Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/175079
Title: Isospin Amplitudes in Lambda(0)(b) -> J/psi Lambda (Sigma(0)) and Xi(0)(b)-> J/psi Xi(0) (Lambda) Decays
Author: Alfonso Albero, Alejandro
Calvo Gómez, Míriam
Camboni, Alessandro
Coquereau, Samuel
Garrido Beltrán, Lluís
Gascón Fora, David
Gironella Gironell, Pere
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Manera Escalero, R.
Vázquez Gómez, Ricard
Vilasis-Cardona, Xavier
Alkhazov, G.
LHCb Collaboration
Keywords: Gran Col·lisionador d'Hadrons
Barions
Large Hadron Collider (France and Switzerland)
Baryons
Issue Date: 17-Mar-2020
Publisher: American Physical Society
Abstract: Ratios of isospin amplitudes in hadron decays are a useful probe of the interplay between weak and strong interactions and allow searches for physics beyond the standard model. We present the first results on isospin amplitudes in b-baryon decays, using data corresponding to an integrated luminosity of 8.5  fb−1, collected with the LHCb detector in pp collisions at center of mass energies of 7, 8, and 13 TeV. The isospin amplitude ratio |A1(Λ0b→J/ψΣ0)/A0(Λ0b→J/ψΛ)|, where the subscript on A indicates the final-state isospin, is measured to be less than 1/21.8 at 95% confidence level. The Cabibbo suppressed Ξ0b→J/ψΛ decay is observed for the first time, allowing for the measurement |A0(Ξ0b→J/ψΛ)/A1/2(Ξ0b→J/ψΞ0)|=0.37±0.06±0.02, where the uncertainties are statistical and systematic, respectively.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.124.111802
It is part of: Physical Review Letters, 2020, vol. 124, num. 11, p. 111802
URI: http://hdl.handle.net/2445/175079
Related resource: https://doi.org/10.1103/PhysRevLett.124.111802
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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