Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Form Factors For Semileptonic Bs Klv Decays In Lattice Qcd full books in PDF, epub, and Kindle. Read online Form Factors For Semileptonic Bs Klv Decays In Lattice Qcd ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author : Felix Bahr
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (951 download)
Download or read book Form Factors for Semileptonic Bs -> Klv Decays in Lattice QCD written by Felix Bahr and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Felix Tobias Bahr
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (118 download)
Download or read book Form Factors for Semileptonic Bs → Klν Decays in Lattice QCD written by Felix Tobias Bahr and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (935 download)
Download or read book Form Factors for Bs → Klv Decays in Lattice QCD written by and published by . This book was released on 2014 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Emel Gulez
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (858 download)
Download or read book B Meson Semileptonic Form Factors Using Unquenched Lattice QCD written by Emel Gulez and published by . This book was released on 2006 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: We present state-of-the-art unquenched lattice QCD results for B meson semileptonic decay, B [rightarrow] [pi]lv, form factors. We use gauge configurations prepared by the MILC collaboration, which include the effects of the sea quarks, the s quark and two very light quarks (u and d). We employ the nonrelativistic NRQCD action to simulate the heavy b quark and a highly improved staggered quark action (AsqTad) to simulate the sea and valence light quarks. To reduce the uncertainties, we perform matching of the heavy-light current with these highly improved actions through one loop. The perturbative matching accounts for the effects of mixing with dimension 4 operators that are O(1/M) and O(a). We extrapolate the form factors f+(q2) and f0(q2) to their values at the physical pion mass using chiral perturbation theory formulas. Integrating this result, we obtain [integral] [from] 16 GeV2 [to] q2_max [d[gamma]/dq2]d2 (V_ub)2 = 1.46(35) ps−1. Combining this with a preliminary average by the Heavy Flavor Averaging Group (HFAG'05) of recent branching fraction data for exclusive B semileptonic decays from the BaBar, Belle and CLEO collaborations, leads to V_ub = 4.22(30)(51) x 10−3.
Author :
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (873 download)
Download or read book Semi-leptonic Form-factors from Lattice QCD. written by and published by . This book was released on 1994 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results for semi-leptonic form-factors obtained on statistical sample of 63 323 × 64 lattices at [beta] = 6.0 using quenched Wilson fermions. We find f+{sup D→Klv} (q2 = 0) = 0.73 ± 0.06, A2/A1(D → K*lv) = 0.79 ± 0.23, V/A1(D{sub s} → [phi]lv) = 1.89 ± 0.04, and A2/A1(D{sub s} {yields} [phi]lv) = 0.70 ± 0.09, where the error estimate includes statistical errors and errors due to extrapolation to q2 = 0 and to physical values of (m{sub u} + m{sub d})/2 and m{sub s}. The remaining sources of systematic errors are those due to O(a) discretization errors and those due to quenching, which our results indicate may be small. We also comment on the validity of pole-dominance in these form-factors.
Author :
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (873 download)
Download or read book Form Factors for $B$ to $Kll$ Semileptonic Decay from Three-Flavor Lattice QCD. written by and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We study the B 2!Kll− semileptonic decay process in three-flavor lattice QCD. We analyze several ensembles generated by theMILC collaboration at different lattice spacings and sea-quark masses. We use the asqtad improved staggered action for the light quarks and the clover action with the Fermilab interpretation for the heavy b quark. We present preliminary results for the vector current induced form factors for a range of kaon energies. Our analysis includes chiral and continuum extrapolations based on SU(2) staggered [chi]PT.
Download or read book $B\to Kl^+l^-$ Decay Form Factors from Three-flavor Lattice QCD. written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We compute the form factors for the B → Kl+l- semileptonic decay process in lattice QCD using gauge-field ensembles with 2+1 flavors of sea quark, generated by the MILC Collaboration. The ensembles span lattice spacings from 0.12 to 0.045 fm and have multiple sea-quark masses to help control the chiral extrapolation. The asqtad improved staggered action is used for the light valence and sea quarks, and the clover action with the Fermilab interpretation is used for the heavy b quark. We present results for the form factors f+(q2), f0(q2), and fT(q2), where q2 is the momentum transfer, together with a comprehensive examination of systematic errors. Lattice QCD determines the form factors for a limited range of q2, and we use the model-independent z expansion to cover the whole kinematically allowed range. We present our final form-factor results as coefficients of the z expansion and the correlations between them, where the errors on the coefficients include statistical and all systematic uncertainties. Lastly, we use this complete description of the form factors to test QCD predictions of the form factors at high and low q2.
Author : Edwin Lizarazo
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (111 download)
Download or read book B Physics from Lattice QCD written by Edwin Lizarazo and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (873 download)
Download or read book Visualization of Semileptonic Form Factors from Lattice QCD. written by and published by . This book was released on 2009 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comparisons of lattice-QCD calculations of semileptonic form factors with experimental measurements often display two sets of points, one each for lattice QCD and experiment. Here we propose to display the output of a lattice-QCD analysis as a curve and error band. This is justified, because lattice-QCD results rely in part on fitting, both for the chiral extrapolation and to extend lattice-QCD data over the full physically allowed kinematic domain. To display an error band, correlations in the fit parameters must be taken into account. For the statistical error, the correlation comes from the fit. To illustrate how to address correlations in the systematic errors, we use the Becirevic-Kaidalov parametrization of the D → [pi]l[nu] and D → Kl[nu] form factors, and a analyticity-based fit for the B → [pi]l[nu] form factor f+.
Author : Aoife Katy Manek Bharucha
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book B → K*μ+μ- and Form Factors for Semi-leptonic and Radiative B Decays written by Aoife Katy Manek Bharucha and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The hadronic environment of the LHC favours the study of exclusive modes, and of these semi-leptonic and radiative B decays will play a leading role in the search for new physics (NP). A prime example is the rare decay B?K?(? K?)?+??, where the many measurable quantities offer important new tests of the Standard Model and its extensions. We de?ne sets of CP-conserving and CP-violating observables which are studied in terms of the full form factors, calculated in QCD sum rules on the light-cone (LCSR), and QCD factorisation. Those with reduced dependence on hadronic quantities and sensitivity to NP are identi?ed. In the ?rst few years of data?taking at the LHC, the focus will be on quantities which are simple to extract while maximising the available NP sensitivity. Out of three such observables, two are well known to the experimental community. However a third, one of the CP-conserving angular observables, leads to signi?cant additional constraints on parameter space. We then study form factors for rare semi-leptonic and radiative B decays to K(?) , ? and ?s mesons, combining theoretical and phenomenological constraints from Lattice QCD, LCSR, and dispersive bounds. We pay particular attention to form factor parameterisations which are based on the so-called series expansion, and study the related systematic uncertainties on a quantitative level. Finally we calculate the leading-twist O(?s?0) corrections to the B ? ? transition form factor f+ (0) in LCSR, allowing an improved determination of the CKM matrix element |Vub |.
Author : R. S. Marques de Carvalho
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (559 download)
Download or read book Form Factors and Decay Rates for Heavy 'lâmbda' Semileptonic Decays from QCD Sum Rules written by R. S. Marques de Carvalho and published by . This book was released on 1999 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. Banerjee
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (118 download)
Download or read book Form Factors in the Bs → Klv Decays Using HQET and the Lattice written by D. Banerjee and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Semileptonic Form Factor Ratio B_s-]D_s/B-]D and Its Application to BR(B0̂_s-]\mu+̂\mu-̂). PDF Online Free](https://books.google.com/books/content/images/frontcover/qqC3wgEACAAJ?fife=w200-h370)
Author :
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (16 download)
Download or read book Semileptonic Form Factor Ratio B_s-]D_s/B-]D and Its Application to BR(B0̂_s-]\mu+̂\mu-̂). written by and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a (2+1)-flavor lattice QCD calculation of the form factor ratio between the semileptonic decays {bar B}{sub s}° → D{sub s}l−{bar {nu}} and {bar B}° → D+l−{bar {nu}}. This ratio is an important theoretical input to the hadronic determination of the B meson fragmentation fraction ratio f{sub s}/f{sub d} which enters in the measurement of BR(B{sub s}° →?+?−). Small lattice spacings and high statistics enable us to simulate the decays with a dynamic final D meson of small momentum and reliably extract the hadronic matrix elements at nonzero recoil. We report our preliminary result for the form factor ratio at the corresponding momentum transfer of the two decays f0{sup (s)} (M{sub {pi}}2)/f0{sup (d)} (M{sub K}2).
Download or read book Kaon and D Meson Semileptonic Form Factors from Lattice QCD. written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present the status of on-going calculations of the $K\to\pi l\nu$ and $D\to K(\pi) l\nu$ semileptonic form factors at $q^2=0$. These form factors are important for the determination of the CKM matrix elements $\lvert{V_{us}}\rvert$ and $\lvert{V_{cs(d)}}\rvert$ respectively. This work uses the HISQ action for both valence quarks and sea quarks on MILC $N_f=2+1+1$ configurations. We employ twisted boundary conditions to calculate the form factors at zero momentum transfer directly. The $K\to\pi$ results are an update to previously published results with new data at the physical point. The $D\to K(\pi)$ results are preliminary.
Download or read book $B_s\to D_s/B\to D$ Semileptonic Form-Factor Ratios and Their Application to BR($B0̂_s\to \mu+̂\mu-̂$). written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We calculate form-factor ratios between the semileptonic decays {bar B}° → D l−{bar {nu}} and {bar B}{sub s}° → D{sub s}+l−{bar {nu}} with lattice QCD. These ratios are a key theoretical input in a new strategy to determine the fragmentation fractions of the neutral B decays, which are needed for measurements of BR(B{sub s}° →?+?−). They use the MILC ensembles of gauge configurations with 2 + 1 flavors of sea quarks at two lattice spacings of approximately 0.12 fm and 0.09 fm. We use the model-independent z parametrization to extrapolate their simulation results at small recoil toward maximum recoil. The results for the form-factor ratios are {line_integral}0{sup (s)} (M{sub {pi}}2)/{line_integral}0{sup (d)} (M{sub K}2) = 1.046(44){sub stat.}(15){sub syst.} and {line_integral}0{sup (s)} (M{sub {pi}}2)/{line_integral}0{sup (d)} (M{sub {pi}}2) = 1.054(47){sub stat.}(17){sub syst.}. In contrast to a QCD sum-rule calculation, no significant departure from U-spin (d ↔ s) symmetry is observed.
Author : Lodovico Antonio Muratori
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (162 download)
Download or read book Epistolario written by Lodovico Antonio Muratori and published by . This book was released on 1902 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Aida Xenia El-Khadra
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.:/5 (214 download)
Download or read book Lattice Calculation of Meson Form Factors for Semi-leptonic Decays written by Aida Xenia El-Khadra and published by . This book was released on 1989 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
