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Coupling Strengths of Weak Neutral Currents From Leptonic Final States at 22-{GeV} and 34-{GeV}

The CELLO collaboration Behrend, H.J. ; Chen, C. ; Fenner, H. ; et al.

Z.Phys.C 16 (1983) 301, 1983.

Inspire Record 180756 DOI 10.17182/hepdata.16385

Differential cross sections fore+e−→e+e−, τ+, τ- measured with the CELLO detector at$\left\langle {\sqrt s } \right\rangle= 34.2GeV$ have been analyzed for electroweak contributions. Vector and axial vector coupling constants were obtained in a simultaneous fit to the three differential cross sections assuming a universal weak interaction for the charged leptons. The results,v2=−0.12±0.33 anda2=1.22±0.47, are in good agreement with predictions from the standardSU(2)×U(1) model for$\sin ^2 \theta _w= 0.228$. Combining this result with neutrino-electron scattering data gives a unique axial vector dominated solution for the leptonic weak couplings. Assuming the validity of the standard model, a value of$\sin ^2 \theta _w= 0.21_{ - 0.09}^{ + 0.14}$ is obtained for the electroweak mixing angle. Additional vector currents are not observed (C<0.031 is obtained at the 95% C.L.).

2 data tables

Table 1

No description provided.

Table 2

Combined MU and TAU asymmetry. See PL 114B(1982)282 (<a href=http://durpdg.dur.ac.uk/scripts/reacsearch.csh/TESTREAC/red+1234> RED = 1234 </a>) and ZP C14(1982)283 (<a href=http://durpdg.dur.ac.uk/scripts/reacsearch.csh/TESTREAC/red+1245> RED = 1245 </a>) for individual asymmetry measurements.

rivet Analysis
Angular Correlations in gamma Gamma ---> rho0 rho0 Near Threshold

The TASSO collaboration Althoff, M. ; Braunschweig, W. ; Gather, K. ; et al.

Z.Phys.C 16 (1982) 13, 1982.

Inspire Record 180755 DOI 10.17182/hepdata.16415

We present an analysis ofρ0ρ0 production by two photons in theρ0ρ0 invariant mass range from 1.2 to 2.0 GeV. From a study of the angular correlations in the process γγ→ρ0ρ0→π−π+π− we exclude a dominant contribution fromJP=0− or 2− states. The data indicate sizeable contributions fromJP=0+ for four pion massesM4π<1.7 GeV and fromJP=2+ forM4π>1.7 GeV. The data are also well described by a model with isotropic production and uncorrelated isotropic decay of theρ0,s. The cross section stays high below the nominalρ0ρ0 threshold, i.e.M4π<1.5 GeV. The matrix element forρ0ρ0 production is found to decrease steeply with increasingM4π. Upper limits for the couplings of the ι(1440) and Θ(1640) to γγ andρ0ρ0 are given:Γ(ι→γγ)·B(ι→ρ0ρ0)<1.0 keV andΓ(Θ→γγ)

2 data tables

Table 1

ASSUMING ISOTROPIC RHO0 RHO0 PRODUCTION AND ISOTROPIC RHO DECAY.

Table 2

CROSS SECTIONS FOR DIFFERENT SPIN-PARITY CONTRIBUTIONS.

Search for charmed particles with the heavy liquid bubble chamber BIBC

Badertscher, A. ; Hahn, B. ; Hugentobler, E. ; et al.

Phys.Lett.B 123 (1983) 471-476, 1983.

Inspire Record 179578 DOI 10.17182/hepdata.30743

In a search for short lived particles with a high resolution C 3 F 8 bubble chamber and a streamer chamber, 21 charmed meson candidates produced by 340 GeV cπ − have been identified. The cross section for associated charm production is (28±11) μb per nucleon assuming a linear A -dependence. The mean lifetimes of the D mesons in units of 10 −13 s are τ( D 0 , D ̄ 0 ) = 4.1 −1.3 +2.6 ± 0.5, τ( D ± ) = 6.3 −2.3 4.8 ± 1.5 .

1 data table

Table 1

LINEAR A DEPENDENCE ASSUMED FROM PROD. OF 33+-13 D-DBAR EVENTS.

DIRECT OBSERVATION OF THE DECAY h0 (2040) ---> anti-p p

Lamsa, J.W. ; Firestone, A. ; Anderson, E.W. ; et al.

Phys.Rev.D 26 (1982) 1769, 1982.

Inspire Record 12398 DOI 10.17182/hepdata.23947

We have observed the decay h0(2040)→p¯p in the reaction π+n→p¯pp at 10 GeV/c detected in the large-aperture solenoid spectrometer at SLAC. We have measured the product of the cross section and branching ratio, σ(π+n→h0(2040)p)B(h0(2040)→p¯p), to be 0.84±0.17 μb. The moments of the angular distribution are consistent with the quantum numbers of the h0 meson being JPC=4++ and IG=0+.

1 data table

Table 1

Axis error includes +- 0.0/0.0 contribution (?/////BREIT-WIGNER PLUS POLYNOMIAL BACKGROUND FITTED TO P AP MASS DISTRIBUTION/REQUIRED THE MOMENTUM OF ONE P AND ONE AP TO BE >3 GEV, AND ONLY USED FOR THE FASTER P IN THE P AP MASS DISTRIBUTION).

rivet Analysis
Measurement of R in $e^+ e^-$ Annihilation for $\sqrt{s}$ Between 7.4-{GeV} and 9.4-{GeV}

The LENA collaboration Niczyporuk, B. ; Jakubowski, Z. ; Nowak, G. ; et al.

Z.Phys.C 15 (1982) 299, 1982.

Inspire Record 179431 DOI 10.17182/hepdata.16412

The rationR=σ(e+e−→hadrons)/σ(e+e−→ µ+ µ−) was measured with the LENA detector at DORIS in a scan between 7.40 and 7.48 GeV and between 8.67 and 9.43 GeV center of mass energies. Corrected for QED radiative effects,R is found to be constant with an average value ofR=3.37 ±0.06stat±0.23syst. No narrow resonances withΓee(Γhad/Γtot)⊗0.30 keV (95% C.L.) and no steps have been observed. Based on this value ofR, revised values for υ(1S) resonance parameters are presented.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

NUMERICAL VALUES GIVEN IN APPENDIX IN PREPRINT. STATISTICAL ERRORS ONLY.

Observation of a $K^*$ Resonance at 2088-{MeV}

The Birmingham-CERN-Glasgow-Michigan State-Paris collaboration Baubillier, M. ; Bloodworth, I.J. ; Burns, A. ; et al.

Phys.Lett.B 118 (1982) 447, 1982.

Inspire Record 179090 DOI 10.17182/hepdata.30838

In a high statistics (180 events/μb) bubble chamber study of the reaction fx K − p → K 0 π − p at 8.25 GeV c , we observe a K 0 π − state at 2088±20 MeV with a width 170 +100 −50 MeV, produced with a cross section of 3.6±1.2 μ b. In addition we observe this state in the channels K ∗ (890)ππ , ϱ K π , ω K π with a combined cross section of 7.1±2.6 μ b, and possibly K ∗ (890)πππ .

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Inclusive Resonance Production in $K^+ p$ Interactions at 70-{GeV}/$c$

The Brussels-Genoa-Mons-Nijmegen-Serpukhov-CERN collaboration Barth, M. ; De Clercq, C. ; De Wolf, E.A. ; et al.

Nucl.Phys.B 223 (1983) 296, 1983.

Inspire Record 183148 DOI 10.17182/hepdata.33962

None

20 data tables

Table 1

Table 2

Table 3

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INCLUSIVE PRODUCTION OF pi- MESONS IN n p INTERACTIONS AT P (n) = 1-GeV/c TO 5-GeV/c

Abdivaliev, A. ; Besliu, K. ; Gruia, S. ; et al.

JINR-P1-82-507, 1982.

Inspire Record 180646 DOI 10.17182/hepdata.17442

None

8 data tables

Table 1

Table 2

Table 3

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rivet Analysis
Inclusive $\rho^0$ Production in $e^+ e^-$ Annihilation at High-energy

The TASSO collaboration Brandelik, R. ; Braunschweig, W. ; Gather, K. ; et al.

Phys.Lett.B 117 (1982) 135-140, 1982.

Inspire Record 179022 DOI 10.17182/hepdata.6664

We have observed ϱ 0 production in e + e − annihilation to hadrons at high energies. The differential cross section at a centre of mass energy W , of 34 GeV, is presented. In the range 0.2< x < 0.7, we measure 0.33 ± 0.06 (stat.) ± 0.07 (syst.), 0.22 ± 0.06 ± 0.05 and 0.22 ± 0.02 ± 0.05 ϱ 0 /event at W = 14, 22 and 34 GeV respectively.

10 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

INTEGRATION OVER RESTRICTED X RANGE.