نتایج جستجو برای: decay
تعداد نتایج: 73625 فیلتر نتایج به سال:
A multi-Higgs model with an extra neutral gauge boson (Z ′) is introduced. One scalar Higgs boson (H 2) in this model decays dominantly into a photon pair. The Z ′ decay to µ + µ − gets a much larger branching ratio than the Z decay to this channel. The ZZ ′ H 2 vertex provides a final state from Z decay resembling the new l + l − γγ events at the LEP. Other promising phenomenology, such as Z →...
CP violation from physics beyond the Standard Model (SM) is investigated in the Cabbibo-suppressed decay τ → Kπν τ with polarized τ leptons, to which both the J P = 1 − resonance K * and the J P = 0 + resonance K * 0 contribute. In addition to the CP-odd rate asymmetry, τ polarization enables us to construct three additional CP-odd polarization asymmetries that can be enhanced due to the interf...
The recent discovery of the Bc meson by the CDF collaboration and proposed new experiments at Fermilab and CERN motivate new theoretical studies of the Bc system. Here we investigate the radiative leptonic decay Bc → γlν. This process is an important background to the annihilation process Bc → lν, which will be used to extract the Bc decay constant. We perform a modelindependent calculation, ba...
Supernova neutrinos could be well-suited for probing neutrino decay, since decay may be observed even for very small decay rates or coupling constants. We will use a combined description of neutrino decay and neutrino oscillations for supernova neutrinos, especially taking into account two properties: One is the radially symmetric neutrino flux, allowing a decay product to be re-directed toward...
native population of raspberry fruits (rubus spp) were treated with methyl jasmonate (mj) fumigation and were assayed for the antioxidant capacity, total anthocyanins and postharvest quality after 7 days storage at 4?c. the result of experiment revealed that berries treated with methyl jasmonate (mj) showed higher antioxidant capacity and total anthocyanins compared to the controled ones (non...
the efficiency assessment of dental units using data envelopment analysis approach: the case of iran
background: during the last decades, the number of dentistry units increased significantly across the country. the aim of this study was to assess the efficiency of dental units of iran provinces regarding dental health inputs and outputs using data envelopment analysis approach. methods: in this applied descriptive-analytical study, the study population included all of iran 31 provinces. the o...
objective: although the most useful method to reduce mechanical dental plaque is brushing and flossing, but due to the lack of adequate effectiveness achieved by these methods, the use of other methods such as replacing sweeteners, including xylitol and sorbitol with sucrose in products such as chewing gums have come into the focus of attention. this research was done aimed at examine the effec...
The semileptonic decay of a b-quark, b → clν, is considered in the relativistic limit where the decay products are approximately collinear. Analytic results for the double differential lepton energy distributions are given for finite charm-quark mass. Their use for the fast simulation of isolated lepton backgrounds from heavy quark decays is discussed.
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