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Publications associées (30)

Observation of a Narrow Pentaquark State, P-c(4312)(+), and of the Two-Peak Structure of the P-c(4450)(+)

Olivier Schneider, Aurelio Bay, Yiming Li, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Michel De Cian, Elena Graverini, Matthieu Philippe Luther Marinangeli, Luca Pescatore, François Fleuret, Pietro Marino, Federico Leo Redi, Chitsanu Khurewathanakul, Violaine Bellée, Maria Vieites Diaz, Renato Quagliani, Pavol Stefko, Federico Betti, Tara Nanut, Vladimir Macko, Aravindhan Venkateswaran, Guillaume Max Pietrzyk, Luis Miguel Garcia Martin, Surapat Ek-In, Vitalii Lisovskyi, Katharina Müller, Veronica Sølund Kirsebom, Jian Wang, Mingkui Wang, Zhirui Xu, Yi Zhang, Lei Zhang, Ho Ling Li, Mark Tobin, Minh Tâm Tran, Niko Neufeld, Matthew Needham, Marc-Olivier Bettler, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Measurement of b hadron fractions in 13 TeV pp collisions

Olivier Schneider, Aurelio Bay, Yiming Li, Guido Haefeli, Frédéric Blanc, Christoph Frei, Tatsuya Nakada, François Fleuret, Mingkui Wang, Yi Zhang, Michel De Cian, Liang Sun, Luca Pescatore, Ian William Marison, Jorge Miguel Dias Almeida Rodrigues Soares, Elena Graverini, Chitsanu Khurewathanakul, Michael Thompson McCann, Achille Mauri, Renato Quagliani, Valérie Jeanne Thérèse Renaudin-Schouler, Federico Betti, Juan Federico Esteban Müller, Craig Matthew Smith, Aravindhan Venkateswaran, Vitalii Lisovskyi, Katharina Müller, Veronica Sølund Kirsebom, Jian Wang, Zhirui Xu, Lei Zhang, Jessica Prisciandaro, Mark Tobin, Minh Tâm Tran, Niko Neufeld, Matthew Needham, Marc-Olivier Bettler, Greig Alan Cowan, Maurizio Martinelli, Vladislav Balagura, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Design and performance of the LHCb trigger and full real-time reconstruction in Run 2 of the LHC

Michel De Cian, Yiming Li, Maurizio Martinelli, Elisabeth Maria Niel, Mingkui Wang, Zhirui Xu, Yi Zhang, Jessica Prisciandaro, Niko Neufeld, Donal Patrick Hill, Hang Yin, Yao Zhou, Gerhard Raven, Paolo Durante, Luis Alberto Granado Cardoso

The LHCb collaboration has redesigned its trigger to enable the full offline detector reconstruction to be performed in real time. Together with the real-time alignment and calibration of the detector, and a software infrastructure to make persistent the h ...

2019

Lepton Flavour Violation searches and scintillating fibre tracker testing in LHCb

Guido Andreassi

This thesis presents new results on searches for lepton-flavour-violating particle decays, performed in the LHCb experiment at CERN. Two analyses are discussed in detail. The first one concerns the B(s,d)->e mu decay. No evidence of signal is observed and ...

EPFL2019

Direct photon production at LHCb

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Frédéric Blanc, Tatsuya Nakada, Michel De Cian, Luca Pescatore, Chitsanu Khurewathanakul, François Fleuret, Matthieu Philippe Luther Marinangeli, Minh Tâm Tran, Elena Graverini, Pietro Marino, Sebastiana Gianì, Renato Quagliani, Federico Leo Redi, Federico Betti, Plamen Hristov Hopchev, Maxime Schubiger, Aravindhan Venkateswaran, Guido Andreassi, Luis Miguel Garcia Martin, Violaine Bellée, Vitalii Lisovskyi, Axel Kuonen, Jian Wang, Mingkui Wang, Preema Rennee Pais, Zhirui Xu, Pavol Stefko, Yi Zhang, Tara Nanut, Maria Elena Stramaglia, Lei Zhang, Vladimir Macko, Jessica Prisciandaro, Guillaume Max Pietrzyk, Lino Ferreira Lopes, Mark Tobin, Ana Bárbara Rodrigues Cavalcante, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

A bb(b)over-bar(b)over-bar di-bottomonium at the LHC?

Angelo Esposito

We study the case of a di-bottomonium bb (b) over bar(b) over bar particle at the LHC. Its mass and decay width are obtained within a new model of diquark-antidiquark interactions in tetraquarks. The same model solves several open problems on the phenomeno ...

SPRINGER2018

Search for beautiful tetraquarks in the ?(1S)(+-) invariant-mass spectrum

Olivier Schneider, Aurelio Bay, Guido Haefeli, Christoph Frei, Tatsuya Nakada, Frédéric Blanc, Michel De Cian, Luca Pescatore, François Fleuret, Chitsanu Khurewathanakul, Alessio Ferrari, Basile Schäli, Elena Graverini, Matthieu Philippe Luther Marinangeli, Jessica Prisciandaro, Renato Quagliani, Mark Tobin, Federico Betti, Greig Alan Cowan, Vladislav Balagura, Aravindhan Venkateswaran, Pietro Marino, Luis Miguel Garcia Martin, Mirco Dorigo, Vitalii Lisovskyi, Sebastiana Gianì, Jian Wang, Mingkui Wang, Federico Leo Redi, Maxime Schubiger, Zhirui Xu, Guido Andreassi, Yi Zhang, Violaine Bellée, Lei Zhang, Preema Rennee Pais, Pavol Stefko, Tara Nanut, Minh Tâm Tran, Tommaso Colombo, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Refining and testing 12,000 km of scintillating plastic fibre for the LHCb SciFi tracker

The LHCb Collaboration is constructing a large scintillating fibre tracker for a major upgrade of the experiment during the LHC long shutdown LS2 scheduled for 2019-2020. The detector is based on blue emitting Kuraray SCSF-78MJ fibres of 0.25 mm diameter, ...

2018

Measurement of the time-integrated CP asymmetry in D (0) -> K (S) (0) K (S) (0) decays

Measurement of cos 2 beta in B-0 -> D((*))h(0) with D -> K-S(0)pi(+) pi(-) decays by a combined time-dependent Dalitz plot analysis of BABAR and Belle data

Olivier Schneider, Roberto Gargiani, Yiming Li, Mingkui Wang, Mithilesh Nayak, Chao Wang, Gaétan Charles Antoine Giriat, Tagir Aushev, Greig Alan Cowan, Sun Hee Kim, Liang Sun, Tara Nanut, Aaron James Rossini, Marilisa Neri, Songmei Wu, Alexandra Bondarenko, Arnaud Michel Gelb, Jun Yong Kim, Taoufiq Harach, John Wilson, Yong Chan Choi, Ji Hyun Kim, Lorenzo Vitale, Donghyun Kim, Amaury Robert Dame, Armend Gazmeno Hati, Gerhard Raven, Martin Lubej, Jiayun Shen, Lei Li, François Bianchi

We report measurements of sin 2 beta and cos 2 beta using a time-dependent Dalitz plot analysis of B-0 -> D((*))h(0) with D -> K-S(0)pi(+)pi(-) decays, where the light unflavored and neutral hadron h(0) is a pi(0),eta, or omega meson. The analysis uses a c ...

American Physical Society2018

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Plamen Hristov Hopchev

Maria Elena Stramaglia

A narrow pentaquark state, P-c(4312)(+), decaying to J/psi p, is discovered with a statistical significance of 7.3 sigma in a data sample of Lambda(0)(b) -> J/psi pK(-) decays, which is an order of magnitude larger than that previously analyzed by the LHCb ...

2019

Plamen Hristov Hopchev

Maria Elena Stramaglia

Tommaso Colombo

Vladimir Macko

Guillaume Max Pietrzyk

The production fractions of (B) over bar (0)(s) and Lambda(0)(b) hadrons, normalized to the sum of B- and (B) over bar (0) fractions, arc measured in 13 TeV pp collisions using data collected by the LHCb experiment, corresponding to an integrated luminosit ...

American Physical Society2019

At small Bjorken-x, the large gluon number density in the nucleon leads to gluon recombination competing with gluon splitting, which could result in saturation of the gluon PDF. This gluon saturation has yet to be conclusively observed. Direct photon produ ...

2019

Niko Neufeld

Vladimir Macko

Matthew Needham

Guillaume Max Pietrzyk

Michael Thompson McCann

Jean Wicht

Adriano Pastore

Léonard Yannick Maurice Eymann

Xiaoxue Han

Nathalie Sophie Adeline Serra

Plamen Hristov Hopchev

Sattar Akbari Nakhjavani

Valérie Jeanne Thérèse Renaudin-Schouler

Thomas Jean Julien Fussinger

Juan Federico Esteban Müller

Maria Elena Stramaglia

The (1 S) invariant-mass distribution is investigated for a possible exotic meson state composed of two b quarks and two b quarks, X bbbb. The analysis is based on a data sample of pp collisions recorded with the LHCb detector at centre-of-mass energies s ...

Springer Nature2018

Niko Neufeld

Vladimir Macko

Matthew Needham

Guillaume Max Pietrzyk

Michael Thompson McCann

Jean Wicht

Adriano Pastore

Léonard Yannick Maurice Eymann

Xiaoxue Han

Nathalie Sophie Adeline Serra

Plamen Hristov Hopchev

Sattar Akbari Nakhjavani

Valérie Jeanne Thérèse Renaudin-Schouler

Thomas Jean Julien Fussinger

Juan Federico Esteban Müller

Maria Elena Stramaglia

Luis Alberto Granado Cardoso

Daniel Hugo Cámpora Pérez

A measurement of the time-integrated CP asymmetry in D (0) -> K (S) (0) K (S) (0) decays is reported. The data correspond to an integrated luminosity of about 2 fb(-1) collected in 2015-2016 by the LHCb collaboration in pp collisions at a centre-of-mass en ...

Springer Nature2018