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Remi Léandre Albert Louvot

Cette personne n’est plus à l’EPFL

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Publications associées (96)

Study of the decays B -> Ds1(2536)(+) (D)over-bar(()*())

Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Ji Hyun Kim, Jing Li

We report a study of the decays B -> D-s1(2536)+ (D) over bar (()()), where (D) over bar (()()) is (D) over bar (0), D- or D*(-), using a sample of 657 x 10(6)B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB asymm ...

American Physical Society2011

Evidence for the Suppressed Decay B- -> DK-, D -> K+pi-

Jean Wicht, Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Chao Wang, Vladislav Balagura, Jing Li

The suppressed decay chain B- -> DK-, D -> K+pi(-), where D indicates a (D) over bar (0) or D-0 state, provides important information on the CP-violating angle phi(3). We measure the ratio R-DK of the decay rates to the favored mode B- -> DK-, D -> K+pi(-) ...

2011

Observation of B-s(0) -> J/psi f(0)(980) and Evidence for B-s(0) -> J/psi f(0)(1370)

Jean Wicht, Remi Léandre Albert Louvot, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Jing Li

We report the observation of B-s(0) -> J/psi f(0(980)) and evidence for B-s(0) -> J/psi f(0)(1370), which are CP eignstate decay modes. These results are obtained from 121.4 fb(-1) of data collected at the Y(5S) resonance with the Belle detector at the KEK ...

2011

Measurement of CP violating asymmetries in B0 -> K+ K- KS0 decays with a time-dependent Dalitz approach

Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Chao Wang, Vladislav Balagura, Ji Hyun Kim, Xiao Wang

We report a measurement of CP violating asymmetries in B-0 ((B-0) over bar) -> (K+K-KS0) decays with a time-dependent Dalitz approach. This analysis is based on a data sample of 657 x 10(6) B (B) over bar pairs accumulated at the Y(4S) resonance with the B ...

American Physical Society2010

Evidence for B- -> tau(-)(nu)over-bar(tau) with a semileptonic tagging method

Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Mingkui Wang, Chao Wang, Ji Hyun Kim, Jing Li

We present a measurement of the decay B- -> tau(-)(nu) over bar (tau) using a data sample containing 657 x 10(6) B (B) over bar pairs collected at the gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. A sample of ...

American Physical Society2010

Measurement of the branching fractions for B0→Ds+π - and B0→Ds-K+ decays

Aurelio Bay, Remi Léandre Albert Louvot, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Ji Hyun Kim, Xiao Wang, Jing Li

We present a study of B0→Ds*+π- and B0→Ds*-K+ decays based on a sample of 657×106 BB̄ events collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure the branching fractions to be B(B0→Ds*+π-)=(1.75±0.34(stat)±0.17(syst) ±0 ...

American Physical Society2010

Measurement of Υ(5S) decays to B^{0} and B^{+} mesons

Jean Wicht, Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Mingkui Wang, Vladislav Balagura, Jing Li

Decays of the Gamma(5S) resonance to channels with B+ and B-0 mesons are studied using a 23.6 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. Fully reconstructed B+ -> J/psi K+, B-0 -> J/psi K-*0, B+ - ...

American Physical Society2010

Evidence for direct CP violation in the decay B^{±}→D^{(}*^{)}K^{±}, D→K_{S}^{0}π^{+}π^{-} and measurement of the CKM phase ϕ_{3}

Aurelio Bay, Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Jian Wang, Ji Hyun Kim, Xiao Wang, Jing Li

We present a new measurement of the unitarity triangle angle phi(3) using a Dalitz plot analysis of the K-S(0)pi(+)pi(-) decay of the neutral D meson produced in B-+/- -> D-(*()) K-+/- decays. The method exploits the interference between D-0 and (D) over b ...

American Physical Society2010

Measurement of |Vub| from inclusive charmless semileptonic B decays

Remi Léandre Albert Louvot, Olivier Schneider, Sun Hee Kim, Mingkui Wang, Chao Wang, Ji Hyun Kim, Jing Li

We present the partial branching fraction for inclusive charmless semileptonic B decays and the corresponding value of the Cabibbo-Kobayashi- Maskawa matrix element |Vub|, using a multivariate analysis method to access ∼90% of the B→Xu ν phase space. This ...

2010

Search for CP Violation in the Decays D_{(s)}^{+}→K_{S}^{0}π^{+} and D_{(s)}^{+}→K_{S}^{0}K^{+}

Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Jing Li

We have searched for CP violation in the charmed meson decays D-(s)(+) -> K-S(0)pi(+) and D-(s)(+) -> K-S(0) K+ ...

2010

Search for CP-violating charge asymmetry in B-+/- -> J/psi K-+/- decays

Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Ji Hyun Kim, Jing Li

We present the result of a search for charge asymmetry in B-+/- -> J/psi K-+/- decays using 772 X 10(6) B (B) over bar pairs collected at the Y(4S) resonance by the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The CP-violating charge asy ...

American Physical Society2010

Search for B-s(0) -> hh decays at the Y(5S) resonance

Jean Wicht, Remi Léandre Albert Louvot, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Chao Wang, Vladislav Balagura, Ji Hyun Kim, Jing Li

We have searched for B-s(0) --> hh decays, where h stands for a charged or neutral kaon, or a charged pion. These results are based on a 23: 6 fb(-1) data sample collected with the Belle detector on the Y(5S) resonance at the KEKB asymmetric-energy e(+)e(- ...

American Physical Society2010

Observation of Bs0 -> Ds()+ Ds()- using e+e- collisions and a determination of the Bs-Bsbar width difference Delta Gamma_s

Jean Wicht, Aurelio Bay, Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Ji Hyun Kim

We have made the first observation of B-s(0) -> D-s(()()+) D-s(()()-) decays using 23.6 fb(-1) of data recorded by the Belle experiment running on the Y(5S) resonance. The branching fractions are measured to be B(B-s(0) -> Ds+Ds-) = (1.03(-0.32-0.25)(+0. ...

2010

Measurement of the branching fractions and the invariant mass distributions for τ^{-}→h^{-}h^{+}h^{-}ν_{τ} decays

Aurelio Bay, Remi Léandre Albert Louvot, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Chao Wang, Ji Hyun Kim, Jing Li

We present a study of tau(-)->pi(-)pi(+)pi(-)nu(tau), tau(-) -> K-pi(+)pi(-)nu(tau), tau(-) -> K-K+ pi(-)nu(tau), and tau(-) -> K-K+K-nu(tau) decays using a 666 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric- energy e(+)e(-) co ...

American Physical Society2010

Observation of Bs0→Ds-π+ and Bs0→Ds() -ρ+ and measurement of the Bs0→Ds*-ρ+ longitudinal polarization fraction

Jean Wicht, Aurelio Bay, Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Ji Hyun Kim, Jing Li

First observations of the Bs0→Ds*-π+, Bs0→Ds-ρ+ and Bs0→Ds*-ρ+ decays are reported together with measurements of their branching fractions: B(Bs0→Ds*-π+)=[2.4-0.4+0.5(stat)±0.3(syst) ±0.4(fs)]×10-3, B(Bs0→Ds-ρ+)=[8.5-1. 2+1.3(stat)±1.1(syst)±1.3(fs)]×10-3 ...

2010

Search for lepton flavor violating τ- decays into ℓ-KS 0 and ℓ-KS 0KS 0

Aurelio Bay, Remi Léandre Albert Louvot, Olivier Schneider, Chao Wang, Vladislav Balagura, Jian Wang, Ji Hyun Kim, Xiao Wang, Jing Li

We have searched for the lepton-flavor-violating decays τ- decays into ℓ-KS 0 and ℓ-KS 0KS 0 (ℓ=e or μ), using a data sample of 671 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. No evidence for a signal was found in an ...

2010

Search for lepton-flavor-violating τ decays into three leptons with 719 million produced τ+ τ- pairs

Aurelio Bay, Remi Léandre Albert Louvot, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Chao Wang, Ji Hyun Kim, Jing Li

We present a search for lepton-flavor-violating τ decays into three leptons (electrons or muons) using 782 fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No evidence for these decays is observed and we set 90% ...

2010

Search for lepton flavor and lepton number violating τ decays into a lepton and two charged mesons

Aurelio Bay, Remi Léandre Albert Louvot, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Chao Wang, Vladislav Balagura, Ji Hyun Kim, Jing Li

We search for lepton flavor and lepton number violating τ decays into a lepton (ℓ = electron or muon) and two charged mesons (h, h′ = π± or K±), τ- → ℓ- h+ h′ - and τ- → ℓ+ h- h′ -, using 671 fb-1 of data collected with the Belle detector at the KEKB asymm ...

2010

Search for charmonium and charmoniumlike states in Υ(1S) radiative decays

Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Xiao Wang, Jing Li

Using a sample of 102 X 10(6) Y(1S) events collected with the Belle detector, we report on the first search for charge-parity-even charmonium and charmoniumlike states in Y(1S) radiative decays. No significant chi(cJ) or eta(c) signal is observed and 90% C ...

American Physical Society2010

Observation of a Charmoniumlike Enhancement in the γγ→ωJ/ψ Process

Remi Léandre Albert Louvot, Olivier Schneider, Tagir Aushev, Chao Wang, Ji Hyun Kim, Jing Li

We report the results of a search for a charmoniumlike state produced in the process gamma gamma -> omega J/psi in the 3.9-4.2 GeV = c(2) mass region. We observe a significant enhancement, which is well described by a resonant shape with mass M = (3915 +/- ...

2010

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