Regular Article - Theoretical Physics
Λc(2940)+: a possible molecular state?
Physics Department, Peking University, Beijing, 100871, P.R. China
2 Department of Physics and Center for Theoretical Sciences, National Taiwan University, Taipei, 1067, Taiwan
* e-mail: email@example.com
Revised: 29 May 2007
Published online: 1 August 2007
A new baryonic state Λc(2940)+ has recently been discovered by the Babar collaboration in the D0p channel. Later Belle collaboration also observed this state in the Σc(2455)0,++π±→Λc +π+π- channel. The mass of Λc(2940)+ is just a few MeV below the sum of D*0 and p masses suggesting a possibility that this state may be a D*0p molecular state. In this paper we study whether such a molecular state can be consistent with data. We find that the molecular structure can explain data and that if Λc(2940)+ is a D*0p molecular state it is likely a 1/2- state. Several other decays modes are also suggested to further test the molecular structure of Λc +(2940).
© Springer-Verlag / Società Italiana di Fisica, 2007