Wuppertal 2015 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 57: Flavourphysik 2 (Theorie)
T 57.4: Vortrag
Dienstag, 10. März 2015, 17:30–17:45, K.12.16 (K4)
Semileptonic B Decays into Orbitally Excited D Mesons — •Rebecca Klein, Thomas Mannel, and Farnoush Shahriaran — Universität Siegen
The first orbitally excited D meson states can be arranged in two spin symmetry doublets D** = {Djlight=1/2, Djlight=3/2 }= {(D(0+), D(1+)), (D*(1+), D*(2+)) }. The heavy quark effective theory (HQET) Hamiltonian at order 1/mc induces a coupling of the heavy quark spin to the chromomagnetic field of the light degrees of freedom, which is generated by its angular momenta. This effect also leads to a mixing of the two 1+ states, which we estimate by simple means. We discuss the effect on various processes, in particular the semileptonic decays B → D** ℓ ν.