Université de Montréal

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Showing 2009 · hep-exShow all

33 papers · 2 filters

hep-ex2009★ 81 cited

A Search for B+ -> tau+ nu Recoiling Against B- -> D0 l- nu X

The BABAR Collaboration, B. Aubert

We present a search for the decay $B^{+} \to ℓ^{+} ν_{ℓ}$ ( $ℓ = e, μτ$ ) in $(458.9 \pm 5.1) \times 1 0^{6}$ $B B ˉ$ pairs recorded with the BABAR detector at the PEP-II B-Facto…

hep-ex2009★ 7 cited

Observation of inclusive $D^{*\pm}$ production in the decay of $Υ (1 S)$

The BABAR Collaboration, B. Aubert

We present a study of the inclusive $D^{*\pm}$ production in the decay of $Υ (1 S)$ using $(98.6 \pm 0.9) \times 1 0^{6}$ $Υ (2 S)$ mesons collected with the BaBar detector at the $Υ (2 S)$ …

hep-ex2009★ 4 cited

Sigma-antihyperon correlations in Z0 decay and investigation of the baryon production mechanism

The OPAL Collaboration

Data collected around sqrt{s}=91 GeV by the OPAL experiment at the LEP e+e- collider are used to study the mechanism of baryon formation. As the signature, the fraction of Sigma-hy…

hep-ex2009★ 14 cited

Measurement of CP violation observables and parameters for the decays $B^{\pm} \to D K^{*\pm}$

The BaBar Collaboration, B. Aubert

We study the decay $B^{-} \to D K^{*-}$ using a sample of 379 $\times 1 0^{6}$ $Υ (4 S) \to B B ˉ$ events collected with the BABAR detector at the PEP-II $B$ -factory. We perform a "GLW" an…

hep-ex2009★ 41 cited

Measurements of the $τ$ Mass and Mass Difference of the $τ^{+}$ and $τ^{-}$ } at BaBar

The BaBar Collaboration, B. Aubert

We present the result from a precision measurement of the mass of the $τ$ lepton, $M_{τ}$ , based on $423 f b^{- 1}$ of data recorded at the $Υ (4 S)$ resonance with the BaBar detector. U…

hep-ex2009★ 21 cited

Measurement of branching fractions of B decays to K1(1270)pi and K1(1400)pi and determination of the CKM angle alpha from B0 --> a1(1260)+/- pi-/+

The BABAR Collaboration, B. Aubert

We report measurements of the branching fractions of neutral and charged B meson decays to final states containing a K_1(1270) or K_1(1400) meson and a charged pion. The data, coll…

hep-ex2009★ 287 cited

Precise measurement of the e+ e- to pi+ pi- (gamma) cross section with the Initial State Radiation method at BABAR

The BABAR Collaboration, B. Aubert

A precise measurement of the cross section of the process e+ e- to pi+ pi- (gamma) from threshold to an energy of 3 GeV is obtained with the initial state radiation (ISR) method us…

hep-ex2009★ 63 cited

A Search for Invisible Decays of the Upsilon(1S)

The BABAR Collaboration, B. Aubert

We search for invisible decays of the Upsilon(1S) meson using a sample of 91.4 x 10^{6} Upsilon(3S) mesons collected at the BaBar/PEP-II B-factory. We select events containing the…

hep-ex2009★ 48 cited

Measurement of D0-D0bar Mixing using the Ratio of Lifetimes for the Decays D0->K-pi+ and K+K-

The BABAR Collaboration, B. Aubert

We measure the rate of D0-D0bar mixing with the observable yCP=(tauKpi/tauKK)-1, where tauKK and tauKpi are respectively the mean lifetimes of CP-even D0->K+K- and CP-mixed D0->K-p…

hep-ex2009★ 41 cited

Measurement and interpretation of moments in inclusive semileptonic decays Bbar --> X_c l- nubar

The BABAR Collaboration, B. Aubert

We present results for the moments of observed spectra in inclusive semileptonic B-meson decays to charm hadrons Bbar --> X_c l- nubar. Moments of the hadronic-mass and the combine…

hep-ex2009★ 19 cited

Decay of negative muons bound in $^{27}$ Al

A. Grossheim, R. Bayes, J. F. Bueno +25

We present the first measurement of the energy spectrum up to 70 MeV of electrons from the decay of negative muons after they become bound in $^{27}$ Al atoms. The data were taken w…

hep-ex2009★ 635 cited

Searches for Lepton Flavor Violation in the Decays tau -> e gamma and tau -> mu gamma

The BABAR Collaboration, B. Aubert

Searches for lepton-flavor-violating decay of a tau lepton to a lighter mass lepton and a photon have been performed with the entire dataset of (963 +- 7) x 10^6 tau decays collect…

hep-ex2009★ 112 cited

Study of $D_{s J}$ decays to $D^{*} K$ in inclusive $e^{+} e^{-}$ interactions

The BABAR Collaboration, B. Aubert

We observe the decays D^*_{s1}(2710)^+ \to D^*K $an d$ D^*_{sJ}(2860)^+ \to D^*K $an d m e a s u r e t h e i r b r an c hin g f r a c t i o n sr e l a t i v e t o t h e$ D K$ final state. We also observe, in the…

hep-ex2009★ 8 cited

Search for B-meson decays to b1rho and b1K*

The BABAR Collaboration, B. Aubert

We present a search for decays of $B$ mesons to final states with a $b_1$ meson and a $ρ$ or $K^{*} (892)$ meson. The search is based on a data sample consisting of 465 million $B\ke…

hep-ex2009★ 9 cited

Observation and Polarization Measurement of B0 --> a1(1260)+ a1(1260)- Decay

The BABAR Collaboration, B. Aubert

We present measurements of the branching fraction B and the longitudinal polarization fraction fL for B0 -> a1(1260)+ a1(1260)- decays, with a1(1260)+/- -> π- π+ π+/-. The data sam…

hep-ex2009★ 6 cited

Observation of the baryonic B-decay B0bar -> Lambda_c^+ antiproton K^- pi^+

The BABAR Collaboration, B. Aubert

We report the observation of the baryonic B-decay B0bar -> Lambda_c^+ antiproton K^- pi^+, excluding contributions from the decay B0bar -> Lambda_c^+ anti-Lambda K^-. Using a data…

hep-ex2009★ 24 cited

B meson decays to charmless meson pairs containing eta or eta' mesons

The BABAR Collaboration, B. Aubert

We present updated measurements of the branching fractions for B0 meson decays to etaK0, etaeta, etaphi, etaomega, eta'K0, eta'eta', eta'phi, and eta'omega, and branching fractions…

hep-ex2009★ 21 cited

Model-independent search for the decay B -> l nu gamma

The BABAR Collaboration, B. Aubert

We present a search for the radiative leptonic decay B+ -> l+ nu gamma, where l=e,mu, using a data sample of 465 million B-meson pairs collected by the BABAR experiment. In this an…

hep-ex2009★ 156 cited

Dark Matter Spin-Dependent Limits for WIMP Interactions on 19-F by PICASSO

S. Archambault, F. Aubin, M. Auger +29

The PICASSO experiment at SNOLAB reports new results for spin-dependent WIMP interactions on $^{19}$ F using the superheated droplet technique. A new generation of detectors and new…

hep-ex2009★ 37 cited

Measurement of Branching Fractions and CP and Isospin Asymmetries in B -> K*(892) gamma Decays

The BABAR Collaboration, B. Aubert

We present an analysis of the decays B0 -> K*0 gamma and B+ -> K*+ gamma using a sample of 383 million BBbar events collected with the BaBar detector at the PEP2 asymmetric energy…

hep-ex2009★ 63 cited

Search for a low-mass Higgs boson in Y(3S)-->gamma A^0, A^0-->tau^+tau^- at BABAR

The BABAR Collaboration, B. Aubert

We search for a light Higgs boson, $A^{0}$ , in the radiative decay $Υ (3 S) \to γ A^{0}$ , $A^{0} \to τ^{+} τ^{-}$ , $τ^{+} \to e^{+} ν_{e} ν ˉ_{τ}$ or $τ^{+} \to μ^{+} ν_{μ} ν ˉ_{τ}$ . The data sample contains 122 m…

hep-ex2009★ 199 cited

Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions Upsilon -> gamma A0

The BABAR Collaboration, B. Aubert

We search for evidence of a light scalar boson in the radiative decays of the Upsilon(2S) and Upsilon(3S) resonances: Upsilon(2S,3S)-> gamma A0, A0 -> mu^+ mu^-. Such a particle ap…

hep-ex2009★ 63 cited

Time-dependent amplitude analysis of B0 --> K0S pi+ pi-

The BABAR Collaboration, B. Aubert

We perform a time-dependent amplitude analysis of $B^{0} \to K_{S}^{0} π^{+} π^{-}$ decays to extract the CP violation parameters of $f_{0} (980) K_{S}^{0}$ and $ρ^{0} (770) K_{S}^{0}$ and the direct CP asy…

hep-ex2009★ 93 cited

Measurement of |V_cb| and the Form-Factor Slope in Bbar -> D l- nubar Decays in Events Tagged by a Fully Reconstructed B Meson

The BABAR Collaboration, B. Aubert

We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |V_cb| and the form-factor slope rho^2 in Bbar -> Dl- nubar decays based on 460 million BBar events recorde…

A Search for B+ -> tau+ nu Recoiling Against B- -> D0 l- nu X

Observation of inclusive D∗± production in the decay of Υ(1S)

Sigma-antihyperon correlations in Z0 decay and investigation of the baryon production mechanism

Measurement of CP violation observables and parameters for the decays B±→DK∗±

Measurements of the τ Mass and Mass Difference of the τ+ and τ−} at BaBar

Measurement of branching fractions of B decays to K1(1270)pi and K1(1400)pi and determination of the CKM angle alpha from B0 --> a1(1260)+/- pi-/+

Precise measurement of the e+ e- to pi+ pi- (gamma) cross section with the Initial State Radiation method at BABAR

A Search for Invisible Decays of the Upsilon(1S)

Measurement of D0-D0bar Mixing using the Ratio of Lifetimes for the Decays D0->K-pi+ and K+K-

Measurement and interpretation of moments in inclusive semileptonic decays Bbar --> X_c l- nubar

Decay of negative muons bound in 27Al

Searches for Lepton Flavor Violation in the Decays tau -> e gamma and tau -> mu gamma

Study of DsJ​ decays to D∗K in inclusive e+e− interactions

Search for B-meson decays to b1rho and b1K*

Observation and Polarization Measurement of B0 --> a1(1260)+ a1(1260)- Decay

Observation of the baryonic B-decay B0bar -> Lambda_c^+ antiproton K^- pi^+

B meson decays to charmless meson pairs containing eta or eta' mesons

Model-independent search for the decay B -> l nu gamma

Dark Matter Spin-Dependent Limits for WIMP Interactions on 19-F by PICASSO

Measurement of Branching Fractions and CP and Isospin Asymmetries in B -> K*(892) gamma Decays

Search for a low-mass Higgs boson in Y(3S)-->gamma A^0, A^0-->tau^+tau^- at BABAR

Search for Dimuon Decays of a Light Scalar Boson in Radiative Transitions Upsilon -> gamma A0

Time-dependent amplitude analysis of B0 --> K0S pi+ pi-

Measurement of |V_cb| and the Form-Factor Slope in Bbar -> D l- nubar Decays in Events Tagged by a Fully Reconstructed B Meson

Observation of inclusive $D^{*\pm}$ production in the decay of $Υ (1 S)$

Measurement of CP violation observables and parameters for the decays $B^{\pm} \to D K^{*\pm}$

Measurements of the $τ$ Mass and Mass Difference of the $τ^{+}$ and $τ^{-}$ } at BaBar

Decay of negative muons bound in $^{27}$ Al

Study of $D_{s J}$ decays to $D^{*} K$ in inclusive $e^{+} e^{-}$ interactions