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

4.3k citations

Showing 2011 · hep-exShow all

27 papers · 2 filters

hep-ex2011★ 59 cited

Underlying Event measurements in pp collisions at = 0.9 and 7 TeV with the ALICE experiment at the LHC

ALICE collaboration

We present measurements of Underlying Event observables in pp collisions at = 0.9 and 7 TeV. The analysis is performed as a function of the highest charged-particle tran…

hep-ex2011★ 141 cited

J/ polarization in pp collisions at TeV

ALICE Collaboration

We have studied J/psi production in pp collisions at TeV at the LHC through its muon pair decay. The polar and azimuthal angle distributions of the decay muons were me…

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★ 12 cited

Evidence for Direct CP Violation in and Observation of

C. -T. Hoi, P. Chang

We report measurements of the branching fractions and CP asymmetries for B^+- -> eta h^+- (h = K or pi) and the observation of the decay B^0 -> eta K^0 from the final data sample o…

hep-ex2011★ 21 cited

Search for CP Violation in D Meson Decays to phi pi+

Belle Collaboration, M. Starič, H. Aihara +132

We search for CP violation in Cabibbo-suppressed charged D meson decays by measuring the difference between the CP violating asymmetries for the Cabibbo-suppressed decays D+ -> K+K…

hep-ex2011★ 16 cited

Search for charmonium and charmonium-like states in Υ(2S) radiative decays

X. L. Wang, C. P. Shen, C. Z. Yuan +2

Using a sample of 158 million Υ(2S) events collected with the Belle detector, charmonium and charmonium-like states with even charge parity are searched for in Υ(2S) radiative deca…

hep-ex2011★ 13 cited

Observation of B- to pbar Lambda D0 at Belle

P. Chen, M. -Z. Wang, I. Adachi +137

We study B- meson decays to pbar Lambda D(*)0 final states using a sample of 657 * 10^6 B Bbar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asy…

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 and Search for CP Violation in Decays

E. Won, B. R. Ko

We report the first observation of the doubly Cabibbo-suppressed decays using a 791 fb data sample collected with the Belle detector at th…

hep-ex2011★ 192 cited

Bounds on the width, mass difference and other properties of X(3872) --> pi+pi-J/psi decays

S. -K. Choi, S. L. Olsen, K. Trabelsi

We present results from a study of X(3872) --> pi+pi- J/psi decays produced via exclusive B--> K X(3872) decays. We determine the mass to be M_X(3872)= (3871.84\pm 0.27 (stat)\pm 0…

hep-ex2011★ 104 cited

Ground and excited charmonium state production in p+p collisions at sqrt(s)=200 GeV

A. Adare, S. Afanasiev, C. Aidala +444

We report on charmonium measurements [J/psi(1S), psi'(2S), and chi_c(1P)] in p+p collisions at sqrt(s)=200 GeV. We find that the fraction of J/psi coming from the feed-down decay o…

hep-ex2011★ 28 cited

Study of B^{+-} -> K^{+-}(K_S K pi)^0 Decay and Determination of eta_c and eta_c(2S) Parameters

Belle collaboration, A. Vinokurova, A. Kuzmin +143

We report the results of a study of and decays followed by and decays to . The results are obtained f…

hep-ex2011★ 161 cited

Rapidity and transverse momentum dependence of inclusive J/ production in pp collisions at TeV

ALICE Collaboration

The ALICE experiment at the LHC has studied inclusive J/ production at central and forward rapidities in pp collisions at TeV. In this Letter, we report on the fi…

hep-ex2011★ 150 cited

Observation of and search for in B decays

V. Bhardwaj, K. Trabelsi, J. B. Singh +2

We report a study of and decay modes using events collected at the Υ(4S)$ resonance with the Belle detector at the KEKB…

hep-ex2011★ 10 cited

First Observation of Radiative B^0 -> ϕK^0 γDecays and Measurements of Their Time-Dependent CP Violation

H. Sahoo, T. E. Browder

We report the first observation of the radiative decay B^0 -> ϕK^0 γusing a data sample of 772 x 10^6 B B-bar pairs collected at the Υ(4S) resonance with the Belle detector at the…

hep-ex2011★ 107 cited

Observation of transverse polarization asymmetries of charged pion pairs in e+e- annihilation near sqrt s=10.58 GeV

A. Vossen, R. Seidl, I. Adachi +97

The interference fragmentation function translates the fragmentation of a quark with a transverse projection of the spin into an azimuthal asymmetry of two final-state hadrons. In…

hep-ex2011★ 10 cited

Study of the decays B->D_s1(2536)+ anti-D(*)

T. Aushev

We report a study of the decays B -> D_s1(2536)+ anti-D(*), where anti-D(*) is anti-D0, D- or D*-, using a sample of 657 x 10^6 B anti-B pairs collected at the Upsilon(4S) resonanc…

hep-ex2011★ 52 cited

Evidence for the Suppressed Decay B- -> DK-, D -> K+pi-

Belle Collaboration, Y. Horii, K. Trabelsi +143

The suppressed decay chain B- -> DK-, D -> K+pi-, where D indicates a anti-D0 or D0 state, provides important information on the CP-violating angle phi_3. We measure the ratio R_{D…

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★ 22 cited

Measurements of time-dependent CP asymmetries in decays using a partial reconstruction technique

S. Bahinipati, K. Trabelsi, K. Kinoshita

We report results on time-dependent CP asymmetries in decays based on a data sample containing 657 {\times} pairs collected with the Belle…

hep-ex2011★ 60 cited

Observation of and Evidence for

Jin Li

We report the first observation of and first evidence for , which are CP eigenstate decay modes. These results are obtained from $121.…

hep-ex2011★ 117 cited

Measurement of the decay and determination of

H. Ha, E. Won, I. Adachi +140

We present a measurement of the charmless semileptonic decay using a data sample containing 657 events collected with the Belle detector…

hep-ex2011★ 295 cited

Production of pions, kaons and protons in pp collisions at GeV with ALICE at the LHC

ALICE Collaboration

The production of , , , , p, and pbar at mid-rapidity has been measured in proton-proton collisions at GeV with the ALICE detector. Particle id…

hep-ex2011★ 139 cited

Femtoscopy of pp collisions at =0.9 and 7 TeV at the LHC with two-pion Bose-Einstein correlations

ALICE Collaboration

We report on the high statistics two-pion correlation functions from pp collisions at TeV and =7 TeV, measured by the ALICE experiment at the Large Hadron…