Constraints on charged Higgs bosons from D-s(+/-) -> mu(+/-)nu and D-s(+/-) -> tau(+/-)nu

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/38918

Title:	Constraints on charged Higgs bosons from D-s(+/-) -> mu(+/-)nu and D-s(+/-) -> tau(+/-)nu
Authors:	Akeroyd,AG;Mahmoudi,F
Contributors:	物理研究所
Keywords:	LARGE TAN-BETA;SUPERSYMMETRIC THRESHOLD CORRECTIONS;BRANCHING RATIO;SUSY MODELS;S MESON;PHYSICS;UNIFICATION;DECAYS;BREAKING;PROGRAM
Date:	2009
Issue Date:	2010-07-08 13:59:11 (UTC+8)
Publisher:	中央大學
Abstract:	The decays D-s(+/-) -> mu(+/-)nu(mu) and D-s(+/-) -> tau(+/-)nu(tau) have traditionally been used to measure the D-s(+/-) meson decay constant f(Ds). Recent measurements at CLEO-c and the B factories suggest a branching ratio for both decays somewhat higher than the Standard Model prediction using f(Ds) from unquenched lattice calculations. The charged Higgs boson (H-+/-) in the Two Higgs Doublet Model (Type II) would also mediate these decays, but any sizeable contribution from H-+/- can only suppress the branching ratios and consequently is now slightly disfavoured. It is shown that constraints on the parameters tan beta and m(H +/-) from such decays can be competitive with and complementary to analogous constraints derived from the leptonic meson decays B-+/- -> tau(+/-)nu(tau) and K-+/- -> mu(+/-)nu(mu), especially if lattice calculations eventually prefer f(Ds) < 250 MeV.
Relation:	JOURNAL OF HIGH ENERGY PHYSICS
Appears in Collections:	[物理研究所] 期刊論文

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