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in creator/contributor: "Barate, R."

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B Meson Decays to mega K*, omega rho, omega omega, omega phi, and omega f0

The authors describe searches for B meson decays to the charmless vector-vector final states {omega}K*, {omega}p, {omega}{omega}, and {omega}{phi} with 233 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation at {radical}s = 10.58 GeV. They also search for the vector-scalar B decay to {omega}f{sub 0}.

Date: July 28, 2006

Creator: Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Measurement of Branching Fractions and CP-ViolatingCharge Asymmetries for B Meson Decays to D()D(), and Implications for the CKMAngle gamma

In summary, the authors have measured branching fractions, upper limits, and charge asymmetries for all B meson decays to D{sup (*)} {bar D}{sup (*)}.

Date: July 6, 2006

Creator: Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Measurement of the Branching Fractions for the Decays B+ tp rho+ gamma, B0 to rho0 gamma, and B0 to omega gamma

No Description Available.

Date: May 23, 2007

Creator: Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Measurement of the Branching Fractions of the Decays \bar{B}^0 to Lambda_c^+ \bar{p} and B^- to Lambda_c^+ \bar{p} pi^-

The authors present studies of two-body and three-body charmed baryonic B decays in a sample of 232 million B{bar B} pairs collected with the BABAR detector at the PEP-II e{sup +}e{sup -} storage ring. The branching fractions of the decays {bar B}{sup 0} {yields} {Lambda}{sub c}{sup +}{bar p} and B{sup -} {yields} {Lambda}{sub c}{sup +} {bar p}{pi}{sup -} are measured to be (2.15 {+-} 0.36 {+-} 0.13 {+-} 0.56) x 10{sup -5} and (3.53 {+-} 0.18 {+-} 0.31 {+-} 0.92) x 10{sup -4}, respectively. The… more

Date: December 6, 2006

Creator: Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Observation of a Broad Structure at an Invariant Massof 4.32 GeV in the Reaction e+e- to pi+pi-psi(2S) Measured at BaBar

The authors measure the cross section for the process e{sup +}e{sup -} {yields} {pi}{sup +}{pi}{sup -}{psi}(2S) from threshold up to 8 GeV center-of-mass energy using events containing initial-state radiation, produced at the PEP-II e{sup +}e{sup -} storage rings. The study is based on 298 fb{sup -1} of data recorded with the BABAR detector. A structure is observed in the cross-section not far above threshold, near 4.32 GeV. This structure is not compatible with the Y(4260) previously reported … more

Date: October 31, 2006

Creator: Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Search for B+ ->phi pi+ and B0->phi pi0 Decays

A search has been made for the decays B{sup +} {yields} {psi}{pi}{sup +} and B{sup 0} in a data sample of approximately 232 x 10{sup 6} B{bar B} pairs recorded at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II B-meson Factory at SLAC. No significant signals have been observed, and therefore upper limits have been set on the branching fractions: {Beta}(B{sup +} {yields} {psi}{pi}{sup +}) < 2.4 x 10{sup -7} and {Beta}(B{sup 0} {yields} {psi}{pi}{sup 0}) < 2.8 x 10{sup -7}… more

Date: May 24, 2006

Creator: Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Search for b to u transitions in B- to [K+pi-pi0]_D K-

The authors search for decays of a B meson into a neutral D meson and a kaon, with the D meson decaying into K{sup +}{pi}{sup -}{pi}{sup 0}. This final state can be reached through the b {yields} c transition B{sup -} {yields} D{sup 0}K{sup -} followed by the doubly Cabibbo-suppressed D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0}, or the b {yields} u transition B{sup -} {yields} {bar D}{sup 0}K{sup -} followed by the Cabibbo-favored {bar D}{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0}. The… more

Date: December 6, 2006

Creator: Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Search for Charmonium States Decaying to J/\psi\gamma \gamma $ Using Initial-State Radiation Events

We study the processes e{sup +}e{sup -} {yields} (J/{psi}{gamma}{gamma}){gamma} and e{sup +}e{sup -} {yields} (J/{psi}{pi}{sup -}{pi}{sup +}){gamma} where the hard photon radiated from an initial e{sup +}e{sup -} collision with center-of-mass (CM) energy near 10.58 GeV is detected. In the final state J/{psi}{gamma}{gamma} we consider J/{psi}{pi}{sup 0}, J/{psi}{eta}, {chi}{sub c1}{gamma}, and {chi}c{sub 2}{gamma} candidates. The invariant mass of the hadronic final state defines the effective e… more

Date: November 30, 2006

Creator: Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Study of B -> D^()D_s(J)^() Decays andMeasurement of D_s^- and D_s(J)(2460)- Branching Fractions

We present branching fraction measurements of twelve B meson decays of the form B {yields} D{sup (*)} D{sub s(J)}{sup (*)}. The results are based on {Upsilon}(4S) decays in B{bar B} pairs. One of the B mesons is fully reconstructed and the other decays to two charm mesons, of which one is reconstructed, and the mass and momentum of the other is inferred by kinematics. Combining these results with previous exclusive branching fraction measurements, we determine {Beta}(D{sub s}{sup -} {yields} {p… more

Date: May 16, 2006

Creator: Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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An Amplitude Analysis of the Decay B+- -> pi+- pi+- pi-+

The authors present a Dalitz-plot analysis of charmless B{sup {+-}} decays to the final state {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}} using 210 fb{sup -1} of data recorded by the BABAR experiment at {radical}s = 10.58 GeV. We measure the branching fractions {Beta}(B{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}}) = (16.2 {+-} 1.2 {+-} 0.9) x 10{sup -6} and {Beta}(B{sup {+-}} {yields} {rho}{sup 0}(770){pi}{sup {+-}}) = (8.8 {+-} 1.0 {+-} 0.6{sub -0.7}{sup +0.1}) x 10{sup -6}. M… more

Date: July 11, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Branching Fraction for B+ -> pi0 l+ nu, Measured in Upsilon (4S) -> BBbar Events Tagged by B- -> D0 l- nubar (X) Decays

We report a preliminary branching fraction of (1.80 {+-} 0.37{sub stat.} {+-} 0.23{sub syst.}) x 10{sup -4} for the charmless exclusive semileptonic B{sup +} {yields} {pi}{sup 0}{ell}{sup +}{nu} decay, where {ell} can be either a muon or an electron. This result is based on data corresponding to an integrated luminosity of 81 fb{sup -1} collected at the {Upsilon}(4S) resonance with the BABAR detector. The analysis uses B{bar B} events that are tagged by a B meson reconstructed in the semilepton… more

Date: June 29, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Branching Fraction for B0 -> pi- l+ nu and Determination of |Vub| in Upsilon(4S) -> B0 B0bar Events Tagged by B0bar -> D(*)+ l- nubar

We report preliminary results from a study of the charmless exclusive semileptonic decay B{sup 0} {yields} {pi}{sup -}{ell}{sup +}{nu} based on the data collected at the {Upsilon}(4S) resonance using the BABAR detector at SLAC. The analysis uses events in which the signal B meson recoils against a B meson that has been reconstructed in a semileptonic decay {bar B}{sup 0} {yields} D{sup (*)+}{ell}{sup -}{bar {nu}}. We extract the total branching fraction {Beta}(B{sup 0} {yields} {pi}{sup -}{ell}… more

Date: June 29, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Dalitz Plot Analysis of D0 to K0K+ K-

A Dalitz plot analysis of approximately 12,500 D{sup 0} events reconstructed in the hadronic decay D{sup 0} {yields} {bar K}{sup 0} K{sup +}K{sup -} is presented. This analysis is based on a data sample of 91.5 fb{sup -1} collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} storage rings at SLAC running at center-of-mass energies on and 40 MeV below the {Upsilon}(4S) resonance. The events are selected from e{sup +}e{sup -} {yields} c{bar c} annihilations using the … more

Date: July 12, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Dalitz-Plot Analysis of the Decays B+/- -> K+/- pi-/+ pi+/-

We report a Dalitz-plot analysis of the charmless hadronic decays of charged B mesons to the state K{sup {+-}} {pi}{sup {-+}}{pi}{sup {+-}}. Using a sample of 226.0 {+-} 2.5 million B{bar B}pairs collected by the BABAR detector, measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes both charge conjugate decays. We present measurements of the corresponding branching and their charge asymmetries that supersede those of previous BABAR analyses. We find the asymm… more

Date: October 4, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Dalitz Plot Study of B0 to K+K-K0s Decays

We present a study of the dynamics in B{sup 0} {yields} K{sup +}K{sup -}K{sub S}{sup 0} decays with approximately 230 million B{bar B} events collected by the BABAR detector at SLAC. They find that the Dalitz plot distribution is best parameterized with the {phi}K{sub S}{sup 0} mode, an S-wave K{sup +}K{sup -} resonance near 1500 MeV/c{sup 2}, and a large non-resonant contribution. We set limits on resonances not included in the model, and study models for the non-resonant contribution.

Date: July 27, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Determination of |Vub| from Measurementsof the Electron and Neutrino Momenta inInclusive Semileptonic B Decays

No Description Available.

Date: June 22, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Evidence for B+ to K0barK+ and B0 to K0K0bar, and Measurement of the Branching Fraction and Search for Direct CP Violation in B+ to K0pi+

The authors present evidence for the b {yields} d penguin-dominated decays B{sup +} {yields} {bar K}{sup 0}K{sup +} and B{sup 0} {yields} K{sup 0}{bar K}{sup 0} with significances of 3.5 and 4.5 standard deviations, respectively. The results are based on a sample of 227 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at SLAC. We measure the branching fractions {Beta}(B{sup +} {yields} {bar K}{sup 0}K{sup … more

Date: July 12, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Improved Measurements of Branching Fractions for B0 -> pi+pi-, K+pi-, and Search for B0 -> K+K-

We present preliminary measurements of branching fractions for the charmless two-body decays B{sup 0} {yields} {pi}{sup +}{pi}{sup -} and K{sup +}{pi}{sup -}, and a search for B{sup 0} {yields} K{sup +}K{sup -} using a data sample of approximately 227 million B{bar B} decays. Signal yields are extracted with a multi-dimensional maximum likelihood fit, and the efficiency is corrected for the effects of final-state radiation. We find the charge-averaged branching fractions (in units of 10{sup -6}… more

Date: September 28, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Improved Measurements of Neutral B Decay Branching Fractions to K0s pi+ pi- and the Charge Asymmetry of B0 -> K*+ pi-

The authors analyze the decay B{sup 0} {yields} K{sub S}{sup 0}{pi}{sup +}{pi}{sup -} using a sample of 232 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. A maximum likelihood fit finds the following branching fractions: {Beta}(B{sup 0} {yields} K{sup 0}{pi}{sup +}{pi}{sup -}) = (43.0 {+-} 2.3 {+-} 2.3) x 10{sup -6}, {Beta}(B{sup 0} {yields} f{sub 0}({yields} {pi}{sup +}{pi}{sup -})K{sup 0}) = (5.5 {+-} 0.7 {+-} 0… more

Date: August 26, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of Branching Fraction and CP-Violating Asymmetry for B-> omega K0s

The authors present a preliminary measurement of the branching fraction and CP-violating parameters S and C for the decay B{sup 0} {yields} {omega}K{sub S}{sup 0}. The data sample corresponds to 232 x 10{sup 6} B{bar B} pairs produced from e{sup +}e{sup -} annihilation at the {Upsilon}(4S) resonance. They measure {Beta}(B{sup 0} {yields} {omega}K{sup 0}) = (5.9 {+-} 1.0 {+-} 0.4) x 10{sup -6}, S = 0.50{sub -0.38}{sup +0.34} {+-} 0.02 and C = -0.56{sub -0.27}{sup +0.29} {+-} 0.03.

Date: June 8, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Measurement of Branching Fractions and Mass Spectra of B to K pi pi gamma

The authors present a measurement of the partial branching fractions and mass spectra of the exclusive radiative penguin processes B {yields} K{pi}{pi}{gamma} in the range m{sub K{pi}{pi}} < 1.8 GeV/c{sup 2}. They reconstruct four final states: K{sup +}{pi}{sup -}{pi}{sup +}{gamma}, K{sup +}{pi}{sup -}{pi}{sup 0}{gamma}, K{sub S}{sup 0}{pi}{sup -}{pi}{sup +}{gamma}, and K{sub S}{sup 0}{pi}{sup +}{pi}{sup 0}{gamma}, where K{sub S}{sup 0} {yields} {pi}{sup +}{pi}{sup -}. Using 232 million e{su… more

Date: July 12, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of Branching Fractions and Resonance Contributions for B0 -> D0bar K+ pi- and Search for B0 -> D0 K+ pi- Decays

Using 226 million {Upsilon}(4S) {yields} B{bar B} events collected with the BABAR detector at the PEp-II e{sup +}e{sup -} storage ring at the Stanford Linear Accelerator Center, they measure the branching fraction for B{sup 0} {yields} {bar D}{sup 0}K{sup +}{pi}{sup -}, excluding B{sup 0} {yields} D*{sup -}K{sup +}, to be {Beta}(B{sup 0} {yields} {bar D}{sup 0}K{sup +}{pi}{sup -}) = 88 {+-} 15 {+-} 9 x 10{sup -6}. They observe B{sup 0} {yields} {bar D}{sup 0}K*(892){sup 0} and B{sup 0} {yields}… more

Date: September 30, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of CP Asymmetries for the Decays B^+/- --> D^0_CP K*^+/-

Using a sample of 232 million {Upsilon}(4S) {yields} B{bar B} events collected with the BABAR detector at the PEP-II B Factory in 1999-2004, they study B{sup -} {yields} K{sup 0}K*(892){sup -} decays where K*{sup -} {yields} K{sub S}{sup 0} {pi}{sup -} and D{sup 0} {yields} K{sup -}{pi}{sup +}, K{sup -}{pi}{sup +}{pi}{sup 0}, K{sup -}{pi}{sup +}{pi}{sup +}{pi}{sup -} (non-CP final states); K{sup +}K{sup -}, {pi}{sup +}{pi}{sup -} (CP+ eigenstates); K{sub S}{sup 0}{pi}{sup 0}, K{sub S}{sup 0}{ph… more

Date: July 6, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of CP Asymmetries in B0->Ks Pi0 Pi0 Decays

The authors present a preliminary measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP = +1 final state K{sub S}{sup 0}{pi}{sup 0}{pi}{sup 0}, with K{sub S}{sup 0} {yields} {pi}{sup +}{pi}{sup -} and {pi}{sup 0} {yields} {gamma}{gamma}. They use a sample of approximately 227 million B-meson pairs recorded at the {Upsilon}(4S) resonance by the BABAR detector at the PEP-II B-Factory at SLAC. From a maximum likelihood fit they extract the mixing-induced CP-viola… more

Date: August 24, 2005

Creator: Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J. P. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department