Berger, B.E.
FORMFAC
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The charge form factor of the neutron from the reaction H-2(pol.)(e(pol.),e' n)p.

Passchier, I. ; Alarcon, R. ; Bauer, T.S. ; et al.
Phys.Rev.Lett. 82 (1999) 4988-4991, 1999.
Inspire Record 504073 DOI 10.17182/hepdata.31239

We report on the first measurement of spin-correlation parameters in quasifree electron scattering from vector-polarized deuterium. Polarized electrons were injected into an electron storage ring at a beam energy of 720~MeV. A Siberian snake was employed to preserve longitudinal polarization at the interaction point. Vector-polarized deuterium was produced by an atomic beam source and injected into an open-ended cylindrical cell, internal to the electron storage ring. The spin correlation parameter A^V_{ed} was measured for the reaction \pol{2H}(\pol{e},e'n)p at a four-momentum transfer squared of 0.21 (GeV/c)^2 from which a value for the charge form factor of the neutron was extracted.

1 data table
Table 1

No description provided.


Studies of the Cabibbo-suppressed decays D+ --> pi0 l+ nu and D+ --> eta e+ nu/e.

The CLEO collaboration Bartelt, John E. ; Csorna, S.E. ; Jain, V. ; et al.
Phys.Lett.B 405 (1997) 373-378, 1997.
Inspire Record 441553 DOI 10.17182/hepdata.47235

Using 4.8 fb$~{-1}$ of data taken with the CLEO II detector, the branching fraction for the Cabibbo-suppressed decay $D~+\to\pi~0\ell~+\nu$ measured relative to the Cabibbo favored decay $D~+\to\bar{K~0}\ell~+\nu$ is found to be $0.046\pm 0.014\pm 0.017$. Using $V_{cs}$ and $V_{cd}$ from unitarity constraints, we determine $| f_+~{\pi}(0)/f_+~K(0)|~2=0.9\pm 0.3\pm 0.3$ We also present a 90% confidence level upper limit for the branching ratio of the decay $D~+ \to \eta e~+\nu_e$ relative to that for $D~+ \to \pi~0 e~+\nu_e$ of 1.5.

1 data table
Table 1

Formfactors for the D+ (D-) decay into pseudoscalar P. Charge conjugate states are implied. LEPTON+ means E+ or MU+. VCD and VCS are the elements of the CKM matrix (See R.M.Barnett et al (PDG), PR D54, 1 (1996)).


rivet Analysis
Measurements of B ---> D(s)+ X decays

The CLEO collaboration Gibaut, D. ; Kinoshita, K. ; Pomianowski, P. ; et al.
Phys.Rev.D 53 (1996) 4734-4746, 1996.
Inspire Record 401599 DOI 10.17182/hepdata.47241

This paper describes new measurements from CLEO of the inclusive B→Ds+X branching fraction as well as the B+→Ds(*)+D¯(*)0 and B0→Ds(*)+D(*)− branching fractions. The inclusive branching fraction is B(B→Ds+X)=(12.11±0.39±0.88±1.38)% where the first error is statistical, the second is the systematic error, and the third is the error due to the uncertainty in the Ds+→φπ+ branching fraction. The branching fractions for the B→Ds(*)+D¯(*) modes are found to be between 0.9% and 2.4% and are significantly more precise than previous measurements. The sum of the B→Ds(*)+D¯(*) branching fractions is consistent with the results of fits to the inclusive Ds+ momentum spectrum. Factorization is used to arrive at a value for fDs, the Ds+ decay constant. © 1996 The American Physical Society.

1 data table
Table 1

FORMFACTOR(NAME=FP,C=DECAY CONSTANT) is pseudoscalar meson decay constant. Three different methods are used: 1) C=MUNU: D/S+ --> MU+ NUMU, 2) C = ENU: B --> D/S+ D*BAR / B --> D*BAR E+ NU, and 3) C = PI : B --> D/S+ D*BAR / B0 - -> PI+(RHO+) D*BAR-. The F(D/S) is evaluated from B decay assuming the factorization.


Electromagnetic form-factors of the proton between 5 and 50 1/fm-squared

Berger, Christoph ; Gersing, E. ; Knop, G. ; et al.
Phys.Lett.B 28 (1968) 276-278, 1968.
Inspire Record 56842 DOI 10.17182/hepdata.29174

The external beam of the 2.5 GeV-electron-synchrotron has been used to measre elastic electron proton scattering at four-momentum-transfers between 15 and 50 fm −2 . By combining these results with measurements at small angles at DESY, we have obtained the electric and magnetic form factors separately. Their ratio shows a deviation from the scaling law.

2 data tables
Table 1

No description provided.

Table 2

No description provided.