Barbaro-Galtieri, A
Muon production
[2.0, 5.0]
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CHARACTERISTICS OF NEUTRAL CURRENT INTERACTIONS INDUCED BY NEUTRINOS

Marriner, J. ; Barbaro-Galtieri, A. ; Bosetti, P. ; et al.
Phys.Rev.D 27 (1983) 2569-2579, 1983.
Inspire Record 195608 DOI 10.17182/hepdata.23834

The ratio of neutral-current to charged-current interactions is measured to be 0.30±0.03 for isoscalar targets, in good agreement with the results of previous experiments. Two independent methods are employed for isolating neutral-current events, one based on hadronic interactions, and the other on the momentum transverse to the hadron shower. The ratio of neutral-current interactions on neutrons to those on protons is measured to be 1.08±0.19.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Search for second generation leptoquarks in the dimuon plus dijet channel of p anti-p collisions at S**(1/2) = 1.8-TeV

The CDF collaboration Abe, F. ; Akimoto, H. ; Akopian, A. ; et al.
Phys.Rev.Lett. 81 (1998) 4806-4811, 1998.
Inspire Record 473168 DOI 10.17182/hepdata.42155

We report on a search for second generation leptoquarks (Phi_2) using a data sample corresponding to an integrated luminosity of 110 pb^{-1} collected at the Collider Detector at Fermilab. We present upper limits on the production cross section as a function of Phi_2 mass, assuming that the leptoquarks are produced in pairs and decay into a muon and a quark with branching ratio beta. Using a Next-to-Leading order QCD calculation, we extract a lower mass limit of M_{\Phi_2} > 202 (160) GeV$/c^{2} at 95% confidence level for scalar leptoquarks with beta=1(0.5).

1 data table
Table 1

Cross section times branching ratios.


Production of pi0 Mesons in K+ p Interactions at 8.2-GeV/c

Bartke, J. ; Eskreys, A. ; Figiel, J. ; et al.
Acta Phys.Polon.B 5 (1974) 689, 1974.
Inspire Record 90280 DOI 10.17182/hepdata.51679

Experimental results on $\pi^0$ production in $K^+$p interactions at 8.2 GeV/$c$ incident momentum are presented. Average $\pi^0$ multiplicities for given prong numbers are evaluated. They are consistent both with the corresponding results for pp interactions at 12 GeV/$c$ chosen for comparison because they have the same average prong number) and with a model where total multiplicity distributions are calculated from the Czyżewski--Rybicki formula and the charge branching ratios from the statistical model. Some averages over the $\pi^0$ momentum distribution are also evaluated. In particular it is found that $\pi^0$-s produced in two prong interactions go predominantly forward.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Study of the Reaction $\bar{\nu} p \to \mu^+ p \pi^-$

Barish, S.J. ; Brock, R. ; Engler, A. ; et al.
Phys.Lett.B 91 (1980) 161, 1980.
Inspire Record 8430 DOI 10.17182/hepdata.51335

We present data on the reaction ν p → μ + pπ − from an exposure of the Fermilab 15 ft hydrogen bubble chamber. The channel cross section for 5 GeV < E ν < 70 GeV and M( p π − ) < 1.9 GeV is σ = (27 ± 5) × 10 −40 cm 2 . This cross section is dominated by the I = 1 2 production amplitude.

1 data table
Table 1

No description provided.


$\tau$ Leptonic Branching Ratios and a Search for Goldstone Decay

The MARK-III collaboration Baltrusaitis, R.M. ; Becker, J. ; Blaylock, G. ; et al.
Phys.Rev.Lett. 55 (1985) 1842, 1985.
Inspire Record 215995 DOI 10.17182/hepdata.20284

Pairs of τ leptons produced at s=3.77 GeV have been studied in eμ, ee, and μμ final states. The leptonic branching ratios have been measured to be B(τ→eνν)=(18.2±0.7±0.5)% and B(τ→μνν)=(18.0±1.0±0.6)%. Limits have been set for the two-body decays τ→eG and τ→μG, where G is a light Goldstone boson.

7 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

A Reevaluation of the Gottfried sum

The New Muon collaboration Arneodo, M. ; Arvidson, A. ; Badelek, B. ; et al.
Phys.Rev.D 50 (1994) R1-R3, 1994.
Inspire Record 358419 DOI 10.17182/hepdata.71293

We present a new determination of the nonsinglet structure function ${\mathit{F}}_{2}^{\mathit{p}}$ - ${\mathit{F}}_{2}^{\mathit{n}}$ at ${\mathit{Q}}^{2}$=4 ${\mathrm{GeV}}^{2}$ using recently measured values of ${\mathit{F}}_{2}^{\mathit{d}}$ and ${\mathit{F}}_{2}^{\mathit{n}}$/${\mathit{F}}_{2}^{\mathit{p}}$. A new evaluation of the Gottfried sum is given, which remains below the simple quark-parton model value of 1/3.

4 data tables
Table 1

Errors of F2(D) are the estimated total uncertainties and those on the ratio and difference are statistical only.

Table 2

Values of the Gottfried Sum Rule integral (GS) defined as the integral between X(C=MIN) and X = 0.8 of (F2(P)-F2(N))DX/X.

Table 3

No description provided.

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Measurement of the Neutrino - Nucleon Anti-neutrino - Nucleon Total Cross-sections

Eichten, T. ; Faissner, H. ; Hasert, F.J. ; et al.
Phys.Lett.B 46 (1973) 274-280, 1973.
Inspire Record 84484 DOI 10.17182/hepdata.28054

The v and v nucleon total cross-sections have been determined as a function of energy using a sample of 2500 v and 950 v event. The results are compared with predictions of scaling and charge symmetry hypotheses.

2 data tables
Table 1

Measured charged current total cross section.

Table 2

Measured charged current total cross section.


Cross sections of common final states for K- p interactions at 8.25-GeV/c

The Athens-Democritus-Liverpool-Vienna collaboration Fry, J.R. ; Brankin, C. ; Matthews, R. ; et al.
Nucl.Phys.B 58 (1973) 408-419, 1973.
Inspire Record 83983 DOI 10.17182/hepdata.8005

Topological and channel cross sections are given for the more common final states produced in K − p interactions at 8.25 GeV/ c together with the single particle inclusive cross sections. We present cross sections for prominent resonances occurring in final states K N (nπ) and find the resonance fractions to be roughly independent of multiplicity.

3 data tables
Table 1

SE FOLDED.

Table 2

No description provided.

Table 3

No description provided.


A Precise Determination of the Electroweak Mixing Angle from Semileptonic Neutrino Scattering

The CHARM collaboration Allaby, J.V. ; Amaldi, U. ; Barbiellini, G. ; et al.
Z.Phys.C 36 (1987) 611, 1987.
Inspire Record 249672 DOI 10.17182/hepdata.15697

The cross-section ratio of neutral-current and charged-current semileptonic interactions of muon-neutrinos on isoscalar nuclei has been measured with the result:Rv=0.3093±0.0031 for hadronic energy larger than 4 GeV. From this ratio we determined the electroweak mixing angle sin2θW, wheremc is the charm-quark mass in GeV/c2. Comparison with direct measurements ofmw andmz determines the radiative shift of the intermediate boson mass Δr=0.077±0.025(exp.)±0.038(syst.), in agreement with the prediction. Assuming the validity of the electroweak standard theory we determined ϱ=0.990−0.013(mc−1.5)±0.009(exp.)±0.003(theor.).

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

STATISTICAL ERROR IN THE VALUE CITED IS REDUCING, WHEN CUT IS MORE STRINGENT?.


Anomalous Production of High-Energy Muons in e+ e- Collisions at 4.8-GeV

Cavalli-Sforza, M. ; Goggi, G. ; Mantovani, G.C. ; et al.
Phys.Rev.Lett. 36 (1976) 558, 1976.
Inspire Record 100744 DOI 10.17182/hepdata.21103

In view of the possible production of heavy leptons or charmed states in e+e− collisions, we searched for anomalous muons with momenta pμ≳1 GeV/c. The inclusive cross section for nch>~3 has an upper limit of 96 pb (assuming isotropy). For nch=2 and noncoplanarity > 20°, an excess of muonic events is observed, corresponding to (dσdΩ)|90°=23−9+12 pb/sr; the probability that known processes produce the observed events is 2×10−4.

1 data table
Table 1

No description provided.