W. R. Innes

Study of the process e+e−→π+π−π0 using initial state radiation with BABAR

J. P. Lees, V. Poireau, V. Tisserand, E. Graugés et autres

The process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}\ensuremath{\gamma}$ is studied at a center-of-mass energy near the $\mathrm{\ensuremath{\Upsilon}}(4S)$ resonance using a data sample of $469\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected with the BABAR detector at the PEP-II collider. We have performed a precise measurement of the ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ cross section in …

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Time-dependent analysis of B0→KS0π−π+γ decays and studies of the K+π−π+ system in B+→K+π−π+γ decays

P. del Amo Sanchez, J. P. Lees, V. Poireau, V. Tisserand et autres

We measure the time-dependent $CP$ asymmetry in the radiative-penguin decay ${B}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}\ensuremath{\gamma}$, using a sample of $471\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\mathrm{\ensuremath{\Upsilon}}(4S)\ensuremath{\rightarrow}B\overline{B}$ events recorded with the BABAR detector at the PEP-II ${e}^{+}{e}^{\ensuremath{-}}$ storage ring at SLAC. Using events with ${m}_{K\ensuremath{\pi}\ensuremath{\pi}}<1.8\text{ }\text{ }\mathrm{GeV}/{c}^{2}$, we measure the branching fractions …

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Measurement of the I=1/2 Kπ S -wave amplitude from Dalitz plot analyses of ηc→KK¯π in two-photon interactions

J. P. Lees, V. Poireau, V. Tisserand, E. Graugés et autres

We study the processes $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}{K}_{S}^{0}{K}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}$ and $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ using a data sample of $519\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider at center-of-mass energies at and near the $\mathrm{\ensuremath{\Upsilon}}(nS)$ ($n=2$, 3, 4) resonances. We observe …

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Measurement of Collins asymmetries in inclusive production of charged pion pairs in e+e− annihilation atBABAR

J. P. Lees, V. Poireau, V. Tisserand, E. Graugés et autres

We present measurements of Collins asymmetries in the inclusive process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\pi}\ensuremath{\pi}X$, where $\ensuremath{\pi}$ stands for charged pions, at a center-of-mass energy of 10.6 GeV. We use a data sample of $468\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the BABAR experiment at the PEP-II $B$ …

fr, es, it, no, us, de, ca, gb, ru, in (code pays fourni par la source)

Search for B+→D+K0 and B+→D+K*0 decays

P. del Amo Sanchez, J. P. Lees, V. Poireau, E. Prencipe et autres

11 pages, 3 figures, to be submitted to Phys. Rev. D

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Observation of the χc2(2P) meson in the reaction γγ→DD¯ atBABAR

B. Aubert, Y. Karyotakis, J. P. Lees, V. Poireau et autres

A search for the $Z(3930)$ resonance in $\ensuremath{\gamma}\ensuremath{\gamma}$ production of the $D\overline{D}$ system has been performed using a data sample corresponding to an integrated luminosity of $384\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The $D\overline{D}$ …

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Measurement of the γγ*→π0 transition form factor

B. Aubert, Y. Karyotakis, J. P. Lees, V. Poireau et autres

We study the reaction ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ in the single tag mode and measure the differential cross section $d\ensuremath{\sigma}/d{Q}^{2}$ and the $\ensuremath{\gamma}{\ensuremath{\gamma}}^{*}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}$ transition form factor in the momentum transfer range from 4 to $40\text{ }\text{ }{\mathrm{GeV}}^{2}$. At ${Q}^{2}>10\text{ }\text{ }{\mathrm{GeV}}^{2}$ the measured form factor …

Improved Limits on Lepton-Flavor-Violating τ Decays to ℓϕ , ℓρ , ℓK* , and ℓK¯*

B. Aubert, Y. Karyotakis, J. P. Lees, V. Poireau et autres

We search for the neutrinoless, lepton-flavor-violating tau decays ${\ensuremath{\tau}}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\ell}}^{\ensuremath{-}}{V}^{0}$, where $\ensuremath{\ell}$ is an electron or muon and ${V}^{0}$ is a vector meson reconstructed as $\ensuremath{\phi}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}$, $\ensuremath{\rho}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, ${K}^{*}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$, ${\overline{K}}^{*}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$. The analysis has been performed using $451\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data collected at an …

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Measurement of the branching fraction and Λ¯ polarization in B0→Λ¯pπ−

B. Aubert, Y. Karyotakis, J. P. Lees, V. Poireau et autres

We present a measurement of the ${B}^{0}\ensuremath{\rightarrow}\overline{\ensuremath{\Lambda}}p{\ensuremath{\pi}}^{\ensuremath{-}}$ branching fraction performed using the BABAR detector at the PEP-II asymmetric ${e}^{+}{e}^{\ensuremath{-}}$ collider. Based on a sample of $467\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs we measure $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}\overline{\ensuremath{\Lambda}}p{\ensuremath{\pi}}^{\ensuremath{-}})=[3.07\ifmmode\pm\else\textpm\fi{}0.31\text{ }(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.23\text{ }(\mathrm{syst})]\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$. The measured differential spectrum as a function of the …

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Dalitz plot analysis of B−→D+π−π−

B. Aubert, M. Bóna, Y. Karyotakis, J. P. Lees et autres

We report on a Dalitz plot analysis of ${B}^{\ensuremath{-}}\ensuremath{\rightarrow}{D}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ensuremath{-}}$ decays, based on a sample of about $383\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\Upsilon}(4\mathrm{S})\ensuremath{\rightarrow}B\overline{B}$ decays collected with the BABAR detector at the PEP-II asymmetric-energy $B$ Factory at SLAC. We find the total branching fraction of the three-body decay: …

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Direct CP , Lepton Flavor, and Isospin Asymmetries in the Decays B→K(*)l+l−

B. Aubert, M. Bóna, Y. Karyotakis, J. P. Lees et autres

We measure branching fractions and integrated rate asymmetries for the rare decays $B\ensuremath{\rightarrow}{K}^{(*)}{l}^{+}{l}^{\ensuremath{-}}$, where ${l}^{+}{l}^{\ensuremath{-}}$ is either ${e}^{+}{e}^{\ensuremath{-}}$ or ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$, using a sample of $384\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ events collected with the BABAR detector at the PEP-II ${e}^{+}{e}^{\ensuremath{-}}$ collider. We find no evidence for …

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Measurement of the Branching Fractions of B ¯ → D ** ℓ − ν ¯ ℓ Decays in Events Tagged by a Fully Reconstructed B Meson

B. Aubert, M. Bóna, Y. Karyotakis, J. P. Lees et autres

We report a measurement of the branching fractions of $\overline{B}\ensuremath{\rightarrow}{D}^{**}{\ensuremath{\ell}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\ell}}$ decays based on $417\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data collected at the $\mathit{\ensuremath{\Upsilon}}(4S)$ resonance with the BABAR detector at the PEP-II ${e}^{+}{e}^{\ensuremath{-}}$ storage rings. Events are selected by fully reconstructing one of the …

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