K. Kruzelecki

activity

20102012

most citedMeasurement of J/psi production in pp collisions at sqrt(s)=7 TeV

343 citations · 1.9k across the 27 of their papers we have counts for

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27 papers · 1 filter

hep-ex2012★ 21 cited

Measurement of the effective $B_{s}^{0} \to K^{+} K^{-}$ lifetime

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

A precise determination of the effective $B_{s}^{0} \to K^{+} K^{-}$ lifetime can be used to constrain contributions from physics beyond the Standard Model in the $B_{s}^{0}$ meson sys…

hep-ex2012★ 34 cited

Measurement of relative branching fractions of B decays to $ψ (2 S)$ and $J / ψ$ mesons

LHCb Collaboration

The relative rates of B-meson decays into $J / ψ$ and $ψ (2 S)$ mesons are measured for the three decay modes in pp collisions recorded with the LHCb detector. The ratios of branching…

hep-ex2012★ 114 cited

Observation of excited Lambda_b0 baryons

LHCb collaboration, R. Aaij, C. Abellan Beteta +615

Using pp collision data corresponding to 1.0 fb-1 integrated luminosity collected by the LHCb detector, two narrow states are observed in the Lambda_b0pi+pi- spectrum with masses 5…

hep-ex2012★ 88 cited

Measurement of the isospin asymmetry in $B \to K^{(*)} μ^{+} μ^{-}$ decays

LHCb collaboration, R. Aaij, C. Abellan Beteta +615

The isospin asymmetries of $B \to K^{(*)} μ^{+} μ^{-}$ decays and the partial branching fractions of $B^{0} \to K^{0} μ^{+} μ^{-}$ and $B^{+} \to K^{*+} μ^{+} μ^{-}$ are measured as a function of the di-m…

hep-ex2012★ 163 cited

Observation of double charm production involving open charm in pp collisions at $s$ =7 TeV

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

The production of $J / ψ$ mesons accompanied by open charm, and of pairs of open charm hadrons are observed in pp collisions at a centre-of-mass energy of 7 TeV using an integrated l…

hep-ex2012★ 21 cited

Measurement of the $B_{s}^{0} \to J / ψ K_{S}^{0}$ branching fraction

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

The $B_{s}^{0} \to J / ψ K_{S}^{0}$ branching fraction is measured in a data sample corresponding to 0.41 $f b^{- 1}$ of integrated luminosity collected with the LHCb detector at the LHC. This ch…

hep-ex2012★ 93 cited

Analysis of the resonant components in Bs->J/ψπ+π-

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

The decay Bs->J/ψπ+π- can be exploited to study CP violation. A detailed understanding of its structure is imperative in order to optimize its usefulness. An analysis of this three…

hep-ex2012★ 76 cited

Measurement of the ratio of prompt $χ_{c}$ to $J / ψ$ production in $pp$ collisions at $s = 7$ TeV

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

The prompt production of charmonium $χ_{c}$ and $J / ψ$ states is studied in proton-proton collisions at a centre-of-mass energy of $s = 7$ TeV at the Large Hadron Collider. The…

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★ 83 cited

First observation of the decay Bc+ to J/psi pi+pi-pi+

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

The decay Bc+ --> J/psi pi+pi-pi+ is observed for the first time, using 0.8 fb-1 of pp collisions at sqrt{s}=7 TeV collected by the LHCb experiment. The ratio of branching fraction…

hep-ex2012★ 18 cited

Measurement of the ratio of branching fractions BR(B0 -> K*0 gamma)/BR(Bs0 -> phi gamma)

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

The ratio of branching fractions of the radiative B decays B0 -> K*0 gamma and Bs0 -> phi gamma has been measured using 0.37 fb-1 of pp collisions at a centre of mass energy of sqr…

hep-ex2012★ 101 cited

Measurement of Upsilon production in pp collisions at \sqrt{s} = 7 TeV

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

The production of Upsilon(1S), Upsilon(2S) and Upsilon(3S) mesons in proton-proton collisions at the centre-of-mass energy of sqrt(s)=7 TeV is studied with the LHCb detector. The a…

hep-ex2012★ 69 cited

Measurement of the cross-section ratio $σ (χ_{c 2}) / σ (χ_{c 1})$ for prompt $χ_{c}$ production at $s = 7$ TeV

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

The prompt production of the charmonium $χ_{c 1}$ and $χ_{c 2}$ mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of $\sqrt{…

hep-ex2012★ 34 cited

Measurement of the CP violating phase ϕ_s in Bs->J/ψf0(980)

LHCb Collaboration, R. Aaij, C. Abellan Beteta +585

Measurement of mixing-induced CP violation in Bs decays is of prime importance in probing new physics. So far only the channel Bs->J/ψϕ has been used. Here we report on a measureme…

hep-ex2011★ 73 cited

Measurement of b-hadron masses

LHCb Collaboration, R. Aaij, C. Abellan Beteta +583

Measurements of b-hadron masses are performed with the exclusive decay modes B+ -> J/psi K+, B0 -> J/psi K*0, B0 -> J/psi K0S, B0_s -> J/psi phi and Lambda_b -> J/psi Lambda using…

hep-ex2011★ 20 cited

Observation of Bs -> J/ψf'2(1525) in J/ψK+K- final states

LHCb Collaboration, R. Aaij, C. Abellan Beteta +583

The decay Bs -> J/ψK+ K- is investigated using 0.16/fb of data collected with the LHCb detector using 7 TeV pp collisions. Although the J/ψϕ channel is well known, final states at…

hep-ex2011★ 68 cited

Measurement of the B^0_s - \bar{B}^0_s oscillation frequency Delta m_s in B^0_s -> D_s^-(3) pi decays

LHCb Collaboration, R. Aaij, C. Abellan Beteta +579

The B^0_s-\bar{B}^0_s oscillation frequency Delta m_s is measured with 36 pb^{-1} of data collected in pp collisions at \sqrt{s} = 7 TeV by the LHCb experiment at the Large Hadron…

hep-ex2011★ 90 cited

Differential branching fraction and angular analysis of the decay $B^{0} \to K^{* 0} μ^{+} μ^{-}$

LHCb Collaboration, R. Aaij, C. Abellan Beteta +585

The angular distributions and the partial branching fraction of the decay $B^{0} \to K^{* 0} μ^{+} μ^{-}$ are studied using an integrated luminosity of $0.37 f b^{- 1}$ of data c…

hep-ex2011★ 23 cited

First observation of the decay $B ˉ_{s}^{0} \to D^{0} K^{* 0}$ and a measurement of the ratio of branching fractions $\frac{B ( B ˉ _{s}^{0} \to D ^{0} K ^{* 0} )}{B ( B ˉ ^{0} \to D ^{0} ρ ^{0} )}$

LHCb Collaboration, R. Aaij, C. Abellan Beteta +578

The first observation of the decay $B ˉ_{s}^{0} \to D^{0} K^{* 0}$ using $pp$ data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated l…

hep-ex2011★ 22 cited

Measurement of the effective $B_{s}^{0} \to K^{+} K^{-}$ lifetime

LHCb Collaboration, R. Aaij, C. Abellan Beteta +586

A measurement of the effective $B_{s}^{0} \to K^{+} K^{-}$ lifetime is presented using approximately $37 p b^{- 1}$ of data collected by LHCb during 2010. This quantity can be used to…

hep-ex2011★ 50 cited

Search for the lepton number violating decays $B^{+} \to π^{-} μ^{+} μ^{+}$ and $B^{+} \to K^{-} μ^{+} μ^{+}$

The LHCb Collaboration, R. Aaij, C. Abellan Beteta +578

A search is performed for the lepton number violating decay $B^{+} \to h^{-} μ^{+} μ^{+}$ , where $h^{-}$ represents a $K^{-}$ or a $π^{-}$ , using data from the LHCb detector corresponding to an…

hep-ex2011★ 35 cited

Measurements of the Branching fractions for $B_{(} s) - > D_{(} s) π π π$ and $Λ_{b}^{0} - > Λ_{c}^{+} π π π$

LHCb Collaboration, R. Aaij, B. Adeva +566

Branching fractions of the decays $H_{b} \to H_{c} π^{-} π^{+} π^{-}$ relative to $H_{b} \to H_{c} π^{-}$ are presented, where $H_{b}$ ( $H_{c}$ ) represents B^0-bar( $D^{+}$ ), $B^{-}$ ( $D^{0}$ ), B_s^0-bar ( $D_{s}^{+}$ )…

hep-ex2011★ 28 cited

Measurement of $V^{0}$ production ratios in $pp$ collisions at $s = 0.9$ and 7\,TeV

LHCb Collaboration, R. Aaij, B. Adeva +547

The $Λ ˉ /Λ$ and $Λ ˉ / K_{S}^{0}$ production ratios are measured by the LHCb detector from $0.3 nb^{- 1}$ of $pp$ collisions delivered by the LHC at $\sqrt{s} =…

hep-ex2011★ 45 cited

Determination of f_s/f_d for 7 TeV pp collisions and a measurement of the branching fraction of the decay Bd->D-K+

LHCb Collaboration, R. Aaij, B. Adeva +548

The relative abundance of the three decay modes $B_{d} \to D^{-} K^{+}$ , $B_{d} \to D^{-} π^{+}$ and $B_{s} \to D_{s}^{-} π^{+}$ produced in 7 TeV $pp$ collisions at the LHC is determined from data co…

Measurement of the effective Bs0​→K+K− lifetime

Measurement of relative branching fractions of B decays to ψ(2S) and J/ψ mesons

Observation of excited Lambda_b0 baryons

Measurement of the isospin asymmetry in B→K(∗)μ+μ− decays

Observation of double charm production involving open charm in pp collisions at s​=7 TeV

Measurement of the Bs0​→J/ψKS0​ branching fraction

Analysis of the resonant components in Bs->J/ψπ+π-

Measurement of the ratio of prompt χc​ to J/ψ production in pp collisions at s​=7 TeV

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

First observation of the decay Bc+ to J/psi pi+pi-pi+

Measurement of the ratio of branching fractions BR(B0 -> K*0 gamma)/BR(Bs0 -> phi gamma)

Measurement of Upsilon production in pp collisions at \sqrt{s} = 7 TeV

Measurement of the cross-section ratio σ(χc2​)/σ(χc1​) for prompt χc​ production at s​=7 TeV

Measurement of the CP violating phase ϕ_s in Bs->J/ψf0(980)

Measurement of b-hadron masses

Observation of Bs -> J/ψf'2(1525) in J/ψK+K- final states

Measurement of the B^0_s - \bar{B}^0_s oscillation frequency Delta m_s in B^0_s -> D_s^-(3) pi decays

Differential branching fraction and angular analysis of the decay B0→K∗0μ+μ−

First observation of the decay Bˉs0​→D0K∗0 and a measurement of the ratio of branching fractions B(Bˉ0→D0ρ0)B(Bˉs0​→D0K∗0)​

Measurement of the effective Bs0​→K+K− lifetime

Search for the lepton number violating decays B+→π−μ+μ+ and B+→K−μ+μ+

Measurements of the Branching fractions for B(​s)−>D(​s)πππ and Λb0​−>Λc+​πππ

Measurement of V0 production ratios in pp collisions at s​=0.9 and 7\,TeV

Determination of f_s/f_d for 7 TeV pp collisions and a measurement of the branching fraction of the decay Bd->D-K+

Measurement of the effective $B_{s}^{0} \to K^{+} K^{-}$ lifetime

Measurement of relative branching fractions of B decays to $ψ (2 S)$ and $J / ψ$ mesons

Measurement of the isospin asymmetry in $B \to K^{(*)} μ^{+} μ^{-}$ decays

Observation of double charm production involving open charm in pp collisions at $s$ =7 TeV

Measurement of the $B_{s}^{0} \to J / ψ K_{S}^{0}$ branching fraction

Measurement of the ratio of prompt $χ_{c}$ to $J / ψ$ production in $pp$ collisions at $s = 7$ TeV

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

Measurement of the cross-section ratio $σ (χ_{c 2}) / σ (χ_{c 1})$ for prompt $χ_{c}$ production at $s = 7$ TeV

Differential branching fraction and angular analysis of the decay $B^{0} \to K^{* 0} μ^{+} μ^{-}$

First observation of the decay $B ˉ_{s}^{0} \to D^{0} K^{* 0}$ and a measurement of the ratio of branching fractions $\frac{B ( B ˉ _{s}^{0} \to D ^{0} K ^{* 0} )}{B ( B ˉ ^{0} \to D ^{0} ρ ^{0} )}$

Measurement of the effective $B_{s}^{0} \to K^{+} K^{-}$ lifetime

Search for the lepton number violating decays $B^{+} \to π^{-} μ^{+} μ^{+}$ and $B^{+} \to K^{-} μ^{+} μ^{+}$

Measurements of the Branching fractions for $B_{(} s) - > D_{(} s) π π π$ and $Λ_{b}^{0} - > Λ_{c}^{+} π π π$

Measurement of $V^{0}$ production ratios in $pp$ collisions at $s = 0.9$ and 7\,TeV