Exclusive heavy quarkonium + gamma production from e+ e- annihilation into a virtual photon

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dc.creatorChung, Hee Sok
dc.creatorLee, Jungil
dc.creatorYu, Chaehyun
dc.date2008-08-12
dc.date2008-10-27
dc.date.accessioned2026-07-07T11:45:27Z
dc.date.available2026-07-07T11:45:27Z
dc.descriptionWe compute the cross section for exclusive production of a photon associated with a heavy quarkonium H of charge-conjugation parity C=+1 from e+ e- annihilation into a virtual photon at the center-of-momentum energy root-s=10.58 GeV. The NRQCD factorization formulas for the differential and total cross sections are obtained at leading order in the strong coupling and in the relative velocity of the heavy quark in the quarkonium rest frame. The predicted cross sections for the S-wave spin-singlet cases are about 80 fb and 50 fb for H = eta_c and eta_c(2S), respectively. Among P-wave spin-triplet charmonia, chi_{c1} has a particularly large cross section of about 14 fb. The cross sections for bottomonium states eta_b and chi_{bJ} are about 3 fb. A rough estimate of the background reveals that the signal significances for charmonium processes are sufficiently large enough to be detected with ease with the integrated luminosities available at the present B factories.
dc.description22 pages, 1 figure, version published in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/0808.1625
dc.identifierhttp://arxiv.org/abs/0808.1625
dc.identifierPhys.Rev.D78:074022,2008
dc.identifierdoi:10.1103/PhysRevD.78.074022
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201884
dc.subjectHigh Energy Physics - Phenomenology
dc.titleExclusive heavy quarkonium + gamma production from e+ e- annihilation into a virtual photon
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