Cordier, A.
Max results
Sort by Reverse order

Showing 10 of 6826 results

Date

Measurement of the Spin Correlation Parameters A(ll) and A(sl) for the Reaction $P P \to D \pi^+$ in the Energy Region 500-{MeV} - 800-{MeV}

Barlow, D.B. ; Saha, A. ; Seth, K.K. ; et al.
Phys.Rev.C 37 (1988) 1977-1986, 1988.
Inspire Record 242361 DOI 10.17182/hepdata.26282

Angular distributions of the spin-correlation parameters Asl and All for the reaction pp→π+d have been measured at pion center-of-mass angles 40°≤θπ+*≤130° at incident energies of 500, 650, and 800 MeV. Additional measurements of All were made at 600, 700, and 750 MeV. The results of the experiment are compared with the predictions of several unified coupled-channel calculations and partial-wave analyses. While the latest partial-wave analyses were found to fit the data reasonably well, all except one of the various model predictions not only do not fit the data well, but also tend to be in disagreement with each other. The data show no clear sign of a need for proposed dibaryon resonances.

9 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Neutral and Charged $D^*$ Production in 360-{GeV}/$c \pi^- p$ Interactions

The LEBC-EHS collaboration Aguilar-Benitez, M. ; Allison, W.W. ; Baland, J.F. ; et al.
Phys.Lett.B 169 (1986) 106-112, 1986.
Inspire Record 227059 DOI 10.17182/hepdata.30268

The first data on the production of D ∗ (2010) are presented as observed in π − -proton interactions at √ s = 27 GeV . It is found that D ∗ (2010) dominates the total charm D-meson production, without a significant non-central component.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Observation of Double $\phi$ Meson Production in the Central Region for the Reactions $\pi^+ P \to \pi^+ (K^+ K^+ K^- K^-$) $P$ and $P P \to P (K^+ K^+ K^- K^-$) $P$ at 85-{GeV}/c

The ATHENS-BARI-BIRMINGHAM-CERN collaboration Armstrong, T.A. ; Bloodworth, I.J. ; Carney, J.N. ; et al.
Phys.Lett.B 166 (1986) 245-248, 1986.
Inspire Record 228698 DOI 10.17182/hepdata.30307

The reactions π + p → π + ( K + K + K − K − ) p and pp → p ( K + K + K − K − ) p in which the K + K + K − K − system is centrally produced have been studied at 85 GeV c . Evidence is found for φφ production. The relative rates for production of φφ , φK + K − and K + K + K − K − have been determined.

1 data table
Table 1

No description provided.


High-energy Photoproduction of Large Transverse Momentum $\pi^0$ Mesons: A Quantitative Test of {QCD}

The NA14 collaboration Auge, E. ; Barate, R. ; Bloch, D. ; et al.
Phys.Lett.B 168 (1986) 163-169, 1986.
Inspire Record 227057 DOI 10.17182/hepdata.30278

The first results on inclusive photoproduction of π 0 at transverse momenta up to 4 GeV/ c , using incident γ energies between 50 and 150 GeV are presented. A comparison is made with inclusive π 0 production obtained, in the same experiment, with incident π − . Using the π − data to parametrize the hadronic behaviour of the photon, significant differences are observed in quantitative agreement with QCD Compton scattering and corrections thereof.

2 data tables
Table 1

FC,IC,BC REFER TO FORWARD,INTERMEDIATE AND BACKWARD CALORIMETERS.

Table 2

FC,IC,BC REFER TO FORWARD,INTERMEDIATE AND BACKWARD CALORIMETERS.


Lepton and pion pair production in γγ collisions measured near the threshold at DCI

Courau, A. ; Falvard, A. ; Haissinski, J. ; et al.
Nucl.Phys.B 271 (1986) 86800013 1-20, 1986.
Inspire Record 232808 DOI 10.17182/hepdata.38240

This paper reports a complete analysis of data taken at DCI to measure lepton and pion pair production close to the threshold in two-photon processes: e+e− → e+e−(e+e−, μ+μ−, π+π−). Preliminary results have been previously published including one-half of the total statistics. Final results presented here are in good agreement with QED for lepton pair production. The measured cross section for pion pair production is twice as large as that expected from Born terms only — a two standard deviation effect.

1 data table
Table 1

Normalised to number of observed electron pairs. Fully corrected for acceptance, radiative effects etc.


INCLUSIVE SIGMA+- (1385) PRODUCTION IN K- P INTERACTIONS AT 110-GEV/C

The BOMBAY-CERN-CRACOW-INNSBRUCK-JAMMU-LONDON-VIENNA-WARSAW collaboration Banerjee, S. ; Ganguli, S.N. ; Gurtu, A. ; et al.
Z.Phys.C 31 (1986) 409-416, 1986.
Inspire Record 236694 DOI 10.17182/hepdata.15860

Results are presented on inclusive production of ∑+(1385) and ∑−(1385) inK−p interactions at 110 GeV/c. The inclusive and topological cross sections have been estimated and compared with published results at lower energies. The inclusive cross section of ∑+(1385) seems to decrease with c.m. energy, while that of the ∑−(1385) is nearly constant. The mean charged multiplicity associate to Σ(1385) increases with c.m. energy. The ∑+(1385) is produced both in the target fragmentation region and in the central region where ∑−(1385) is predominantly produced in the central region. Approximately 16% of the Λ's stem from the decay of ∑±(1385) and the kinematic distributions of these Λ's are not very different from the inclusive Λ's.

1 data table
Table 1

No description provided.


Deuteron Photodisintegration Total Cross-section Between 15-{MeV} and 75-{MeV}

Bernabei, R. ; Incicchitti, A. ; Mattioli, M. ; et al.
Phys.Rev.Lett. 57 (1986) 1542, 1986.
Inspire Record 228928 DOI 10.17182/hepdata.20210

The total cross section for deuteron photodisintegration has been measured in the γ-ray energy range between 15 and 75 MeV, by use of the monochromatic LADON photon beam of the Frascati National Laboratories and detection of the proton. The results are in substantial agreement with the standard theory and do not provide evidence for contributions of quark degrees of freedom.

1 data table
Table 1

No description provided.


Search for high mass narrow resonances in virtual photon photon interactions

The TPC / TWO GAMMA collaboration Aihara, H. ; Alston-Garnjost, M. ; Avery, R.E. ; et al.
Phys.Rev.Lett. 57 (1986) 3245-3248, 1986.
Inspire Record 239032 DOI 10.17182/hepdata.20201

We report on the first search with virtual photon-photon collisions for narrow, neutral resonances with even C parity in the mass range 4.5

1 data table
Table 1

No description provided.


Production of the F0 Meson in the Double Pomeron Exchange Reaction $p p \to p p \pi^+ \pi^-$ at $\sqrt{s}=62$-{GeV}

The Ames-Bologna-CERN-Dortmund-Heidelberg-Warsaw collaboration Breakstone, A. ; Campanini, R. ; Crawley, H.B. ; et al.
Z.Phys.C 31 (1986) 185, 1986.
Inspire Record 227129 DOI 10.17182/hepdata.15893

Data are presented for the exclusive reaction pp → pp π+ π− at\(\sqrt s= 62GeV\) with two leading protons at large Feynman-x and a centrally produced π+;π− system. In this kinematical configuration one expects a substantial contribution from Double Pomeron Exchange, which is a potential source of glueballs. The experiment was performed at the CERN ISR using the Split Field Magnet spectrometer. In the mass range between 1,000 and 1,700 MeV/c2 the invariant mass distribution for the central π+;π− system exhibits a very significant signal for thef0(1270) and no other obvious resonant states.

1 data table
Table 1

No description provided.


A STUDY OF ANTI-N P ANNIHILATIONS BETWEEN 0.5-GEV/C AND 0.8-GEV/C

The BOMBAY-CHANDIGARH-JAMMU-TOKYO collaboration Banerjee, S. ; Ganguli, S.N. ; Gurtu, A. ; et al.
Z.Phys.C 32 (1986) 163-170, 1986.
Inspire Record 238230 DOI 10.17182/hepdata.15843

None

10 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…