S. Furcas

article

Addendum: Observation of double charm production involving open charm in pp collisions at $\sqrt{s}$ = 7 TeV

The LHCb collaboration, R. Aaij, C. Abellan Beteta, B. Adeva, more

Journal of High Energy Physics > 2014 > 2014 > 3 > 1-8

article

Observation of the decay Bs0→D¯0ϕ

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, more

Physics Letters B > 2013 > 727 > 4-5 > 403-411

First observation of the decay B _s ⁰ ->D ⁰ φ is reported using pp collision data, corresponding to an integrated luminosity of 1.0 fb ^- ¹ , collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. The significance of the signal is 6.5 standard deviations. The branching fraction is measured relative to that of the decay B _s ⁰ ->D ⁰...

article

Model-independent search for CP violation in D0→K−K+π−π+ and D0→π−π+π+π− decays

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, more

Physics Letters B > 2013 > 726 > 4-5 > 623-633

A search for CP violation in the phase-space structures of D ⁰ and D ⁰ decays to the final states K ^- K ⁺ π ^- π ⁺ and π ^- π ⁺ π ⁺ π ^- is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0 fb ^- ¹ collected in 2011 by the LHCb experiment in pp collisions at a...

article

Branching fraction and CP asymmetry of the decays B+→KS0π+ and B+→KS0K+

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, more

Physics Letters B > 2013 > 726 > 4-5 > 646-655

An analysis of B ⁺ ->K _S ⁰ π ⁺ and B ⁺ ->K _S ⁰ K ⁺ decays is performed with the LHCb experiment. The pp collision data used correspond to integrated luminosities of 1 fb ^- ¹ and 2 fb ^- ¹ collected at centre-of-mass energies of s=7 TeV and s=8 TeV, respectively. The ratio of branching fractions and the direct CP asymmetries...

article

Measurement of the CKM angle γ from a combination of B±→Dh± analyses

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, more

Physics Letters B > 2013 > 726 > 1-3 > 151-163

A combination of three LHCb measurements of the CKM angle γ is presented. The decays B ⁺ /-->DK ⁺ /- and B ⁺ /-->Dπ ⁺ /- are used, where D denotes an admixture of D ⁰ and D ⁰ mesons, decaying into K ⁺ K ^- , π ⁺ π ^- , K ⁺ /-π , K ⁺ /-π π ⁺ /-π , K _S ⁰ ...

article

Observation of Bs0→χc1ϕ decay and study of B0→χc1,2K⁎0 decays

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, more

Nuclear Physics, Section B > 2013 > 874 > 3 > 663-678

The first observation of the decay B _s ⁰ ->χ _c ₁ φ and a study of B ⁰ ->χ _c ₁ _, ₂ K ⁰ decays are presented. The analysis is performed using a dataset, corresponding to an integrated luminosity of 1.0 fb ^- ¹ , collected by the LHCb experiment in pp collisions at a centre-of-mass energy of 7 TeV. The following ratios...

article

Measurement of the effective Bs0→J/ψKS0 lifetime

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, more

Nuclear Physics, Section B > 2013 > 873 > 2 > 275-292

This paper reports the first measurement of the effective B _s ⁰ ->J/ψK _S ⁰ lifetime and an updated measurement of its time-integrated branching fraction. Both measurements are performed with a data sample, corresponding to an integrated luminosity of 1.0 fb ^- ¹ of pp collisions, recorded by the LHCb experiment in 2011 at a centre-of-mass energy of 7 TeV. The...

article

Measurement of the differential branching fraction of the decay Λb0→Λμ+μ−

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, more

Physics Letters B > 2013 > 725 > 1-3 > 25-35

The differential branching fraction of the decay Λ_b ⁰->Λμ⁺μ^- is measured as a function of the square of the dimuon invariant mass, q². A yield of 78+/-12Λ_b ⁰->Λμ⁺μ^- decays is observed using data, corresponding to an integrated luminosity of 1.0 fb^- ¹, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. A significant signal is found in the q² region above the square of the J/ψ...

article

Search for the rare decay D0→μ+μ−

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, more

Physics Letters B > 2013 > 725 > 1-3 > 15-24

A search for the rare decay D⁰->μ⁺μ^- is performed using a data sample, corresponding to an integrated luminosity of 0.9 fb^- ¹, of pp collisions collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The observed number of events is consistent with the background expectations and corresponds to an upper limit of B(D⁰->μ⁺μ^-)<6.2(7.6)x10^- ⁹ at 90% (95%) confidence level. This...

article

Search for D(s)+→π+μ+μ− and D(s)+→π−μ+μ+ decays

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, more

Physics Letters B > 2013 > 724 > 4-5 > 203-212

A search for non-resonant D₍ _s ₎ ⁺->π⁺μ⁺μ^- and D₍ _s ₎ ⁺->π^-μ⁺μ⁺ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb^- ¹, at s=7TeV recorded by the LHCb experiment in 2011. No signals are observed and the 90% (95%) confidence level (CL) limits on the branching fractions are found to beB(D⁺->π⁺μ⁺μ^-)<7.3(8.3)x10^- ⁸,B(D_s ⁺->π⁺μ⁺μ^-)<4...

article

Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, more

Physics Letters B > 2013 > 724 > 1-3 > 36-45

Searches for the lepton flavour violating decay τ^-->μ^-μ⁺μ^- and the lepton flavour and baryon number violating decays τ^-->p μ⁺μ^- and τ^-->pμ^-μ^- have been carried out using proton-proton collision data, corresponding to an integrated luminosity of 1.0 fb^- ¹, taken by the LHCb experiment at s=7 TeV. No evidence has been found for any signal, and limits have been set at 90% confidence level on...

article

Measurements of the Λb0→J/ψΛ decay amplitudes and the Λb0 polarisation in pp collisions at s=7 TeV

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, more

Physics Letters B > 2013 > 724 > 1-3 > 27-35

An angular analysis of Λ_b ⁰->J/ψΛ decays is performed using a data sample corresponding to 1.0 fb^- ¹ collected in pp collisions at s=7 TeV with the LHCb detector at the LHC. A parity violating asymmetry parameter characterising the Λ_b ⁰->J/ψΛ decay of 0.05+/-0.17+/-0.07 and a Λ_b ⁰ transverse production polarisation of 0.06+/-0.07+/-0.02 are measured, where the first uncertainty is statistical...

article

Observation of the suppressed ADS modes B±→[π±K∓π+π−]DK± and B±→[π±K∓π+π−]Dπ±

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, more

Physics Letters B > 2013 > 723 > 1-3 > 44-53

An analysis of B⁺/-->DK⁺/- and B⁺/-->Dπ⁺/- decays is presented where the D meson is reconstructed in the four-body final state K⁺/-π π⁺π^-. Using LHCb data corresponding to an integrated luminosity of 1.0fb^- ¹, first observations are made of the suppressed ADS modes B⁺/-->[π⁺/-K π⁺π^-]_DK⁺/- and B⁺/-->[π⁺/-K π⁺π^-]_Dπ⁺/- with a significance of 5.1σ and greater than 10σ, respectively. Measurements...

article

Search for direct CP violation in D0→h−h+ modes using semileptonic B decays

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, more

Physics Letters B > 2013 > 723 > 1-3 > 33-43

A search for direct CP violation in D⁰->h^-h⁺ (where h=K or π) is presented using data corresponding to an integrated luminosity of 1.0 fb^- ¹ collected in 2011 by LHCb in pp collisions at a centre-of-mass energy of 7 TeV. The analysis uses D⁰ mesons produced in inclusive semileptonic b-hadron decays to the D⁰μX final state, where the charge of the accompanying muon is used to tag the flavour of...

article

Prompt charm production in pp collisions at s=7 TeV

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, more

Nuclear Physics, Section B > 2013 > 871 > 1 > 1-20

Charm production at the LHC in pp collisions at s=7 TeV is studied with the LHCb detector. The decays D0→K−π+, D+→K−π+π+, D⁎+→D0(K−π+)π+, Ds+→ϕ(K−K+)π+, Λc+→pK−π+, and their charge conjugates are analysed in a data set corresponding to an integrated luminosity of 15 nb ⁻¹ . Differential cross-sections dσ/dpT are measured for prompt production of the five charmed hadron species in bins of transverse...

article

Measurement of the time-dependent CP asymmetry in B0→J/ψKS0 decays

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, more

Physics Letters B > 2013 > 721 > 1-3 > 24-31

This Letter reports a measurement of the CP violation observables S_J _/ _ψ _K _" _S _^ ₀ and C_J _/ _ψ _K _" _S _^ ₀ in the decay channel B⁰->J/ψK_S ⁰ performed with 1.0 fb^- ¹ of pp collisions at s=7 TeV collected by the LHCb experiment. The fit to the data yields S_J _/ _ψ _K _" _S _^ ₀=0.73+/-0.07(stat)+/-0.04(syst) and C_J _/ _ψ _K _" _S _^ ₀=0.03+/-0.09(stat)+/-0.01(syst). Both values are consistent...

article

Measurement of the B0–B¯0 oscillation frequency Δmd with the decays B0→D−π+ and B0→J/ψK⁎0

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, more

Physics Letters B > 2013 > 719 > 4-5 > 318-325

The B0–B¯0 oscillation frequency Δmd is measured by the LHCb experiment using a dataset corresponding to an integrated luminosity of 1.0 fb−1 of proton–proton collisions at s=7 TeV, and is found to be Δmd=0.5156±0.0051(stat.)±0.0033(syst.) ps−1. The measurement is based on results from analyses of the decays B0→D−π+ (D−→K+π−π−) and B0→J/ψK⁎0 (J/ψ→μ+μ−,K⁎0→K+π−) and their charge conjugated modes.

article

Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of Bs0 meson decays to J/ψη and J/ψη′

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, more

Nuclear Physics, Section B > 2013 > 867 > 3 > 547-566

First evidence of the B0→J/ψω decay is found and the Bs0→J/ψη and Bs0→J/ψη′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb ⁻¹ collected by the LHCb experiment in proton–proton collisions at a centre-of-mass energy of s=7 TeV. The branching fractions of these decays are measured relative to that of the B0→J/ψρ0 decay:B(B0→J/ψω)B(B0→J/ψρ0)=0.89±0.19(stat)−0...

article

Measurement of the ratio of branching fractions B(B0→K⁎0γ)/B(Bs0→ϕγ) and the direct CP asymmetry in B0→K⁎0γ

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, more

Nuclear Physics, Section B > 2013 > 867 > 1 > 1-18

The ratio of branching fractions of the radiative B decays B0→K⁎0γ and Bs0→ϕγ has been measured using an integrated luminosity of 1.0 fb ⁻¹ of pp collision data collected by the LHCb experiment at a centre-of-mass energy of s=7 TeV. The value obtained isB(B0→K⁎0γ)B(Bs0→ϕγ)=1.23±0.06 (stat.)±0.04 (syst.)±0.10(fs/fd), where the first uncertainty is statistical, the second is the experimental...

article

Measurement of the D± production asymmetry in 7 TeV pp collisions

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, more

Physics Letters B > 2013 > 718 > 3 > 902-909

The asymmetry in the production cross-section σ of D± mesons,AP=σ(D+)−σ(D−)σ(D+)+σ(D−), is measured in bins of pseudorapidity η and transverse momentum pT within the acceptance of the LHCb detector. The result is obtained with a sample of D+→KS0π+ decays corresponding to an integrated luminosity of 1.0 fb⁻¹, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider...

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Search results for: S. Furcas

Addendum: Observation of double charm production involving open charm in pp collisions at $\sqrt{s}$ = 7 TeV

Observation of the decay Bs0→D¯0ϕ

Model-independent search for CP violation in D0→K−K+π−π+ and D0→π−π+π+π− decays

Branching fraction and CP asymmetry of the decays B+→KS0π+ and B+→KS0K+

Measurement of the CKM angle γ from a combination of B±→Dh± analyses

Observation of Bs0→χc1ϕ decay and study of B0→χc1,2K⁎0 decays

Measurement of the effective Bs0→J/ψKS0 lifetime

Measurement of the differential branching fraction of the decay Λb0→Λμ+μ−

Search for the rare decay D0→μ+μ−

Search for D(s)+→π+μ+μ− and D(s)+→π−μ+μ+ decays

Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb

Measurements of the Λb0→J/ψΛ decay amplitudes and the Λb0 polarisation in pp collisions at s=7 TeV

Observation of the suppressed ADS modes B±→[π±K∓π+π−]DK± and B±→[π±K∓π+π−]Dπ±

Search for direct CP violation in D0→h−h+ modes using semileptonic B decays

Prompt charm production in pp collisions at s=7 TeV

Measurement of the time-dependent CP asymmetry in B0→J/ψKS0 decays

Measurement of the B0–B¯0 oscillation frequency Δmd with the decays B0→D−π+ and B0→J/ψK⁎0

Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of Bs0 meson decays to J/ψη and J/ψη′

Measurement of the ratio of branching fractions B(B0→K⁎0γ)/B(Bs0→ϕγ) and the direct CP asymmetry in B0→K⁎0γ

Measurement of the D± production asymmetry in 7 TeV pp collisions

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