Belusevic, R.
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Charm Photoproduction

The Tagged Photon Spectrometer collaboration Anjos, J.C. ; Appel, J.A. ; Bean, A. ; et al.
Phys.Rev.Lett. 62 (1989) 513-516, 1989.
Inspire Record 289318 DOI 10.17182/hepdata.20043

We present results on the photoproduction of 10 000 charmed particles from the 108 recorded triggers of Fermilab experiment E691. The total cross section for the photoproduction of D0 and D+ particles (and antiparticles) for xF>0.2 is measured to be 3.88±0.06±0.40 μb/Be nucleus at 〈Eγ〉=145 GeV. We have also measured the relative production of different charmed particles, their pT2 and xF distributions, and the energy dependence of the total charm cross section. The mean pT2 is 1.16±0.04 GeV2/c2 and the ratio of charm cross sections at 200 and 100 GeV is 1.96±0.24. Results of fits to the xF distribution are also reported.

12 data tables
Table 1

D0/AD0 cross section from K-PI+/K+PI- decay mode.

Table 2

D+/D- cross section from K-2PI+/K+2PI- decay mode.

Table 3

D*+/D*- cross section from D0<K-PI+>PI+ + CC decay mode.

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The Production of $J/_{\psi}$ and Associated Particles in the Collision of 530 GeV/c Protons and Pions with Nuclear Targets

De, K. ; Crittenden, R. ; Dzierba, A. ; et al.
(1989) 467-472, 1989.
Inspire Record 280605 DOI 10.17182/hepdata.22998

None

3 data tables
Table 1

Interacting beam cross-section.

Table 2

No description provided.

Table 3

No description provided.


rivet Analysis
Observation of the D*0 (2459) in e+ e- Annihilation

The ARGUS collaboration Albrecht, H. ; Bockmann, P. ; Glaser, R. ; et al.
Phys.Lett.B 221 (1989) 422-426, 1989.
Inspire Record 268577 DOI 10.17182/hepdata.29827

Using the ARGUS detector at the DORIS II storage ring at DESY, we have observed a charmed meson of mass (2455±3±5) MeV/c2, decaying to D + π − . The natural width of this state is determined to be (15 +13+5 −10−10 ) MeV c 2 . The fragmentation function is hard, as expected for a leading charmed particle from nonresonant e + e − annihilation. Analysis of the decay angular distribution supports the hypothesis that the observed state is an L =1 excited charmed meson with spin-parity 2 + .

2 data tables
Table 1

Corrected to zero momentum using fragmentation function of Peterson et al., PR D29 (83) 105.

Table 2

Data read from graph.


rivet Analysis
Measurement of the Reaction $\gamma \gamma \to \rho^+ \rho^-$ With the Cello Detector

The CELLO collaboration Behrend, H.J. ; Criegee, L. ; Dainton, J.B. ; et al.
Phys.Lett.B 218 (1989) 493-498, 1989.
Inspire Record 267081 DOI 10.17182/hepdata.29842

Results on the reaction γγ → π + π − π 0 π 0 are presented. There is clear evidence for correlated ϱ + ϱ − production. The cross section is much lower than for γγ → ϱ 0 ϱ 0 .

2 data tables
Table 1

Results using 3 parameter fit (rho+ rho-, rho+- pi+- pi0, and non-resonant 4pi) to data.

Table 2

Results using 2 parameter fit (rho+ rho-, and non-resonant 4pi) to data.


THE pi, K, PROTON ELECTROMAGNETIC FORM-FACTORS AND NEW RELATED DM2 RESULTS

The DM2 collaboration Castro, A. ; Bisello, D. ; Busetto, G. ; et al.
LAL-88-58, 1988.
Inspire Record 267117 DOI 10.17182/hepdata.38181

None

1 data table
Table 1

No description provided.


CORRELATIONS OVER MULTIPLICITY BETWEEN NEGATIVE PIONS AND PROTONS: PARTICIPANTS IN C Ta INTERACTIONS AT 4.2-GeV/c PER NUCLEON MOMENTUM

Backovic, S. ; Boldea, V. ; Grishin, V.G. ; et al.
Sov.J.Nucl.Phys. 50 (1989) 1001-1005, 1989.
Inspire Record 269366 DOI 10.17182/hepdata.38833

None

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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High Transverse Momentum $\eta$ Production in $\pi^- p$, $\pi^+ p$ and $p p$ Interactions at 280-{GeV}/$c$

The WA70 collaboration Bonesini, M. ; Bonvin, E. ; Booth, P.S. L. ; et al.
Z.Phys.C 42 (1989) 527, 1989.
Inspire Record 267856 DOI 10.17182/hepdata.15526

The inclusive cross sections for η production by the interactions of 280 GeV/c momentum π−, π+, and proton beams in hydrogen have been measured. The kinematical range covered is −0.45<xF<0.45, and 4.0<PT<7.0 GeV/c for FeynmanxF and transverse momentum respectively. The η to π0 cross section ratios are given for the three reactions. The ratio of π−p to π+p cross sections for η production in the above kinematic ranges is 1.22±0.08±0.11.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


rivet Analysis
Two Photon Production of Final States With a $p \bar{p}$ Pair

The ARGUS collaboration Albrecht, H. ; Bockmann, P. ; Glaser, R. ; et al.
Z.Phys.C 42 (1989) 543, 1989.
Inspire Record 267759 DOI 10.17182/hepdata.15473

Two-photon production of the exclusive final statesp\(\bar p\)+nπ (n=0, 1, 2, and 3) has been investigated using the ARGUS detector at thee+e− storage ring DORIS II at DESY. The reactionsγγ→p\(\bar p\)π andγγ→p\(\bar p\)π+π−π0 have been observed for the first time, as have theΔ++ and\(\overline {\Delta ^{ ++ } } \) baryons in the final statep\(\bar p\)π+π−. No evidence was found forΔ++\(\overline {\Delta ^{ ++ } } \) production. Topological cross sections for two-photon production ofp\(\bar p\),p\(\bar p\)π0,p\(\bar p\)π+π− andp\(\bar p\)π+π−π0, as well as the crosssection forγγ→Δ++\(\bar p\)π+π−+c.c., have been measured. Upper limits are given for the cross section forγγ→Δ0\(\overline {\Delta ^0 } \),γγ→Δ++\(\overline {\Delta ^{ ++ } } \) andγγ→Λ\(\bar \Lambda \).

7 data tables
Table 1

Data read from graph.. Additional overall systematic error 13% not included.

Table 2

Data read from graph.. Additional overall systematic error 13% not included.

Table 3

Data read from graph.. Additional overall systematic error 13% not included.

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A Measurement of W Boson Production in 1.8-TeV anti-p p Collisions

The CDF collaboration Abe, F. ; Amidei, D. ; Apollinari, G. ; et al.
Phys.Rev.Lett. 62 (1989) 1005, 1989.
Inspire Record 267998 DOI 10.17182/hepdata.20078

The cross section for the production and subsequent decay to electron and neutrino of the W intermediate vector boson has been measured in 1.8-TeV p¯p collisions at the Fermilab Tevatron Collider. An analysis of events with missing transverse energy greater than 25 GeV and with an electron of transverse energy greater than 15 GeV from a datum sample of 25.3 nb−1 gives σB=2.6±0.6±0.5 nb.

1 data table
Table 1

Branching ratio to electron and neutrino.


Measurement of the Inclusive Jet Cross-Section in anti-p p Collisions at s**(1/2) = 1.8-TeV

The CDF collaboration Abe, F. ; Amidei, D. ; Apollinari, G. ; et al.
Phys.Rev.Lett. 62 (1989) 613, 1989.
Inspire Record 267999 DOI 10.17182/hepdata.20032

Inclusive jet production at s=1.8 TeV has been measured in the CDF detector at the Fermilab Tevatron p¯p Collider. Jets with transverse energies (Et) up to 250 GeV have been observed. The Et dependence of the inclusive jet cross section is consistent with leading-order quantum-chromodynamic calculations, and comparison with lower-energy data shows deviations from scaling consistent with QCD. A lower limit of 700 GeV (95% confidence level) is placed on the quark compositeness scale parameter Λc associated with an effective contact interaction.

1 data table
Table 1

No description provided.