H. Koch

activity

20012019

most citedMeasurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons

728 citations · 7k across the 133 of their papers we have counts for

collaborators

133 papers

hep-ex2019★ 7 cited

Search for rare or forbidden decays of the $D^{0}$ meson

J. P. Lees, V. Poireau, V. Tisserand +234

We present a search for nine lepton-number-violating and three lepton-flavor-violating neutral charm decays of the type $D^{0} \to h^{' -} h^{-} ℓ^{' +} ℓ^{+}$ …

hep-ex2017★ 11 cited

Dalitz plot analyses of $J / ψ \to π^{+} π^{-} π^{0}$ , $J / ψ \to K^{+} K^{-} π^{0}$ , and $J / ψ \to K_{S}^{0} K^{\pm} π^{\mp}$ produced via $e^{+} e^{-}$ annihilation with initial-state radiation

The BaBar Collaboration

We study the processes $e^{+} e^{-} \to γ_{ISR} J / ψ$ where $J / ψ \to π^{+} π^{-} π^{0}$ , $J / ψ \to K^{+} K^{-} π^{0}$ , and $J / ψ \to K_{S}^{0} K^{\pm} π^{\mp}$ using a data sample of 519 $f b^{- 1}$ rec…

hep-ex2016★ 9 cited

Measurement of the B^0 -> D^*- pi^+ pi^- pi^+ branching fraction

The BABAR Collaboration

Using a sample of (470.9 +- 2.8) x 10^6 BB-bar pairs, we measure the decay branching fraction B(B^0 -> D^*- pi^+ pi^- pi^+) = (7.26 +- 0.11 +- 0.31) x 10^-3, where the first uncert…

hep-ex2016★ 64 cited

Search for $B^{+} \to K^{+} τ^{+} τ^{-}$ at the BaBar experiment

The BaBar Collaboration

We search for the rare flavor-changing neutral current process $B^{+} \to K^{+} τ^{+} τ^{-}$ using data from the BABAR experiment. The data sample, collected at the center-of-…

hep-ex2015★ 59 cited

Measurement of Angular Asymmetries in the Decays B->K*l+l-

Babar Collaboration

We study the lepton forward-backward asymmetry AFB and the longitudinal K* polarization FL, as well as an observable P2 derived from them, in the rare decays B->K*l+l-, where l+l-…

hep-ex2015★ 18 cited

Observation of $B \to D^{(*)} π^{+} π^{-} ℓ^{-} ν$ decays in $e^{+} e^{-}$ collisions at the $Υ (4 S)$ resonance

The BABAR Collaboration

We report on measurements of the decays of $B$ mesons into the semileptonic final states $B \to D^{(*)} π^{+} π^{-} ℓ^{-} ν$ , where $D^{(*)}$ represents a…

hep-ex2015★ 3 cited

Search for CP violation In B0-B0bar mixing using partial reconstruction of B0bar -> D*+Xl-nubar and kaon tagging

The BABAR Collaboration

We describe in detail a previously published measurement of CP violation induced by B0-anti B0 oscillations, based on an integrated luminosity of 425.7 fb-1 collected by the BABAR…

hep-ex2014★ 40 cited

Dalitz plot analyses of $B^{0} \to D^{-} D^{0} K^{+}$ and $B^{+} \to D^{0} D^{0} K^{+}$ decays

The BABAR Collaboration, J. P. Lees, others

We present Dalitz plot analyses for the decays of $B$ mesons to $D^{-} D^{0} K^{+}$ and $D^{0} D^{0} K^{+}$ . We report the observation of the $D_{s 1}^{*} (2700)^{+}$ resonance in these…

hep-ex2014★ 3 cited

Search for new $π^{0}$ -like particles produced in association with a $τ$ -lepton pair

The BABAR Collaboration, J. P. Lees, others

We report on a search in $e^{+} e^{-}$ annihilations for new $π^{0}$ -like particles produced in association with a $τ$ -lepton pair. These objects, with a similar mass and similar decay mo…

hep-ex2013★ 11 cited

Measurement of the B+ --> omega l+ nu branching fraction with semileptonically tagged B mesons

The BABAR Collaboration, J. P. Lees, others

We report a measurement of the branching fraction of the exclusive charmless semileptonic decay B+ --> omega l+ nu, where l is either an electron or a muon. We use samples of B+ me…

hep-ex2013★ 82 cited

Measurement of the e+e- --> p anti-p cross section in the energy range from 3.0 to 6.5 GeV

The BABAR Collaboration, J. P. Lees, others

The e+ e- --> p anti-p cross section and the proton magnetic form factor have been measured in the center-of-mass energy range from 3.0 to 6.5 GeV using the initial-state-radiation…

hep-ex2013★ 13 cited

Measurement of the Mass of the D0 Meson

The BABAR Collaboration

We report a measurement of the D0 meson mass using the decay chain D*(2010)+ -> D0 pi+ with D0 -> K- K- K+ pi+. The data were recorded with the BaBar detector at center-of-mass ene…

hep-ex2013★ 39 cited

Measurement of the D(2010)+ meson width and the D(2010)+ - D0 mass difference

The BaBar Collaboration

We measure the mass difference, Δm_0, between the D*(2010)+ and the D0 and the natural line width, Γ, of the transition D*(2010)+ -> D0 pi+. The data were recorded with the BABAR d…

hep-ex2013★ 16 cited

A Search for the Rare Decays B --> pi l+l- and B0 --> eta l+l-

The BABAR Collaboration, J. P. Lees, others

We present the results of a search for the rare flavor-changing neutral-current decays B --> pi l+l- (pi=pi+/-, pi0 and l = e,mu) and B0 --> eta l+l- using a sample of e+e- --> Y(4…

hep-ex2013★ 728 cited

Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons

The BABAR Collaboration, J. P. Lees, others

Based on the full BaBar data sample, we report improved measurements of the ratios R(D(*)) = B(B -> D(*) Tau Nu)/B(B -> D(*) l Nu), where l is either e or mu. These ratios are sens…

hep-ex2012★ 11 cited

The branching fraction of tau --> pi- K0S K0S (pi0) nu decays

J. P. Lees

We present a study of tau- --> pi- K0S K0S (pi0) nu and tau- --> K- K0S K0S (pi0) nu decays using a dataset of 430 million tau lepton pairs, corresponding to an integrated luminosi…

hep-ex2012★ 11 cited

Search for resonances decaying to eta_c pi+ pi- in two-photon interactions

The BABAR Collaboration, J. P. Lees, others

We report a study of the process gamma gamma -> X -> eta_c pi+ pi-, where X stands for one of the resonances chi_{c2}(1P), eta_c(2S), X(3872), X(3915), or chi_{c2}(2P). The analysi…

hep-ex2011★ 62 cited

Search for hadronic decays of a light Higgs boson in the radiative decay Upsilon --> gamma A0

The BABAR Collaboration, J. P. Lees, V. Poireau +385

We search for hadronic decays of a light Higgs boson (A0) produced in radiative decays of an Upsilon(2S) or Upsilon(3S) meson, Upsilon --> gamma A0. The data have been recorded by…

hep-ex2011★ 74 cited

Searches for Rare or Forbidden Semileptonic Charm Decays

The BABAR Collaboration, J. P. Lees

We present searches for rare or forbidden charm decays of the form $X_{c}^{+} \to h^{\pm} ℓ^{\mp} ℓ^{(') +}$ , where $X_{c}^{+}$ is a charm hadron ( $D^{+}$ , $D_{s}^{+}$ , or $Λ_{c}^{+}$ ), $h^{\pm}$ i…

hep-ex2011★ 57 cited

Search for the rare decays Bs -->mumu and Bd -->mumu

LHCb Collaboration, R. Aaij, B. Adeva +542

A search for the decays Bs-->mumu and Bd-->mumu is performed with about 37 pb^{-1} of pp collisions at sqrt{s} = 7 TeV collected by the LHCb experiment at the Large Hadron Collider…

hep-ex2010★ 11 cited

Measurements of branching fractions, polarizations, and direct CP-violation asymmetries in B+ -> rho0 K+ and B+ -> f0(980)K+ decays

P. del Amo Sanchez

We present measurements of the branching fractions, longitudinal polarization, and direct CP-violation asymmetries for the decays B+ -> rho0 K*+ and B+ -> f0(980) K*+ with a sample…

hep-ex2010★ 2 cited

Correlated leading baryon-antibaryon production in e+e- --> ccbar --> Lambda_c+ antiLambda_c- X

The BABAR Collaboration, B. Aubert

We present a study of 649 \pm 35 e+e- --> ccbar events produced at sqrt{s}~10.6 GeV containing both a Lambda_c baryon and a Lambda_c antibaryon. The number observed is roughly four…

hep-ex2010★ 14 cited

Study of B -> X gamma Decays and Determination of |V_td/V_ts|

The BABAR Collaboration, P. del Amo Sanchez

Using a sample of 471 million BBbar events collected with the BaBar detector, we study the sum of seven exclusive final states B->X_s(d) gamma, where X_s(d) is a strange (non-stran…

hep-ex2010★ 76 cited

Evidence for direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle gamma with B-+ --> D() K()-+ decays

The BABAR Collaboration, P. del Amo Sanchez

We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle $γ$ through a Dalitz plot analysis of neutral $D$ meson decays to $K_{S}^{0} π^{+} π^{-}$ and $K_{S}^{0} K^{+} K^{-}$ …

Search for rare or forbidden decays of the D0 meson

Dalitz plot analyses of J/ψ→π+π−π0, J/ψ→K+K−π0, and J/ψ→KS0​K±π∓ produced via e+e− annihilation with initial-state radiation

Measurement of the B^0 -> D^*- pi^+ pi^- pi^+ branching fraction

Search for B+→K+τ+τ− at the BaBar experiment

Measurement of Angular Asymmetries in the Decays B->K*l+l-

Observation of B→D(∗)π+π−ℓ−ν decays in e+e− collisions at the Υ(4S) resonance

Search for CP violation In B0-B0bar mixing using partial reconstruction of B0bar -> D*+Xl-nubar and kaon tagging

Dalitz plot analyses of B0→D−D0K+ and B+→D0D0K+ decays

Search for new π0-like particles produced in association with a τ-lepton pair

Measurement of the B+ --> omega l+ nu branching fraction with semileptonically tagged B mesons

Measurement of the e+e- --> p anti-p cross section in the energy range from 3.0 to 6.5 GeV

Measurement of the Mass of the D0 Meson

Measurement of the D*(2010)+ meson width and the D*(2010)+ - D0 mass difference

A Search for the Rare Decays B --> pi l+l- and B0 --> eta l+l-

Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons

The branching fraction of tau --> pi- K0S K0S (pi0) nu decays

Search for resonances decaying to eta_c pi+ pi- in two-photon interactions

Search for hadronic decays of a light Higgs boson in the radiative decay Upsilon --> gamma A0

Searches for Rare or Forbidden Semileptonic Charm Decays

Search for the rare decays Bs -->mumu and Bd -->mumu

Measurements of branching fractions, polarizations, and direct CP-violation asymmetries in B+ -> rho0 K*+ and B+ -> f0(980)K*+ decays

Correlated leading baryon-antibaryon production in e+e- --> ccbar --> Lambda_c+ antiLambda_c- X

Study of B -> X gamma Decays and Determination of |V_td/V_ts|

Evidence for direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle gamma with B-+ --> D(*) K(*)-+ decays

Search for rare or forbidden decays of the $D^{0}$ meson

Dalitz plot analyses of $J / ψ \to π^{+} π^{-} π^{0}$ , $J / ψ \to K^{+} K^{-} π^{0}$ , and $J / ψ \to K_{S}^{0} K^{\pm} π^{\mp}$ produced via $e^{+} e^{-}$ annihilation with initial-state radiation

Search for $B^{+} \to K^{+} τ^{+} τ^{-}$ at the BaBar experiment

Observation of $B \to D^{(*)} π^{+} π^{-} ℓ^{-} ν$ decays in $e^{+} e^{-}$ collisions at the $Υ (4 S)$ resonance

Dalitz plot analyses of $B^{0} \to D^{-} D^{0} K^{+}$ and $B^{+} \to D^{0} D^{0} K^{+}$ decays

Search for new $π^{0}$ -like particles produced in association with a $τ$ -lepton pair

Measurement of the D(2010)+ meson width and the D(2010)+ - D0 mass difference

Measurements of branching fractions, polarizations, and direct CP-violation asymmetries in B+ -> rho0 K+ and B+ -> f0(980)K+ decays

Evidence for direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle gamma with B-+ --> D() K()-+ decays