Ilje Cho

activity

20072025

most citedFirst M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole

4.3k citations · 7.2k across the 34 of their papers we have counts for

collaborators

34 papers

astro-ph.HE2025★ 20 cited

Horizon-scale variability of M87* from 2017--2021 EHT observations

The Event Horizon Telescope Collaboration

We report three epochs of polarized images of M87* at 230\,GHz using data from the Event Horizon Telescope (EHT) taken in 2017, 2018, and 2021. The baseline coverage of the 2021 ob…

astro-ph.IM2024★ 33 cited

Selective Dynamical Imaging of Interferometric Data

Joseph Farah, Peter Galison, Kazunori Akiyama +16

Recent developments in very long baseline interferometry (VLBI) have made it possible for the Event Horizon Telescope (EHT) to resolve the innermost accretion flows of the largest…

astro-ph.HE2023★ 376 cited

First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multi-wavelength Observations, Data Processing, and Calibration

The Event Horizon Telescope Collaboration

We present Event Horizon Telescope (EHT) 1.3 mm measurements of the radio source located at the position of the supermassive black hole Sagittarius A* (Sgr A*), collected during th…

astro-ph.GA2019★ 4.3k cited

First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole

The Event Horizon Telescope Collaboration

When surrounded by a transparent emission region, black holes are expected to reveal a dark shadow caused by gravitational light bending and photon capture at the event horizon. To…

hep-ex2014★ 427 cited

The Physics of the B Factories

A. J. Bevan, B. Golob, Th. Mannel +2003

This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and da…

hep-ex2013★ 96 cited

Measurement of the Branching Fraction Br(Lambda_c+ -> p K- pi+)

A. Zupanc, C. Bartel, N. Gabyshev +184

We present the first model-independent measurement of the absolute branching fraction of the Lambda_c+ -> p K- pi+ decay using a data sample of 978 fb^-1 collected with the Belle d…

hep-ex2011★ 610 cited

Observation of two charged bottomonium-like resonances in Y(5S) decays

the Belle Collaboration

We report the observation of two narrow structures in the mass spectra of the pi+-Y(nS) (n=1,2,3) and pi+-hb(mP)(m$ (m=1,2) pairs that are produced in association with a single cha…

hep-ex2011★ 45 cited

Search for Lepton-number-violating B+->D-l+l'+ Decays

O. Seon, Y. J. Kwon, T. Iijima

We perform the first search for lepton-number-violating B+->D-l+l'+ decays, where l and l' stand for e or mu, using 772 x 10^6 BB-bar pairs accumulated at the Upsilon(4S) resonance…

hep-ex2011★ 13 cited

Observation of $D^{+} \to K^{+} η^{(')}$ and Search for CP Violation in $D^{+} \to π^{+} η^{(')}$ Decays

E. Won, B. R. Ko

We report the first observation of the doubly Cabibbo-suppressed decays $D^{+} \to K^{+} η^{(')}$ using a 791 fb $^{- 1}$ data sample collected with the Belle detector at th…

hep-ex2011★ 152 cited

First observation of the P-wave spin-singlet bottomonium states h_b(1P) and h_b(2P)

Belle Collaboration

We report the first observation of the spin-singlet bottomonium states h_b(1P) and h_b(2P) produced in the reaction e+e- --> hb(nP)pi+pi- using a 121.4fb-1 data sample collected at…

hep-ex2011★ 60 cited

Observation of $B_{s}^{0} \to J / ψ f_{0} (980)$ and Evidence for $B_{s}^{0} \to J / ψ f_{0} (1370)$

Jin Li

We report the first observation of $B_{s}^{0} \to J / ψ f_{0} (980)$ and first evidence for $B_{s}^{0} \to J / ψ f_{0} (1370)$ , which are CP eigenstate decay modes. These results are obtained from $121.…

hep-ex2011★ 14 cited

Search for CP Violation in the Decays $D^{0} \to K_{S}^{0} P^{0}$

B. R. Ko, E. Won

We have searched for CP violation in the decays $D^{0} \to K_{S}^{0} P^{0}$ where $P^{0}$ denotes a neutral pseudo-scalar meson which is either a $π^{0}$ , $η$ , or $η^{'}$ using KEKB asymme…

hep-ex2010★ 30 cited

Search for a Low Mass Particle Decaying into mu^+ mu^- in B0-> K*0 X and B0-> rho0 X at Belle

H. J. Hyun, H. K. Park, H. O. Kim +1

We search for dimuon decays of a low mass particle in the decays B0->K*0 X and B0->rho X using a data sample of 657x10^6 B Bbar events collected with the Belle detector at the KEKB…

hep-ex2010★ 46 cited

Search for leptonic decays of D0 mesons

M. Petrič, M. Starič

We search for the flavor-changing neutral current decays D0\to mu+mu- and D0\to e+e-, and for the lepton-flavor violating decays D0\to e\pm mu\mp using 660 fb^-1 of data collected…

hep-ex2010★ 19 cited

Search for $B^{0} \to K^{* 0} K^{* 0}$ , $B^{0} \to K^{* 0} K^{* 0}$ and $B^{0} \to K^{+} π^{-} K^{\mp} π^{\pm}$ Decays

C. -C. Chiang

We report a search for the decays $B^{0} \to K^{* 0} K^{* 0}$ and $B^{0} \to K^{* 0} K^{* 0}$ . We also measure other charmless decay modes with $K^{+} π^{-} K^{-} π^{+}$ and $K^{+}π^{-}K^{…

hep-ex2010★ 37 cited

Measurement of the branching fractions and the invariant mass distributions for tau^- -> h^-h^+h^-nu_tau decays

M. J. Lee

We present a study of tau->pipipinu, tau->Kpipinu, tau->KKpinu, and tau->KKKnu decays using a 666 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e…

hep-ex2009★ 131 cited

Evidence for a new resonance and search for the Y(4140) in $γ γ \to ϕ J / ψ$

The Belle Collaboration, C. P. Shen

The process $γγ\to ϕ\jpsi$ is measured for $ϕ\jpsi$ masses between threshold and 5 GeV/ $c^{2}$ , using a data sample of 825 fb $^{- 1}$ collected with the Belle detector. A narrow…

hep-ex2009★ 43 cited

Measurement Of |V_ub| From Inclusive Charmless Semileptonic B Decays

The Belle Collaboration

We present the partial branching fraction for inclusive charmless semileptonic B decays and the corresponding value of the CKM matrix element |Vub|, using a multivariate analysis m…

hep-ex2009★ 8 cited

Measurement of cross sections of exclusive $e^{+} e^{-} \to V P$ processes at $s = 10.58$ GeV

K. Belous, M. Shapkin

The cross sections for the reactions $e^{+} e^{-} \to ϕ η, ϕ η^{'}, ρ η, ρ η^{'}$ have been measured using a data sample of 516 fb $^{- 1}$ collected with the Belle detector at th…

hep-ex2009★ 8 cited

Search for the X(1812) in $B^{\pm} \to K^{\pm} ω ϕ$

The Belle Collaboration, C. Liu, Z. P. Zhang

We report on a search for the X(1812) state in the decay $B^{\pm} \to K^{\pm} ω ϕ$ with a data sample of $657 \times 1 0^{6}$ $B B ˉ$ pairs collected with the Belle detector at the KE…

hep-ex2009★ 11 cited

Observation of the Doubly Cabibbo-Suppressed Decay $D_{s}^{+} \to K^{+} K^{+} π^{-}$

Belle Collaboration, B. R. Ko, E. Won

We report the first observation of the doubly Cabibbo-suppressed decay $D_{s}^{+} \to K^{+} K^{+} π^{-}$ using 605 fb $^{- 1}$ of data collected with the Belle detector at the KEKB asymmetric-ene…

hep-ex2009★ 5 cited

Evidence of time-dependent CP violation in the decay B0 to D+D-

K. Vervink, T. Aushev, O. Schneider

We report a measurement of the CP-odd fraction and the time-dependent CP violation in B0 to D*+D*- decays, using 657.10^6 BBbar events collected at the Upsilon(4S) resonance with t…

hep-ex2008★ 229 cited

Observation of two resonance-like structures in the pi+ chi_c1 mass distribution in exclusive B0-bar --> K- pi+ chi_c1 decays

R. Mizuk, R. Chistov

We report the first observation of two resonance-like structures in the pi+ chi_c1 invariant mass distribution near 4.1 GeV/c^2 in exclusive B0-bar --> K- pi+ chi_c1 decays. From a…

hep-ex2008★ 25 cited

Measurement of branching fractions, isospin and CP-violating asymmetries for exclusive \boldmath $b \to d γ$ modes

N. Taniguchi, M. Nakao, S. Nishida

We report new measurements of the decays $B \to ρ^{+} γ$ , $B \to ρ^{0} γ$ and $B \to ω γ$ using a data sample of $657 \times 1 0^{6}$ $B$ meson pairs accumulated with the Belle detector at t…

Horizon-scale variability of M87* from 2017--2021 EHT observations

Selective Dynamical Imaging of Interferometric Data

First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multi-wavelength Observations, Data Processing, and Calibration

First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole

The Physics of the B Factories

Measurement of the Branching Fraction Br(Lambda_c+ -> p K- pi+)

Observation of two charged bottomonium-like resonances in Y(5S) decays

Search for Lepton-number-violating B+->D-l+l'+ Decays

Observation of D+→K+η(′) and Search for CP Violation in D+→π+η(′) Decays

First observation of the P-wave spin-singlet bottomonium states h_b(1P) and h_b(2P)

Observation of Bs0​→J/ψf0​(980) and Evidence for Bs0​→J/ψf0​(1370)

Search for CP Violation in the Decays D0→KS0​P0

Search for a Low Mass Particle Decaying into mu^+ mu^- in B0-> K*0 X and B0-> rho0 X at Belle

Search for leptonic decays of D0 mesons

Search for B0→K∗0K∗0, B0→K∗0K∗0 and B0→K+π−K∓π± Decays

Measurement of the branching fractions and the invariant mass distributions for tau^- -> h^-h^+h^-nu_tau decays

Evidence for a new resonance and search for the Y(4140) in γγ→ϕJ/ψ

Measurement Of |V_ub| From Inclusive Charmless Semileptonic B Decays

Measurement of cross sections of exclusive e+e−→VP processes at s​=10.58 GeV

Search for the X(1812) in B±→K±ωϕ

Observation of the Doubly Cabibbo-Suppressed Decay Ds+​→K+K+π−

Evidence of time-dependent CP violation in the decay B0 to D*+D*-

Observation of two resonance-like structures in the pi+ chi_c1 mass distribution in exclusive B0-bar --> K- pi+ chi_c1 decays

Measurement of branching fractions, isospin and CP-violating asymmetries for exclusive \boldmathb→dγ modes

Observation of $D^{+} \to K^{+} η^{(')}$ and Search for CP Violation in $D^{+} \to π^{+} η^{(')}$ Decays

Observation of $B_{s}^{0} \to J / ψ f_{0} (980)$ and Evidence for $B_{s}^{0} \to J / ψ f_{0} (1370)$

Search for CP Violation in the Decays $D^{0} \to K_{S}^{0} P^{0}$

Search for $B^{0} \to K^{* 0} K^{* 0}$ , $B^{0} \to K^{* 0} K^{* 0}$ and $B^{0} \to K^{+} π^{-} K^{\mp} π^{\pm}$ Decays

Evidence for a new resonance and search for the Y(4140) in $γ γ \to ϕ J / ψ$

Measurement of cross sections of exclusive $e^{+} e^{-} \to V P$ processes at $s = 10.58$ GeV

Search for the X(1812) in $B^{\pm} \to K^{\pm} ω ϕ$

Observation of the Doubly Cabibbo-Suppressed Decay $D_{s}^{+} \to K^{+} K^{+} π^{-}$

Evidence of time-dependent CP violation in the decay B0 to D+D-

Measurement of branching fractions, isospin and CP-violating asymmetries for exclusive \boldmath $b \to d γ$ modes