A. Büchler-Germann

activity

20102013

most citedFirst evidence for the decay Bs -> mu+ mu-

391 citations · 2.7k across the 32 of their papers we have counts for

collaborators

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33 papers · 1 filter

hep-ex2013★ 106 cited

Measurement of the cross-section for Z->e+e- production in pp collisions at sqrt{s}=7TeV

LHCb collaboration, R. Aaij, C. Abellan Beteta +625

A measurement of the cross-section for pp->Z->e+e- is presented using data at sqrt{s}=7TeV corresponding to an integrated luminosity of 0.94 fb^{-1}. The process is measured within…

hep-ex2013★ 166 cited

Measurement of the fragmentation fraction ratio $f_{s} / f_{d}$ and its dependence on $B$ meson kinematics

LHCb collaboration, R. Aaij, C. Abellan Beteta +624

The relative production rate of $B_{s}^{0}$ and $B^{0}$ mesons is determined with the hadronic decays $B_{s}^{0} \to D_{s}^{-} π^{+}$ and $B^{0} \to D^{-} K^{+}$ . The m…

hep-ex2012★ 11 cited

First observation of the decays $B ˉ_{(s)}^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ and $B ˉ_{s}^{0} \to D_{s 1} (2536)^{+} π^{-}$

LHCb collaboration, R. Aaij, C. Abellan Beteta +621

The first observation of the decays $B ˉ_{s}^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ and $B ˉ^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ are reported using an integrated luminosity of 1.0 fb $^{- 1}$ recorded by the…

hep-ex2012★ 17 cited

Measurement of CP observables in B0 -> D K*0 with D -> K+ K-

LHCb collaboration, R. Aaij, C. Abellan Beteta +625

The decay B0 -> D K*0 and the charge conjugate mode are studied using 1.0fb-1 of pp collision data collected by the LHCb experiment at sqrt(s) = 7TeV in 2011. The CP asymmetry betw…

hep-ex2012★ 26 cited

Measurement of the forward energy flow in pp collisions at sqrt(s)=7 TeV

LHCb collaboration, R. Aaij, C. Abellan Beteta +628

The energy flow created in pp collisions at sqrt(s)=7 TeV is studied within the pseudorapidity range 1.9<eta<4.9 with data collected by the LHCb experiment. The measurements are pe…

hep-ex2012★ 391 cited

First evidence for the decay Bs -> mu+ mu-

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

A search for the rare decays Bs->mu+mu- and B0->mu+mu- is performed using data collected in 2011 and 2012 with the LHCb experiment at the Large Hadron Collider. The data samples co…

hep-ex2012★ 62 cited

First observation of the decay $B_{s 2}^{} (5840)^{0} \to B^{+} K^{-}$ and studies of excited $B_{s}$ mesons

LHCb collaboration, R. Aaij, C. Abellan Beteta +621

Properties of the orbitally excited (L=1) $B_{s}$ states are studied using 1.0 fb $^{- 1}$ of pp collisions at $s = 7$ TeV collected with the LHCb detector. The first observation…

hep-ex2012★ 91 cited

Observation of D0-D0bar oscillations

LHCb collaboration, R. Aaij, C. Abellan Beteta +616

We report a measurement of the time-dependent ratio of D0->K+pi- to D0->K-pi+ decay rates in D*+-tagged events using 1.0 fb^{-1} of integrated luminosity recorded by the LHCb exper…

hep-ex2012★ 17 cited

A study of the $Z$ production cross-section in $pp$ collisions at $s = 7$ TeV using tau final states

The LHCb collaboration, R. Aaij, C. Abellan Beteta +621

A measurement of the inclusive $Z \to τ τ$ cross-section in $pp$ collisions at $s = 7$ TeV is presented based on a dataset of 1.0 fb $^{- 1}$ collected by the LHCb detector. Ca…

hep-ex2012★ 46 cited

First observation of the decay $B^{+} \to π^{+} μ^{+} μ^{-}$

LHCb Collaboration, R. Aaij, C. Abellan Beteta +621

A discovery of the rare decay $B^{+} \to π^{+} μ^{+} μ^{-}$ is presented. This decay is observed for the first time, with 5.2 $σ$ significance. The observation is made usin…

hep-ex2012★ 17 cited

First evidence for the annihilation decay mode $B^{+} \to D_{s}^{+} ϕ$

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

Evidence for the hadronic annihilation decay mode $B^{+} \to D_{s}^{+} ϕ$ is found with greater than $3 σ$ significance. The branching fraction and \CP asymmetry are measured to be \ma…

hep-ex2012★ 93 cited

Measurements of $B_{c}^{+}$ production and mass with the $B_{c}^{+} \to J / ψ π^{+}$ decay

LHCb collaboration, R. Aaij, C. Abellan Beteta +617

Measurements of $B_{c}^{+}$ production and mass are performed with the decay mode $B_{c}^{+} \to J / ψ π^{+}$ using 0.37 fb $^{- 1}$ of data collected in $pp$ collisions at $s = 7$ TeV by th…

hep-ex2012★ 22 cited

Search for the rare decay KS -> mu+ mu-

LHCb collaboration, R. Aaij, C. Abellan Beteta +616

A search for the decay KS -> mu+ mu- is performed, based on a data sample of 1.0 fb^-1 of pp collisions at \sqrt{s}=7 TeV collected by the LHCb experiment at the Large Hadron Colli…

hep-ex2012★ 28 cited

Measurement of the fraction of \Y1S originating from \chib1P decays in $pp$ collisions at $\sqrt{s} = 7\tev$

LHCb collaboration, R. Aaij, C. Abellan Beteta +616

The production of \chib1P mesons in $pp$ collisions at a centre-of-mass energy of $7\tev$ is studied using $32\invpb$ of data collected with the \lhcb detector. The $\chib1P$ meson…

hep-ex2012★ 41 cited

Measurement of prompt hadron production ratios in $pp$ collisions at $s =$ 0.9 and 7 TeV

LHCb collaboration, R. Aaij, C. Abellan Beteta +619

The charged-particle production ratios $p ˉ / p$ , $K^{-} / K^{+}$ , $π^{-} / π^{+}$ , $(p + p ˉ) / (π^{+} + π^{-})$ , $(K^{+} + K^{-}) / (π^{+} + π^{-})$ and $(p + p ˉ) / (K^{+} + K^{-})$ are measured with t…

hep-ex2012★ 198 cited

Strong constraints on the rare decays Bs -> mu+ mu- and B0 -> mu+ mu-

LHCb collaboration, R. Aaij, C. Abellan Beteta +607

A search for Bs -> mu+ mu- and B0 -> mu+ mu- decays is performed using 1.0 fb^-1 of pp collision data collected at \sqrt{s}=7 TeV with the LHCb experiment at the Large Hadron Colli…

hep-ex2012★ 123 cited

Inclusive $W$ and $Z$ production in the forward region at $s = 7$ TeV

LHCb collaboration, R. Aaij, C. Abellan Beteta +606

Measurements of inclusive $W$ and $Z$ boson production cross-sections in $pp$ collisions at $s = 7$ TeV using final states containing muons are presented. The data sample corr…

hep-ex2012

Measurement of psi(2S) meson production in pp collisions at sqrt(s)=7 TeV

LHCb collaboration, R. Aaij, C. Abellán Beteta +577

The differential cross-section for the inclusive production of psi(2S) mesons in pp collisions at sqrt(s)=7 TeV has been measured with the LHCb detector. The data sample correspond…

hep-ex2012★ 25 cited

Measurements of the branching fractions of the decays $B_{s}^{0} \to D_{s}^{\mp} K^{\pm}$ and $B_{s}^{0} \to D_{s}^{-} π^{+}$

The LHCb collaboration, R. Aaij, C. Abellan Beteta +592

The decay mode $\B^{0}_{s} \to D^{\mp}_{s} K^{\pm} $ allows for one of the theoretically cleanest measurements of the CKM angle $γ$ through the study of time-dependent $\ensuremath…

hep-ex2012★ 30 cited

Measurements of the branching fractions and CP asymmetries of B+ to J/psi pi+ and B+ to psi(2S) pi+ decays

LHCb collaboration, R. Aaij, C. Abellan Beteta +589

A study of B+ to J/psi pi+ and B+ to psi(2S) pi+ decays is performed with data corresponding to 0.37 fb-1 of proton-proton collisions at sqrt(s)=7 TeV. Their branching fractions ar…

hep-ex2012★ 76 cited

Opposite-side flavour tagging of B mesons at the LHCb experiment

LHCb Collaboration, R. Aaij, C. Abellan Beteta +594

The calibration and performance of the opposite-side flavour tagging algorithms used for the measurements of time-dependent asymmetries at the LHCb experiment are described. The al…

hep-ex2012★ 47 cited

Measurement of the B+- production cross-section in pp collisions at sqrt(s)=7 TeV

The LHCb Collaboration, R. Aaij, C. Abellan Beteta +594

The production of B+- mesons in proton-proton collisions at sqrt(s)=7 TeV is studied using 35 pb-1 of data collected by the LHCb detector. The B+- mesons are reconstructed exclusiv…

hep-ex2012★ 63 cited

First evidence of direct CP violation in charmless two-body decays of Bs mesons

LHCb collaboration, R. Aaij, C. Abellan Beteta +591

Using a data sample corresponding to an integrated luminosity of 0.35 $fb^{- 1}$ collected by LHCb in 2011, we report the first evidence of CP violation in the decays of $B…

hep-ex2012★ 91 cited

Determination of the sign of the decay width difference in the B_s system

LHCb Collaboration, R. Aaij, C. Abellan Beteta +594

The interference between the K+K- S-wave and P-wave amplitudes in B_s -> J/psi K+K- decays with the K+K- pairs in the region around the phi(1020) resonance is used to determine the…

Measurement of the cross-section for Z->e+e- production in pp collisions at sqrt{s}=7TeV

Measurement of the fragmentation fraction ratio fs​/fd​ and its dependence on B meson kinematics

First observation of the decays Bˉ(s)0​→Ds+​K−π+π− and Bˉs0​→Ds1​(2536)+π−

Measurement of CP observables in B0 -> D K*0 with D -> K+ K-

Measurement of the forward energy flow in pp collisions at sqrt(s)=7 TeV

First evidence for the decay Bs -> mu+ mu-

First observation of the decay Bs2∗​(5840)0→B∗+K− and studies of excited Bs​ mesons

Observation of D0-D0bar oscillations

A study of the Z production cross-section in pp collisions at s​=7 TeV using tau final states

First observation of the decay B+→π+μ+μ−

First evidence for the annihilation decay mode B+→Ds+​ϕ

Measurements of Bc+​ production and mass with the Bc+​→J/ψπ+ decay

Search for the rare decay KS -> mu+ mu-

Measurement of the fraction of \Y1S originating from \chib1P decays in pp collisions at $\sqrt{s} = 7\tev$

Measurement of prompt hadron production ratios in pp collisions at s​= 0.9 and 7 TeV

Strong constraints on the rare decays Bs -> mu+ mu- and B0 -> mu+ mu-

Inclusive W and Z production in the forward region at s​=7 TeV

Measurement of psi(2S) meson production in pp collisions at sqrt(s)=7 TeV

Measurements of the branching fractions of the decays Bs0​→Ds∓​K± and Bs0​→Ds−​π+

Measurements of the branching fractions and CP asymmetries of B+ to J/psi pi+ and B+ to psi(2S) pi+ decays

Opposite-side flavour tagging of B mesons at the LHCb experiment

Measurement of the B+- production cross-section in pp collisions at sqrt(s)=7 TeV

First evidence of direct CP violation in charmless two-body decays of Bs mesons

Determination of the sign of the decay width difference in the B_s system

Measurement of the fragmentation fraction ratio $f_{s} / f_{d}$ and its dependence on $B$ meson kinematics

First observation of the decays $B ˉ_{(s)}^{0} \to D_{s}^{+} K^{-} π^{+} π^{-}$ and $B ˉ_{s}^{0} \to D_{s 1} (2536)^{+} π^{-}$

First observation of the decay $B_{s 2}^{} (5840)^{0} \to B^{+} K^{-}$ and studies of excited $B_{s}$ mesons

A study of the $Z$ production cross-section in $pp$ collisions at $s = 7$ TeV using tau final states

First observation of the decay $B^{+} \to π^{+} μ^{+} μ^{-}$

First evidence for the annihilation decay mode $B^{+} \to D_{s}^{+} ϕ$

Measurements of $B_{c}^{+}$ production and mass with the $B_{c}^{+} \to J / ψ π^{+}$ decay

Measurement of the fraction of \Y1S originating from \chib1P decays in $pp$ collisions at $\sqrt{s} = 7\tev$

Measurement of prompt hadron production ratios in $pp$ collisions at $s =$ 0.9 and 7 TeV

Inclusive $W$ and $Z$ production in the forward region at $s = 7$ TeV

Measurements of the branching fractions of the decays $B_{s}^{0} \to D_{s}^{\mp} K^{\pm}$ and $B_{s}^{0} \to D_{s}^{-} π^{+}$