نتایج جستجو برای: quark decay

تعداد نتایج: 99408  

Journal: :Physical Review D 2005

Journal: :Physics Letters B 2011

Journal: :Physical Review D 2014

2000

We assumed that the four gluino containing R-hadrons are the lightest hadrons which contain the LSP. The lighest among these is stable and the other three can deacy into it. Gluon-quark-quark bound state is not observed in nature. One asumption is that it is a repulsive channel in non-purturbative QCD and consequently unstable. On the other hand glueballs are observed and have a finite mass and...

1998
Joan SOLÀ

We compare the standard top quark decay and the charged Higgs decay of the top quark, t → W b and t → H b, at the quantum level in the MSSM. While the SUSY loop corrections to the standard top quark decay are only of a few percent, it turns out that t → H b is a most promising candidate for carrying large quantum SUSY signatures. As a result, the (tanβ,MH±) exclusion plots presented by the CDF ...

2003
C. McNeile

We discuss strategies to determine hadronic decay couplings from lattice studies. As an application, we explore the decay of a vector meson to two pseudoscalar mesons with Nf = 2 flavours of sea quark. Although we are working with quark masses that do not allow a physical decay, we show how the transition rate can be evaluated from the amplitude for ρ→ ππ and from the annihilation component of ...

1997
S. Aoki G. Boyd R. Burkhalter S. Hashimoto N. Ishizuka Y. Iwasaki K. Kanaya Y. Kuramashi M. Okawa A. Ukawa T. Yoshié

We present progress report of a CP-PACS calculation of quenched QCD spectrum with the Wilson quark action. Light hadron masses and meson decay constants are obtained at β =5.9, 6.1, and 6.25 on lattices with a physical extent of 3 fm, and for the range of quark mass corresponding to mπ/mρ ≈ 0.75 − 0.4. Nucleon mass at each β appears to be a convex function of quark mass, and consequently the va...

1997
S. Aoki G. Boyd R. Burkhalter S. Hashimoto N. Ishizuka Y. Iwasaki K. Kanaya Y. Kuramashi M. Okawa A. Ukawa T. Yoshié

We present progress report of a CP-PACS calculation of quenched QCD spectrum with the Wilson quark action. Light hadron masses and meson decay constants are obtained at β =5.9, 6.1, and 6.25 on lattices with a physical extent of 3 fm, and for the range of quark mass corresponding to mπ/mρ ≈ 0.75 − 0.4. Nucleon mass at each β appears to be a convex function of quark mass, and consequently the va...

1996
G. Rodrigo

We present the calculation of the decay width of the Z-boson into three jets including complete quark mass effects to second order in the strong coupling constant. The study is done for different jet clustering algorithms such as EM, JADE, E and DURHAM. Because three-jet observables are very sensitive to the quark mass we consider the possibility of extracting the bottom quark mass from LEP dat...

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