Shipbaugh, C.
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Observation of the Decay $D(s$)+ $\to \eta^\prime \pi^+$

The ARGUS collaboration Albrecht, H. ; Ehrlichmann, H. ; Glaser, R. ; et al.
Phys.Lett.B 245 (1990) 315-320, 1990.
Inspire Record 295620 DOI 10.17182/hepdata.45150

Using the ARGUS detector at the e + e - storage ring DORIS II at DESY, we have observed the decay D s + → η'π + in two decay modes of the η'. We measure the ratio of branching ratios BR(D s + → η'π + )/BR(D s + → Øπ + ) to be 2.5±0.5±0.3.

1 data table
Table 1

The cross section times Br(D/S+ --> ETAPRIME PI+), but is not included the ETAPRIME branching ratio.


Measurement of the Transverse Momentum Distributions of $W$ and $Z$ Bosons at the {CERN} $\bar{p} p$ Collider

The UA2 collaboration Alitti, J. ; Ansari, R. ; Ansorge, R.E. ; et al.
Z.Phys.C 47 (1990) 523-532, 1990.
Inspire Record 296184 DOI 10.17182/hepdata.15150

The transverse momentum distributions ofW andZ bosons produced in\(\bar pp\) collisions at\(\sqrt s= 630 GeV\) are examined. Comparisons are made with QCD predictions, and good agreement is found. The fraction ofW bosons produced withpT>25 GeV is found to be 3.8±0.6(stat)−1.3+0.9(syst)%.

2 data tables
Table 1

No description provided.

Table 2

Combining the cross section for pbar p --> W X * BR(W --> E NU) given in Alitti et al, ZP C47 (90) 11. (660 +- 15 (DSYS=37) pb).


rivet Analysis
STUDY OF p p AND LAMBDA LAMBDA PRODUCTION IN e+ e- ANNIHILATION AT 10-GeV CENTER-OF-MASS ENERGY

The ARGUS collaboration Albrecht, H. ; Ehrlichmann, H. ; Glaser, R. ; et al.
Z.Phys.C 49 (1991) 349-354, 1991.
Inspire Record 295621 DOI 10.17182/hepdata.15433

None

8 data tables
Table 1

Ratio per multihadron event for continuum data.

Table 2

Ratio per multihadron event for continuum data.

Table 3

Ratio per multihadron event for continuum data.

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Jet fragmentation properties of anti-p p collisions at S**(1/2) = 1.8-TeV

The CDF collaboration Abe, F. ; Amidei, D. ; Apollinari, G. ; et al.
Phys.Rev.Lett. 65 (1990) 968-971, 1990.
Inspire Record 297585 DOI 10.17182/hepdata.19919

The charged-particle fractional momentum distribution within jets, D(z), has been measured in dijet events from 1.8-TeV p¯p collisions in the Collider Detector at Fermilab. As expected from scale breaking in quantum chromodynamics, the fragmentation function D(z) falls more steeply as dijet invariant mass increases from 60 to 200 GeV/c2. The average fraction of the jet momentum carried by charged particles is 0.65±0.02(stat)±0.08(syst).

1 data table
Table 1

No description provided.


A Measurement of Global Event Shape Distributions in the Hadronic Decays of the $\Z^0$

The OPAL collaboration Akrawy, M.Z. ; Alexander, G. ; Allison, John ; et al.
Z.Phys.C 47 (1990) 505-522, 1990.
Inspire Record 295613 DOI 10.17182/hepdata.15152

We present measurements of global event shape distributions in the hadronic decays of theZ0. The data sample, corresponding to an integrated luminosity of about 1.3 pb−1, was collected with the OPAL detector at LEP. Most of the experimental distributions we present are unfolded for the finite acceptance and resolution of the OPAL detector. Through comparison with our unfolded data, we tune the parameter values of several Monte Carlo computer programs which simulate perturbative QCD and the hadronization of partons. Jetset version 7.2, Herwig version 3.4 and Ariadne version 3.1 all provide good descriptions of the experimental distributions. They in addition describe lower energy data with the parameter values adjusted at theZ0 energy. A complete second order matrix element Monte Carlo program with a modified perturbation scale is also compared to our 91 GeV data and its parameter values are adjusted. We obtained an unfolded value for the mean charged multiplicity of 21.28±0.04±0.84, where the first error is statistical and the second is systematic.

9 data tables
Table 1

Corrected Thrust distribution.

Table 2

Corrected Major distribution.

Table 3

Corrected Minor distribution.

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A Luminosity Independent Measurement of the $\bar{p} p$ Total Cross-section at $\sqrt{s}=1$.8-tev

The E-710 collaboration Amos, Norman A. ; Avila, C. ; Baker, W.F. ; et al.
Phys.Lett.B 243 (1990) 158-164, 1990.
Inspire Record 27474 DOI 10.17182/hepdata.29696

We report a measurement of the p p total cross section at √ s =1.8 TeV using a luminosity-independent method. Our result is σ T =72.1±3.3 mb ; we also derive the total elastic cross section σ el =16.6±1.6 mb. A value is obtained for the total single diffraction cross section of 11.7±2.3 mb.

4 data tables
Table 1

No description provided.

Table 2

Assuming RHO = 0.145.

Table 3

No description provided.

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Inverse Muon Decay, $\nu_\mu e \to \mu^- \nu_e$, at the Fermilab Tevatron

Mishra, S.R. ; Bachmann, K.T. ; Blair, R.E. ; et al.
Phys.Lett.B 252 (1990) 170-176, 1990.
Inspire Record 296115 DOI 10.17182/hepdata.15430

We report an improved measurement of the inverse muon decay process, ν μ +e→ μ − + ν e , at the Fermilab Tevatron. The rate of this reaction with respect to the ν μ -N charged current interaction is measured to be (0.1245±0.0057(stat.)±0.0031 (sys.)) × 10 −2 . The measurement confirms the standard model predictions for the Lorentz structure of the weak current, the helicity of the neutrino, and the energy dependence of the cross section.

4 data tables
Table 1

Data from the Quadruple Triplet Neutrino beam (QTB).

Table 2

Data from the Narrow Band Beam(NBB).

Table 3

Weighted average of the QTB and NBB data.

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Anti-proton - proton elastic scattering at s**(1/2) = 1.8-TeV from |t| = 0.034-GeV/c**2 to 0.65-GeV/c**2

The E-710 collaboration Amos, Norman A. ; Avila, C. ; Baker, W.F. ; et al.
Phys.Lett.B 247 (1990) 127-130, 1990.
Inspire Record 297541 DOI 10.17182/hepdata.29660

The differential cross section for elastic antiproton—proton scattering at s =1.8 TeV has been measured over the t range 0.034⩽| t |⩽0.65 (GeV/ c ) 2 . A logarithmic slope parameter, B , of 16.3±0.3 (GeV/ c ) −2 is obtained. In contrast to lower energy experiments, no change in slope is observed over this t range.

2 data tables
Table 1

Numerical values from FERMILAB-FN-562 suppliedto us by R. Rubinstein. Statistical errors only. t values at centre of each bin.

Table 2

Nuclear slope parameter. Error contains 0.3 GeV**-2 systematic uncertainty folded.


Photoproduction of the LAMBDA(c) charmed baryon

The NA14/2 collaboration Alvarez, M.P. ; Barate, R. ; Bloch, D. ; et al.
Phys.Lett.B 246 (1990) 256-260, 1990.
Inspire Record 296476 DOI 10.17182/hepdata.29677

In a photoproduction experiment using a mean photon energy of 100 GeV we have observed 29±8 Λ c ( Λ c ) charmed-baryon and antibaryon decays in the pK − π + ( p K + π − ) final state. Quasi two-body final states do not contribite significantly to this channel. The mass of the Λ c was measured to be 2281.7±2.7±2.6 MeV/ c 2 and its lifetime 0.18±0.03±0.03 ps. The ratio of Λ c D production, measured in this experiment, is significantly greater than that predicted by photon-gluon fusion and using a Lund model to describe the hadronization. This excess cannot be completely accounted for in this model, even using a Λ c branching fraction in pK π as high as 5%.

1 data table
Table 1

Result extrapolated to all lambda/c energies has large model dependent uncertainties.


Measurement of the analyzing power and the differential cross-section of the anti-p p charge exchange reaction at LEAR

Birsa, R. ; Bradamante, F. ; Dalla Torre-Colautti, S. ; et al.
Phys.Lett.B 246 (1990) 267-272, 1990.
Inspire Record 296501 DOI 10.17182/hepdata.29676

As part of a programme to study the spin structure of the p p→ n n channel, we have measured the analysing power A 0 n and the differential cross section at an incident antiproton beam momentum of 704 MeV/ c . The analysing power exhibits a remarkable angular dependence, which is poorly reproduced by the existing potential models.

2 data tables
Table 1

No description provided.

Table 2

No description provided.