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Charmed baryon spectroscopy and decays

Charmed baryon spectroscopy and decays

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Charmed baryon spectroscopy and decays

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  1. Charmed baryon spectroscopy and decays Section Editors BaBar: Mat Charles Belle: Roman Mizuk Theory: (not assigned) B-factories Legacy Book Meeting SLAC, Oct 30-31

  2. Papers (detail on next slides) • BaBar • Published • 1) Phys.Rev.D72:052006,2005 • 2) Phys.Rev.Lett.98:012001,2007 • 3) Phys.Rev.D78:112003,2008 • 4) Phys.Rev.D77:012002,2008 • 5) Phys.Rev.D77:031101,2008 • 6) Phys.Rev.Lett.97:232001,2006 • 7) Phys.Rev.D74:011103,2006 • 8) Phys.Rev.D75:052002,2007 • 9) Phys.Rev.Lett.95:142003,2005. • 10) Phys.Rev.Lett.99:062001,2007 • 11) Phys.Rev.Lett.97:112001,2006 • 12) Phys.Rev.D78:034008,2008 • Foreseen papers in time to be • included in the book: • Xic’ mass & spin • Xi(1690) in Lc decays Belle Published 1) Phys.Lett.B524:33-43,2002 2) Phys.Rev.Lett.94:122002,2005 3) Phys.Rev.Lett.97:162001,2006 4) Phys.Rev.Lett.98:262001,2007 5) Phys.Lett.B665:9-15,2008 6) Phys.Lett.B672:1-5,2009 7) Phys.Lett.B605:237-246,2005 Foreseen papers in time to be included in the book : (none on radar) Summary of papers (BaBar+Belle): PRL: 8 PRD: 7 PLB: 4 Pending: 2

  3. Detail on papers: Spectroscopy Λc and Σc families: Phys.Rev.D72:052006,2005 (BABAR): Λc+ ground state mass Phys.Rev.Lett.98:012001,2007 (BABAR): Λc(2880) and Λc(2940) mass, width Phys.Rev.Lett.98:262001,2007 (Belle): Spin/parity of Λc(2880); mass+width of Λc(2880) and Λc(2940) Phys.Rev.D78:112003,2008 (BABAR): Σc resonances in B− → Λcp π− Phys.Rev.Lett.94:122002,2005 (Belle): Properties of Σc(2800) Ξc family: Phys.Lett.B605:237-246,2005 (Belle): Masses of Ξc0, Ξc+ Unpublished (BABAR): Mass, spin of Ξ′c0 Phys.Rev.Lett.97:162001,2006 (Belle): Ξc(2980), Ξc(3077); search for Ξcc Ξc family (ctd) Phys.Lett.B665:9-15,2008 (Belle): Ξc(2645), Ξc(2815), Ξc(2980) masses, width of Ξc(2980) Phys.Rev.D77:012002,2008 (BABAR): Ξc(2980), Ξc(3055), Ξc(3077), Ξc(3123) properties Phys.Rev.D77:031101,2008 (BABAR): Possible Ξc(2930) in B− → Λc+ Λc− K− Ωc family: Phys.Rev.Lett.97:232001,2006 (BABAR): Ωc*0 mass Phys.Lett.B672:1-5,2009 (Belle): Masses of Ωc0, Ωc*0 Ξcc family: Phys.Rev.D74:011103,2006 (BABAR): Search for Ξcc

  4. Detail on papers: Decays Weak decay BRs: Phys.Lett.B524:33-43,2002 (Belle): Weak decay BRs of Λc Phys.Rev.D75:052002,2007 (BABAR): Weak decay BRs of Λc Phys.Rev.Lett.95:142003,2005 (BABAR): Weak decay BRs of Ξc0 Phys.Lett.B605:237-246,2005 (Belle): Weak decay BRs of Ξc0, Ξc+ Phys.Rev.Lett.99:062001,2007 (BABAR): Weak decay BRs of Ωc Light baryon properties: Phys.Rev.Lett.97:112001,2006 (BABAR): Spin of Ω− Phys.Rev.D78:034008,2008 (BABAR): Spin of Ξ(1530)0 Unpublished (BABAR): Mass, width, spin of Ξ(1690)0

  5. Section subdivision • Spectroscopy of charmed baryons • Introduction • Overview & terminology • Quark model expectations for ground states • Phenomenological predictions for higher states • The Λc and Σc families of states • The Ξc family of states • The Ωc family of states • Searches for Ξcc states • Conclusions • Weak decays of charmed baryons • Introduction • Results and discussion • Λc+ • Ξc0 and Ξc+ • Ωc0 • Comments on absolute branching fractions • Applications to light baryon spectroscopy • Introduction and terminology • Measuring the Ω− spin • Properties of the Ξ(1530) and Ξ(1690) • Conclusions • Outlook Approximate expected # pages needed for whole section: unclear yet!

  6. Inter-correlation • Several cases where papers involve charmed baryons but main thrust of analysis belongs in another section: • Exclusive B decays to charmed baryons (→ baryonic B decays) • Inclusive momentum spectra of baryons (→ fragmentation and/or baryonic B decays) • Λc+ Λc− pair production with popcorn (→ fragmentation) • Λc+ Λc− pair production in ISR events (→ ISR? Exotics?) • Section editors for baryonic B decays & fragmentation contacted. • Resolution: those analysis topics will be covered elsewhere (i.e. not by us) • Subset of the above include results on charmed baryon spectroscopy / decays in same paper. In those cases, we’ll cover that part. • Example: B−→ Λc+p π− includes results on Σc resonances.

  7. Contributors Confirmed (beside section editors) BaBar: Pat Burchat* Belle: Ruslan Chistov* Un-confirmed BaBar: 2 Belle: 0 * Volunteer for reading/editing/criticism

  8. Comments Would like to be able to say something about absolute charmed baryon branching fractions. Preliminary result from Belle, but no published results from either Belle or BABAR. (Analysis started on BABAR side but almost zero manpower.) This is worth doing!