HEPData Search

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The Reaction $\pi^- p \to K^0 \Sigma^0$ Up to 2375-{MeV}/$c$

Hart, J.C. ; Baker, R.D. ; Bell, Kenneth Watson ; et al.

Nucl.Phys.B 166 (1980) 73-83, 1980.

Inspire Record 143420 DOI 10.17182/hepdata.34550

Differential cross-section and polarization measurements for the reaction π − p → K 0 Σ 0 are presented from 1395 to 2375 MeV/ c incident beam momentum. The polarization data from an earlier experiment, from thershold to 1334 MeV/ c , have been re-analysed by an improved method leading to a substantial reduction in the errors.

4 data tables

Table 1

No description provided.

Table 2

TOTAL CROSS SECTIONS DERIVED FROM LEGENDRE POLYNOMIAL FITS TO ANGULAR DISTRIBUTIONS.

Table 3

LEGENDRE POLYNOMIAL FITS TO D(SIG)/DOMEGA.

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The Reaction $\pi^- p \to K^0 \Lambda^0$ Up to 2375-{MeV}/$c$: New Results and Analysis

Saxon, D.H. ; Baker, R.D. ; Bell, Kenneth Watson ; et al.

Nucl.Phys.B 162 (1980) 522-546, 1980.

Inspire Record 142072 DOI 10.17182/hepdata.34549

New data are presented on the reaction π − p→K 0 Λ 0 at 13 incident momenta between 1395 and 2375 MeV/ c . A partial-wave analysis has been performed using these data and previous data at lower momenta. The resulting resonance parameters are in broad agreement with recent πN analyses and with the predictions of SU(6) W × O(3) for the couplings.

5 data tables

Table 1

No description provided.

Table 2

TOTAL CROSS SECTION FROM LEGENDRE POLYNOMIAL FIT TO D(SIG)/DOMEGA. ERRORS INCLUDE 20 PCT SYSTEMATIC NORMALIZATION ERROR.

Table 3

LAMBDA USED TO ANALYZE POLARIZATION, ASSUMING 0.642 FOR THE DECAY ASYMMETRY PARAMETER.

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A Measurement of the Nucleon Structure Functions

Anderson, H.L. ; Fine, R.M. ; Heisterberg, R.H. ; et al.

Phys.Rev.D 20 (1979) 2645, 1979.

Inspire Record 141067 DOI 10.17182/hepdata.4434

Measurements have been made of the inclusive scattering of 96, 147, and 219 GeV muons from hydrogen, and of 147 GeV muons from deuterium. Results are presented for the nucleon structure function F2(x,Q2) [≡νW2(x,Q2)] for 10<ν<200 GeV and 0.2<Q2<80 GeV2. The value of F2 rises with Q2 at small x, and falls with Q2 at large x, in agreement with the ideas of quantum chromodynamics. An average value of the ratio σLσT≡R=0.52±0.35 has been obtained for the region 0.003<x<0.10 and 0.4<Q2<30 GeV2. The values of F2 from this experiment have been combined with those from other charged-lepton scattering experiments to determine moments of the structure functions. The variation with Q2 of these moments is used to derive values for Λ, taking into account corrections up to second order in αs. The fit to the data is very good.

38 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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STUDY OF THE CROSS-SECTION ASYMMETRY OF THE REACTION GAMMA D ---> N P BY POLARIZED PHOTONS IN THE ENERGY INTERVAL 400-MEV - 600-MEV (IN RUSSIAN)

Gorbenko, V.G. ; Zhebrovsky, Yu.V. ; Kolesnikov, L.Ya. ; et al.

Pisma Zh.Eksp.Teor.Fiz. 30 (1979) 130-132, 1979.

Inspire Record 146581 DOI 10.17182/hepdata.11198

None

1 data table

Table 1

No description provided.

PRODUCTION OF PHOTONS ASSOCIATED WITH THE PSI BY 217-GEV/C PI- MESONS

Kirk, T.B.W. ; Raja, R. ; Goodman, M. ; et al.

Phys.Rev.Lett. 42 (1979) 619-622, 1979.

Inspire Record 145303 DOI 10.17182/hepdata.20780

Dimuon production is studied in 217-GeV/c π−-hydrogen and π−-beryllium collisions with a lead-glass array to detect photons associated with the ψ. The ψ−γ mass spectrum shows a 2.6-standard-deviation excess of events above background at ∼3.5 GeV. This excess, if attributed to the decay χ(∼3.5)→ψγ, implies that 0.70±0.28 of the ψ's are produced via radiative decay of one of the χ states.

2 data tables

Table 1

E*D(SIG)/D(XL) is fitted by (1-X)**POWER.

Table 2

No description provided.

Production of High Momentum Mesons at Small Angles at a Center-of-mass Energy of 45-{GeV} at the {CERN} {ISR}

The CHLM collaboration Singh, J. ; Albrow, M.G. ; Barber, D.P. ; et al.

Nucl.Phys.B 140 (1978) 189-219, 1978.

Inspire Record 130229 DOI 10.17182/hepdata.55051

Inclusive cross sections for the production of π ± and K ± mesons in proton-proton collisions have been measured at a c.m. energy √ s = 45 GeV, in the range 0.41 < x < 0.95 and 0.35 < p T < 1.45 GeV, where x = 2 p L/√ s and p L , p T are the longitudinal and transverse components of the momentum of the meson. Within the measured range the p T dependence of the invariant cross section is essentially independent of x and weakly dependent on the type of particle. For all particles the invariant cross sections at fixed p T fall by three orders of magnitude between x = 0.4 and 0.95. Except at the highest values of x and p T , the statistical accuracy is better than 10%. The data are compared with a triple-Regge model and with a simple quark-parton model.

78 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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MUON SCATTERING AT 219-GEV AND THE PROTON STRUCTURE FUNCTIONS.

Gordon, B.A. ; Quirk, T.W. ; Anderson, H.L. ; et al.

Phys.Rev.Lett. 41 (1978) 615-618, 1978.

Inspire Record 132552 DOI 10.17182/hepdata.21001

Results on the protron structure function, F2, are presented for 0.3<q2<80.0 GeV2 and 10<ν<200 GeV. The results support the conclusions of earlier work at 97 and 147 GeV that scaling is violated. A new value for R=σSσT=0.44±0.25 has been obtained using all the Fermilab proton measurements.

1 data table

Table 1

No description provided.

Inelastic Diffractive Scattering at the CERN ISR

The CHLM collaboration Albrow, M.G. ; Bagchus, A. ; Barber, D.P. ; et al.

Nucl.Phys.B 108 (1976) 1-29, 1976.

Inspire Record 3424 DOI 10.17182/hepdata.8494

The properties of the diffractive peak observed in the mass spectra of systems recoiling against observed high-momentum protons emerging from pp collisions at the CERN ISR have been investigated. The cross sections in this peak have been found to have a steep t dependence which flattens out as | t | increases. The high mass side of the peak varies approximately as 1/ M 2 (where M is the missing mass of the recoiling system) and scales well in terms of the variable M 2 / s . The position of the maximum has been observed to move to lower values of M 2 / s as the kinematic boundary of this variable decreases with increasing s . The measured cross sections, integrated up to M 2 / s =0.05, rise by (15±5)% over the s range 549 to 1464 GeV 2 .

191 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.