Search for exclusive decays of the Lambda_b baryon at LEP-1
Abstract
Description
A search for fully reconstructed Lambda_b baryons was performed, using about 3.5x10^6 hadronic Z0 decays acquired by the DELPHI detector at LEP-1. Two event candidates were found in the colour-suppressed decay channel J/psi Lambda, and four in the colour-allowed channels Lambda_c pi/a1, with an estimated background of 0.25 and 1.05 events, respectively. Measurements of the Lambda_b mass yield (5612.1 +- 21.2 +- 6.0) MeV and (5610 +- 24 +- 16) MeV, respectively, and are consistent with the world average value of PDG.
Poster THAP02 presented at the XXII Physics in Collision Conference (PIC'02), Stanford, CA, USA, 20-22 June 2002; 3 pages, LaTeX, no figures. This paper has been withdrawn by the author following a request by the spokesman of the DELPHI collaboration
Poster THAP02 presented at the XXII Physics in Collision Conference (PIC'02), Stanford, CA, USA, 20-22 June 2002; 3 pages, LaTeX, no figures. This paper has been withdrawn by the author following a request by the spokesman of the DELPHI collaboration