Radiative decays X(3872){yields}{psi}(2S){gamma} and {psi}(4040){yields}X(3872){gamma} in effective field theory

Journal Article · Sun May 01 04:00:00 EDT 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.094009· OSTI ID:21541596

Mehen, Thomas; Springer, Roxanne ^[1]

---

1. 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, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
BOSONS
BOUND STATE
CHARMONIUM
CHIRALITY
DECAY
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
HADRONS
MASSLESS PARTICLES
MESONS
MEV RANGE
MEV RANGE 100-1000
PARTICLE DECAY
PARTICLE PROPERTIES
PERTURBATION THEORY
PHOTONS
POLARIZATION
PSI-4040 MESONS
QUARKONIUM
RADIATIVE DECAY
VECTOR MESONS