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Géraldine Conti

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Publications associées (27)

Measurement of the cross-section ratio sigma(chi(c2))/sigma(chi(c1)) for prompt chi(c) production at root s=7 TeV LHCb Collaboration

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Julien Rouvinet, Michel De Cian, Barinjaka Rakotomiaramanana, Christophe Salzmann

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 root s = 7 TeV. The chi(c) mesons are identified through their decays chi(c) -> J/psi ...

Elsevier2012

Measurements of the branching fractions for B(s) -> D(s) pi pi pi and Lambda_b -> Lambda_c+ pi pi pi

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Julien Rouvinet, Michel De Cian, Barinjaka Rakotomiaramanana, Raluca Anca Muresan

Branching fractions of the decays H-b -> H-c pi(-)pi(+)pi(-) relative to H-b -> H-c pi(-) are presented, where H-b (H-c) represents (B) over bar (0) (D+), B-(D-0), (B) over bar (0)(s) (D-s(+)), and Lambda(0)(b) (Lambda(+)(c)). The measurements are performe ...

American Physical Society2011

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

Olivier Schneider, Yiming Li, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Christoph Frei, Tatsuya Nakada, Julien Rouvinet, Barinjaka Rakotomiaramanana, Michel De Cian

The production of J/psi mesons in proton-proton collisions at root s = 7 TeV is studied with the LHCb detector at the LHC. The differential cross-section for prompt J/psi production is measured as a function of the J/psi transverse momentum p(T) and rapidi ...

2011

First observation of Bs0 -> J/psi f0(980) decays

Olivier Schneider, Yiming Li, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Christoph Frei, Tatsuya Nakada, Julien Rouvinet, Barinjaka Rakotomiaramanana, Michel De Cian

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the hadronic decay B-s(0) -> J/psi f(0)(980) is observed. This CP eigenstate mode could be used to measure mixing-induced CP violation in the B? sy ...

2011

Performance of the LHCb Silicon Tracker in p-p Collisions at the LHC

Olivier Schneider, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Tatsuya Nakada, Michel De Cian, Raluca Anca Muresan, Johan Luisier, Christophe Salzmann, Mark Tobin

The Large Hadron Collider beauty experiment (LHCb) is a single-arm forward spectrometer dedicated to the study of B-meson decays in p - p collisions at the Large Hadron Collider (LHC). The LHCb detector has excellent tracking and particle identification ca ...

Ieee2011

First observation of (B)over-bar(s)(0) -> D-s2*X+mu(-)(nu)over-bar decays

Olivier Schneider, Yiming Li, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Christoph Frei, Tatsuya Nakada, Julien Rouvinet, Barinjaka Rakotomiaramanana, Michel De Cian

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays (B) over bar (0)(s) -> D+X mu(-)(nu) over bar and (B) over bar (0)(s) -> (DK+X)-K-0 mu(-)(nu) over bar are detected. Two st ...

2011

Determination of f(s)/f(d) for 7 TeV pp Collisions and Measurement of the B-0 -> D-K+ Branching Fraction

Olivier Schneider, Yiming Li, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Christoph Frei, Tatsuya Nakada, Julien Rouvinet, Barinjaka Rakotomiaramanana, Michel De Cian

The relative abundance of the three decay modes B-0 -> D-K+, B-0 -> D-pi(+), and B-s(0) -> D-s(-)pi(+) produced in 7 TeV pp collisions at the LHC is determined from data corresponding to an integrated luminosity of 35 pb(-1). The branching fraction of B-0 ...

2011

Measurement of V0 production ratios in pp collisions at sqrt(s)=0.9 and 7 TeV

Olivier Schneider, Yiming Li, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Christoph Frei, Tatsuya Nakada, Julien Rouvinet, Barinjaka Rakotomiaramanana, Raluca Anca Muresan

The (Lambda) over bar/Lambda and (Lambda) over bar /K-S(0) production ratios are measured by the LHCb detector from 0.3 nb(-1) of pp collisions delivered by the LHC at root s = 0.9TeV and 1.8 nb-1 at root s = 7TeV. Both ratios are presented as a function o ...

Springer Nature2011

First observation of the decay (B)over-bar(S)(0) -> (DK)-K-0(0) and a measurement of the ratio of branching fractions B((B)over-bar(S)(0)->(DK)-K-0(0))/B((B)over-bar(0)-> D-0 rho(0))

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Julien Rouvinet, Michel De Cian, Barinjaka Rakotomiaramanana, Raluca Anca Muresan

The first observation of the decay (B) over bar (0)(S) -> (DK)-K-0*(0) using pp data collected by the LHCb detector at a centre-of-mass energy of 7 TeV, corresponding to an integrated luminosity of 36 pb(-1), is reported. A signal of 34.4 +/- 6.8 events is ...

2011

Search for CP violation in D+ -> K- K+ pi(+) decays

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Julien Rouvinet, Michel De Cian, Barinjaka Rakotomiaramanana, Raluca Anca Muresan

A model-independent search for direct CP violation in the Cabibbo-suppressed decay D+ -> K- K+ pi(+) in a sample of approximately 370 000 decays is carried out. The data were collected by the LHCb experiment in 2010 and correspond to an integrated luminosi ...

American Physical Society2011

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Measurements of the branching fractions for B(s) -> D(s) pi pi pi and Lambda_b -> Lambda_c+ pi pi pi

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Julien Rouvinet, Michel De Cian, Barinjaka Rakotomiaramanana, Raluca Anca Muresan

American Physical Society2011

First observation of Bs0 -> J/psi f0(980) decays

Olivier Schneider, Yiming Li, Aurelio Bay, Guido Haefeli, Frédéric Blanc, Christoph Frei, Tatsuya Nakada, Julien Rouvinet, Barinjaka Rakotomiaramanana, Michel De Cian

2011

Measurement of the cross-section ratio sigma(chi(c2))/sigma(chi(c1)) for prompt chi(c) production at root s=7 TeV LHCb Collaboration

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Julien Rouvinet, Michel De Cian, Barinjaka Rakotomiaramanana, Christophe Salzmann

Elsevier2012

First observation of the decay (B)over-bar(S)(0) -> (DK)-K-0(0) and a measurement of the ratio of branching fractions B((B)over-bar(S)(0)->(DK)-K-0(0))/B((B)over-bar(0)-> D-0 rho(0))

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Julien Rouvinet, Michel De Cian, Barinjaka Rakotomiaramanana, Raluca Anca Muresan

2011

Search for CP violation in D+ -> K- K+ pi(+) decays

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Julien Rouvinet, Michel De Cian, Barinjaka Rakotomiaramanana, Raluca Anca Muresan

American Physical Society2011