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Correlated leading baryon-antibaryon production in e^+e^- → c^c̅ → Λ^+_c^ Λ̅ ^-_c X

Aubert, B. and Cheng, C. H. and Doll, D. A. and Echenard, B. and Fang, F. and Hitlin, D. G. and Narsky, I. and Ongmongkolkul, P. and Piatenko, T. and Porter, F. C. (2010) Correlated leading baryon-antibaryon production in e^+e^- → c^c̅ → Λ^+_c^ Λ̅ ^-_c X. Physical Review D, 82 (9). Art. No. 091102. ISSN 2470-0010.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Cheng, C. H.0000-0002-8382-0447
Hitlin, D. G.0000-0003-4028-6982
Porter, F. C.0000-0003-1948-8889
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.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Natural Sciences and Engineering Research Council (NSERC)(Canada)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA) (France)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS) (France)UNSPECIFIED
Bundesministerium fur Bildung und Forschung (BMBF) (Germany)UNSPECIFIED
German Deutsche Forschungsgemeinschaft (DFG) (Germany)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN) (Italy)UNSPECIFIED
Foundation for Fundamental Research on Matter (FOM) (The Netherlands)UNSPECIFIED
Research Council of Norway (NFR)UNSPECIFIED
Ministry of Education and Science of the Russian Federation (MES)UNSPECIFIED
Ministerio de Educacion y Ciencia (MEC) (SPAIN)UNSPECIFIED
Science and Technology Facilities Council (STFC) (UK)UNSPECIFIED
Marie Curie EIF (European Union)UNSPECIFIED
A. P. Sloan FoundationUNSPECIFIED
Issue or Number:9
Classification Code:PACS: 13.66.Bc, 13.60.Rj, 13.87.Fh
Record Number:CaltechAUTHORS:20110114-081749913
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21761
Deposited By: Benjamin Perez
Deposited On:14 Jan 2011 18:12
Last Modified:09 Mar 2020 13:18

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