نتایج جستجو برای: پروتونهای mev 69 45
تعداد نتایج: 231471 فیلتر نتایج به سال:
We investigate the mass spectrum of pentaquark baryons with anticharm quark, in quenched lattice QCD with exact chiral symmetry. By chiral extrapolation to mπ = 135 MeV, we determine the masses of the lowest lying states of the antisextet (JΠ = 1/2+) and the triplet (JΠ = 1/2), in the isospin limit (mu = md). The masses of the antisextet are: 2977(109) MeV for the iso-singlet Θc([ud][ud]c̄); 318...
Based on 106×10(6)ψ(3686) events collected with the BESIII detector at the BEPCII facility, a partial wave analysis of ψ(3686)→ppπ0 is performed. The branching fraction of this channel has been determined to be B(ψ(3686)→ppπ0)=(1.65±0.03±0.15)×10(-4). In this decay, 7 N* intermediate resonances are observed. Among these, two new resonances, N(2300) and N(2570) are significant, one 1/2+ resonanc...
We summarize the potential of muon colliders to probe fundamental physics. WW, t̄t, and Zh threshold measurements could determine masses to precisions ∆MW = 6 MeV, ∆mt = 70 MeV, and ∆mh = 45 MeV, to test electroweak radiative corrections. With s-channel Higgs production, unique to a muon collider, the Higgs mass could be pinpointed (∆mh < 1 MeV) and its width measured. The other Higgs bosons of ...
Eukaryotic initiation factor (eIF) 4E-binding protein 1 (4E-BP1) is a translational repressor that is characterized by its capacity to bind specifically to eIF4E and inhibit its interaction with eIF4G. Phosphorylation of 4E-BP1 regulates eIF4E availability, and therefore, cap-dependent translation, in cell stress. This study reports a physiological study of 4E-BP1 regulation by phosphorylation ...
Differential cross sections for elastic scattering of photons have been measured for 40Ca at energies of 58 and 74 MeV and for 16O and 4He at 61 MeV, in the angular range from 45◦ to 150◦. Evidence is obtained that there are no significant in-medium modifications of the electromagnetic polarizabilities except for those originating from meson exchange currents. PACS number: 25.20.Dc
در این پایان نامه، بررسی دینامیک 1h nmr در ایلیدهای پایدار فسفر، به عنوان محصول عمده از واکنش افزایشی 1:1:1، بین تری فنیل فسفین با دی متیل استیلن دی کربوکسیلات در حضور مشتقات ایمیدازول یا 1و5 دی فنیل کربازون مطالعه می شود. معمولآ، ایلیدهای پایدار بصورت مخلوطی از دو ایزومر هندسی در اثر چرخش محدود شده حول پیوند دوگانه کربن-کربن بوجود می آیند. پارامتر های فعال سازی در این ترکیبات برای چرخش های ساد...
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