Augustin, I.
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Total Cross-sections of Charged Current Neutrino and Anti-neutrino Interactions on Isoscalar Nuclei

The CHARM collaboration Allaby, J.V. ; Amaldi, U. ; Barbiellini, G. ; et al.
Z.Phys.C 38 (1988) 403-410, 1988.
Inspire Record 252954 DOI 10.17182/hepdata.15652

New measurements of the total crosssections of charged-current interactions of muonneutrinos and antineutrinos on isoscalar nuclei have been performed. Data were recorded in an exposure of the CHARM d

2 data tables
Table 1

No description provided.

Table 2

No description provided.


THE STUDY OF THE NEUTRON STRANGE PARTICLES AND gamma QUANTUM PRODUCTION IN anti-d d INTERACTIONS AT 12-GeV/c

Batyunya, B.V. ; Boguslavsky, I.V. ; Bruncko, D. ; et al.
JINR-P1-87-802, 1987.
Inspire Record 253863 DOI 10.17182/hepdata.9417

None

9 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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THE STUDY OF anti-n n INTERACTIONS AT 6.1-GeV/c

The Dubna-Bucharest-Yerevan-Kosice-Moscow-Prague-Sofiya collaboration Batyunya, B.V. ; Boguslavsky, I.V. ; Bruncko, D. ; et al.
Sov.J.Nucl.Phys. 48 (1988) 475, 1988.
Inspire Record 253864 DOI 10.17182/hepdata.9420

None

21 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of $D$(s)* - $D$(s) Mass Difference

The ARGUS collaboration Albrecht, H. ; Binder, U. ; Bockmann, P. ; et al.
Phys.Lett.B 207 (1988) 349-354, 1988.
Inspire Record 251558 DOI 10.17182/hepdata.29950

Using the ARGUS detector at DORIS, we observe the production of D ∗+ s mesons in e + e − annihilation through their subsequent decays to a D + s and a photon. Photons which convert in the beam pipe or drift chamber inner wall are used to obtain a high precision measurement of the D ∗+ s -D + s mass difference, while photons detected in the shower counters are used to determine the production cross section, and to provide an independent measurement of the D ∗+ s -D + s mass difference. The observed D ∗+ s - D + s mass difference is 142.5±0.8±1.5 MeV/ c 2 , and σ(e + e − →D ∗+ s X)·BR(D ∗+ s →D + s γ)(·BR(D + s →φπ + ) is 4.4±1.1±1.0 pb at 10.2 GeV. The width of the D ∗+ s is less than 4.5 MeV/ c 2 at 90% confidence level.

1 data table
Table 1

Cross sections uncorrected for branching ratios.


Charge Asymmetry Measurement in $e^+ e^- \to \mu^+ \mu^-$ and $\tau^+ \tau^-$ Reactions at $\sqrt{s}=52$-{GeV}

The TOPAZ collaboration Adachi, I. ; Aihara, H. ; Dijkstra, H.B. ; et al.
Phys.Lett.B 208 (1988) 319-323, 1988.
Inspire Record 251920 DOI 10.17182/hepdata.29948

The reactions e + e − → μ + μ − and τ + τ − were measured at s =52 GeV and 55 GeV by using the TOPAZ detector at TRISTAN. For the combined data, the observed charge asymmetry is −0.29±0.13 and the total cross section is 27.9±3.0 (stat.)±0.8 (syst.) pb for μ + μ − production, and those for τ + τ − production are −0.20±0.14 and 35.7±4.3 (stat.)±2.4 (syst.)pb, respectively. These values are consistent with predictions by the standard model of electroweak interactions.

6 data tables
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Measurement of the Processes $e^+ e^- \to e^+ e^-$ and $e^+ e^- \to \gamma \gamma$ at $\sqrt{s}=52$-{GeV}

The TOPAZ collaboration Adachi, I. ; Aihara, H. ; Dijkstra, H.B. ; et al.
Phys.Lett.B 200 (1988) 391-396, 1988.
Inspire Record 251921 DOI 10.17182/hepdata.30010

Differential cross sections for the processes e + e − → e + e − (Bhabha scattering) and e + e − → γγ have been measured with the TOPAZ detector at s =52 GeV . The results agree with the predictions of quantum electrodynamics (QED). The lower limits for the QED cut-off parameters have been obtained to be Λ + ⩾115 GeV and Λ − ⩾236 GeV for Bhabha scattering, and Λ + ⩾94 GeV and Λ − ⩾59 GeV for the reaction e + e − → γγ .

4 data tables
Table 1

Statistical errors only.

Table 2

Statistical errors only.

Table 3

Ratio of experimental data to prediction for lowest order QED. Statistical errors only.

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A Measurement of Cross-sections for $^{16}$O Al and $^{16}$O Pb Interactions at 60-{GeV}/$c$ and 200-{GeV}/$c$ Per Nucleon

The NA36 collaboration Barnes, P.D. ; Blaes, R. ; Braun, H. ; et al.
Phys.Lett.B 206 (1988) 146-150, 1988.
Inspire Record 252004 DOI 10.17182/hepdata.6494

Cross sections are measured for 16 O collisions with A1 and Pb. Dependences on beam momentum and atomic number are compared with data obtained at much lower beam momenta.

4 data tables
Table 1

MODEL DEPENDENT ESTIMATION.

Table 2

No description provided.

Table 3

No description provided.

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Search for New Heavy Quarks at the CERN Proton - anti-Proton Collider

The UA1 collaboration Albajar, C. ; Albrow, M.G. ; Allkofer, O.C. ; et al.
Z.Phys.C 37 (1988) 505-525, 1988.
Inspire Record 250763 DOI 10.17182/hepdata.15651

A search has also been made for a fourth generation, charge 1/3 quark (b'). Assuming that theb' mass is smaller than that of the top quark and that it can-not be produced inW decays, the mass limits, using the above procedures, are respectivelymb'>32 GeV/c2 andmb'>44 GeV/c2, both at 95% confidence level.

0 data tables

Study of Heavy Flavor Production in Events With a Muon Accompanied by Jet(s) at the {CERN} Proton - Anti-proton Collider

The UA1 collaboration Albajar, C. ; Albrow, M.G. ; Allkofer, O.C. ; et al.
Z.Phys.C 37 (1988) 489-503, 1988.
Inspire Record 250762 DOI 10.17182/hepdata.15677

We present a study of heavy flavour (charm and beauty) production using data collected with the UA1 detector at the CERN Proton-Antiproton collider at a centre-of-mass energy of 630 GeV for an integrated luminosity of 556 nb−1. This follows our earlier study ofb\(\bar b\) andc\(\bar c\) production in dimuon events and the evidence for mixing betweenB0 and\(\bar B^0 \) states. Properties of an inclusive sample of events containing a muon withpT>6 GeV/c are compared with QCD predictions for heavy flavour production, using the ISAJET Monte Carlo program. The predicted largepT muon yield from heavy flavour production and decay agrees with the data to within 30%. For events with a muon ofpT>10 GeV/c and at least one jet withET>10 GeV, we measure the ratio charm/(charm+beauty) to be (24±8±9)%. We also show that the correlations observed between the two heavy quark jets expected by flavour conservation are consistent with the mixture of lowest and higher order QCD processes. We study in detail the topological and kinematic properties of a subsample of events containing a highpT muon and one or more jets. The good agreement of the theoretical predictions with our data in a region dominated by the production of charm and beauty shows that one of the main background sources to a new heavy quark signature is well understood.

3 data tables
Table 1

No description provided.

Table 2

Numerical values supplied by K.Wacker. Muon spectrum with at least one jet with PT > 12 GeV/c.

Table 3

No description provided.


Search for Top Quark in e+ e- Collisions at s**(1/2) = 52-GeV

The TOPAZ collaboration Adachi, I. ; Aihara, H. ; Dijkstra, H.B. ; et al.
Phys.Rev.Lett. 60 (1988) 97, 1988.
Inspire Record 251830 DOI 10.17182/hepdata.20141

We searched for possible signatures of top-quark production in 508 e+e− hadronic annihilation events collected at s=52 GeV by the TOPAZ detector at the KEK e+e− collider TRISTAN. The observed hadronic cross section and shape of hadronic events are consistent with the standard-model predictions without top quarks. A lower limit (95% confidence level) on the mass of the lightest top meson is set at 25.8 GeV.

1 data table
Table 1

No description provided.