Probing unparticle theory via lepton flavor violating process $J/ψ\to ll'$ at BESIII

Details Probing unparticle theory via lepton flavor violating process $J/ψ\to ll'$ at BESIII Probing unparticle theory via lepton flavor violating process $J/ψ\to ll'$ at BESIII

2008-06-18

arxiv.org/abs/0806.2944v2

Eur.Phys.J.C62:593-598,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 2 figures, revised version for publication

Scientific paper

10.1140/epjc/s10052-009-1071-6

The lepton flavor violating process $J/\psi\to ll' (l\neq l')$ serves as an ideal place to probe the unparticle theory. Such process can only occur at loop level in the Standard model (SM), so that should be very suppressed, by contrast in unparticle scenario, it happens at tree level and its contribution may be sizable for practical measurement. Moreover, the BESIII will offer the largest database on $J/\psi$ which makes more accurate measurements possible. Furthermore, for such purely leptonic decays background is relatively low and signal would be cleaner. Our work carefully investigates the possibility of observing such processes from both theoretical and experimental aspects.

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