Aplication of the QCD sum roles in the studies of possible molecular states

Author(s)

Jorgivan Morais Dias

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Física (IF/SBI)
• Defense date: 2011-03-23

Examining board members

Marina Nielsen; Mirian Enriqueta Bracco; Fernando Silveira Navarra

• Advisor: Marina Nielsen

Abstract

Using the QCD sum rules we test if the new narrow structure, the X(4350) recently observed by the Belle Collaboration, can be described as a JPC = 1+ exotic DsDs0 molecular state. We consider the contributions of condensates up to dimension eight, we work at leading order in s and we keep terms which are linear in the strange quark mass ms. The mass obtained for such state is mDsDs0 = (5.05 ± 0.19) GeV. We also consider a molecular 1+, DD 0 current and we obtain mDD0 = (4.92 ± 0.08) GeV. We conclude that it is not possible to describe the X(4350) structure as a 1+ DsDs0 molecular state (AU)

• FAPESP's process: 09/03185-6 - Aplication of QCD Sum Rules in the Studies Possibles Molecular States
• Grantee: Jorgivan Morais Dias
• Support Opportunities: Scholarships in Brazil - Master