ar X iv : 1 01 1 . 60 46 v 2 [ he p - ph ] 1 1 Ju n 20 11 Exclusive D s → ( η , η ′ ) lν decays in light cone QCD
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چکیده
X iv :1 01 1. 60 46 v2 [ he pph ] 1 1 Ju n 20 11 Exclusive Ds → (η, η′)lν decays in light cone QCD K. Azizi1 ∗, R. Khosravi2 †, F. Falahati3 ‡ Physics Division, Faculty of Arts and Sciences, Doğuş University, Acıbadem-Kadıköy, 34722 Istanbul, Turkey Physics Department, Jahrom Higher Education Complex, 74137 Jahrom, Iran Physics Department, Shiraz University, Shiraz 71454, Iran Abstract Probing the s̄s content of the η and η′ mesons and considering mixing between these states as well as gluonic contributions, the form factors responsible for semileptonic Ds → (η, η′)lν transitions are calculated via light cone QCD sum rules. Corresponding branching fractions and their ratio for different mixing angles are also obtained. Our results are in a good consistency with experimental data as well as predictions of other nonperturbative approaches.
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