scholarly journals Form-factor-independent test of lepton universality in semileptonic heavy meson and baryon decays

2021 ◽  
Vol 103 (9) ◽  
Author(s):  
Stefan Groote ◽  
Mikhail A. Ivanov ◽  
Jürgen G. Körner ◽  
Valery E. Lyubovitskij ◽  
Pietro Santorelli ◽  
...  
Keyword(s):  
Form Factor ◽  
Heavy Meson ◽  
Lepton Universality ◽  
Independent Test

scholarly journals Symmetry-breaking corrections to heavy meson form-factor relations

2002 ◽  
Vol 533 (1-2) ◽  
pp. 8-16 ◽  
Author(s):  
Benjamı́n Grinstein ◽  
Dan Pirjol
Keyword(s):  
Form Factor ◽  
Symmetry Breaking ◽  
Heavy Meson

scholarly journals SEMILEPTONIC B→D(*)lν DECAYS, THE SLOPE OF ISGUR-WISE FUNCTION AND |Vbc| VALUE IN POTENTIAL QUARK MODEL

1995 ◽  
Vol 10 (13n14) ◽  
pp. 1049-1056 ◽  
Author(s):  
V.V. KISELEV
Keyword(s):  
Experimental Data ◽  
Form Factor ◽  
Quark Model ◽  
Potential Model ◽  
Semileptonic Decays ◽  
Heavy Meson ◽  
Relative Momentum ◽  
Single Time

The modification of the naive potential model of the heavy meson is considered on the basis of the single-time prescription for the quark-meson form factor and the covariant choice of the quark relative momentum. The application of the model to the description of the semileptonic decays of the beauty meson allows one to determine the Isgur-Wise function slope ρ2≃0.94 and to extract the value |Vbc|=0.036±0.002 from the experimental data.

scholarly journals Optimized lepton universality tests in $$B\rightarrow V \ell {\bar{\nu }}$$ decays

2020 ◽  
Vol 80 (11) ◽  
Author(s):  
Gino Isidori ◽  
Olcyr Sumensari
Keyword(s):  
Form Factor ◽  
Minimum Loss ◽  
Mass Distributions ◽  
Lepton Flavor ◽  
Lepton Universality ◽  
Conservative Form

AbstractWe propose improved lepton flavor universality (LFU) ratios in semileptonic $$P\rightarrow V \ell {\bar{\nu }}$$ P → V ℓ ν ¯ decays, when comparing $$\mu $$ μ and $$\tau $$ τ modes, that minimize the theoretical form-factor uncertainties. These optimized ratios are obtained with simple cuts or reweighting of the dilepton mass distributions, which imply a minimum loss of signal on the rare tauonic modes while maximizing the cancellation of theoretical uncertainties among the two modes. We illustrate the usefulness of these observables in $$B_c\rightarrow J/\psi $$ B c → J / ψ , $$B_c\rightarrow \psi (2S)$$ B c → ψ ( 2 S ) , $$B\rightarrow D^*$$ B → D ∗ and $$B_s\rightarrow D_s^*$$ B s → D s ∗ transitions, showing that in all cases we can reach $${\mathcal {O}}(1\%)$$ O ( 1 % ) uncertainties on the SM predictions of the improved LFU ratios employing conservative form-factor uncertainties.

The effect of temperature on high-resolution TEM image contrast

1995 ◽  
Vol 53 ◽  
pp. 640-641
Author(s):  
T. Geipel ◽  
W. Mader ◽  
P. Pirouz
Keyword(s):  
Form Factor ◽  
Inelastic Scattering ◽  
Accurate Method ◽  
Waller Factor ◽  
Effect Of Temperature ◽  
Specimen Thickness ◽  
Influence Of Temperature ◽  
Debye Waller Factor ◽  
Influence Of Temperature On ◽  
Atomic Form Factor

Temperature affects both elastic and inelastic scattering of electrons in a crystal. The Debye-Waller factor, B, describes the influence of temperature on the elastic scattering of electrons, whereas the imaginary part of the (complex) atomic form factor, fc = fr + ifi, describes the influence of temperature on the inelastic scattering of electrons (i.e. absorption). In HRTEM simulations, two possible ways to include absorption are: (i) an approximate method in which absorption is described by a phenomenological constant, μ, i.e. fi; - μfr, with the real part of the atomic form factor, fr, obtained from Hartree-Fock calculations, (ii) a more accurate method in which the absorptive components, fi of the atomic form factor are explicitly calculated. In this contribution, the inclusion of both the Debye-Waller factor and absorption on HRTEM images of a (Oll)-oriented GaAs crystal are presented (using the EMS software.Fig. 1 shows the the amplitudes and phases of the dominant 111 beams as a function of the specimen thickness, t, for the cases when μ = 0 (i.e. no absorption, solid line) and μ = 0.1 (with absorption, dashed line).

MAGNETIC FORM FACTOR MEASUREMENTS IN CERIUM HEXABORIDE

1982 ◽  
Vol 43 (C7) ◽  
pp. C7-273-C7-278 ◽  
Author(s):  
P. Burlet ◽  
J. X. Boucherle ◽  
J. Rossat-Mignod ◽  
J. W. Cable ◽  
W. C. Koehler ◽  
...  
Keyword(s):  
Form Factor ◽  
Magnetic Form Factor

FORM FACTOR MEASUREMENTS IN CeTe

1982 ◽  
Vol 43 (C7) ◽  
pp. C7-263-C7-271 ◽  
Author(s):  
J. X. Boucherle ◽  
D. Ravot ◽  
J. Schweizer
Keyword(s):  
Form Factor

FORM FACTOR MEASUREMENT IN FERROMAGNETIC COBALT ORTHOVANADATE

1982 ◽  
Vol 43 (C7) ◽  
pp. C7-253-C7-256
Author(s):  
H. Fuess ◽  
R. Müller ◽  
D. Schwabe ◽  
F. Tasset
Keyword(s):  
Form Factor ◽  
Factor Measurement ◽  
Ferromagnetic Cobalt

Using Connectionist Modules for Decision Support

1990 ◽  
Vol 29 (03) ◽  
pp. 167-181 ◽  
Author(s):  
G. Hripcsak
Keyword(s):  
Decision Support ◽  
Standard Deviation ◽  
Confidence Interval ◽  
Posterior Probability ◽  
Back Propagation ◽  
Connectionist Model ◽  
Test Set ◽  
The Third ◽  
Independent Test ◽  
Better Than

AbstractA connectionist model for decision support was constructed out of several back-propagation modules. Manifestations serve as input to the model; they may be real-valued, and the confidence in their measurement may be specified. The model produces as its output the posterior probability of disease. The model was trained on 1,000 cases taken from a simulated underlying population with three conditionally independent manifestations. The first manifestation had a linear relationship between value and posterior probability of disease, the second had a stepped relationship, and the third was normally distributed. An independent test set of 30,000 cases showed that the model was better able to estimate the posterior probability of disease (the standard deviation of residuals was 0.046, with a 95% confidence interval of 0.046-0.047) than a model constructed using logistic regression (with a standard deviation of residuals of 0.062, with a 95% confidence interval of 0.062-0.063). The model fitted the normal and stepped manifestations better than the linear one. It accommodated intermediate levels of confidence well.

Perbedaan Metode Three Compartement Sink dengan Air Panas dan Larutan Klorin terhadap Angka Kuman Alat Makan di RSU Queen Latifa

2017 ◽  
Vol 19 (2) ◽  
pp. 126-130
Author(s):  
Rifatun Hasanah ◽  
Setyowati Setyowati ◽  
Noor Tifauzah
Keyword(s):  
Infectious Diseases ◽  
Confidence Level ◽  
Disease Transmission ◽  
T Test ◽  
Hot Water ◽  
Independent Test ◽  
The Difference ◽  
Hospital Use

Background:One of the efforts in preventing congenital food disease is by washing the cutlery perfectly. The cutlery used by patients with infectious diseases should be noted more, because it has a risk in disease transmission through cutlery. The process of washing the cutlery for infected patients in Queen Latifa Hospital use three compartement sink method with hot water, while the three compartement sink method with clorine solvent has never been tested. Purpose: Research was to determine the difference in the number of germs in the tool was washed using three compartement sink method with hot water and with clorine solvent. Method:Types of research is experiment with rancangan percobaan acak kelompok (RAK). The object of this research is 4 plates and 4 bowls. The number of experimental units in this research were 2 treatments x 2 cutlery x 2 checks x 2 reapetitions = 16 experimental units. The analysis used independent t-test with 95% confidence level. Result :The average number of germs in the cutlery washed using the three compartment sink method with hot water was 1 x 101 cfu / cm2, whereas with chlorine solvent is 0.2 cfu / cm2. Independent test t-test shows p = 0.049 which means the hypothesis is accepted. onclusion : There are differences in the number of germs in the washing cutlery using the three compartment sink method with hot water and with chlorine solvent.   Keywords: number of germs, cutlery, three compartment sink

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