Decays of the X(3872) and the {chi}{sub c1}(2P) charmonium state
Abstract
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 12 MeV.
 Authors:
 Department of Physics, Peking University, Beijing 100871 (China)
 (World Laboratory), Beijing 100080 (China)
 Publication Date:
 OSTI Identifier:
 20929541
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.75.114002; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHARMONIUM; COUPLING CONSTANTS; D MESONS; INTERMEDIATE STATE; J PSI3097 MESONS; PARTICLE DECAY; RESCATTERING; RHO770 MESONS
Citation Formats
Meng Ce, Chao, K.T., and China Center of Advanced Science and Technology. Decays of the X(3872) and the {chi}{sub c1}(2P) charmonium state. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVD.75.114002.
Meng Ce, Chao, K.T., & China Center of Advanced Science and Technology. Decays of the X(3872) and the {chi}{sub c1}(2P) charmonium state. United States. doi:10.1103/PHYSREVD.75.114002.
Meng Ce, Chao, K.T., and China Center of Advanced Science and Technology. Fri .
"Decays of the X(3872) and the {chi}{sub c1}(2P) charmonium state". United States.
doi:10.1103/PHYSREVD.75.114002.
@article{osti_20929541,
title = {Decays of the X(3872) and the {chi}{sub c1}(2P) charmonium state},
author = {Meng Ce and Chao, K.T. and China Center of Advanced Science and Technology},
abstractNote = {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 12 MeV.},
doi = {10.1103/PHYSREVD.75.114002},
journal = {Physical Review. D, Particles Fields},
number = 11,
volume = 75,
place = {United States},
year = {Fri Jun 01 00:00:00 EDT 2007},
month = {Fri Jun 01 00:00:00 EDT 2007}
}

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