Crystal Ball
E+ E- Scattering
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rivet Analysis
Measurement of the direct photon spectrum from Upsilon (1S) decays

The Crystal Ball collaboration Bizzeti, A. ; Schütte, J. ; Antreasyan, D. ; et al.
Phys.Lett.B 267 (1991) 286-292, 1991.
Inspire Record 315873 DOI 10.17182/hepdata.45174

None

1 data table
Table 1

No description provided.


Measurement of the decay of the Upsilon (1S) and Upsilon (2S) resonances to muon pairs

The Crystal Ball collaboration Kobel, M. ; Antreasyan, D. ; Bartels, H.W. ; et al.
Z.Phys.C 53 (1992) 193-206, 1992.
Inspire Record 306832 DOI 10.17182/hepdata.14771

Using the Crystal Ball detector at thee+e− storage ring DORIS II, we have measured the branching fraction to muon pairsBμμ of the Υ(

2 data tables
Table 1

Corrected cross section. Statistical and point to point systematic errors combined. Additional systematic error given above. The storage ring SQRT(S) has a 7.9 +- 0.2 MeV energy spread around the values given.

Table 2

Corrected cross section. Statistical and point to point systematic errors combined. Additional systematic error given above.The storage ring SQRT(S) has a 8.2 +- 0.3 MeV energy spread around the values given.


rivet Analysis
Measurement of pi0 and eta meson production in e+ e- annihilation at s**(1/2) near 10-GeV

The Crystal Ball collaboration Bieler, Ch. ; Antreasyan, D. ; Bartels, H.W. ; et al.
Z.Phys.C 49 (1991) 225-234, 1991.
Inspire Record 297905 DOI 10.17182/hepdata.15082

We present a study of inclusive π0 and ŋ production ine+e− annihilation at

6 data tables
Table 1

Particle multiplicities in the continuum.

Table 2

Particle multiplicities in the UPSILON (1S).

Table 3

Inclusive pi0 spectra in the continuum.

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rivet Analysis
The Electron Spectrum From $B$ Meson Decays

The Crystal Ball collaboration Wachs, K. ; Antreasyan, D. ; Bartels, H.W. ; et al.
Z.Phys.C 42 (1989) 33, 1989.
Inspire Record 263581 DOI 10.17182/hepdata.45204

The Crystal Ball Collaboration has measured the energy spectrum of electrons from semileptonicB meson decays at thee+e− storage ring DORIS II. Branching ratios and weak mixing angles of the Kobayashi-Maskawa matrix are determined using several models for the hadronic matrix elements. We obtain the branching ratio for semileptonic.B decays to charmed states BR(B→evXc)=(11.7±0.4±1.0)%. Our result for the corresponding Kobayashi-Maskawa matrix element is |Vcb|=0.052±0.006. The model dependence of both results is included in the error. We have not observed semileptonicB decays to non-charmed mesons. Analyzing the measured electron spectrum above 2.4 GeV, where nob→c decays contribute, we find BR(B→evXu)/BR(B→evXc)<6.5% at the 90% confidence level. This corresponds to an upper limit |Vub/Vcb|<0.21.

1 data table
Table 1

The errors quoted are statistical only.


rivet Analysis
Determination of $\gamma (e e$) of the $\Upsilon$ (1s) and $\Upsilon$ (2s) Resonances and Measurement of R at $W=9$.39-{GeV}

The Crystal Ball collaboration Jakubowski, Z. ; Antreasyan, D. ; Bartels, H.W. ; et al.
Z.Phys.C 40 (1988) 49, 1988.
Inspire Record 261078 DOI 10.17182/hepdata.15560

Using the Crystal Ball detector operating at the DORIS II storage ring we have measured the leptonic partial widthsГeeof the Υ(1S) and Υ(2S) reson

1 data table
Table 1

No description provided.