Possible , , , and signals in

E. van Beveren; X. Liu; R. Coimbra; G. Rupp

doi:10.1209/0295-5075/85/61002

All issues

Volume 85 / No 6 (March 2009)

EPL, 85 6 (2009) 61002

Abstract

Issue		EPL Volume 85, Number 6, March 2009


Article Number		61002
Number of page(s)		6
Section		The Physics of Elementary Particles and Fields
DOI		https://doi.org/10.1209/0295-5075/85/61002
Published online		07 April 2009

EPL, 85 (2009) 61002

Possible ${\psi(5S)}$ , ${\psi(4D)}$ , ${\psi(6S)}$ , and ${\psi(5D)}$ signals in ${\Lambda_{c}\bar{\Lambda}_{c}}$

E. van Beveren¹, X. Liu¹, R. Coimbra¹ and G. Rupp²

¹ Centro de Física Computacional, Departamento de Física, Universidade de Coimbra - P-3004-516 Coimbra, Portugal, EU
² Centro de Física das Interacções Fundamentais, Instituto Superior Técnico, Technical University of Lisbon P-1049-001 Lisboa, Portugal, EU

Corresponding author: george@ist.utl.pt

Received: 5 September 2008
Accepted: 5 March 2009

Abstract

It is shown that the $\Lambda _{c}^{+}\Lambda _{c}^{-}$ signal recently reported by the Belle Collaboration (Phys. Rev. Lett., 101 (2008) 172001) contains clear signs of the $\psi (5S)$ and the $\psi (4D)\, c\bar{c}$ vector states, and also some indication for the masses and widths of the $\psi (6S)$ and $\psi (5D)$ . Moreover, it is argued that the threshold behaviour of the $\Lambda _{c}^{+}\Lambda _{c}^{- }$ cross-section suggests the presence of the hitherto undetected $\psi (3D)$ state not far below the $\Lambda _{c}^{+}\Lambda _{c}^{-}$ threshold.

PACS: 14.40.Gx – Mesons with $S = C = B = 0$ , mass > 2.5 GeV (including quarkonia) / 13.60.Rj – Baryon production / 14.20.Lq – Charmed baryons

© EPLA, 2009

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