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14.5k citations

Showing 2002 · hep-exShow all

22 papers · 2 filters

hep-ex2002★ 10 cited

Measurement of direct photon emission in decay using stopped positive kaons

Suguru Shimizu, for KEK-E470 Collaboration

The radiative decay () has been measured with stopped positive kaons. A sample containing 4k events was analyzed, and the branch…

hep-ex2002★ 13 cited

Simultaneous Measurement of the B0 Meson Lifetime and Mixing Frequency with B0 --> D*- l+ nu Decays

the BABAR Collaboration, B. Aubert

We measure the B0 lifetime τ_{B0} and the B0-B0bar oscillation frequency Δm_d with a sample of approximately 14,000 exclusively reconstructed B0 --> D*- l+ nu signal events, select…

hep-ex2002★ 7 cited

Measurement of the B0 meson lifetime with partial reconstruction of B0 --> D*- pi+ and B0 --> D*- rho+ decays

The BABAR Collaboration, B. Aubert

The neutral meson lifetime is measured with the data collected by the BaBar detector at the PEP-II storage ring during the years 1999 and 2000, with a total integrated luminosi…

hep-ex2002★ 11 cited

A Measurement of the tau -> mu nu nu Branching Ratio

The OPAL collaboration, G. Abbiendi

The tau -> mu nu nu branching ratio has been measured using data collected from 1990 to 1995 by the OPAL detector at the LEP collider. The resulting value of B(tau -> mu nu nu) = 0…

hep-ex2002★ 6 cited

Further search for T-violation in the decay K^+ --> pi^0 mu^+ nu

M. Abe, M. Aliev, V. Anisimovsky

A new result for the transverse mu^+ polarization, P_T, in the decay K^+ --> pi^0 mu^+ nu has been obtained in the KEK E246 experiment. Combined with our earlier result, P_T = (-1.…

hep-ex2002★ 10 cited

Charged particle multiplicities in heavy and light quark initiated events above the Z0 peak

The OPAL collaboration, G. Abbiendi

We have measured the mean charged particle multiplicities separately for bbbar, ccbar and light quark (uubar, ddbar, ssbar) initiated events produced in e+e- annihilations at LEP.…

hep-ex2002★ 7 cited

Measurement of Neutral-Current Four-Fermion Production at LEP2

The OPAL collaboration

Four-fermion final states qqbar e+e- and qqbar mu+mu- from neutral-current interactions in e+e- collisions are studied in the OPAL detector at LEP at centre-of-mass energies from 1…

hep-ex2002★ 12 cited

Measurement of the b quark forward-backward asymmetry around the Z0 peak using an inclusive tag

The OPAL collaboration, G. Abbiendi

The b quark forward-backward asymmetry has been measured using hadronic Z0 decays collected by the OPAL experiment at LEP. Z0 -> bbbar decays were selected using a combination of s…

hep-ex2002★ 48 cited

Search for Scalar Top and Scalar Bottom Quarks at LEP

The OPAL collaboration, G. Abbiendi

Searches for a scalar top quark and a scalar bottom quark have been performed using a data sample of 438 pb-1 at centre-of-mass energies of sqrt(s) = 192 - 209 GeV collected with t…

hep-ex2002★ 13 cited

A Measurement of the B0 -> J/psi pi+pi- Branching Fraction

B. Aubert

We present a measurement of the branching fraction for the decay of the neutral meson into the final state . The data set contains approximately 56 million $B\bar{B}…

hep-ex2002★ 27 cited

Measurement of the Branching Fraction for Inclusive Semileptonic B Meson Decays

B. Aubert

A largely model-independent measurement of the inclusive electron momentum spectrum and branching fraction for semileptonic decays of B mesons is presented based on data recorded a…

hep-ex2002★ 13 cited

Simultaneous Measurement of the B0 Meson Lifetime and Mixing Frequency with B0 --> D*- l+ nu_l Decays

B. Aubert, The BABAR Collaboration

We measure the B0 lifetime tau_B0 and the B-Bbar oscillation frequency Deltam_d with a sample of approximately 14,000 exclusively reconstructed B0 -> D*- l+ nu_l signal events, sel…

hep-ex2002★ 25 cited

Search for Associated Production of Massive States Decaying into Two Photonsin e+e- Annihilations at sqrt(s) = 88-209 GeV

The OPAL collaboration, G. Abbiendi

A search is performed for production of short-lived particles in e+e- -> XY, with X -> gamma gamma and Y -> ffbar, for scalar X and scalar or vector Y. Model-independent limits in…

hep-ex2002★ 121 cited

Measurements of Branching Fractions and CP-violating Asymmetries in B0->pi+ pi-, K+ pi-, K+ K- Decays

The BABAR Collaboration, B. Aubert

We present measurements of branching fractions and CP-violating asymmetries for neutral B meson decays to two-body final states of charged pions and kaons based on a sample of abou…

hep-ex2002★ 266 cited

Measurement of the CP-Violating Asymmetry Amplitude sin2beta

B. Aubert

We present results on time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 88 million Y(4S) --> B Bbar…

hep-ex2002★ 22 cited

Search for Charged Excited Leptons in e+e- Collisions at sqrt(s) = 183-209 GeV

The OPAL collaboration

A search for charged excited leptons decaying into a lepton and photon has been performed using approximately 680 pb-1 of e+e- collision data collected by the OPAL detector at LEP…

hep-ex2002★ 15 cited

Measurement of the Charm structure Function F2c of the Photon at LEP

The OPAL collaboration, G. Abbiendi

The production of charm quarks is studied in deep-inelastic electron-photon scattering using data recorded by the OPAL detector at LEP at normal e+e- centre-of-mass energies from 1…

hep-ex2002★ 16 cited

Impact of Energy and Luminosity upgrades at LHC on the Physics program of ATLAS

G. Azuelos, D. Benchekroun, O. Cakir +14

The impact on the physics capabilities of the ATLAS detector of possible LHC upgrades is discussed. As a benchmark, an increase in the luminosity by a factor of ten is considered.…

hep-ex2002★ 7 cited

Measurement of the Branching Fraction and CP Content for the Decay B0 --> D*+ D*-

The BaBar Collaboration, B. Aubert

We report a measurement of the branching fraction of the decay B^0 --> D^{*+} D^{*-} and of the CP-odd component of its final state using the BaBar detector. With data correspondin…

hep-ex2002★ 27 cited

Search for T and CP Violation in B0-anti-B0 Mixing with Inclusive Dilepton Events

B. Aubert

We report the results of a search for T and CP violation in B0-anti-B0 mixing using an inclusive dilepton sample collected by the BaBar experiment at the PEP-II B Factory. The asym…

hep-ex2002★ 13 cited

Measurement of the B0 Lifetime with Partially Reconstructed B0 --> D*- l+ nu Decays

The BABAR Collaboration, B. Aubert

The B0 lifetime has been measured with a sample of 23 million BBbar pairs collected by the BaBar detector at the PEP-II e+e- storage ring during 1999 and 2000. Events from the semi…

hep-ex2002★ 29 cited

Search for the Rare Decays B --> Kl^+l^- and B --> K^*l^+l^-

B. Aubert et al

We present results from a search for the flavor-changing neutral current decays and , where is either an or $μ^+μ…