Yonsei University

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19932026

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

4.3k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 2009 · hep-exShow all

25 papers · 2 filters

hep-ex2009★ 149 cited

Observation of a charmonium-like enhancement in the gamma gamma --> omega J/psi process

The Belle Collaboration, S. Uehara

We report the results of a search for a charmonium-like state produced in the process gamma gamma --> omega J/psi in the 3.9-4.2 GeV/c^2 mass region. We observe a significant enhan…

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★ 85 cited

Transverse momentum dependence of J/psi polarization at midrapidity in p+p collisions at sqrt(s)=200 GeV

PHENIX Collaboration, A. Adare

We report the measurement of the transverse momentum dependence of inclusive J/psi polarization in p+p collisions at sqrt(s)=200 GeV performed by the PHENIX Experiment at RHIC. The…

hep-ex2009★ 147 cited

First proton-proton collisions at the LHC as observed with the ALICE detector: measurement of the charged particle pseudorapidity density at $s$ = 900 GeV

ALICE Collaboration

On 23rd November 2009, during the early commissioning of the CERN Large Hadron Collider (LHC), two counter-rotating proton bunches were circulated for the first time concurrently i…

hep-ex2009★ 11 cited

Observation of B+ to p Lambdabar pi+ pi- at Belle

P. Chen, M. -Z. Wang

We study charmless $B^{+}$ meson decays to the $p Λ ˉ π^{+} π^{-}$ final state using a $605 fb^{- 1}$ data sample collected at the $Υ (4 S)$ resonance with the Belle detector at the…

hep-ex2009★ 8 cited

Double Helicity Dependence of Jet Properties from Dihadrons in Longitudinally Polarized p+p Collisions at sqrt(s) = 200 GeV

PHENIX Collaboration

It has been postulated that partonic orbital angular momentum can lead to a significant double-helicity dependence in the net transverse momentum of Drell-Yan dileptons produced in…

hep-ex2009★ 6 cited

First Measurement of Inclusive B -> X_s eta Decays

Belle Collaboration, K. Nishimura, T. E. Browder +140

We report a first measurement of inclusive B -> X_s eta decays, where X_s is a charmless state with unit strangeness. The measurement is based on a pseudo-inclusive reconstruction…

hep-ex2009★ 10 cited

Measurement of $D^{+} \to K_{S}^{0} K^{+}$ and $D_{s}^{+} \to K_{S}^{0} π^{+}$ branching ratios

E. Won, B. R. Ko

We report an improved measurement of $D^{+} \to K_{S}^{0} K^{+}$ and $D_{s}^{+} \to K_{S}^{0} π^{+}$ branching ratios using 605 fb $^{- 1}$ of data collected with the Belle detector at the KEKB asymmet…

hep-ex2009★ 17 cited

Search for Lepton Flavor and Lepton Number Violating tau Decays into a Lepton and Two Charged Mesons

Y. Miyazaki

We search for lepton flavor and lepton number violating tau decays into a lepton (ell = electron or muon) and two charged mesons (h,h' = pi^\pm or K^\pm), tau- -> ell-h+h'- and tau…

hep-ex2009★ 80 cited

Measurement of the e+e- --> D0D*-pi+ cross section using initial-state radiation

Belle Collaboration, G. Pakhlova

We report measurements of the exclusive cross section for e+e- --> D0D*-pi+ as function of center-of-mass energy from the D0D*-pi+ threshold to 5.2 GeV with initial-state radiation…

hep-ex2009★ 103 cited

Measurement of Inclusive Radiative B-meson Decays with a Photon Energy Threshold of 1.7 GeV

A. Limosani

Using 605/fb of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B to X_s gamma. For the lower photon energy t…

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★ 85 cited

High-statistics study of ${\boldmath ηπ^0}$ production in two-photon collisions

S. Uehara

The differential cross section for the process $γ γ \to η π^{0}$ has been measured in the kinematic range $0.84 \GeV < W < 4.0 \GeV$, $∣ cos θ^{*} ∣ < 0.8$ , where $W$ and $θ^{*}$ are the energ…

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★ 23 cited

Measurement of $y_{C P}$ in $D^{0}$ meson decays to the $K_{S}^{0} K^{+} K^{-}$ final state

The Belle Collaboration

We present a measurement of the $D^{0}$ - $D^{0}$ mixing parameter $y_{C P}$ using a flavor-untagged sample of $D^{0} \to K_{S}^{0} K^{+} K^{-}$ decays. The measurement is based on a 673…

hep-ex2009★ 146 cited

Dalitz analysis of B --> K pi psi' decays and the Z(4430)+

R. Mizuk

From a Dalitz plot analysis of B --> K pi psi' decays, we find a signal for Z(4430)+ --> pi+ psi' with a mass M= (4443(+15-12)(+19-13))MeV/c^2, width Gamma= (107(+86-43)(+74-56))Me…

hep-ex2009★ 17 cited

Measurements of Charmless Hadronic b->s Penguin Decays in the pi+pi-K+pi- Final State and First Observation of B0 -> rho0K+pi-

Belle Collaboration, S. -H. Kyeong, Y. -J. Kwon

We report measurements of charmless hadronic B^0 decays into the pi+pi-K+pi+ final state. The analysis uses a sample of 657x10^6 BBbar pairs collected with the Belle detector at th…

hep-ex2009★ 25 cited

Measurement of $B \to D_{s}^{(*)} K π$ branching fractions

The Belle Collaboration, J. Wiechczynski, T. Lesiak

We report a measurement of the exclusive $B^{+}$ meson decay to the $D_{s}^{(*) -} K^{+} π^{+}$ final state using $657 \times 1 0^{6} B B$ pairs collected at the $Υ (4 S)$ resonance w…

hep-ex2009★ 96 cited

Measurement of Bottom versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at sqrt(s)=200 GeV

PHENIX Collaboration, A. Adare

The momentum distribution of electrons from semi-leptonic decays of charm and bottom for mid-rapidity |y|<0.35 in p+p collisions at sqrt(s)=200 GeV is measured by the PHENIX experi…

hep-ex2009★ 57 cited

High-statistics study of neutral-pion pair production in two-photon collisions

S. Uehara

The differential cross sections for the process $γ γ \to π^{0} π^{0}$ have been measured in the kinematic range 0.6 GeV $< W < 4.1$ GeV, $∣ cos θ^{*} ∣ < 0.8$ in energy and pion scattering an…

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★ 69 cited

Measurement of the e+e- -> J/psi ccbar cross section at \sqrt{s} ~10.6 GeV

P. Pakhlov

We present a new measurement of the e+e- -> J/psi ccbar cross section where the ccbar pair can fragment either into charmed hadrons or a charmonium state. In the former case the J/…

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…

Observation of a charmonium-like enhancement in the gamma gamma --> omega J/psi process

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

Transverse momentum dependence of J/psi polarization at midrapidity in p+p collisions at sqrt(s)=200 GeV

First proton-proton collisions at the LHC as observed with the ALICE detector: measurement of the charged particle pseudorapidity density at s​ = 900 GeV

Observation of B+ to p Lambdabar pi+ pi- at Belle

Double Helicity Dependence of Jet Properties from Dihadrons in Longitudinally Polarized p+p Collisions at sqrt(s) = 200 GeV

First Measurement of Inclusive B -> X_s eta Decays

Measurement of D+→KS0​K+ and Ds+​→KS0​π+ branching ratios

Search for Lepton Flavor and Lepton Number Violating tau Decays into a Lepton and Two Charged Mesons

Measurement of the e+e- --> D0D*-pi+ cross section using initial-state radiation

Measurement of Inclusive Radiative B-meson Decays with a Photon Energy Threshold of 1.7 GeV

Measurement Of |V_ub| From Inclusive Charmless Semileptonic B Decays

High-statistics study of ${\boldmath ηπ^0}$ production in two-photon collisions

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

Measurement of yCP​ in D0 meson decays to the KS0​K+K− final state

Dalitz analysis of B --> K pi psi' decays and the Z(4430)+

Measurements of Charmless Hadronic b->s Penguin Decays in the pi+pi-K+pi- Final State and First Observation of B0 -> rho0K+pi-

Measurement of B→Ds(∗)​Kπ branching fractions

Measurement of Bottom versus Charm as a Function of Transverse Momentum with Electron-Hadron Correlations in p+p Collisions at sqrt(s)=200 GeV

High-statistics study of neutral-pion pair production in two-photon collisions

Search for the X(1812) in B±→K±ωϕ

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

Measurement of the e+e- -> J/psi ccbar cross section at \sqrt{s} ~10.6 GeV

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

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

First proton-proton collisions at the LHC as observed with the ALICE detector: measurement of the charged particle pseudorapidity density at $s$ = 900 GeV

Measurement of $D^{+} \to K_{S}^{0} K^{+}$ and $D_{s}^{+} \to K_{S}^{0} π^{+}$ branching ratios

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

Measurement of $y_{C P}$ in $D^{0}$ meson decays to the $K_{S}^{0} K^{+} K^{-}$ final state

Measurement of $B \to D_{s}^{(*)} K π$ branching fractions

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-