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A search for the exotic theta+ pentaquark in gamma d going to pion-pion-neutral kaon-antikaon 来自 Semantic Scholar 喜欢 0 阅读量: 5 作者: N Baltzell 年份: 2009 收藏 引用 批量引用 报错 分享 全部来源 求助全文 Semantic Scholar
On the other hand, the theory determination of\Gamma _{12}^{d,s}requires in addition a heavy quark expansion in the inverse powers of theb-quark mass, very similar to the one used for theb-hadron lifetimes. Now we have to determine perturbative Wilson coefficients and non-perturbative matr...
(ii) There is not enough new physics in the approach to explain fermion masses, but the structure of the model suggests that the lighter masses and the KM quark mixing angles might be generated radiatively. Unfortunately, careful analysis shows that the same symmetry that protects the K L-K ...
kaon L decay into muon+antimuonkaon L decay into pion 0+electron+positronPenguin-Box ExpansionWe propose a Penguin-Box Expansion (PBE) for flavour-changing neutral-current (FCNC) processes. The basic elements of this expansion are universal m-dependent functions resulting from various box and ...
Since the discovery of the \\Lambda(1405) \\Lambda(1405) , it remains poorly described by conventional constituent quark models, and it is a candidate for having an "exotic" meson-baryon or "penta-quark" structure, similar to states rece... G Scheluchin,S Alef,P Bauer,... 被引量: ...
(ii) There is not enough new physics in the approach to explain fermion masses, but the structure of the model suggests that the lighter masses and the KM quark mixing angles might be generated radiatively. Unfortunately, careful analysis shows that the same symmetry that protects the K L-K ...
The largest and most uncertain of the theoretical corrections is the one for the charmed quark mass. Some authors [11] have used an effective mass as low as 1.1 GeV, or one that depends o n Q2; an upper limit on the effective mass is given by the D mass of 1.9 GeV. But the ...
There are two possible ways to introduce the top-quark FCNC in a BSM model. The first possibility is to increase the number of fermions, modifying the CKM matrix structure, escaping the GIM suppression. This approach is usually referred to as the minimal flavour violation (MFV). The second ...