Observation of inclusive B meson decays into $\Lambda{_c^+}$ Baryons

Albrecht, H.; Coppage, D.; Gorelov, I.; McKenna, J. A.; Fernholz, R. C.; Schröder, H.; Childers, R.; Harder, G.; ARGUS Collaboration; Kapitza, H.; Schulz, H. D.; Schweda, G.; Ball, S.; Krüger, A.; Tchistilin, V.; Parsons, J. A.; Soloshenko, V.; Prentice, J. D.; Stiewe, J.; Wurth, R.; Gingrich, D. M.; Gabriel, J. C.; Schubert, K. R.; Ryltsov, V.; Seywerd, H. C. J.; Križan, P.; Spaan, B.; Semenov, A.; Drescher, A.; Swain, J. D.; Macfarlane, D. B.; Padley, P.; Davis, R.; Danilov, M.; Edwards, K. W.; Tsipolitis, G.; Fominykh, B.; Boštjančič, B.; Matveev, V.; Scheck, H.; Wegener, D.; Appuhn, R. D.; Matthiesen, U.; Lubimov, V.; Babaev, A.; Werner, S.; Kolanoski, H.; Darden, C. W.; Strahl, K.; Frisken, W. R.; Nilsson, A. W.; Yun, J. C.; Nippe, A.; Yagil, A.; Kutschke, R.; Sefkow, F.; Kwak, N.; Schäfer, M.; Kim, P. C. H.; Walther, A.; Shevchenko, V.; Böckmann, P.; Patel, P. M.; Gilkinson, D. J.; Golutvin, A.; Orr, R. S.; Waldi, R.; Jönsson, L.; Ammar, R.; Kanekal, S.; Zaitsev, Yu.; McLean, K. W.; Yoon, T.-S.; Kernel, G.; Schmidt-Parzefall, W.; Kamp, D.; Tichomirov, I.; Spengler, J.; Gläser, R.; Ruf, T.

Report

PUBDB-2022-06915

Observation of inclusive B meson decays into $\Lambda{_c^+}$ Baryons

Albrecht, H. ; Böckmann, P. ; Gläser, R. ; Harder, G. ; Krüger, A. ; Nippe, A. ; Schäfer, M. ; Schmidt-Parzefall, W. ; Schröder, H. ; Schulz, H. D. ; Sefkow, F. ; Spengler, J. ; Wurth, R. ; Yagil, A. ; Appuhn, R. D. ; Drescher, A. ; Kamp, D. ; Kolanoski, H. ; Matthiesen, U. ; Scheck, H. ; Schweda, G. ; Spaan, B. ; Walther, A. ; Wegener, D. ; Gabriel, J. C. ; Ruf, T. ; Schubert, K. R. ; Stiewe, J. ; Strahl, K. ; Waldi, R. ; Werner, S. ; Edwards, K. W. ; Frisken, W. R. ; Gilkinson, D. J. ; Gingrich, D. M. ; Kapitza, H. ; Kim, P. C. H. ; Kutschke, R. ; Macfarlane, D. B. ; McKenna, J. A. ; McLean, K. W. ; Nilsson, A. W. ; Orr, R. S. ; Padley, P. ; Parsons, J. A. ; Patel, P. M. ; Prentice, J. D. ; Seywerd, H. C. J. ; Swain, J. D. ; Tsipolitis, G. ; Yoon, T.-S. ; Yun, J. C. ; Ammar, R. ; Ball, S. ; Coppage, D. ; Davis, R. ; Kanekal, S. ; Kwak, N. ; Boštjančič, B. ; Kernel, G. ; Križan, P. ; Jönsson, L. ; Babaev, A. ; Danilov, M. ; Fominykh, B. ; Golutvin, A. ; Gorelov, I. ; Lubimov, V. ; Matveev, V. ; Ryltsov, V. ; Semenov, A. ; Shevchenko, V. ; Soloshenko, V. ; Tchistilin, V. ; Tichomirov, I. ; Zaitsev, Y. ; Childers, R. ; Darden, C. W. ; Fernholz, R. C. ; ARGUS Collaboration

1988

4 pp. (1988) [10.3204/PUBDB-2022-06915]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2022-06915

Report No.: DESY-88-012

Abstract: We report the first direct observation of B meson decays into Λc+ baryons using the decay channel Λc+ --> pK-π+. The product of branching ratios Br(B-->Λc+X).Br(Λc+-->pK-π+ = (0.30+/-0.12+/-0.06)% is derived from an observed signal of 208+/-89 events. Using previous measurements of inclusive baryon rates we find a branching ratio for Λc+ --> pK-π+ of (4.1+/-2.4)%. The measured Λ${_c^+} $momentum spectrum indicates that the multi-particle final states dominate the decay B-->Λc+X.

Keyword(s): ELECTRON POSITRON: COLLIDING BEAMS ; COLLIDING BEAMS: ELECTRON POSITRON ; ELECTRON POSITRON: ANNIHILATION ; ANNIHILATION: ELECTRON POSITRON ; UPSILON(10570): ELECTROPRODUCTION ; ELECTROPRODUCTION: UPSILON(10570) ; B: PAIR PRODUCTION ; PAIR PRODUCTION: B ; B: DECAY ; DECAY: B ; LAMBDA/C+: NONLEPTONIC DECAY ; NONLEPTONIC DECAY: LAMBDA/C+ ; B: BRANCHING RATIO ; MOMENTUM SPECTRUM: (LAMBDA/C+) ; MASS SPECTRUM: (P K- PI+) ; (P K- PI+): MASS SPECTRUM ; ARGUS ; EXPERIMENTAL RESULTS ; DESY DORIS II STOR ; B --> LAMBDA/C+ ANYTHING ; LAMBDA/C+ --> P K- PI+ ; APPROX. 10.6 GEV-CMS ; S049.115