Salvini, G.
Max results
Sort by Reverse order

Showing 10 of 6200 results

Date

Observation of the $D$, $e$ and Delta Mesons in $\pi^- p$ Interactions at 12-{GeV}/$c$ and 15-{GeV}/$c$

Corden, M.J. ; Dowell, J.D. ; Garvey, J. ; et al.
Nucl.Phys.B 144 (1978) 253-268, 1978.
Inspire Record 131142 DOI 10.17182/hepdata.22222

We have observed the D(1285), E(1420) and δ(975) mesons produced in 12 and 15 GeV/ c π − p interactions at the CERN Omega Spectrometer. Production cross sections and decay branching ratios are presented. Analysis of the decay D(1285) → δ (975) π favours a spin-parity assignment of 1 + .

3 data tables
Table 1

No description provided.

Table 2

CORRECTED FOR DECAY MODES OTHER THAN <ETA PI+ PI-> AND FOR THE UNOBSERVED PARTS OF THE T-DISTRIBUTION.

Table 3

No description provided.


New Results on Nucleon Double Diffraction at the {CERN} {ISR}

Goggi, G. ; Cavalli-Sforza, M. ; Conta, C. ; et al.
Phys.Lett.B 79 (1978) 165-169, 1978.
Inspire Record 131629 DOI 10.17182/hepdata.27380

Results on exclusive double diffraction dissociation in (N π ) and (N ππ ) final states are reported for neutron-neutron interactions at √ s = 26.4 GeV and for the proton-neutron interactions at √ s = 37.2 GeV. The data have been obtained at the CERN intersecting storage rings using split field magnet detector with proton-deuteron and deuteron-deuteron colliding beams. Factorization is shown to be verified to a very high degree in both mass- and t -differential cross-sections. The data confirm the previously observed rise in the proton-proton double diffractive cross-section as a function of c.m. energy.

3 data tables
Table 1

26.6 GEV/C INCIDENT BEAMS.

Table 2

26.6 GEV/C INCIDENT BEAMS.

Table 3

No description provided.


A2- Production in the Reaction $\pi^- p \to K^- K^0_S p$ at 9.8-{GeV} and 18.8-{GeV}

The CERN-Munich collaboration Chabaud, V. ; Hyams, B. ; Jones, C. ; et al.
Nucl.Phys.B 145 (1978) 349-366, 1978.
Inspire Record 131631 DOI 10.17182/hepdata.34875

Results of two spark chamber experiments on A 2 − production in the reaction π − p → K − K S 0 (→ π + π − )p at 9.8 and 18.8 GeV are presented. Decay angular distributions and differential cross sections are given, and the energy dependence of the cross section σ [ π − p → A 2 − (→ K − K 0 )p] is compared with results from π − p → A 2 − (→ 3 π )p.

4 data tables
Table 1

FITS WITH CONSTANT BACKGROUNDS. A TWO-PARAMETER LINEAR BACKGROUND GIVES MUCH LARGER ERRORS.

Table 2

INTEGRATED OVER M(K AK) = 1.20 TO 1.42 GEV.

Table 3

No description provided.

More…

Analysis of the Charge Exchange Reaction $p p \to (p \pi^+$) ($p \pi^-$) and of $\Delta^{++}$ Delta0 Production at the {CERN} {ISR}

Goggi, G. ; Cavalli-Sforza, M. ; Conta, C. ; et al.
Nucl.Phys.B 143 (1978) 365-394, 1978.
Inspire Record 131628 DOI 10.17182/hepdata.34885

We present the results of a systematic analysis of charge-exchange double dissociation in proton-proton collisions at the CERN Intersecting Storage Rings. The data, obtained with the Split-Field Magnet detector, cover the entire ISR energy range between s = 23 GeV and s = 63 GeV at five standard energies.

4 data tables
Table 1

CHARGE EXCHANGE DOUBLE DIFFRACTION DISSOCIATION OF PROTONS. THESE CROSS SECTIONS WERE REPORTED IN G. GOGGI ET AL., PL 72B, 265 (1977).

Table 2

No description provided.

Table 3

THE SEMI INCLUSIVE DENSITY MATRICES ARE ALSO GIVEN (P P --> DEL++ P PI- + DEL0 P PI+).

More…

Inclusive $\gamma$ and $\pi^0$ Production in $e^+ e^-$ Annihilation

Scharre, D.L. ; Fong, A. ; Pun, T. ; et al.
Phys.Rev.Lett. 41 (1978) 1005, 1978.
Inspire Record 130859 DOI 10.17182/hepdata.20888

We have measured inclusive γ and π0 production in multiprong events produced by e+e− annihilation in the center-of-mass energy range 4.9 to 7.4 GeV. We find the π0 inclusive cross section to be consistent in shape and normalization with half the charged-π cross section between x=0.15 and 0.60, with an integrated inclusive cross-section ratio of σ(π0)|σ(π+)+σ(π−)|=0.47±0.10.

1 data table
Table 1

NUMERICAL VALUES OF DATA FROM THIS EXPERIMENT HAVE NOT BEEN KEPT (M. L. PERL, PRIV COMM, 3 MAY 1979).


Inclusive $\pi^+$ to $\pi^-$ Ratios and Quark Distributions of Pions and Nucleons

Eisenberg, Y. ; Haber, B. ; Hochman, D. ; et al.
Phys.Lett.B 83 (1979) 127, 1979.
Inspire Record 131271 DOI 10.17182/hepdata.27334

The ratio R of inclusive π + π − production at low transverse momenta is measured in π + n and pn interactions at 195 GeV/ c . R ( 1 R ) in the proton (neutron) fragmentation region increases with Feynman- x and is smaller than R from π + fragmentation. The results agree with a quark-quark scattering model originally proposed for “hard” processes and disagree with a modified version of the model which includes gluon scattering.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Experimental Confirmation of the 1100 Structure and First Observation of the Leptonic Decay of the $\rho^\prime$ (1250)

Bartalucci, S. ; Basini, G. ; Bertolucci, S. ; et al.
Nuovo Cim.A 49 (1979) 207, 1979.
Inspire Record 131639 DOI 10.17182/hepdata.37533

We have extended our survey of the reaction γ+p→p+e++e− by collecting 20 000 additional e+e− pairs in the invariant-mass region 900

1 data table
Table 1

No description provided.


Xi- and Anti-xi+ Production in $\pi^- p$ Interactions at 16-{GeV}/$c$

Balea, E. ; Berceanu, S. ; Coca, C. ; et al.
Nucl.Phys.B 150 (1979) 345-356, 1979.
Inspire Record 131824 DOI 10.17182/hepdata.34790

Production of Ξ − and Ξ + hyperons has been studied in 16 GeV/ c π − p interactions. Cross sections are given for Ξ − and gX + production. Distributions and average values of c.m. production angle, transverse and longitudinal variables are presented. Characteristics of some Ξ final states identified are also presented.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Precision Measurement of Proton Proton Total Cross-section at the {CERN} Intersecting Storage Rings

Amaldi, U. ; Cocconi, G. ; Diddens, A.N. ; et al.
Nucl.Phys.B 145 (1978) 367-401, 1978.
Inspire Record 131412 DOI 10.17182/hepdata.34944

The measurement of the proton-proton total cross section performed by the CERN-Pisa-Rome-Stony Brook Collaboration at the CERN ISR is discussed in detail. The total interaction rate, the elastic scattering rate in the forward direction, and the machine luminosity were measured simultaneously to obtain three different determinations of the total cross section. Consistent results were found, which made it possible to prove the reliability of the Van der Meer luminosity calibration within +-0.9% and to achieve a precision of +-0.6% in the measurement of the total cross section.

1 data table
Table 1

No description provided.


Analysis of Nucleon Structure Functions in CERN Bubble Chamber Neutrino Experiments

The Aachen-Bonn-CERN-London-Oxford-Saclay collaboration Bosetti, P.C. ; Deden, H. ; Deutschmann, M. ; et al.
Nucl.Phys.B 142 (1978) 1-28, 1978.
Inspire Record 6678 DOI 10.17182/hepdata.35031

We present results for the differential cross sections of neutrinos and antineutrinos on nucleons in the energy range E = 2−200 GeV, from the BEBC and Gargamelle experiments. The structure functions F 2 , 2 χF 1 and χF 3 have been evaluated as a function of χ and q 2 . Deviations are observed from Bjorken scaling, which are very similar to those found in electron and muon inelastic scattering. For the Callan-Gross ratio, we find 2χF 1 F 2 = 0.80 ± 0.12 and the corresponding value for 〈R〉 = 〈 σ S σ T 〉 = 0.15 ± 0.10 . Our results are consistent with the Gross-Llewellyn-Smith sum rule; we measure ⩾2.5 ± 0.5 valence quarks per nucleon. Quark and antiquark distributions are given. The Nachtmann moments of F 2 and χF 3 are quantitatively consistent with the predictions from QCD. The value of the strong interaction parameter is λ = 0.74 ± 0.05 GeV without corrections, and 0.66 ± 0.05 GeV including α S 2 corrections. The moments of the gluon distribution are found to be positive and indicate an χ distribution of gluons which is comparable with that of the valence quarks.

2 data tables
Table 1

No description provided.

Table 2

No description provided.