Grilli, M.
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On the Possible Existence of a Vector Meson rho(1250)

Conversi, M. ; Paoluzi, L. ; Ceradini, F. ; et al.
Phys.Lett.B 52 (1974) 493-497, 1974.
Inspire Record 98127 DOI 10.17182/hepdata.27922

By combining new results obtained at C.M. energies of 1.2 and 1.3 GeV with previous data obtained at lower energies from the e + e − annihilation process e + e − → π + π − π o π o , we get an indication in favour of the existence of a new vector meson of the ϱ type, ϱ' (1250), the first daughter of the ϱ in the predictions of the Veneziano model. Further results on the annihilation process e + e − → π (1600) → π + π − π + π − are also presented.

1 data table match query
Table 1

NOTE THAT ABOVE 1.3 GEV, THE CROSS SECTION VALUES ARE CRITICALLY DEPENDENT ON THE ASSUMPTION OF A PHASE SPACE DISTRIBUTION FOR THE FINAL STATE. NOTE ALSO THAT THE RHOPRIME(1600)0 --> RHO EPSILON(700) --> PI+ PI- PI0 PI0 RESONANT CONTRIBUTION HAS BEEN SUBTRACTED OUT. THIS CORRECTION IS GREATEST (25 PCT) AT 1.5 GEV.


Asymmetry ratios in the photoproduction of π + by linearly polarized γ-rays in the energy range 200–400 MeV

Gorenstein, P. ; Grilli, M. ; Soso, F. ; et al.
Phys.Lett. 23 (1966) 394-396, 1966.
Inspire Record 1392866 DOI 10.17182/hepdata.30179

The asymmetry ratio for the process γ + p → n + π + by linearly polarized γ rays are reported for E γ = 200 − 400 MeV and for θ (production angle of π in the c.m. system) = 90°. The experimental results are compared with some recent theoretical predictions.

4 data tables match query
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Positive-pion photoproduction by linearly polarized $\gamma$ rays. I: experimental method and results

Grilli, M. ; Spillantini, P. ; Soso, F. ; et al.
Nuovo Cim. 54 (1968) 877-896, 1968.
Inspire Record 1185332 DOI 10.17182/hepdata.37567

The apparatus and the experimental method used for the measurements of the single-π+ photoproduction by linearly polarized γ rays are described. The present results on the asymmetry ratioA (θ) are summaized. The range covered by our results is θ=(30÷145)o (c.m.) andE γ=(200÷450) MeV.

2 data tables match query
Table 1

No description provided.

Table 2

No description provided.


$\Lambda^{0}$ polarization from the reaction $\gamma + p=K^{+} + \Lambda^{0}$ in the energy range (950÷1050) MeV

Borgia, B. ; Grilli, M. ; Joos, P. ; et al.
Nuovo Cim. 32 (1964) 218-223, 1964.
Inspire Record 1185014 DOI 10.17182/hepdata.37674

None

1 data table match query
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).


Muon pair production by electron-positron collisions in the gev region

Borgia, B. ; Ceradini, F. ; Conversi, M. ; et al.
Lett.Nuovo Cim. 3S2 (1972) 115-120, 1972.
Inspire Record 77432 DOI 10.17182/hepdata.37904

None

1 data table match query
Table 1

CONST(NAME=EXP/THEORY) is the experimental numbers divided by the theoretical predictions.


rivet Analysis
Total Hadronic Cross-section From $e^+ e^-$ Annihilation in the Total Center-of-mass Energy Range 1920-{MeV} - 3090-{MeV}

Bacci, C. ; Baldini-Celio, R. ; Capon, G. ; et al.
Lett.Nuovo Cim. 24 (1979) 324, 1979.
Inspire Record 133588 DOI 10.17182/hepdata.37911

None

1 data table match query
Table 1

THE TOTAL CROSS SECTION HAS BEEN CALCULATED FROM R.


$\Lambda^{0}$-polarization from the reaction $\gamma+p = \Lambda^{0}+K^{+}$ in the energy range (950÷1050)MeV

Grilli, M. ; Mezzetti, L. ; Nigro, M. ; et al.
Nuovo Cim. 38 (1965) 1467-1488, 1965.
Inspire Record 1185245 DOI 10.17182/hepdata.37616

We report some measurements of the Λ polarization in the reaction Υ+P=K+Λ+0, for 950

1 data table match query
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).


Spin observables in neutron proton elastic scattering.

Ahmidouch, A. ; Arnold, J. ; van den Brandt, B. ; et al.
Eur.Phys.J.C 2 (1998) 627-641, 1998.
Inspire Record 471273 DOI 10.17182/hepdata.11376

The analyzing power,$A_{oono}$, and the polarization transfer observables$K_{onno}$,$K_{os''so}$

20 data tables match query
Table 1

Position 'A' (see text for explanation).

Table 2

Position 'A' (see text for explanation).

Table 3

Position 'A' (see text for explanation).

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rivet Analysis
QCD analyses and determinations of alpha(s) in e+ e- annihilation at energies between 35-GeV and 189-GeV.

The JADE & OPAL collaborations Pfeifenschneider, P. ; Biebel, O. ; Movilla Fernandez, P.A. ; et al.
Eur.Phys.J.C 17 (2000) 19-51, 2000.
Inspire Record 513337 DOI 10.17182/hepdata.12882

We employ data taken by the JADE and OPAL experiments for an integrated QCD study in hadronic e+e- annihilations at c.m.s. energies ranging from 35 GeV through 189 GeV. The study is based on jet-multiplicity related observables. The observables are obtained to high jet resolution scales with the JADE, Durham, Cambridge and cone jet finders, and compared with the predictions of various QCD and Monte Carlo models. The strong coupling strength, alpha_s, is determined at each energy by fits of O(alpha_s^2) calculations, as well as matched O(alpha_s^2) and NLLA predictions, to the data. Matching schemes are compared, and the dependence of the results on the choice of the renormalization scale is investigated. The combination of the results using matched predictions gives alpha_s(MZ)=0.1187+{0.0034}-{0.0019}. The strong coupling is also obtained, at lower precision, from O(alpha_s^2) fits of the c.m.s. energy evolution of some of the observables. A qualitative comparison is made between the data and a recent MLLA prediction for mean jet multiplicities.

80 data tables match query
Table 1

Overall result for ALPHAS at the Z0 mass from the combination of the ln R-matching results from the observables evolved using a three-loop running expression. The errors shown are total errors and contain all the statistics and systematics.

Table 2

Weighted mean for ALPHAS at the Z0 mass determined from the energy evolutions of the mean values of the 2-jet cross sections obtained with the JADE and DURHAMschemes and the 3-jet fraction for the JADE, DURHAM and CAMBRIDGE schemes evaluted at a fixed YCUT.. The errors shown are total errors and contain all the statistics and systematics.

Table 3

Combined results for ALPHA_S from fits of matched predicitions. The first systematic (DSYS) error is the experimental systematic, the second DSYS error isthe hadronization systematic and the third is the QCD scale error. The values of ALPHAS evolved to the Z0 mass using a three-loop evolution are also given.

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Spin observables in elastic proton scattering from polarized He-3

Brash, E.J. ; Hausser, O. ; Cummings, W.J. ; et al.
Phys.Rev.C 52 (1995) 807-817, 1995.
Inspire Record 411136 DOI 10.17182/hepdata.25873

We have measured the absolute cross section σ(θ) and complete sets of spin observables A00ij in He3(p,p) elastic scattering at energies of 200 and 500 MeV. The observables depend on linear combinations of six complex scattering amplitudes for the p−3He system and provide a severe test of current reaction models. The in-scattering plane observables (A00mm, A00ll, A00lm, and A00ml) are all in quantitative disagreement with fully microscopic nonrelativistic optical model calculations and nonrelativistic distorted wave Born approximation calculations.

6 data tables match query
Table 1

A00N0 is analyzing power.

Table 2

A00N0 is analyzing power.

Table 3

A00NN is spin correlation parameter.

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