Measurement of the branching ratio Gamma(Lambda0b->psi(2S)Lambda0)/Gamma(Lambda0b->J/psiLambda0) with the ATLAS detector

Abstract

An observation of the Lambda0b->psi(2S)Lambda0 decay and a comparison of its branching fraction with that of the Lambda0b->J/psiLambda0 decay has been made with the ATLAS detector in proton--proton collisions at sqrt(s)=8TeV at the LHC using an integrated luminosity of 20.6fb-1. The J/? and ?(2S) mesons are reconstructed in their decays to a muon pair, while the ?0?pp- decay is exploited for the ?0 baryon reconstruction. The ?0b baryons are reconstructed with transverse momentum pT>10GeV and pseudorapidity |eta|<2.1. The measured branching ratio of the Lambda0b->psi(2S)Lambda0 and Lambda0b->J/psiLambda0 decays is G(?0b??(2S)?0)/G(?0b?J/??0)=0.501±0.033(stat)±0.019(syst), lower than the expectation from the covariant quark model.


Tutti gli autori

  • Aad G. , Chiodini G. , Gorini E. , Primavera M. , Spagnolo S. , Ventura A.

Titolo volume/Rivista

PHYSICS LETTERS. SECTION B


Anno di pubblicazione

2015

ISSN

0370-2693

ISBN

Non Disponibile


Numero di citazioni Wos

3

Ultimo Aggiornamento Citazioni

28/04/2018


Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile


Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile