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First Measurement of the CP-Violating Phase in B0s→ϕϕ Decays
(American Physical Society, 2013-06-12)
A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in B0s→ϕϕ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the ...
Measurement of the effective B0s → K+K- lifetime
(Elsevier, 2012-10-02)
A precise determination of the effectiveB0s→K+K−lifetime can be used to con-strain contributions from physics beyond the Standard Model in theB0smesonsystem. Conventional approaches selectBmeson ...
Measurement of the cross-section for Z → e+e- production in pp collisions at s√=7 TeV
(Springer, 2013-02-19)
A measurement of the cross-section for pp → Z → e+e− is presented using data at s√=7
TeV corresponding to an integrated luminosity of 0.94 fb−1. The process is measured within the kinematic acceptance ...
Measurement of the B 0 → K ∗0 e + e − branching fraction at low dilepton mass
(Springer, 2013-05-29)
The branching fraction of the rare decay B 0 → K ∗0 e + e − in the dilepton mass region from 30 to 1000 MeV/c 2 has been measured by the LHCb experiment, using pp collision data, corresponding to an ...
Measurement of ϒ production in pp collisions at √ s = 2.76 TeV
(Springer, 2014-04-29)
The production of Υ(1S), Υ(2S) and Υ(3S) mesons decaying into the dimuon final state is studied with the LHCb detector using a data sample corresponding to an integrated luminosity of 3.3pb−1 collected ...
Measurement of the fragmentation fraction ratio f s /f d and its dependence on B meson kinematics
(Springer, 2013-04-02)
The relative production rate of B0s and B 0 mesons is determined with the hadronic decays B0s→D−sπ+ and B 0 → D − K +. The measurement uses data corresponding to 1.0 fb−1 of pp collisions at a centre-of-mass ...
First observation of B0 → D∗+ Xμ−ν decays
(Elsevier, 2011)
Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays Bs -> Ds+ X mu nu and Bs -> D0 K+ X mu nu are detected. Two structures ...
Precision measurement of the ratio of the Λb0 to B¯0 lifetimes
(Elsevier, 2014-06-27)
The LHCb measurement of the lifetime ratio of the Λ0b to the B⎯⎯⎯0 meson is updated using data corresponding to an integrated luminosity of 3.0 fb−1 collected using 7 and 8 TeV centre-of-mass energy pp ...
Measurement of the cross-section ratio σ(χc2)/σ(χc1) for prompt χc production at √s=7TeV
(Elsevier, 2012-08-14)
The prompt production of the charmonium $\chi_{c1}$ and $\chi_{c2}$ mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of $\sqrt{s}=7$ TeV. The ...
Measurement of the Ξ−b and Ω−b baryon lifetimes
(Elsevier, 2014-09-07)
Using a data sample of pp collisions corresponding to an integrated luminosity of 3 fb−1, the Ξ−b and Ω−b baryons are reconstructed in the Ξ−b→J/ψΞ− and Ω−b→J/ψΩ− decay modes and their lifetimes measured ...