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Now showing items 49 - 64 of 35756

  • Triples which are D ( n )-sets for several n \"s

    Ad?aga, Nikola   Dujella, Andrej   Kreso, Dijana   Tadi?, Petra  

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  • Investigation on effects of new physics in c→(s,d)l+νltransitions

    冷雪[1]   牟晓龙[2]   邹芝田[1]   李营[1,3]  

    Anomalies in decays induced by b→ct Ve(l=e,μ,T)transitions may imply lepton flavor universality violations,which raises questions on such phenomena in the D decays induced by c→(s,d)t+ve transitions.Current measurements of the pure leptonic and semi-leptonic D decays agree with the standard model(SM)predictions,and such agreements can be used to constrain the new physics(NP)contributions.In this work,we extend SM by as-suming general efective Hamiltonians describing the c→(s,d)t+Ve transitions including the full set of the four-fermion operators.With the latest experimental data,we perform a least χ^(2) fit of the Wilson cofficient corresponding to each operator.The results indicate that the Wilson coefficients of tensor and scalar operators in the muon sector are in the order of 0(10^(-2))while others are in the order of 0(10^(-3)).The lepton flavor universality could be violated by interactions with the scalar operators.We also determine that the pure leptonic decays are significantly sensitive to scalar operators.The efects of NP on the semi-leptonic decays with electron final state are negligible;however,for the decays with the muon final state,the effects of scalar and tensor operators will appear in the forward-back-ward asymmetries and the muon helicity asymmetries of D→Pμ^(+)Vpμdecays.The future measurements of these de-cays in the BESIII and Belle II experiments will facilitate the evaluation of NP effects.
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  • S Q E D (4) and Q E D (4) on the Null-Plane

    Casana, R.   Pimentel, B. M.   Zambrano, G. E. R.  

    We study the scalar electrodynamics (S Q E D (4)) and the spinor electrodynamics (Q E D (4)) in the null-plane formalism. We follow Dirac's technique for constrained systems to analyze the constraint structure in both theories in detail. We impose the appropriate boundary conditions on the fields to fix the hidden subset first class constraints that generate improper gauge transformations and obtain a unique inverse of the second-class constraint matrix. Finally, choosing the null-plane gauge condition, we determine the generalized Dirac brackets of the independent dynamical variables, which via the correspondence principle give the (anti)-commutators for posterior quantization.
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  • ElectroCat: DOE\"s approach to PGM-free catalyst and electrode R&D

    Thompson, Simon T.   Wilson, Adria R.   Zelenay, Piotr   Myers, Deborah J.   More, Karren L.   Neyerlin, K.C.   Papageorgopoulos, Dimitrios  

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  • Crises and Our Political Tasks: Comments on Recent S&D Articles

    McFarland, Duncan  

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  • Multiple-step epitaxial growth S/D regions for NMOS FinFET

    A method of forming NFET S/D structures with multiple layers, with consecutive epi-SiP layers being doped at increasing dosages of P and the resulting device are provided. Embodiments include forming multiple epi-Si layers in each S/D cavity of a NFET; and performing in-situ doping of P for each epi-Si layer, wherein consecutive epi-Si layers are doped at increasing dosages of P.
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  • \\(D_{s3}^*(2860)\\)and\\(D_{s1}^*(2860)\\)as the 1D\\(c\\bar{s}\\)states

    Wang   Zhi-Gang  

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  • Investigation on effects of new physics in c→(s, d)?+ν? transitions

    冷雪;牟晓龙;邹芝田;李营  

    Anomalies in decays induced by b→cl-vl(l=e,μ,τ) transitions may imply lepton flavor universality violations,which raises questions on such phenomena in the D decays induced by c→(s,d)l+vl transitions.Current measurements of the pure leptonic and semi-leptonic D decays agree with the standard model(SM) predictions,and such agreements can be used to constrain the new physics(NP) contributions.In this work,we extend SM by assuming general effective Hamiltonians describing the c→(s,d)l+vl transitions including the full set of the four-fermion operators.With the latest experimental data,we perform a least χ~2 fit of the Wilson coefficient corresponding to each operator.The results indicate that the Wilson coefficients of tensor and scalar operators in the muon sector are in the order of O(10-2) while others are in the order of O(10-3).The lepton flavor universality could be violated by interactions with the scalar operators.We also determine that the pure leptonic decays are significantly sensitive to scalar operators.The effects of NP on the semi-leptonic decays with electron final state are negligible;however,for the decays with the muon final state,the effects of scalar and tensor operators will appear in the forward-backward asymmetries and the muon helicity asymmetries of D→Pμ+vμ decays.The future measurements of these decays in the BE SⅢ and Belle Ⅱ experiments will facilitate the evaluation of NP effects.
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  • Museus, S. D. Asian American Students in Higher Education

    Davidson   K. M.  

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  • Cathepsin D as a therapeutic target in Alzheimer\"s disease

    Di Domenico, Fabio   Tramutola, Antonella   Perluigi, Marzia  

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  • The Chemical Bond and s–d Hybridization in Coinage Metal(I) Cyanides

    De Santis, Matteo   Rampino, Sergio   Storchi, Loriano   Belpassi, Leonardo   Tarantelli, Francesco  

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  • Sonnenlicht und Vitamin D für die Gesundheit von S?uglingen

    Holick   Michael  

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  • Vitamin D and liver fibrosis: let\"s start soon before it\"s too late

    Nobili, Valerio   Reif, Shimon  

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  • KAM for the Klein Gordon equation on\\(\\mathbb {S}^d\\)

    Beno?t Grébert   Eric Paturel  

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  • Reconstructing images corrupted by noise based on D–S evidence theory

    Zhao, Ye   Mi, Ju-sheng   Liu, Xin   Sun, Xiao-yun  

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  • B(s) Semileptonic Decays to D(s) and D(s)* in Bethe-Salpeter Method

    Zhang Jin-Mei   Wang Guo-Li  

    Using the relativistic Bethe-Salpeter method, the electron energy spectrum and the semileptonic decay widths of B(s)(0) --> D(s)(-)l(+)nu(l) and B(s)(0) --> D(s)*(-)l(+)nu(l) are calculated. We obtain a large branching fraction Br (B(s) --> D(s)e nu(e)) = (2.85 +/- 0.35)% and Br (B(s) --> D(s)*e nu(e)) = (7.09 +/- 0.88)%, which can be easily detected in future experiments.
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