Radiative decays X(3872){yields}{psi}(2S){gamma} and {psi}(4040){yields}X(3872){gamma} in effective field theory
- Department of Physics, Duke University, Durham, North Carolina 27708 (United States)
Heavy hadron chiral perturbation theory (HH{chi}PT) and XEFT are applied to the decays X(3872){yields}{psi}(2S){gamma} and {psi}(4040){yields}X(3872){gamma} under the assumption that the X(3872) is a molecular bound state of neutral charm mesons. In these decays the emitted photon energies are 181 MeV and 165 MeV, respectively, so HH{chi}PT can be used to calculate the underlying D{sup 0}D{sup 0*}+D{sup 0}D{sup 0*{yields}{psi}}(2S){gamma} or {psi}(4040){yields}(D{sup 0}D{sup 0*}+D{sup 0}D{sup 0*}){gamma} transition. These amplitudes are matched onto XEFT to obtain decay rates. The decays receive contributions from both long-distance and short-distance processes. We study the polarization of the {psi}(2S) in the decay X(3872){yields}{psi}(2S){gamma} and the angular distribution of X(3872) in the decay {psi}(4040){yields}X(3872){gamma} and find they can be used to differentiate between different decay mechanisms as well as discriminate between 2{sup -+} and 1{sup ++} quantum number assignments of the X(3872).
- OSTI ID:
- 21541596
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 83, Issue 9; Other Information: DOI: 10.1103/PhysRevD.83.094009; (c) 2011 American Institute of Physics; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANGULAR DISTRIBUTION
BOUND STATE
CHIRALITY
FIELD THEORIES
MEV RANGE 100-1000
PERTURBATION THEORY
PHOTONS
POLARIZATION
PSI-4040 MESONS
RADIATIVE DECAY
BOSONS
CHARMONIUM
DECAY
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
HADRONS
MASSLESS PARTICLES
MESONS
MEV RANGE
PARTICLE DECAY
PARTICLE PROPERTIES
QUARKONIUM
VECTOR MESONS