Direct probes of flavor-changing neutral currents in e(+)e(-)-collisions

作者：Khodjamirian Alexander^*; Mannel Thomas; Petrov Alexey A

来源：The Journal of High Energy Physics, 2015, 2015(11): 1-21.

DOI：10.1007/JHEP11(2015)142

• Rare Decays
• Heavy Quark Physics
• Beyond Standard Model

We propose a novel method to study flavor-changing neutral currents in the e(+)e(-) -> D*(0) and e(+)e(-) -> B-s* transitions, tuning the energy of e(+)e(-)-collisions to the mass of the narrow vector resonance D*(0) or B-s* . We present a thorough study of both short-distance and long-distance contributions to e(+)e(-) -> D*(0) in the Standard Model and investigate possible contributions of new physics in the charm sector. This process, albeit very rare, has clear advantages with respect to the D-0 -> e(+)e(-) decay: the helicity suppression is absent, and a richer set of effective operators can be probed. Implications of the same proposal for B-s* are also discussed.

• 出版日期2015-11-20