Determination of the compositeness of resonances from decays: The case of the $B_s^0\to J/\psi f_1\left(1285\right)$

Journal Article · Wed Jun 01 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.114004· OSTI ID:1306382

Molina, R.; Döring, M.; Oset, E.

We develop a method to measure the amount of compositeness of a resonance, mostly made as a bound state of two hadrons, by simultaneously measuring the rate of production of the resonance and the mass distribution of the two hadrons close to threshold. By using different methods of analysis we conclude that the method allows one to extract the value of 1-Z with about $0.1$ of uncertainty. The method is applied to the case of the $$\bar B^0_s \to J/\psi f_1(1285)$$ decay, by looking at the resonance production and the mass distribution of $$K \bar K^*$$.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: FIS2014-51948-C2-2-P; SEV-2014-0398; PROMETEOII/2014/0068; 1452055; 1415459
• OSTI ID: 1306382
• Report Number(s): JLAB-THY-16-2319; DOE/OR/23177-3905; arXiv:1604.02574; PRVDAQ
• Journal Information: Physical Review D, Vol. 93, Issue 11; Related Information: Jefferson Lab Publications: https://misportal.jlab.org/ul/publications/view_pub.cfm?pub_id=14472; ISSN 2470-0010
• Country of Publication: United States
• Language: English