Decays of the X(3872) and the {chi}{sub c1}(2P) charmonium state

Journal Article · Fri Jun 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.114002· OSTI ID:20929541

Ce, Meng ^[1]; Chao, K -T ^[1]

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1. Department of Physics, Peking University, Beijing 100871 (China)

We reexamine the rescattering mechanism for the X(3872), as a candidate for the 2P charmonium state {chi}{sub c1}(2P), decaying to J/{psi}{rho}({omega}) through exchanging D{sup (*)} mesons between intermediate states D(D) and D*(D*). We evaluate the dispersive part, as well as the absorptive one, of the rescattering amplitude and find that the contribution from the dispersive part is dominant even when X(3872) lies above the threshold of the neutral channel th{sub n}=m{sub D{sup 0}}+m{sub D*{sup 0}}. We predict R{sub {rho}}{sub /{omega}}{approx_equal}1 for the m{sub X} region scanned by experiments. Meanwhile, we also estimate the rate of X{yields}D{sup 0}D{sup 0}{pi}{sup 0}. Our results favor a charmonium interpretation of X(3872) when it lies slightly below the threshold of D{sup 0}D*{sup 0}. Furthermore, we evaluated the width of X{yields}J/{psi}{rho} with the help of a phenomenological effective coupling constant g{sub X}, and find the total width of X(3872) to be in the range of 1-2 MeV.

• OSTI ID: 20929541
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 75; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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