Exotic and excited-state radiative transitions in charmonium from lattice QCD

Dudek, Jozef J.; Edwards, Robert G.; Thomas, Christopher E.

doi:10.1103/PhysRevD.79.094504

Title: Exotic and excited-state radiative transitions in charmonium from lattice QCD

Journal Article · Fri May 01 00:00:00 EDT 2009 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.79.094504· OSTI ID:979698

Dudek, Jozef J. ^[1]; Edwards, Robert G. ^[2]; Thomas, Christopher E. ^[2]

Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Old Dominion Univ., Norfolk, VA (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

We compute, for the first time using lattice QCD methods, radiative transition rates involving excited charmonium states, states of high spin and exotics. Utilizing a large basis of interpolating fields we are able to project out various excited state contributions to three-point correlators computed on quenched anisotropic lattices. In the first lattice QCD calculation of the exotic $$1^{-+}$$ $$\eta_{c1}$$ radiative decay, we find a large partial width $$\Gamma(\eta_{c1} \to J/\psi \gamma) \sim 100 \,\mathrm{keV}$$. We find clear signals for electric dipole and magnetic quadrupole transition form factors in $$\chi_{c2} \to J/\psi \gamma$$, calculated for the first time in this framework, and study transitions involving excited $$\psi$$ and $$\chi_{c1,2}$$ states. We calculate hindered magnetic dipole transition widths without the sensitivity to assumptions made in model studies and find statistically significant signals, including a non-exotic vector hybrid candidate $Y_{\mathrm{hyb?}} \to \et

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 979698

Report Number(s):: JLAB-THY-09-949; DOE/OR/23177-0632; PRVDAQ; TRN: US1003376

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 79, Issue 9; ISSN 1550-7998

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 89 works

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