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Publications (42)

hep-ex2012

Measurement of b hadron production fractions in 7 TeV pp collisions

The LHCb Collaboration, R. Aaij, C. Abellan Beteta +587

Measurements of $b$ hadron production ratios in proton-proton collisions at a centre-of-mass energy of 7 TeV with an integrated luminosity of 3 pb $^{- 1}$ are presented. We study th…

hep-ex2012

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

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-ex2012

Search for the rare decays Bs -->mumu and Bd -->mumu

LHCb Collaboration, R. Aaij, B. Adeva +542

A search for the decays Bs-->mumu and Bd-->mumu is performed with about 37 pb^{-1} of pp collisions at sqrt{s} = 7 TeV collected by the LHCb experiment at the Large Hadron Collider…

hep-ex2011

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

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-ex2012

Searches for Majorana neutrinos in B- decays

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

Searches for heavy Majorana neutrinos in B- decays in final states containing hadrons plus a Î¼- Î¼- pair have been performed using 0.41/fb of data collected with the LHCb detector…

hep-ex2012

Observation of $J / I ¨ $ pair production in pp collisions at $s = 7 T e V$

LHCb Collaboration, R. Aaij, B. Adeva +567

The production of $J / I ¨ $ pairs in proton-proton collisions at a centre-of-mass energy of 7 TeV has been observed using an integrated luminosity of $37.5 p b^{- 1}$ collected with the…

hep-ex2010

Measurement of sigma(pp -> b anti-b X) at \sqrt(s)=7 TeV in the forward region

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

Decays of b hadrons into final states containing a D0 meson and a muon are used to measure the b anti-b production cross-section in proton-proton collisions at a centre-of-mass ene…

hep-ex2012

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

Measurement of the inclusive phi cross-section in pp collisions at sqrt(s) = 7 TeV

LHCb Collaboration, R. Aaij, B. Adeva +551

The cross-section for inclusive phi meson production in pp collisions at a centre-of-mass energy of sqrt(s) = 7 TeV has been measured with the LHCb detector at the Large Hadron Col…

hep-ex2012

Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi

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

We present a measurement of the time-dependent CP-violating asymmetry in B_s -> J/psi phi decays, using data collected with the LHCb detector at the LHC. The decay time distributio…

hep-ex2012

Evidence for CP violation in time-integrated D0 -> h-h+ decay rates

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

A search for time-integrated CP violation in D0 -> h-h+ (h=K, pi) decays is presented using 0.62 fb^-1 of data collected by LHCb in 2011. The flavor of the charm meson is determine…

hep-ex2020

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

LHCb collaboration, R. Aaij, C. AbellÃ¡n 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

First observation of the decays B0bar -->D+ K- pi+ pi- and B- --> D0 K- pi+ pi-

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

First observations of the Cabibbo suppressed decays B0bar -->D+ K- pi+ pi- and B- --> D0 K- pi+ pi- are reported using 35 pb^{-1} of data collected with the LHCb detector. Their br…

hep-ex2012

First observation of the decay $B^0_s \rightarrow K^{0} \bar{K]^{0}$

LHCb Collaboration, R. Aaij, C. Abellan Beteta +584

The first observation of the decay $\kstarkstar$ is reported using 35\invpb of data collected by LHCb in proton-proton collisions at a centre-of-mass energy of 7 TeV. A total of $4…

hep-ex2011

First observation of Bs -> D_{s2}^{*+} X mu nu decays

LHCb Collaboration, R. Aaij, B. Adeva +586

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 d…

hep-ex2012

Search for the rare decays Bs -> mu+ mu- and B0 -> mu+ mu-

LHCb Collaboration, R. Aaij, C. Abellan Beteta +590

A search for the decays Bs -> mu+ mu- and B0 -> mu+ mu- is performed with 0.37 fb^-1 of pp collisions at sqrt{s} = 7 TeV collected by the LHCb experiment in 2011. The upper limits…

hep-ex2012

Measurement of the CP violating phase Ï_s in Bs->J/Ïf0(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/ÏÏ has been used. Here we report on a measure…

hep-ex2011

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 $B_{d} \to D^{-} K^{+}$ , $B_{d} \to D^{-} I ¨ ^{+}$ and $B_{s} \to D_{s}^{-} I ¨ ^{+}$ produced in 7 TeV $pp$ collisions at the LHC is determined from data…

hep-ex2012

Search for the lepton number violating decays $B^{+} \to I ¨ ^{-} I^¼^{+} I^¼^{+}$ and $B^{+} \to K^{-} I^¼^{+} I^¼^{+}$

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

A search is performed for the lepton number violating decay $B^{+} \to h^{-} I^¼^{+} I^¼^{+}$ , where $h^{-}$ represents a $K^{-}$ or a $I ¨ ^{-}$ , using data from the LHCb detector corresponding to…

hep-ex2012

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

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

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

nucl-ex2017

Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR

CBM Collaboration, T. Ablyazimov, A. Abuhoza +585

Substantial experimental and theoretical efforts worldwide are devoted to explore the phase diagram of strongly interacting matter. At LHC and top RHIC energies, QCD matter is stud…

hep-ex2012

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…

physics.ins-det2021

Ageing studies of Multi-Strip Multi-Gap Resistive Plate Counters based on low resistivity glass electrodes in high irradiation dose

D. Bartos, C. Burducea, I. Burducea +19

Detailed tests and analysis of ageing effects of high irradiation dose on Multi-Strip Multi-Gap Resistive Plate Counters based on low resistivity glass electrodes were performed. M…

hep-ex2011

Measurement of mixing and CP violation parameters in two-body charm decays

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

A study of mixing and indirect CP violation in D0 mesons through the determination of the parameters y_CP and A_Î is presented. The parameter y_CP is the deviation from unity of t…

hep-ex2011

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

LHCb Collaboration, R. Aaij, B. Adeva +543

The production of J/psi mesons in proton-proton collisions at sqrt(s)=7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production…

hep-ex2012

Search for the X(4140) state in B+ to J/psi phi K+ decays

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

A search for the X(4140) state in B+ to J/psi phi K+ decays is performed with 0.37 fb-1 of pp collisions at sqrt(s)=7 TeV collected by the LHCb experiment. No evidence for this sta…

hep-ex2011

Measurement of charged particle multiplicities in $pp$ collisions at $s = 7$ TeV in the forward region

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

The charged particle production in proton-proton collisions is studied with the LHCb detector at a centre-of-mass energy of $s = 7$ TeV in different intervals of pseudorapid…

hep-ex2012

Differential branching fraction and angular analysis of the decay $B^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$

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

The angular distributions and the partial branching fraction of the decay $B^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$ are studied using an integrated luminosity of $0.37 f b^{- 1}$ of data…

hep-ex2012

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

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

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

hep-ex2012

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-ex2011

Search for CP violation in $D^{+} \to K^{-} K^{+} I ¨ ^{+}$ decays

LHCb Collaboration, R. Aaij, B. Adeva +573

A model-independent search for direct CP violation in the Cabibbo suppressed decay $D^{+} \to K^{-} K^{+} I ¨ ^{+}$ in a sample of approximately 370,000 decays is carried out. The data were c…

hep-ex2012

Observation of X(3872) production in pp collisions at sqrt(s)= 7 TeV

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

Using 34.7 pb-1 of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at sqrt(s) = 7 TeV is observed for the first time. Candidat…

hep-ex2011

First observation of Bs -> J/psi f0(980) decays

The LHCb Collaboration, R. Aaij, B. Adeva +545

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay Bs -> J/psi f0(980) is observed. This CP eigenstate…

hep-ex2012

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-ex2010

Prompt K_short production in pp collisions at sqrt(s)=0.9 TeV

LHCb Collaboration, R. Aaij, C. Abellan Beteta +627

The production of K_short mesons in pp collisions at a centre-of-mass energy of 0.9 TeV is studied with the LHCb detector at the Large Hadron Collider. The luminosity of the analys…

hep-ex2012

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-ex2011

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

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

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

hep-ex2012

Absolute luminosity measurements with the LHCb detector at the LHC

The LHCb Collaboration, R. Aaij, B. Adeva +571

Absolute luminosity measurements are of general interest for colliding-beam experiments at storage rings. These measurements are necessary to determine the absolute cross-sections…

hep-ex2011

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

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

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

hep-ex2010

Roadmap for selected key measurements of LHCb

The LHCb Collaboration, B. Adeva, M. Adinolfi +509

Six of the key physics measurements that will be made by the LHCb experiment, concerning CP asymmetries and rare B decays, are discussed in detail. The "road map" towards the preci…

hep-ex2012

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…

Publications (42)

Measurement of b hadron production fractions in 7 TeV pp collisions

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

Measurement of b-hadron masses

Search for the rare decays Bs -->mumu and Bd -->mumu

First observation of the decay Bˉs0​→D0K∗0 and a measurement of the ratio of branching fractions B(Bˉ0→D0I¨0)B(Bˉs0​→D0K∗0)​

Searches for Majorana neutrinos in B- decays

Observation of J/I¨ pair production in pp collisions at s​=7TeV

Measurement of sigma(pp -> b anti-b X) at \sqrt(s)=7 TeV in the forward region

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

Measurement of the inclusive phi cross-section in pp collisions at sqrt(s) = 7 TeV

Measurement of the CP-violating phase phi_s in the decay Bs->J/psi phi

Evidence for CP violation in time-integrated D0 -> h-h+ decay rates

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

First observation of the decays B0bar -->D+ K- pi+ pi- and B- --> D0 K- pi+ pi-

First observation of the decay $B^0_s \rightarrow K^{*0} \bar{K]^{*0}$

First observation of Bs -> D_{s2}^{*+} X mu nu decays

Search for the rare decays Bs -> mu+ mu- and B0 -> mu+ mu-

Measurement of the CP violating phase Ï_s in Bs->J/Ïf0(980)

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

Search for the lepton number violating decays B+→I¨−I^¼+I^¼+ and B+→K−I^¼+I^¼+

Observation of Bs -> J/Ïf'2(1525) in J/ÏK+K- final states

Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR

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

Ageing studies of Multi-Strip Multi-Gap Resistive Plate Counters based on low resistivity glass electrodes in high irradiation dose

Measurement of mixing and CP violation parameters in two-body charm decays

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

Search for the X(4140) state in B+ to J/psi phi K+ decays

Measurement of charged particle multiplicities in pp collisions at s​=7TeV in the forward region

Differential branching fraction and angular analysis of the decay B0→K∗0I^¼+I^¼−

Measurement of the cross-section ratio I¨(I¨c2​)/I¨(I¨c1​) for prompt I¨c​ production at s​=7 TeV

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

Search for CP violation in D+→K−K+I¨+ decays

Observation of X(3872) production in pp collisions at sqrt(s)= 7 TeV

First observation of Bs -> J/psi f0(980) decays

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

Prompt K_short production in pp collisions at sqrt(s)=0.9 TeV

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

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

Absolute luminosity measurements with the LHCb detector at the LHC

Measurements of the Branching fractions for B(​s)−>D(​s)I¨I¨I¨ and I^b0​−>I^c+​I¨I¨I¨

Roadmap for selected key measurements of LHCb

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

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

Observation of $J / I ¨ $ pair production in pp collisions at $s = 7 T e V$

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

First observation of the decay $B^0_s \rightarrow K^{0} \bar{K]^{0}$

Measurement of the CP violating phase Ï_s in Bs->J/Ïf0(980)

Search for the lepton number violating decays $B^{+} \to I ¨ ^{-} I^¼^{+} I^¼^{+}$ and $B^{+} \to K^{-} I^¼^{+} I^¼^{+}$

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

Measurement of charged particle multiplicities in $pp$ collisions at $s = 7$ TeV in the forward region

Differential branching fraction and angular analysis of the decay $B^{0} \to K^{* 0} I^¼^{+} I^¼^{-}$

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

Search for CP violation in $D^{+} \to K^{-} K^{+} I ¨ ^{+}$ decays

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

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