Concept

Kaon

Related publications (427)

Search for neutrinoless decays τ → ℓ h h and τ → ℓ V0

Olivier Schneider, Aurelio Bay, Stewart Cole, Sun Hee Kim

We have searched for neutrinoless τ lepton decays into ℓhh or ℓ V0, where ℓ stands for an electron or muon, h for a charged light hadron, π or K, and V0 for a neutral vector meson, ρ0, K* (892)0 and φ{symbol}, using a 158 fb-1 data sample collected with th ...

2006

B°s -> J/[psi] [eta] decays and sensitivity to the B°s mixing at LHCb

The LHCb experiment will be installed in the proton-proton Large Hadron Collider (LHC) at CERN, Geneva. The detector is a single arm spectrometer currently under construction: LHC running and LHCb data taking will start in 2007. LHCb will then benefit from ...

EPFL2005

Determination of |Vub| from measurements of the inclusive charmless semileptonic partial rates of B mesons using full reconstruction tags

Aurelio Bay, Stewart Cole, Sun Hee Kim, Sanjeev Kumar, Jing Li

We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element data collected by the Belle detector at the KEKB e+e-asymmetric collider. Events are tagged by fully reconstructing one of the B mesons, produced in pairs from Υ(4S). The signal for b ...

2005

Observation of B0→π0π0

Aurelio Bay, Tagir Aushev, Sun Hee Kim, Ji Hyun Kim, Sanjeev Kumar, Jing Li

We report the observation of the decay B0→π0π0, using a 253fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB e+e- collider. The measured branching fraction is B(B0→π0π0)= (2.3-0.5-0.3+0.4+0.2)×10-6, with a significance o ...

2005

Branching fraction, polarization and CP-violating asymmetries in B 0→D+D- decays

Olivier Schneider, Aurelio Bay, Mingkui Wang, Chao Wang, Tagir Aushev, Lei Zhang, Vladislav Balagura, Sun Hee Kim, Ji Hyun Kim, Jing Li

We present measurements of the branching fraction, the polarization parameters and CP-violating asymmetries in B0→D*+D *- decays using a 140 fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collid ...

2005

Measurement of the wrong-sign decays D0→K+π-π0 and D0→K+π-π+π-, and search for CP violation

Aurelio Bay, Tagir Aushev, Sun Hee Kim, Jing Li

Using 281fb-1 of data from the Belle experiment recorded at or near the Υ(4S) resonance, we have measured the rates of the "wrong-sign" decays D0→K+π-π0 and D0→K+π-π+π- relative to those of the Cabibbo-favored decays D0→K-π+π0 and D0→K-π+π+π-. These wrong- ...

2005

Measurements of B decays to two kaons

Aurelio Bay, Stewart Cole, Tagir Aushev, Vladislav Balagura, Sun Hee Kim, Ji Hyun Kim, Jing Li

We report measurements of B meson decays to two kaons using 253fb-1 of data collected with the Belle detector at the KEKB energy-asymmetric e+e- collider. We find evidence for signals in B+→K̄0K+ and B0→K0K̄0 with significances of 3.0σ and 3.5σ, respective ...

2005

Ultrafast Excited State Dynamics of the Protonated Schiff Base of All-trans Retinal in Solvents

Goran Zgrablic

We present a comparative study of the ultrafast photophysics of all-trans retinal in the protonated Schiff base form in solvents with different polarities and viscosities. Steady-state spectra of retinal in the protonated Schiff base form show large absorp ...

2005

Evidence for the decay ∑+ → pμ+ μ-

Yixing Chen, Yu Fu

We report the first evidence for the decay ∑+ → pμ+ μ- from data taken by the HyperCP (E871) experiment at Fermilab. Based on three observed events, the branching ratio is B(∑+ → pμ+ μ-) = [8.6 -5.4 +6.6(stat) ± 5.5(syst)] × 10 -8. The narrow range of dimu ...

2005

Search for CP violation in charged-Ξ and Λ hyperon decays

Yixing Chen, Yu Fu

The novel sources of CP violation observed in charged χ and λ hyperon decays were investigated. A comparison of the p and p̄ angular distributions in the hyperon decays was made using a subset of the data from the HyperCP experiment (E871) at Fermilab. A p ...

2004

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