Observation of the decay Λb 0→Λc +pp‾π−
- Aaij, R.
- Adeva, B.
- Adinolfi, M.
- Ajaltouni, Z.
- Akar, S.
- Albicocco, P.
- Albrecht, J.
- Alessio, F.
- Alexander, M.
- Alfonso Albero, A.
- Ali, S.
- Alkhazov, G.
- Alvarez Cartelle, P.
- Alves, A. A.
- Amato, S.
- Amerio, S.
- Amhis, Y.
- An, L.
- Anderlini, L.
- Andreassi, G.
- Andreotti, M.
- Andrews, J. E.
- Appleby, R. B.
- Archilli, F.
- d'Argent, P.
- Arnau Romeu, J.
- Artamonov, A.
- Artuso, M.
- Aslanides, E.
- Atzeni, M.
- Auriemma, G.
- Bachmann, S.
- Back, J. J.
- Baker, S.
- Balagura, V.
- Carvalho Akiba, K.
- Coco, V.
- De Bruyn, K.
- Ferro-Luzzi, M.
- Ketel, T.
- Merk, M.
- Onderwater, C. J.G.
- Raven, G.
- Schiller, M.
- Serra, N.
- Storaci, B.
- Syropoulos, V.
- van Tilburg, J.
- Tolk, S.
- Tuning, N.
DOIAbstract
The decay Λb 0→Λc +pp‾π− is observed using pp collision data collected with the LHCb detector at centre-of-mass energies of s=7 and 8 Tev, corresponding to an integrated luminosity of 3 fb−1. The ratio of branching fractions between Λb 0→Λc +pp‾π− and Λb 0→Λc +π− decays is measured to be [Formula presented]=0.0540±0.0023±0.0032. Two resonant structures are observed in the Λc +π− mass spectrum of the Λb 0→Λc +pp‾π− decays, corresponding to the Σc(2455)0 and Σc ⁎(2520)0 states. The ratios of branching fractions with respect to the decay Λb 0→Λc +pp‾π− are [Formula presented]=0.089±0.015±0.006,[Formula presented]=0.119±0.020±0.014. In all of the above results, the first uncertainty is statistical and the second is systematic. The phase space i...
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