)(+) pK(-)π(+)) = (6.84 ± 0.24(-0.27)(+0.21))%, where and second uncertainties are statistical systematic, respectively.
We report measurements of B→χ(c1)γK and χ(c2)γK decays using 772×10(6) BB[over ¯] events collected at the Υ(4S) resonance with Belle detector KEKB asymmetric-energy e(+)e(-) collider. Evidence a new in χ(c1)γ final state is found statistical significance 3.8σ. This has mass 3823.1±1.8(stat)±0.7(syst) MeV/c(2), value that consistent theoretical expectations for previously unseen 1(3)D(2) cc[over meson. find no other narrow set upper limits on branching fractions X(3872)→χ(c1)γ χ(c2)γ decays.
We report results of a study doubly charmed baryons and strange baryons. The analysis is performed using $980\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected with the Belle detector at KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. search for ${\mathrm{\ensuremath{\Xi}}}_{cc}^{+(+)}$ ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}({\ensuremath{\pi}}^{+})$...
We report results on studies of the e+e- annihilation into three-body Y(nS)pi+pi- (n=1,2,3) final states including measurements cross sections and full amplitude analysis. The measured at sqrt(s)=10.865 GeV corrected for initial state radiation are sigma(e+e-=>Y(1S)pi+pi-)=(2.27+-0.12+-0.14) pb, sigma(e+e-=>Y(2S)pi+pi-)=(4.07+-0.16+-0.45) sigma(e+e-=>Y(3S)pi+pi-)=(1.46+-0.09+-0.16) pb. Amplitude analysis strongly favors I^G(J^P)=1^+(1^+) quantum-number assignments two bottomonium-like Zb+-...
A bstract We present measurements of absolute branching fractions hadronic and lep-tonic $ D_s^{+} decays to K − + π , {{\overline{K}}^0} ηπ μ ν τ report a search for the leptonic → e decays. The results are obtained from data sample 913 fb −1 collected at or near \varUpsilon (4 S ) (5 resonances with Belle detector KEKB asymmetric-energy collider. measured be \begin{array}{*{20}{c}} {\mathcal{B}\left( {D_s^{+}\ \to\ {K^{-}}{K^{+}}{\pi^{+}}} \right) = \left( {5.06\pm 0.15\pm 0.21}...
We report the first observation of Y(5S) -> Y(nS) pi0 decays. The neutral partner Zb+-(10610), Zb0(10610) decaying to Y(2,3S) pi0, is observed for time with a 6.5 sigma significance using Dalitz analysis results are obtained 121.4 fb^-1 data sample collected Belle detector at resonance KEKB asymmetric-energy e+e- collider.
We report measurements of branching fractions $\tau$ lepton decays to final states with a $K^{0}_{S}$ meson using 669 fb$^{-1}$ data sample accumulated the Belle detector at KEKB asymmetric-energy $e^{+}e^{-}$ collider. The inclusive fraction is measured be $\mathcal{B}(\tau^{-} \to K^{0}_{S}\ X^{-} \nu_{\tau})=(9.15 \pm 0.01 0.15) \times 10^{-3}$, where $X^{-}$ can anything; exclusive are \pi^{-} K^{0}_{S} \nu_{\tau}) = (4.16 0.08) K^{-} (7.40 0.07 0.27) 10^{-4}$, \pi^{0} (1.93 0.02 0.07)...
The precise determination of the CKM matrix element $\left| V_{cb}\right|$ is important for carrying out tests flavour sector Standard Model. In this article we present a preliminary analysis $\bar B^0 \to D^{*\,+} \, \ell^- \bar ν_\ell$ decay mode and its charge conjugate, selected in events that contain fully reconstructed $B$-meson, using 772 million $e^+ e^- Υ(4S) B B$ recorded by Belle detector at KEKB. Unfolded differential rates four kinematic variables describing $B$-meson rest frame...
We develop a manifest supertwistor space formalism for three dimensional $\mathcal{N}=1, 2,3,4$ superconformal field theories. This simultaneously makes the supersymmetry, conformal invariance and conservation. solve two point correlators of (half) integer spin conserved supercurrents using graded supergroup generators. Apart from generators, we find that superhelicity operators are necessary to fix their functional form in this setup. The can be recast into first order Euler equations which...
We present a measurement of the time-dependent charge-parity (CP) violation parameters in B0 -> pi+ pi- decays. The results are obtained from final data sample containing 772 million BBbar pairs collected at Upsilon(4S) resonance with Belle detector KEKB asymmetric-energy e+e- collider. obtain CP Acp = +0.33 +/- 0.06 (stat) 0.03 (syst) and Scp -0.64 0.08 (syst), where represent direct mixing-induced asymmetry, respectively. Using an isospin analysis including other measurements, we find 23.8...
We report a measurement of ${D}^{0}\text{\ensuremath{-}}{\overline{D}}^{0}$ mixing parameters and search for indirect $CP$ violation through time-dependent amplitude analysis ${D}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decays. The results are based on $921\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data accumulated with the Belle detector at KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. Assuming conservation, we...
The cross sections of the processes e+e−→K+K−J/ψ and K0SK0SJ/ψ are measured via initial state radiation at center-of-mass energies between threshold 6.0 GeV using a data sample 980 fb−1 collected with Belle detector on or near Υ(nS) resonances, where n=1,2,…,5. for few pb level average section e+e−→K0SK0SJ/ψ is 1.8±0.6(stat)±0.3(syst) 4.4 5.2 GeV. All them consistent previously published results improved precision. A search resonant structures associated intermediate states in process...
We report a high-statistics measurement of the differential cross section process |$\gamma \gamma \to K^0_S K^0_S$| in range |$1.05\,{\mathrm {GeV}} \leq W 4.00$| GeV, where is center-of-mass energy colliding photons, using 972 fb|$^{-1}$| data collected with Belle detector at KEKB asymmetric-energy |$e^+ e^-$| collider operated and near |$\Upsilon $|-resonance region. The fitted by parameterized S-, D|$_0$|-, D|$_2$|-, G|$_0$|-, G|$_2$|-wave amplitudes. In D|$_2$| wave, |$f_2(1270)$|,...
The lifetime of the τ lepton is measured using process e+e−→τ+τ−, where both leptons decay to 3πντ. result for mean lifetime, based on 711 fb−1 data collected with Belle detector at Υ(4S) resonance and 60 MeV below, τ=(290.17±0.53(stat)±0.33(syst))×10−15 s. first measurement difference between τ+ τ− performed. upper limit relative positive negative |Δτ|/τ<7.0×10−3 90% C.L.Received 1 November 2013DOI:https://doi.org/10.1103/PhysRevLett.112.031801© 2014 American Physical Society
We report the first measurement of $τ$ lepton polarization in decay ${\bar B} \rightarrow D^* τ^- {\barν_τ}$ as well a new ratio branching fractions $R(D^{*}) = \mathcal{B}({\bar {\barν_τ}) / \ell^- {\barν_{\ell}})$, where $\ell^-$ denotes an electron or muon, with decays $τ^- π^- ν_τ$ and ρ^- ν_τ$. use full data sample $772 \times 10^6$ $B{\bar B}$ pairs accumulated Belle detector at KEKB electron-positron collider. Our preliminary results, $R(D^*) 0.276 \pm 0.034{\rm (stat.)} ^{+0.029}...
We present measurements of the masses and decay widths baryonic states ${\mathrm{\ensuremath{\Sigma}}}_{c}(2455{)}^{0/++}$ ${\mathrm{\ensuremath{\Sigma}}}_{c}(2520{)}^{0/++}$ using a data sample corresponding to an integrated luminosity $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected with Belle detector at KEKB ${e}^{+}{e}^{\ensuremath{-}}$ asymmetric-energy collider operating $\mathrm{\ensuremath{\Upsilon}}(4S)$ resonance. report mass differences respect...
We observe $D^0-\bar{D}^0$ mixing in the decay $D^0\rightarrow K^+\pi^-$ using a data sample of integrated luminosity 976 fb$^{-1}$ collected with Belle detector at KEKB $e^+e^-$ asymmetric-energy collider. measure parameters ${x'}^2 = (0.09\pm0.22)\times 10^{-3}$ and $y' (4.6\pm3.4)\times ratio doubly Cabibbo-suppressed to Cabibbo-favored rates $R_D (3.53\pm0.13)\times 10^{-3}$, where uncertainties are statistical systematic combined. Our measurement excludes no-mixing hypothesis 5.1...
We report inclusive and exclusive measurements for ${\ensuremath{\chi}}_{c1}$ ${\ensuremath{\chi}}_{c2}$ production in $B$ decays. measure $\mathcal{B}(B\ensuremath{\rightarrow}{\ensuremath{\chi}}_{c1}X)=(3.03\ifmmode\pm\else\textpm\fi{}0.05(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.24(\mathrm{syst}))\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}$...
We present a study of the branching fraction decay B^0->rho0rho0 and longitudinally polarized rho0 mesons in this decay. The results are obtained from final data sample containing 772 million BBbar pairs collected at Y(4S) resonance with Belle detector KEKB asymmetric-energy e+e- collider. find 166 +- 59 B^0 -> events (including systematic uncertainties), corresponding to B(B^0->rho0rho0) = (1.02 0.30 (stat) 0.15 (syst)) x 10^{-6} significance 3.4 standard deviations longitudinal...
We report the measurements of branching fractions and CP violation asymmetries in $B^0 \to \phi K^{*}$ decays obtained an angular analysis using full data sample $772 \times 10^6 B\bar{B}$ pairs collected at $\Upsilon(4S)$ resonance with Belle detector KEKB asymmetric-energy $e^+ e^-$ collider. perform a partial wave to distinguish among scalar [$B^0 \phi(K\pi)^{*}_{0}$], vector K^{*}(892)^{0}$] tensor K^{*}_{2}(1430)^{0}$] components, determine corresponding be $\mathcal{B}[B^0...