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Analyzing powers ( A y ) and spin-rotation-depolarization parameters ( D SS , D SL , D LS , D LL , D NN ) were determined for 500 MeV p + 2 H and p + 12 C inclusive quasielastic scattering at 10°, 15°, and 20° laboratory scattering angles. The p + 2 H data are consistent with the isospin-average of the proton-proton and proton-neutron scattering observables; the p + 12 C data are not. A relativistic plane wave impulse approximation calculation leads to better agreement with the p + 12 C spin-observables.

2 data tables match query

Table 1

Inclusive quasielastic p deut measurements.

Table 2

Inclusive quasielastic p c measurements.

rivet Analysis
Consistent measurements of alpha(s) from precise oriented event shape distributions.

The DELPHI collaboration Abreu, P. ; Adam, W. ; Adye, T. ; et al.

Eur.Phys.J.C 14 (2000) 557-584, 2000.

Inspire Record 522656 DOI 10.17182/hepdata.13245

An updated analysis using about 1.5 million events recorded at $\sqrt{s} = M_Z$ with the DELPHI detector in 1994 is presented. Eighteen infrared and collinear safe event shape observables are measured as a function of the polar angle of the thrust axis. The data are compared to theoretical calculations in ${\cal O} (\alpha_s^2)$ including the event orientation. A combined fit of $\alpha_s$ and of the renormalization scale $x_{\mu}$ in $\cal O(\alpha_s^2$) yields an excellent description of the high statistics data. The weighted average from 18 observables including quark mass effects and correlations is $\alpha_s(M_Z^2) = 0.1174 \pm 0.0026$. The final result, derived from the jet cone energy fraction, the observable with the smallest theoretical and experimental uncertainty, is $\alpha_s(M_Z^2) = 0.1180 \pm 0.0006 (exp.) \pm 0.0013 (hadr.) \pm 0.0008 (scale) \pm 0.0007 (mass)$. Further studies include an $\alpha_s$ determination using theoretical predictions in the next-to-leading log approximation (NLLA), matched NLLA and $\cal O(\alpha_s^2$) predictions as well as theoretically motivated optimized scale setting methods. The influence of higher order contributions was also investigated by using the method of Pad\'{e} approximants. Average $\alpha_s$ values derived from the different approaches are in good agreement.

33 data tables match query

Table 1

The weighted value of ALPHA-S from all the measured observables using experimentally optimized renormalization scale values and corrected for the b-mass toleading order.

Table 2

The value of ALPHA-S derived from the JCEF and corrected for heavy quark mass effects. The quoted errors are respectively due to experimental error, hadronization, renormalization scale and heavy quark mass correction uncertainties.

Table 3

Energy Energy Correlation EEC.

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CM Energies (GeV)

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LEADING PARTICLES, ASSOCIATIVE MULTIPLICITIES AND PARTIAL INELASTIC FACTORS IN PI- N AND PI- C INTERACTIONS AT 40-GEV/C. (IN RUSSIAN)

CHARACTERISTICS OF SECONDARY PROTONS FROM INELASTIC INTERACTIONS OF PROTONS WITH NE NUCLEI AND NUCLEONS AT THE MOMENTUM P = 300-GEV/C. (IN RUSSIAN)

SPECTRUM OF LEADING PARTICLES IN PI- N AND PI- C INTERACTIONS AT 40-GEV/C. (IN RUSSIAN)

OBSERVATION OF TWO PROTON CORRELATIONS IN P NE INTERACTIONS AT 300-GEV/C

POSSIBLE OBSERVATION OF NARROW TWO PROTON RESONANCES IN HADRON NUCLEUS INTERACTIONS

CORRELATIONS OF SECONDARY PROTONS IN P NE-20 INTERACTIONS AT 300-GEV/C

Observation of cumulative isobars in p Ne-20 interactions at 300-GeV/c

Search for Dibaryon Resonances in Hadron Nucleus Interactions. (In Russian)

Inclusive quasielastic spin observables for p (polarized) + H-2, C-12 at 500-MeV

rivet Analysis
Consistent measurements of alpha(s) from precise oriented event shape distributions.