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Published November 9, 2010 | Version Published
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Correlated leading baryon-antibaryon production in e^+e^- → c^c̅ → Λ^+_c^ Λ̅ ^-_c X

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Abstract

We present a study of 649 ± 35 e^+e^- → cc̅ events produced at √s ≈ 10:6 GeV containing both a Λ^+_c baryon and a Λ̅ -_c antibaryon. The number observed is roughly 4 times that expected if the leading charmed hadron types are uncorrelated, confirming an observation by the CLEO Collaboration. We find a 2-jet topology in these events but very few additional baryons, demonstrating that the primary c and c̅ are predominantly contained in a correlated baryon-antibaryon system. In addition to the charmed baryons we observe on average 2:6 ± 0:2 charged intermediate mesons, predominantly pions, carrying 65% of the remaining energy.

Additional Information

© 2010 The American Physical Society. Received 15 June 2010; published 9 November 2010. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), and STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation.

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Additional details

Identifiers

Eprint ID
21761
Resolver ID
CaltechAUTHORS:20110114-081749913

Funding

Department of Energy (DOE)
NSF
Natural Sciences and Engineering Research Council (NSERC)(Canada)
Commissariat à l'Energie Atomique (CEA) (France)
Centre National de la Recherche Scientifique (CNRS) (France)
Bundesministerium fur Bildung und Forschung (BMBF) (Germany)
German Deutsche Forschungsgemeinschaft (DFG) (Germany)
Istituto Nazionale di Fisica Nucleare (INFN) (Italy)
Foundation for Fundamental Research on Matter (FOM) (The Netherlands)
Research Council of Norway (NFR)
Ministry of Education and Science of the Russian Federation (MES)
Ministerio de Educacion y Ciencia (MEC) (SPAIN)
Science and Technology Facilities Council (STFC) (UK)
Marie Curie EIF (European Union)
A. P. Sloan Foundation

Dates

Created
2011-01-14
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field